#include "macro.h"
#include "cap-list.h"
#include "formats-util.h"
+#include "terminal-util.h"
#include "bus-message.h"
#include "bus-internal.h"
#include "bus-signature.h"
#include "bus-type.h"
#include "busctl-introspect.h"
+#include "terminal-util.h"
static bool arg_no_pager = false;
static bool arg_legend = true;
#include "spawn-polkit-agent.h"
#include "verbs.h"
#include "process-util.h"
+#include "terminal-util.h"
static char **arg_property = NULL;
static bool arg_all = false;
#include "bus-util.h"
#include "logind-action.h"
#include "formats-util.h"
+#include "process-util.h"
+#include "terminal-util.h"
int manager_handle_action(
Manager *m,
#include "bus-error.h"
#include "udev-util.h"
#include "logind.h"
+#include "terminal-util.h"
int manager_add_device(Manager *m, const char *sysfs, bool master, Device **_device) {
Device *d;
#include "efivars.h"
#include "logind.h"
#include "formats-util.h"
+#include "process-util.h"
+#include "terminal-util.h"
int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
#include "util.h"
#include "mkdir.h"
#include "formats-util.h"
+#include "terminal-util.h"
Seat *seat_new(Manager *m, const char *id) {
Seat *s;
#include "def.h"
#include "logind-session.h"
#include "formats-util.h"
+#include "terminal-util.h"
static void session_remove_fifo(Session *s);
#include "fileio.h"
#include "bus-error.h"
#include "formats-util.h"
+#include "terminal-util.h"
static int parse_argv(
pam_handle_t *handle,
#include "sysfs-show.h"
#include "path-util.h"
#include "udev-util.h"
+#include "terminal-util.h"
static int show_sysfs_one(
struct udev *udev,
#include "mkdir.h"
#include "strv.h"
#include "random-util.h"
+#include "terminal-util.h"
#include "ask-password-api.h"
#include "path-util.h"
#include "cgroup-util.h"
#include "cgroup-show.h"
+#include "terminal-util.h"
static int compare(const void *a, const void *b) {
const pid_t *p = a, *q = b;
#include "macro.h"
#include "socket-util.h"
#include "formats-util.h"
+#include "process-util.h"
+#include "terminal-util.h"
#define SNDBUF_SIZE (8*1024*1024)
#include "hashmap.h"
#include "journal-internal.h"
#include "formats-util.h"
+#include "process-util.h"
+#include "terminal-util.h"
/* up to three lines (each up to 100 characters),
or 300 characters, whichever is less */
#include "util.h"
#include "process-util.h"
#include "macro.h"
+#include "terminal-util.h"
static pid_t pager_pid = 0;
--- /dev/null
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <termios.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <time.h>
+#include <assert.h>
+#include <poll.h>
+#include <linux/vt.h>
+#include <linux/tiocl.h>
+#include <linux/kd.h>
+
+#include "terminal-util.h"
+#include "time-util.h"
+#include "process-util.h"
+#include "util.h"
+#include "fileio.h"
+#include "path-util.h"
+
+static volatile unsigned cached_columns = 0;
+static volatile unsigned cached_lines = 0;
+
+int chvt(int vt) {
+ _cleanup_close_ int fd;
+
+ fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ if (vt < 0) {
+ int tiocl[2] = {
+ TIOCL_GETKMSGREDIRECT,
+ 0
+ };
+
+ if (ioctl(fd, TIOCLINUX, tiocl) < 0)
+ return -errno;
+
+ vt = tiocl[0] <= 0 ? 1 : tiocl[0];
+ }
+
+ if (ioctl(fd, VT_ACTIVATE, vt) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) {
+ struct termios old_termios, new_termios;
+ char c, line[LINE_MAX];
+
+ assert(f);
+ assert(ret);
+
+ if (tcgetattr(fileno(f), &old_termios) >= 0) {
+ new_termios = old_termios;
+
+ new_termios.c_lflag &= ~ICANON;
+ new_termios.c_cc[VMIN] = 1;
+ new_termios.c_cc[VTIME] = 0;
+
+ if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
+ size_t k;
+
+ if (t != USEC_INFINITY) {
+ if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) {
+ tcsetattr(fileno(f), TCSADRAIN, &old_termios);
+ return -ETIMEDOUT;
+ }
+ }
+
+ k = fread(&c, 1, 1, f);
+
+ tcsetattr(fileno(f), TCSADRAIN, &old_termios);
+
+ if (k <= 0)
+ return -EIO;
+
+ if (need_nl)
+ *need_nl = c != '\n';
+
+ *ret = c;
+ return 0;
+ }
+ }
+
+ if (t != USEC_INFINITY) {
+ if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0)
+ return -ETIMEDOUT;
+ }
+
+ errno = 0;
+ if (!fgets(line, sizeof(line), f))
+ return errno ? -errno : -EIO;
+
+ truncate_nl(line);
+
+ if (strlen(line) != 1)
+ return -EBADMSG;
+
+ if (need_nl)
+ *need_nl = false;
+
+ *ret = line[0];
+ return 0;
+}
+
+int ask_char(char *ret, const char *replies, const char *text, ...) {
+ int r;
+
+ assert(ret);
+ assert(replies);
+ assert(text);
+
+ for (;;) {
+ va_list ap;
+ char c;
+ bool need_nl = true;
+
+ if (on_tty())
+ fputs(ANSI_HIGHLIGHT_ON, stdout);
+
+ va_start(ap, text);
+ vprintf(text, ap);
+ va_end(ap);
+
+ if (on_tty())
+ fputs(ANSI_HIGHLIGHT_OFF, stdout);
+
+ fflush(stdout);
+
+ r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl);
+ if (r < 0) {
+
+ if (r == -EBADMSG) {
+ puts("Bad input, please try again.");
+ continue;
+ }
+
+ putchar('\n');
+ return r;
+ }
+
+ if (need_nl)
+ putchar('\n');
+
+ if (strchr(replies, c)) {
+ *ret = c;
+ return 0;
+ }
+
+ puts("Read unexpected character, please try again.");
+ }
+}
+
+int ask_string(char **ret, const char *text, ...) {
+ assert(ret);
+ assert(text);
+
+ for (;;) {
+ char line[LINE_MAX];
+ va_list ap;
+
+ if (on_tty())
+ fputs(ANSI_HIGHLIGHT_ON, stdout);
+
+ va_start(ap, text);
+ vprintf(text, ap);
+ va_end(ap);
+
+ if (on_tty())
+ fputs(ANSI_HIGHLIGHT_OFF, stdout);
+
+ fflush(stdout);
+
+ errno = 0;
+ if (!fgets(line, sizeof(line), stdin))
+ return errno ? -errno : -EIO;
+
+ if (!endswith(line, "\n"))
+ putchar('\n');
+ else {
+ char *s;
+
+ if (isempty(line))
+ continue;
+
+ truncate_nl(line);
+ s = strdup(line);
+ if (!s)
+ return -ENOMEM;
+
+ *ret = s;
+ return 0;
+ }
+ }
+}
+
+int reset_terminal_fd(int fd, bool switch_to_text) {
+ struct termios termios;
+ int r = 0;
+
+ /* Set terminal to some sane defaults */
+
+ assert(fd >= 0);
+
+ /* We leave locked terminal attributes untouched, so that
+ * Plymouth may set whatever it wants to set, and we don't
+ * interfere with that. */
+
+ /* Disable exclusive mode, just in case */
+ ioctl(fd, TIOCNXCL);
+
+ /* Switch to text mode */
+ if (switch_to_text)
+ ioctl(fd, KDSETMODE, KD_TEXT);
+
+ /* Enable console unicode mode */
+ ioctl(fd, KDSKBMODE, K_UNICODE);
+
+ if (tcgetattr(fd, &termios) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ /* We only reset the stuff that matters to the software. How
+ * hardware is set up we don't touch assuming that somebody
+ * else will do that for us */
+
+ termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
+ termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
+ termios.c_oflag |= ONLCR;
+ termios.c_cflag |= CREAD;
+ termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
+
+ termios.c_cc[VINTR] = 03; /* ^C */
+ termios.c_cc[VQUIT] = 034; /* ^\ */
+ termios.c_cc[VERASE] = 0177;
+ termios.c_cc[VKILL] = 025; /* ^X */
+ termios.c_cc[VEOF] = 04; /* ^D */
+ termios.c_cc[VSTART] = 021; /* ^Q */
+ termios.c_cc[VSTOP] = 023; /* ^S */
+ termios.c_cc[VSUSP] = 032; /* ^Z */
+ termios.c_cc[VLNEXT] = 026; /* ^V */
+ termios.c_cc[VWERASE] = 027; /* ^W */
+ termios.c_cc[VREPRINT] = 022; /* ^R */
+ termios.c_cc[VEOL] = 0;
+ termios.c_cc[VEOL2] = 0;
+
+ termios.c_cc[VTIME] = 0;
+ termios.c_cc[VMIN] = 1;
+
+ if (tcsetattr(fd, TCSANOW, &termios) < 0)
+ r = -errno;
+
+finish:
+ /* Just in case, flush all crap out */
+ tcflush(fd, TCIOFLUSH);
+
+ return r;
+}
+
+int reset_terminal(const char *name) {
+ _cleanup_close_ int fd = -1;
+
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ return reset_terminal_fd(fd, true);
+}
+
+int open_terminal(const char *name, int mode) {
+ int fd, r;
+ unsigned c = 0;
+
+ /*
+ * If a TTY is in the process of being closed opening it might
+ * cause EIO. This is horribly awful, but unlikely to be
+ * changed in the kernel. Hence we work around this problem by
+ * retrying a couple of times.
