-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#include <assert.h>
#include <string.h>
#include <sys/utsname.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/poll.h>
#include "macro.h"
#include "utmp-wtmp.h"
return r;
}
-static void init_entry(struct utmpx *store, usec_t timestamp) {
- struct utsname uts;
-
+static void init_timestamp(struct utmpx *store, usec_t t) {