+ *
+ * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
+ */
+
+ assert(!(mode & O_CREAT));
+
+ for (;;) {
+ fd = open(name, mode, 0);
+ if (fd >= 0)
+ break;
+
+ if (errno != EIO)
+ return -errno;
+
+ /* Max 1s in total */
+ if (c >= 20)
+ return -errno;
+
+ usleep(50 * USEC_PER_MSEC);
+ c++;
+ }
+
+ r = isatty(fd);
+ if (r < 0) {
+ safe_close(fd);
+ return -errno;
+ }
+
+ if (!r) {
+ safe_close(fd);
+ return -ENOTTY;
+ }
+
+ return fd;
+}
+
+int acquire_terminal(
+ const char *name,
+ bool fail,
+ bool force,
+ bool ignore_tiocstty_eperm,
+ usec_t timeout) {
+
+ int fd = -1, notify = -1, r = 0, wd = -1;
+ usec_t ts = 0;
+
+ assert(name);
+
+ /* We use inotify to be notified when the tty is closed. We
+ * create the watch before checking if we can actually acquire
+ * it, so that we don't lose any event.
+ *
+ * Note: strictly speaking this actually watches for the
+ * device being closed, it does *not* really watch whether a
+ * tty loses its controlling process. However, unless some
+ * rogue process uses TIOCNOTTY on /dev/tty *after* closing
+ * its tty otherwise this will not become a problem. As long
+ * as the administrator makes sure not configure any service
+ * on the same tty as an untrusted user this should not be a
+ * problem. (Which he probably should not do anyway.) */
+
+ if (timeout != USEC_INFINITY)
+ ts = now(CLOCK_MONOTONIC);
+
+ if (!fail && !force) {
+ notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0));
+ if (notify < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ wd = inotify_add_watch(notify, name, IN_CLOSE);
+ if (wd < 0) {
+ r = -errno;
+ goto fail;
+ }
+ }
+
+ for (;;) {
+ struct sigaction sa_old, sa_new = {
+ .sa_handler = SIG_IGN,
+ .sa_flags = SA_RESTART,
+ };
+
+ if (notify >= 0) {
+ r = flush_fd(notify);
+ if (r < 0)
+ goto fail;
+ }
+
+ /* We pass here O_NOCTTY only so that we can check the return
+ * value TIOCSCTTY and have a reliable way to figure out if we
+ * successfully became the controlling process of the tty */
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
+ * if we already own the tty. */
+ assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
+
+ /* First, try to get the tty */
+ if (ioctl(fd, TIOCSCTTY, force) < 0)
+ r = -errno;
+
+ assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
+
+ /* Sometimes it makes sense to ignore TIOCSCTTY
+ * returning EPERM, i.e. when very likely we already
+ * are have this controlling terminal. */
+ if (r < 0 && r == -EPERM && ignore_tiocstty_eperm)
+ r = 0;
+
+ if (r < 0 && (force || fail || r != -EPERM)) {
+ goto fail;
+ }
+
+ if (r >= 0)
+ break;
+
+ assert(!fail);
+ assert(!force);
+ assert(notify >= 0);
+
+ for (;;) {
+ union inotify_event_buffer buffer;
+ struct inotify_event *e;
+ ssize_t l;
+
+ if (timeout != USEC_INFINITY) {
+ usec_t n;
+
+ n = now(CLOCK_MONOTONIC);
+ if (ts + timeout < n) {
+ r = -ETIMEDOUT;
+ goto fail;
+ }
+
+ r = fd_wait_for_event(fd, POLLIN, ts + timeout - n);
+ if (r < 0)
+ goto fail;
+
+ if (r == 0) {
+ r = -ETIMEDOUT;
+ goto fail;
+ }
+ }
+
+ l = read(notify, &buffer, sizeof(buffer));
+ if (l < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+
+ r = -errno;
+ goto fail;
+ }
+
+ FOREACH_INOTIFY_EVENT(e, buffer, l) {
+ if (e->wd != wd || !(e->mask & IN_CLOSE)) {
+ r = -EIO;
+ goto fail;
+ }
+ }
+
+ break;
+ }
+
+ /* We close the tty fd here since if the old session
+ * ended our handle will be dead. It's important that
+ * we do this after sleeping, so that we don't enter
+ * an endless loop. */
+ fd = safe_close(fd);
+ }
+
+ safe_close(notify);
+
+ r = reset_terminal_fd(fd, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to reset terminal: %m");
+
+ return fd;
+
+fail:
+ safe_close(fd);
+ safe_close(notify);
+
+ return r;
+}
+
+int release_terminal(void) {
+ static const struct sigaction sa_new = {
+ .sa_handler = SIG_IGN,
+ .sa_flags = SA_RESTART,
+ };
+
+ _cleanup_close_ int fd = -1;
+ struct sigaction sa_old;
+ int r = 0;
+
+ fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
+ * by our own TIOCNOTTY */
+ assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
+
+ if (ioctl(fd, TIOCNOTTY) < 0)
+ r = -errno;
+
+ assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
+
+ return r;
+}
+
+int terminal_vhangup_fd(int fd) {
+ assert(fd >= 0);
+
+ if (ioctl(fd, TIOCVHANGUP) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int terminal_vhangup(const char *name) {
+ _cleanup_close_ int fd;
+
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ return terminal_vhangup_fd(fd);
+}
+
+int vt_disallocate(const char *name) {
+ int fd, r;
+ unsigned u;
+
+ /* Deallocate the VT if possible. If not possible
+ * (i.e. because it is the active one), at least clear it
+ * entirely (including the scrollback buffer) */
+
+ if (!startswith(name, "/dev/"))
+ return -EINVAL;
+
+ if (!tty_is_vc(name)) {
+ /* So this is not a VT. I guess we cannot deallocate
+ * it then. But let's at least clear the screen */
+
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ loop_write(fd,
+ "\033[r" /* clear scrolling region */
+ "\033[H" /* move home */
+ "\033[2J", /* clear screen */
+ 10, false);
+ safe_close(fd);
+
+ return 0;
+ }
+
+ if (!startswith(name, "/dev/tty"))
+ return -EINVAL;
+
+ r = safe_atou(name+8, &u);
+ if (r < 0)
+ return r;
+
+ if (u <= 0)
+ return -EINVAL;
+
+ /* Try to deallocate */
+ fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ r = ioctl(fd, VT_DISALLOCATE, u);
+ safe_close(fd);
+
+ if (r >= 0)
+ return 0;
+
+ if (errno != EBUSY)
+ return -errno;
+
+ /* Couldn't deallocate, so let's clear it fully with
+ * scrollback */
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ loop_write(fd,
+ "\033[r" /* clear scrolling region */
+ "\033[H" /* move home */
+ "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
+ 10, false);
+ safe_close(fd);
+
+ return 0;
+}
+
+void warn_melody(void) {
+ _cleanup_close_ int fd = -1;
+
+ fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY);
+ if (fd < 0)
+ return;
+
+ /* Yeah, this is synchronous. Kinda sucks. But well... */
+
+ ioctl(fd, KIOCSOUND, (int)(1193180/440));
+ usleep(125*USEC_PER_MSEC);
+
+ ioctl(fd, KIOCSOUND, (int)(1193180/220));
+ usleep(125*USEC_PER_MSEC);
+
+ ioctl(fd, KIOCSOUND, (int)(1193180/220));
+ usleep(125*USEC_PER_MSEC);
+
+ ioctl(fd, KIOCSOUND, 0);
+}
+
+int make_console_stdio(void) {
+ int fd, r;
+
+ /* Make /dev/console the controlling terminal and stdin/stdout/stderr */
+
+ fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY);
+ if (fd < 0)
+ return log_error_errno(fd, "Failed to acquire terminal: %m");
+
+ r = make_stdio(fd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to duplicate terminal fd: %m");
+
+ return 0;
+}
+
+int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
+ static const char status_indent[] = " "; /* "[" STATUS "] " */
+ _cleanup_free_ char *s = NULL;
+ _cleanup_close_ int fd = -1;
+ struct iovec iovec[6] = {};
+ int n = 0;
+ static bool prev_ephemeral;
+
+ assert(format);
+
+ /* This is independent of logging, as status messages are
+ * optional and go exclusively to the console. */
+
+ if (vasprintf(&s, format, ap) < 0)
+ return log_oom();
+
+ fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ if (ellipse) {
+ char *e;
+ size_t emax, sl;
+ int c;
+
+ c = fd_columns(fd);
+ if (c <= 0)
+ c = 80;
+
+ sl = status ? sizeof(status_indent)-1 : 0;
+
+ emax = c - sl - 1;
+ if (emax < 3)
+ emax = 3;
+
+ e = ellipsize(s, emax, 50);
+ if (e) {
+ free(s);
+ s = e;
+ }
+ }
+
+ if (prev_ephemeral)
+ IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
+ prev_ephemeral = ephemeral;
+
+ if (status) {
+ if (!isempty(status)) {
+ IOVEC_SET_STRING(iovec[n++], "[");
+ IOVEC_SET_STRING(iovec[n++], status);
+ IOVEC_SET_STRING(iovec[n++], "] ");
+ } else
+ IOVEC_SET_STRING(iovec[n++], status_indent);
+ }
+
+ IOVEC_SET_STRING(iovec[n++], s);
+ if (!ephemeral)
+ IOVEC_SET_STRING(iovec[n++], "\n");
+
+ if (writev(fd, iovec, n) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
+ va_list ap;
+ int r;
+
+ assert(format);
+
+ va_start(ap, format);
+ r = status_vprintf(status, ellipse, ephemeral, format, ap);
+ va_end(ap);
+
+ return r;
+}
+
+bool tty_is_vc(const char *tty) {
+ assert(tty);
+
+ return vtnr_from_tty(tty) >= 0;
+}
+
+bool tty_is_console(const char *tty) {
+ assert(tty);
+
+ if (startswith(tty, "/dev/"))
+ tty += 5;
+
+ return streq(tty, "console");
+}
+
+int vtnr_from_tty(const char *tty) {
+ int i, r;
+
+ assert(tty);
+
+ if (startswith(tty, "/dev/"))
+ tty += 5;
+
+ if (!startswith(tty, "tty") )
+ return -EINVAL;
+
+ if (tty[3] < '0' || tty[3] > '9')
+ return -EINVAL;
+
+ r = safe_atoi(tty+3, &i);
+ if (r < 0)
+ return r;
+
+ if (i < 0 || i > 63)
+ return -EINVAL;
+
+ return i;
+}
+
+char *resolve_dev_console(char **active) {
+ char *tty;
+
+ /* Resolve where /dev/console is pointing to, if /sys is actually ours
+ * (i.e. not read-only-mounted which is a sign for container setups) */
+
+ if (path_is_read_only_fs("/sys") > 0)
+ return NULL;
+
+ if (read_one_line_file("/sys/class/tty/console/active", active) < 0)
+ return NULL;
+
+ /* If multiple log outputs are configured the last one is what
+ * /dev/console points to */
+ tty = strrchr(*active, ' ');
+ if (tty)
+ tty++;
+ else
+ tty = *active;
+
+ if (streq(tty, "tty0")) {
+ char *tmp;
+
+ /* Get the active VC (e.g. tty1) */
+ if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
+ free(*active);
+ tty = *active = tmp;
+ }
+ }
+
+ return tty;
+}
+
+bool tty_is_vc_resolve(const char *tty) {
+ _cleanup_free_ char *active = NULL;
+
+ assert(tty);
+
+ if (startswith(tty, "/dev/"))
+ tty += 5;
+
+ if (streq(tty, "console")) {
+ tty = resolve_dev_console(&active);
+ if (!tty)
+ return false;
+ }
+
+ return tty_is_vc(tty);
+}
+
+const char *default_term_for_tty(const char *tty) {
+ assert(tty);
+
+ return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt220";
+}
+
+int fd_columns(int fd) {
+ struct winsize ws = {};
+
+ if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
+ return -errno;
+
+ if (ws.ws_col <= 0)
+ return -EIO;
+
+ return ws.ws_col;
+}
+
+unsigned columns(void) {
+ const char *e;
+ int c;
+
+ if (_likely_(cached_columns > 0))
+ return cached_columns;
+
+ c = 0;
+ e = getenv("COLUMNS");
+ if (e)
+ (void) safe_atoi(e, &c);
+
+ if (c <= 0)
+ c = fd_columns(STDOUT_FILENO);
+
+ if (c <= 0)
+ c = 80;
+
+ cached_columns = c;
+ return cached_columns;
+}
+
+int fd_lines(int fd) {
+ struct winsize ws = {};
+
+ if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
+ return -errno;
+
+ if (ws.ws_row <= 0)
+ return -EIO;
+
+ return ws.ws_row;
+}
+
+unsigned lines(void) {
+ const char *e;
+ int l;
+
+ if (_likely_(cached_lines > 0))
+ return cached_lines;
+
+ l = 0;
+ e = getenv("LINES");
+ if (e)
+ (void) safe_atoi(e, &l);
+
+ if (l <= 0)
+ l = fd_lines(STDOUT_FILENO);
+
+ if (l <= 0)
+ l = 24;
+
+ cached_lines = l;
+ return cached_lines;
+}
+
+/* intended to be used as a SIGWINCH sighandler */
+void columns_lines_cache_reset(int signum) {
+ cached_columns = 0;
+ cached_lines = 0;
+}
+
+bool on_tty(void) {
+ static int cached_on_tty = -1;
+
+ if (_unlikely_(cached_on_tty < 0))
+ cached_on_tty = isatty(STDOUT_FILENO) > 0;
+
+ return cached_on_tty;
+}
+
+int make_stdio(int fd) {
+ int r, s, t;
+
+ assert(fd >= 0);
+
+ r = dup2(fd, STDIN_FILENO);
+ s = dup2(fd, STDOUT_FILENO);
+ t = dup2(fd, STDERR_FILENO);
+
+ if (fd >= 3)
+ safe_close(fd);
+
+ if (r < 0 || s < 0 || t < 0)
+ return -errno;
+
+ /* Explicitly unset O_CLOEXEC, since if fd was < 3, then
+ * dup2() was a NOP and the bit hence possibly set. */
+ fd_cloexec(STDIN_FILENO, false);
+ fd_cloexec(STDOUT_FILENO, false);
+ fd_cloexec(STDERR_FILENO, false);
+
+ return 0;
+}
+
+int make_null_stdio(void) {
+ int null_fd;
+
+ null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
+ if (null_fd < 0)
+ return -errno;
+
+ return make_stdio(null_fd);
+}
+
+int getttyname_malloc(int fd, char **ret) {
+ size_t l = 100;
+ int r;
+
+ assert(fd >= 0);
+ assert(ret);
+
+ for (;;) {
+ char path[l];
+
+ r = ttyname_r(fd, path, sizeof(path));
+ if (r == 0) {
+ const char *p;
+ char *c;
+
+ p = startswith(path, "/dev/");
+ c = strdup(p ?: path);
+ if (!c)
+ return -ENOMEM;
+
+ *ret = c;
+ return 0;
+ }
+
+ if (r != ERANGE)
+ return -r;
+
+ l *= 2;
+ }
+
+ return 0;
+}
+
+int getttyname_harder(int fd, char **r) {
+ int k;
+ char *s = NULL;
+
+ k = getttyname_malloc(fd, &s);
+ if (k < 0)
+ return k;
+
+ if (streq(s, "tty")) {
+ free(s);
+ return get_ctty(0, NULL, r);
+ }
+
+ *r = s;
+ return 0;
+}
+
+int get_ctty_devnr(pid_t pid, dev_t *d) {
+ int r;
+ _cleanup_free_ char *line = NULL;
+ const char *p;
+ unsigned long ttynr;
+
+ assert(pid >= 0);
+
+ p = procfs_file_alloca(pid, "stat");
+ r = read_one_line_file(p, &line);
+ if (r < 0)
+ return r;
+
+ p = strrchr(line, ')');
+ if (!p)
+ return -EIO;
+
+ p++;
+
+ if (sscanf(p, " "
+ "%*c " /* state */
+ "%*d " /* ppid */
+ "%*d " /* pgrp */
+ "%*d " /* session */
+ "%lu ", /* ttynr */
+ &ttynr) != 1)
+ return -EIO;
+
+ if (major(ttynr) == 0 && minor(ttynr) == 0)
+ return -ENOENT;
+
+ if (d)
+ *d = (dev_t) ttynr;
+
+ return 0;
+}
+
+int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
+ char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL;
+ _cleanup_free_ char *s = NULL;
+ const char *p;
+ dev_t devnr;
+ int k;
+
+ assert(r);
+
+ k = get_ctty_devnr(pid, &devnr);
+ if (k < 0)
+ return k;
+
+ sprintf(fn, "/dev/char/%u:%u", major(devnr), minor(devnr));
+
+ k = readlink_malloc(fn, &s);
+ if (k < 0) {
+
+ if (k != -ENOENT)
+ return k;
+
+ /* This is an ugly hack */
+ if (major(devnr) == 136) {
+ if (asprintf(&b, "pts/%u", minor(devnr)) < 0)
+ return -ENOMEM;
+ } else {
+ /* Probably something like the ptys which have no
+ * symlink in /dev/char. Let's return something
+ * vaguely useful. */
+
+ b = strdup(fn + 5);
+ if (!b)
+ return -ENOMEM;
+ }
+ } else {
+ if (startswith(s, "/dev/"))
+ p = s + 5;
+ else if (startswith(s, "../"))
+ p = s + 3;
+ else
+ p = s;
+
+ b = strdup(p);
+ if (!b)
+ return -ENOMEM;
+ }
+
+ *r = b;
+ if (_devnr)
+ *_devnr = devnr;
+
+ return 0;
+}
--- /dev/null
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#include "macro.h"
+#include "time-util.h"
+
+#define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
+#define ANSI_RED_ON "\x1B[31m"
+#define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
+#define ANSI_GREEN_ON "\x1B[32m"
+#define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
+#define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
+#define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
+#define ANSI_HIGHLIGHT_OFF "\x1B[0m"
+#define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
+
+int reset_terminal_fd(int fd, bool switch_to_text);
+int reset_terminal(const char *name);
+
+int open_terminal(const char *name, int mode);
+int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
+int release_terminal(void);
+
+int terminal_vhangup_fd(int fd);
+int terminal_vhangup(const char *name);
+
+int chvt(int vt);
+
+int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
+int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
+int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
+
+int vt_disallocate(const char *name);
+
+char *resolve_dev_console(char **active);
+bool tty_is_vc(const char *tty);
+bool tty_is_vc_resolve(const char *tty);
+bool tty_is_console(const char *tty) _pure_;
+int vtnr_from_tty(const char *tty);
+const char *default_term_for_tty(const char *tty);
+
+void warn_melody(void);
+
+int make_stdio(int fd);
+int make_null_stdio(void);
+int make_console_stdio(void);
+
+int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
+int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
+
+int fd_columns(int fd);
+unsigned columns(void);
+int fd_lines(int fd);
+unsigned lines(void);
+void columns_lines_cache_reset(int _unused_ signum);
+
+bool on_tty(void);
+
+static inline const char *ansi_highlight(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_ON : "";
+}
+
+static inline const char *ansi_highlight_red(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
+}
+
+static inline const char *ansi_highlight_green(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
+}
+
+static inline const char *ansi_highlight_yellow(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
+}
+
+static inline const char *ansi_highlight_blue(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
+}
+
+static inline const char *ansi_highlight_off(void) {
+ return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
+}
+
+int get_ctty_devnr(pid_t pid, dev_t *d);
+int get_ctty(pid_t, dev_t *_devnr, char **r);
+
+int getttyname_malloc(int fd, char **r);
+int getttyname_harder(int fd, char **r);
#include <fcntl.h>
#include <dirent.h>
#include <sys/ioctl.h>
-#include <linux/vt.h>
-#include <linux/tiocl.h>
-#include <termios.h>
#include <stdarg.h>
#include <poll.h>
#include <ctype.h>
#include <sys/utsname.h>
#include <pwd.h>
#include <netinet/ip.h>
-#include <linux/kd.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <glob.h>
#include "formats-util.h"
#include "process-util.h"
#include "random-util.h"
+#include "terminal-util.h"
/* Put this test here for a lack of better place */
assert_cc(EAGAIN == EWOULDBLOCK);
int saved_argc = 0;
char **saved_argv = NULL;
-static volatile unsigned cached_columns = 0;
-static volatile unsigned cached_lines = 0;
-
size_t page_size(void) {
static thread_local size_t pgsz = 0;
long r;
return nulstr_contains(table, fstype);
}
-int chvt(int vt) {
- _cleanup_close_ int fd;
-
- fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- if (vt < 0) {
- int tiocl[2] = {
- TIOCL_GETKMSGREDIRECT,
- 0
- };
-
- if (ioctl(fd, TIOCLINUX, tiocl) < 0)
- return -errno;
-
- vt = tiocl[0] <= 0 ? 1 : tiocl[0];
- }
-
- if (ioctl(fd, VT_ACTIVATE, vt) < 0)
- return -errno;
-
- return 0;
-}
-
-int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) {
- struct termios old_termios, new_termios;
- char c, line[LINE_MAX];
-
- assert(f);
- assert(ret);
-
- if (tcgetattr(fileno(f), &old_termios) >= 0) {
- new_termios = old_termios;
-
- new_termios.c_lflag &= ~ICANON;
- new_termios.c_cc[VMIN] = 1;
- new_termios.c_cc[VTIME] = 0;
-
- if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
- size_t k;
-
- if (t != USEC_INFINITY) {
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) {
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
- return -ETIMEDOUT;
- }
- }
-
- k = fread(&c, 1, 1, f);
-
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
-
- if (k <= 0)
- return -EIO;
-
- if (need_nl)
- *need_nl = c != '\n';
-
- *ret = c;
- return 0;
- }
- }
-
- if (t != USEC_INFINITY) {
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0)
- return -ETIMEDOUT;
- }
-
- errno = 0;
- if (!fgets(line, sizeof(line), f))
- return errno ? -errno : -EIO;
-
- truncate_nl(line);
-
- if (strlen(line) != 1)
- return -EBADMSG;
-
- if (need_nl)
- *need_nl = false;
-
- *ret = line[0];
- return 0;
-}
-
-int ask_char(char *ret, const char *replies, const char *text, ...) {
- int r;
-
- assert(ret);
- assert(replies);
- assert(text);
-
- for (;;) {
- va_list ap;
- char c;
- bool need_nl = true;
-
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_ON, stdout);
-
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
-
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
-
- fflush(stdout);
-
- r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl);
- if (r < 0) {
-
- if (r == -EBADMSG) {
- puts("Bad input, please try again.");
- continue;
- }
-
- putchar('\n');
- return r;
- }
-
- if (need_nl)
- putchar('\n');
-
- if (strchr(replies, c)) {
- *ret = c;
- return 0;
- }
-
- puts("Read unexpected character, please try again.");
- }
-}
-
-int ask_string(char **ret, const char *text, ...) {
- assert(ret);
- assert(text);
-
- for (;;) {
- char line[LINE_MAX];
- va_list ap;
-
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_ON, stdout);
-
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
-
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
-
- fflush(stdout);
-
- errno = 0;
- if (!fgets(line, sizeof(line), stdin))
- return errno ? -errno : -EIO;
-
- if (!endswith(line, "\n"))
- putchar('\n');
- else {
- char *s;
-
- if (isempty(line))
- continue;
-
- truncate_nl(line);
- s = strdup(line);
- if (!s)
- return -ENOMEM;
-
- *ret = s;
- return 0;
- }
- }
-}
-
-int reset_terminal_fd(int fd, bool switch_to_text) {
- struct termios termios;
- int r = 0;
-
- /* Set terminal to some sane defaults */
-
- assert(fd >= 0);
-
- /* We leave locked terminal attributes untouched, so that
- * Plymouth may set whatever it wants to set, and we don't
- * interfere with that. */
-
- /* Disable exclusive mode, just in case */
- ioctl(fd, TIOCNXCL);
-
- /* Switch to text mode */
- if (switch_to_text)
- ioctl(fd, KDSETMODE, KD_TEXT);
-
- /* Enable console unicode mode */
- ioctl(fd, KDSKBMODE, K_UNICODE);
-
- if (tcgetattr(fd, &termios) < 0) {
- r = -errno;
- goto finish;
- }
-
- /* We only reset the stuff that matters to the software. How
- * hardware is set up we don't touch assuming that somebody
- * else will do that for us */
-
- termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
- termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
- termios.c_oflag |= ONLCR;
- termios.c_cflag |= CREAD;
- termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
-
- termios.c_cc[VINTR] = 03; /* ^C */
- termios.c_cc[VQUIT] = 034; /* ^\ */
- termios.c_cc[VERASE] = 0177;
- termios.c_cc[VKILL] = 025; /* ^X */
- termios.c_cc[VEOF] = 04; /* ^D */
- termios.c_cc[VSTART] = 021; /* ^Q */
- termios.c_cc[VSTOP] = 023; /* ^S */
- termios.c_cc[VSUSP] = 032; /* ^Z */
- termios.c_cc[VLNEXT] = 026; /* ^V */
- termios.c_cc[VWERASE] = 027; /* ^W */
- termios.c_cc[VREPRINT] = 022; /* ^R */
- termios.c_cc[VEOL] = 0;
- termios.c_cc[VEOL2] = 0;
-
- termios.c_cc[VTIME] = 0;
- termios.c_cc[VMIN] = 1;
-
- if (tcsetattr(fd, TCSANOW, &termios) < 0)
- r = -errno;
-
-finish:
- /* Just in case, flush all crap out */
- tcflush(fd, TCIOFLUSH);
-
- return r;
-}
-
-int reset_terminal(const char *name) {
- _cleanup_close_ int fd = -1;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- return reset_terminal_fd(fd, true);
-}
-
-int open_terminal(const char *name, int mode) {
- int fd, r;
- unsigned c = 0;
-
- /*
- * If a TTY is in the process of being closed opening it might
- * cause EIO. This is horribly awful, but unlikely to be
- * changed in the kernel. Hence we work around this problem by
- * retrying a couple of times.
- *
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
- */
-
- assert(!(mode & O_CREAT));
-
- for (;;) {
- fd = open(name, mode, 0);
- if (fd >= 0)
- break;
-
- if (errno != EIO)
- return -errno;
-
- /* Max 1s in total */
- if (c >= 20)
- return -errno;
-
- usleep(50 * USEC_PER_MSEC);
- c++;
- }
-
- r = isatty(fd);
- if (r < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (!r) {
- safe_close(fd);
- return -ENOTTY;
- }
-
- return fd;
-}
-
int flush_fd(int fd) {
struct pollfd pollfd = {
.fd = fd,
}
}
-int acquire_terminal(
- const char *name,
- bool fail,
- bool force,
- bool ignore_tiocstty_eperm,
- usec_t timeout) {
-
- int fd = -1, notify = -1, r = 0, wd = -1;
- usec_t ts = 0;
-
- assert(name);
-
- /* We use inotify to be notified when the tty is closed. We
- * create the watch before checking if we can actually acquire
- * it, so that we don't lose any event.
- *
- * Note: strictly speaking this actually watches for the
- * device being closed, it does *not* really watch whether a
- * tty loses its controlling process. However, unless some
- * rogue process uses TIOCNOTTY on /dev/tty *after* closing
- * its tty otherwise this will not become a problem. As long
- * as the administrator makes sure not configure any service
- * on the same tty as an untrusted user this should not be a
- * problem. (Which he probably should not do anyway.) */
-
- if (timeout != USEC_INFINITY)
- ts = now(CLOCK_MONOTONIC);
-
- if (!fail && !force) {
- notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0));
- if (notify < 0) {
- r = -errno;
- goto fail;
- }
-
- wd = inotify_add_watch(notify, name, IN_CLOSE);
- if (wd < 0) {
- r = -errno;
- goto fail;
- }
- }
-
- for (;;) {
- struct sigaction sa_old, sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- if (notify >= 0) {
- r = flush_fd(notify);
- if (r < 0)
- goto fail;
- }
-
- /* We pass here O_NOCTTY only so that we can check the return
- * value TIOCSCTTY and have a reliable way to figure out if we
- * successfully became the controlling process of the tty */
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * if we already own the tty. */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- /* First, try to get the tty */
- if (ioctl(fd, TIOCSCTTY, force) < 0)
- r = -errno;
-
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
-
- /* Sometimes it makes sense to ignore TIOCSCTTY
- * returning EPERM, i.e. when very likely we already
- * are have this controlling terminal. */
- if (r < 0 && r == -EPERM && ignore_tiocstty_eperm)
- r = 0;
-
- if (r < 0 && (force || fail || r != -EPERM)) {
- goto fail;
- }
-
- if (r >= 0)
- break;
-
- assert(!fail);
- assert(!force);
- assert(notify >= 0);
-
- for (;;) {
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
-
- if (timeout != USEC_INFINITY) {
- usec_t n;
-
- n = now(CLOCK_MONOTONIC);
- if (ts + timeout < n) {
- r = -ETIMEDOUT;
- goto fail;
- }
-
- r = fd_wait_for_event(fd, POLLIN, ts + timeout - n);
- if (r < 0)
- goto fail;
-
- if (r == 0) {
- r = -ETIMEDOUT;
- goto fail;
- }
- }
-
- l = read(notify, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
-
- r = -errno;
- goto fail;
- }
-
- FOREACH_INOTIFY_EVENT(e, buffer, l) {
- if (e->wd != wd || !(e->mask & IN_CLOSE)) {
- r = -EIO;
- goto fail;
- }
- }
-
- break;
- }
-
- /* We close the tty fd here since if the old session
- * ended our handle will be dead. It's important that
- * we do this after sleeping, so that we don't enter
- * an endless loop. */
- fd = safe_close(fd);
- }
-
- safe_close(notify);
-
- r = reset_terminal_fd(fd, true);
- if (r < 0)
- log_warning_errno(r, "Failed to reset terminal: %m");
-
- return fd;
-
-fail:
- safe_close(fd);
- safe_close(notify);
-
- return r;
-}
-
-int release_terminal(void) {
- static const struct sigaction sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- _cleanup_close_ int fd = -1;
- struct sigaction sa_old;
- int r = 0;
-
- fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * by our own TIOCNOTTY */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- if (ioctl(fd, TIOCNOTTY) < 0)
- r = -errno;
-
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
-
- return r;
-}
-
int sigaction_many(const struct sigaction *sa, ...) {
va_list ap;
int r = 0, sig;
return 0;
}
-int make_stdio(int fd) {
- int r, s, t;
-
- assert(fd >= 0);
-
- r = dup2(fd, STDIN_FILENO);
- s = dup2(fd, STDOUT_FILENO);
- t = dup2(fd, STDERR_FILENO);
-
- if (fd >= 3)
- safe_close(fd);
-
- if (r < 0 || s < 0 || t < 0)
- return -errno;
-
- /* Explicitly unset O_CLOEXEC, since if fd was < 3, then
- * dup2() was a NOP and the bit hence possibly set. */
- fd_cloexec(STDIN_FILENO, false);
- fd_cloexec(STDOUT_FILENO, false);
- fd_cloexec(STDERR_FILENO, false);
-
- return 0;
-}
-
-int make_null_stdio(void) {
- int null_fd;
-
- null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
- if (null_fd < 0)
- return -errno;
-
- return make_stdio(null_fd);
-}
-
bool is_device_path(const char *path) {
/* Returns true on paths that refer to a device, either in
return strdup(u.sysname);
}
-bool hostname_is_set(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- return !isempty(u.nodename) && !streq(u.nodename, "(none)");
-}
-
-char *lookup_uid(uid_t uid) {
- long bufsize;
- char *name;
- _cleanup_free_ char *buf = NULL;
- struct passwd pwbuf, *pw = NULL;
-
- /* Shortcut things to avoid NSS lookups */
- if (uid == 0)
- return strdup("root");
-
- bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
- if (bufsize <= 0)
- bufsize = 4096;
-
- buf = malloc(bufsize);
- if (!buf)
- return NULL;
-
- if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
- return strdup(pw->pw_name);
-
- if (asprintf(&name, UID_FMT, uid) < 0)
- return NULL;
-
- return name;
-}
-
-char* getlogname_malloc(void) {
- uid_t uid;
- struct stat st;
-
- if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
- uid = st.st_uid;
- else
- uid = getuid();
-
- return lookup_uid(uid);
-}
-
-char *getusername_malloc(void) {
- const char *e;
-
- e = getenv("USER");
- if (e)
- return strdup(e);
-
- return lookup_uid(getuid());
-}
-
-int getttyname_malloc(int fd, char **ret) {
- size_t l = 100;
- int r;
-
- assert(fd >= 0);
- assert(ret);
-
- for (;;) {
- char path[l];
-
- r = ttyname_r(fd, path, sizeof(path));
- if (r == 0) {
- const char *p;
- char *c;
-
- p = startswith(path, "/dev/");
- c = strdup(p ?: path);
- if (!c)
- return -ENOMEM;
-
- *ret = c;
- return 0;
- }
-
- if (r != ERANGE)
- return -r;
-
- l *= 2;
- }
-
- return 0;
-}
-
-int getttyname_harder(int fd, char **r) {
- int k;
- char *s = NULL;
-
- k = getttyname_malloc(fd, &s);
- if (k < 0)
- return k;
-
- if (streq(s, "tty")) {
- free(s);
- return get_ctty(0, NULL, r);
- }
-
- *r = s;
- return 0;
-}
-
-int get_ctty_devnr(pid_t pid, dev_t *d) {
- int r;
- _cleanup_free_ char *line = NULL;
- const char *p;
- unsigned long ttynr;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "stat");
- r = read_one_line_file(p, &line);
- if (r < 0)
- return r;
-
- p = strrchr(line, ')');
- if (!p)
- return -EIO;
-
- p++;
+bool hostname_is_set(void) {
+ struct utsname u;
- if (sscanf(p, " "
- "%*c " /* state */
- "%*d " /* ppid */
- "%*d " /* pgrp */
- "%*d " /* session */
- "%lu ", /* ttynr */
- &ttynr) != 1)
- return -EIO;
+ assert_se(uname(&u) >= 0);
- if (major(ttynr) == 0 && minor(ttynr) == 0)
- return -ENOENT;
+ return !isempty(u.nodename) && !streq(u.nodename, "(none)");
+}
- if (d)
- *d = (dev_t) ttynr;
+char *lookup_uid(uid_t uid) {
+ long bufsize;
+ char *name;
+ _cleanup_free_ char *buf = NULL;
+ struct passwd pwbuf, *pw = NULL;
- return 0;
-}
+ /* Shortcut things to avoid NSS lookups */
+ if (uid == 0)
+ return strdup("root");
-int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
- char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL;
- _cleanup_free_ char *s = NULL;
- const char *p;
- dev_t devnr;
- int k;
+ bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+ if (bufsize <= 0)
+ bufsize = 4096;
- assert(r);
+ buf = malloc(bufsize);
+ if (!buf)
+ return NULL;
- k = get_ctty_devnr(pid, &devnr);
- if (k < 0)
- return k;
+ if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
+ return strdup(pw->pw_name);
- sprintf(fn, "/dev/char/%u:%u", major(devnr), minor(devnr));
+ if (asprintf(&name, UID_FMT, uid) < 0)
+ return NULL;
- k = readlink_malloc(fn, &s);
- if (k < 0) {
+ return name;
+}
- if (k != -ENOENT)
- return k;
+char* getlogname_malloc(void) {
+ uid_t uid;
+ struct stat st;
- /* This is an ugly hack */
- if (major(devnr) == 136) {
- if (asprintf(&b, "pts/%u", minor(devnr)) < 0)
- return -ENOMEM;
- } else {
- /* Probably something like the ptys which have no
- * symlink in /dev/char. Let's return something
- * vaguely useful. */
+ if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
+ uid = st.st_uid;
+ else
+ uid = getuid();
- b = strdup(fn + 5);
- if (!b)
- return -ENOMEM;
- }
- } else {
- if (startswith(s, "/dev/"))
- p = s + 5;
- else if (startswith(s, "../"))
- p = s + 3;
- else
- p = s;
+ return lookup_uid(uid);
+}
- b = strdup(p);
- if (!b)
- return -ENOMEM;
- }
+char *getusername_malloc(void) {
+ const char *e;
- *r = b;
- if (_devnr)
- *_devnr = devnr;
+ e = getenv("USER");
+ if (e)
+ return strdup(e);
- return 0;
+ return lookup_uid(getuid());
}
bool is_temporary_fs(const struct statfs *s) {
}
}
-int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
- static const char status_indent[] = " "; /* "[" STATUS "] " */
- _cleanup_free_ char *s = NULL;
- _cleanup_close_ int fd = -1;
- struct iovec iovec[6] = {};
- int n = 0;
- static bool prev_ephemeral;
-
- assert(format);
-
- /* This is independent of logging, as status messages are
- * optional and go exclusively to the console. */
-
- if (vasprintf(&s, format, ap) < 0)
- return log_oom();
-
- fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- if (ellipse) {
- char *e;
- size_t emax, sl;
- int c;
-
- c = fd_columns(fd);
- if (c <= 0)
- c = 80;
-
- sl = status ? sizeof(status_indent)-1 : 0;
-
- emax = c - sl - 1;
- if (emax < 3)
- emax = 3;
-
- e = ellipsize(s, emax, 50);
- if (e) {
- free(s);
- s = e;
- }
- }
-
- if (prev_ephemeral)
- IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
- prev_ephemeral = ephemeral;
-
- if (status) {
- if (!isempty(status)) {
- IOVEC_SET_STRING(iovec[n++], "[");
- IOVEC_SET_STRING(iovec[n++], status);
- IOVEC_SET_STRING(iovec[n++], "] ");
- } else
- IOVEC_SET_STRING(iovec[n++], status_indent);
- }
-
- IOVEC_SET_STRING(iovec[n++], s);
- if (!ephemeral)
- IOVEC_SET_STRING(iovec[n++], "\n");
-
- if (writev(fd, iovec, n) < 0)
- return -errno;
-
- return 0;
-}
-
-int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
- va_list ap;
- int r;
-
- assert(format);
-
- va_start(ap, format);
- r = status_vprintf(status, ellipse, ephemeral, format, ap);
- va_end(ap);
-
- return r;
-}
-
char *replace_env(const char *format, char **env) {
enum {
WORD,
return ret;
}
-int fd_columns(int fd) {
- struct winsize ws = {};
-
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
- return -errno;
-
- if (ws.ws_col <= 0)
- return -EIO;
-
- return ws.ws_col;
-}
-
-unsigned columns(void) {
- const char *e;
- int c;
-
- if (_likely_(cached_columns > 0))
- return cached_columns;
-
- c = 0;
- e = getenv("COLUMNS");
- if (e)
- (void) safe_atoi(e, &c);
-
- if (c <= 0)
- c = fd_columns(STDOUT_FILENO);
-
- if (c <= 0)
- c = 80;
-
- cached_columns = c;
- return cached_columns;
-}
-
-int fd_lines(int fd) {
- struct winsize ws = {};
-
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
- return -errno;
-
- if (ws.ws_row <= 0)
- return -EIO;
-
- return ws.ws_row;
-}
-
-unsigned lines(void) {
- const char *e;
- int l;
-
- if (_likely_(cached_lines > 0))
- return cached_lines;
-
- l = 0;
- e = getenv("LINES");
- if (e)
- (void) safe_atoi(e, &l);
-
- if (l <= 0)
- l = fd_lines(STDOUT_FILENO);
-
- if (l <= 0)
- l = 24;
-
- cached_lines = l;
- return cached_lines;
-}
-
-/* intended to be used as a SIGWINCH sighandler */
-void columns_lines_cache_reset(int signum) {
- cached_columns = 0;
- cached_lines = 0;
-}
-
-bool on_tty(void) {
- static int cached_on_tty = -1;
-
- if (_unlikely_(cached_on_tty < 0))
- cached_on_tty = isatty(STDOUT_FILENO) > 0;
-
- return cached_on_tty;
-}
-
int files_same(const char *filea, const char *fileb) {
struct stat a, b;
return strdup(p);
}
-bool tty_is_vc(const char *tty) {
- assert(tty);
-
- return vtnr_from_tty(tty) >= 0;
-}
-
-bool tty_is_console(const char *tty) {
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- return streq(tty, "console");
-}
-
-int vtnr_from_tty(const char *tty) {
- int i, r;
-
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- if (!startswith(tty, "tty") )
- return -EINVAL;
-
- if (tty[3] < '0' || tty[3] > '9')
- return -EINVAL;
-
- r = safe_atoi(tty+3, &i);
- if (r < 0)
- return r;
-
- if (i < 0 || i > 63)
- return -EINVAL;
-
- return i;
-}
-
-char *resolve_dev_console(char **active) {
- char *tty;
-
- /* Resolve where /dev/console is pointing to, if /sys is actually ours
- * (i.e. not read-only-mounted which is a sign for container setups) */
-
- if (path_is_read_only_fs("/sys") > 0)
- return NULL;
-
- if (read_one_line_file("/sys/class/tty/console/active", active) < 0)
- return NULL;
-
- /* If multiple log outputs are configured the last one is what
- * /dev/console points to */
- tty = strrchr(*active, ' ');
- if (tty)
- tty++;
- else
- tty = *active;
-
- if (streq(tty, "tty0")) {
- char *tmp;
-
- /* Get the active VC (e.g. tty1) */
- if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
- free(*active);
- tty = *active = tmp;
- }
- }
-
- return tty;
-}
-
-bool tty_is_vc_resolve(const char *tty) {
- _cleanup_free_ char *active = NULL;
-
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- if (streq(tty, "console")) {
- tty = resolve_dev_console(&active);
- if (!tty)
- return false;
- }
-
- return tty_is_vc(tty);
-}
-
-const char *default_term_for_tty(const char *tty) {
- assert(tty);
-
- return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt220";
-}
-
bool dirent_is_file(const struct dirent *de) {
assert(de);
return 0;
}
-int terminal_vhangup_fd(int fd) {
- assert(fd >= 0);
-
- if (ioctl(fd, TIOCVHANGUP) < 0)
- return -errno;
-
- return 0;
-}
-
-int terminal_vhangup(const char *name) {
- _cleanup_close_ int fd;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- return terminal_vhangup_fd(fd);
-}
-
-int vt_disallocate(const char *name) {
- int fd, r;
- unsigned u;
-
- /* Deallocate the VT if possible. If not possible
- * (i.e. because it is the active one), at least clear it
- * entirely (including the scrollback buffer) */
-
- if (!startswith(name, "/dev/"))
- return -EINVAL;
-
- if (!tty_is_vc(name)) {
- /* So this is not a VT. I guess we cannot deallocate
- * it then. But let's at least clear the screen */
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- loop_write(fd,
- "\033[r" /* clear scrolling region */
- "\033[H" /* move home */
- "\033[2J", /* clear screen */
- 10, false);
- safe_close(fd);
-
- return 0;
- }
-
- if (!startswith(name, "/dev/tty"))
- return -EINVAL;
-
- r = safe_atou(name+8, &u);
- if (r < 0)
- return r;
-
- if (u <= 0)
- return -EINVAL;
-
- /* Try to deallocate */
- fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- r = ioctl(fd, VT_DISALLOCATE, u);
- safe_close(fd);
-
- if (r >= 0)
- return 0;
-
- if (errno != EBUSY)
- return -errno;
-
- /* Couldn't deallocate, so let's clear it fully with
- * scrollback */
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- loop_write(fd,
- "\033[r" /* clear scrolling region */
- "\033[H" /* move home */
- "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
- 10, false);
- safe_close(fd);
-
- return 0;
-}
-
int symlink_atomic(const char *from, const char *to) {
_cleanup_free_ char *t = NULL;
int r;
return saved;
}
-void warn_melody(void) {
- _cleanup_close_ int fd = -1;
-
- fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- return;
-
- /* Yeah, this is synchronous. Kinda sucks. But well... */
-
- ioctl(fd, KIOCSOUND, (int)(1193180/440));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, (int)(1193180/220));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, (int)(1193180/220));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, 0);
-}
-
-int make_console_stdio(void) {
- int fd, r;
-
- /* Make /dev/console the controlling terminal and stdin/stdout/stderr */
-
- fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY);
- if (fd < 0)
- return log_error_errno(fd, "Failed to acquire terminal: %m");
-
- r = make_stdio(fd);
- if (r < 0)
- return log_error_errno(r, "Failed to duplicate terminal fd: %m");
-
- return 0;
-}
-
int get_home_dir(char **_h) {
struct passwd *p;
const char *e;
#define FORMAT_BYTES_MAX 8
-#define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
-#define ANSI_RED_ON "\x1B[31m"
-#define ANSI_HIGHLIGHT_RED_ON "\x1B[1;31m"
-#define ANSI_GREEN_ON "\x1B[32m"
-#define ANSI_HIGHLIGHT_GREEN_ON "\x1B[1;32m"
-#define ANSI_HIGHLIGHT_YELLOW_ON "\x1B[1;33m"
-#define ANSI_HIGHLIGHT_BLUE_ON "\x1B[1;34m"
-#define ANSI_HIGHLIGHT_OFF "\x1B[0m"
-#define ANSI_ERASE_TO_END_OF_LINE "\x1B[K"
-
size_t page_size(void) _pure_;
#define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
bool chars_intersect(const char *a, const char *b) _pure_;
-int make_stdio(int fd);
-int make_null_stdio(void);
-int make_console_stdio(void);
-
/* For basic lookup tables with strictly enumerated entries */
#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope) \
scope const char *name##_to_string(type i) { \
bool fstype_is_network(const char *fstype);
-int chvt(int vt);
-
-int read_one_char(FILE *f, char *ret, usec_t timeout, bool *need_nl);
-int ask_char(char *ret, const char *replies, const char *text, ...) _printf_(3, 4);
-int ask_string(char **ret, const char *text, ...) _printf_(2, 3);
-
-int reset_terminal_fd(int fd, bool switch_to_text);
-int reset_terminal(const char *name);
-
-int open_terminal(const char *name, int mode);
-int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm, usec_t timeout);
-int release_terminal(void);
-
int flush_fd(int fd);
int ignore_signals(int sig, ...);
char* getlogname_malloc(void);
char* getusername_malloc(void);
-int getttyname_malloc(int fd, char **r);
-int getttyname_harder(int fd, char **r);
-
-int get_ctty_devnr(pid_t pid, dev_t *d);
-int get_ctty(pid_t, dev_t *_devnr, char **r);
-
int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
cpu_set_t* cpu_set_malloc(unsigned *ncpus);
-int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) _printf_(4,0);
-int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) _printf_(4,5);
-
#define xsprintf(buf, fmt, ...) assert_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf))
-int fd_columns(int fd);
-unsigned columns(void);
-int fd_lines(int fd);
-unsigned lines(void);
-void columns_lines_cache_reset(int _unused_ signum);
-
-bool on_tty(void);
-
-static inline const char *ansi_highlight(void) {
- return on_tty() ? ANSI_HIGHLIGHT_ON : "";
-}
-
-static inline const char *ansi_highlight_red(void) {
- return on_tty() ? ANSI_HIGHLIGHT_RED_ON : "";
-}
-
-static inline const char *ansi_highlight_green(void) {
- return on_tty() ? ANSI_HIGHLIGHT_GREEN_ON : "";
-}
-
-static inline const char *ansi_highlight_yellow(void) {
- return on_tty() ? ANSI_HIGHLIGHT_YELLOW_ON : "";
-}
-
-static inline const char *ansi_highlight_blue(void) {
- return on_tty() ? ANSI_HIGHLIGHT_BLUE_ON : "";
-}
-
-static inline const char *ansi_highlight_off(void) {
- return on_tty() ? ANSI_HIGHLIGHT_OFF : "";
-}
-
int files_same(const char *filea, const char *fileb);
int running_in_chroot(void);
char *fstab_node_to_udev_node(const char *p);
-char *resolve_dev_console(char **active);
-bool tty_is_vc(const char *tty);
-bool tty_is_vc_resolve(const char *tty);
-bool tty_is_console(const char *tty) _pure_;
-int vtnr_from_tty(const char *tty);
-const char *default_term_for_tty(const char *tty);
-
void execute_directories(const char* const* directories, usec_t timeout, char *argv[]);
bool nulstr_contains(const char*nulstr, const char *needle);
char* strshorten(char *s, size_t l);
-int terminal_vhangup_fd(int fd);
-int terminal_vhangup(const char *name);
-
-int vt_disallocate(const char *name);
int symlink_atomic(const char *from, const char *to);
int mknod_atomic(const char *path, mode_t mode, dev_t dev);
bool in_initrd(void);
-void warn_melody(void);
-
int get_home_dir(char **ret);
int get_shell(char **_ret);
#include "macro.h"
#include "path-util.h"
#include "utmp-wtmp.h"
+#include "terminal-util.h"
int utmp_get_runlevel(int *runlevel, int *previous) {
struct utmpx *found, lookup = { .ut_type = RUN_LVL };
#include "util.h"
#include "macro.h"
#include "virt.h"
+#include "terminal-util.h"
static void test_get_process_comm(void) {
struct stat st;
--- /dev/null
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright 2013 Thomas H.P. Andersen
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <stdbool.h>
+
+#include "terminal-util.h"
+#include "macro.h"
+#include "util.h"
+#include "log.h"
+
+static void test_default_term_for_tty(void) {
+ puts(default_term_for_tty("/dev/tty23"));
+ puts(default_term_for_tty("/dev/ttyS23"));
+ puts(default_term_for_tty("/dev/tty0"));
+ puts(default_term_for_tty("/dev/pty0"));
+ puts(default_term_for_tty("/dev/pts/0"));
+ puts(default_term_for_tty("/dev/console"));
+ puts(default_term_for_tty("tty23"));
+ puts(default_term_for_tty("ttyS23"));
+ puts(default_term_for_tty("tty0"));
+ puts(default_term_for_tty("pty0"));
+ puts(default_term_for_tty("pts/0"));
+ puts(default_term_for_tty("console"));
+}
+
+static void test_read_one_char(void) {
+ _cleanup_fclose_ FILE *file = NULL;
+ char r;
+ bool need_nl;
+ char name[] = "/tmp/test-read_one_char.XXXXXX";
+ int fd;
+
+ fd = mkostemp_safe(name, O_RDWR|O_CLOEXEC);
+ assert_se(fd >= 0);
+ file = fdopen(fd, "r+");
+ assert_se(file);
+ assert_se(fputs("c\n", file) >= 0);
+ rewind(file);
+
+ assert_se(read_one_char(file, &r, 1000000, &need_nl) >= 0);
+ assert_se(!need_nl);
+ assert_se(r == 'c');
+ assert_se(read_one_char(file, &r, 1000000, &need_nl) < 0);
+
+ rewind(file);
+ assert_se(fputs("foobar\n", file) >= 0);
+ rewind(file);
+ assert_se(read_one_char(file, &r, 1000000, &need_nl) < 0);
+
+ rewind(file);
+ assert_se(fputs("\n", file) >= 0);
+ rewind(file);
+ assert_se(read_one_char(file, &r, 1000000, &need_nl) < 0);
+
+ unlink(name);
+}
+
+int main(int argc, char *argv[]) {
+ log_parse_environment();
+ log_open();
+
+ test_default_term_for_tty();
+ test_read_one_char();
+
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff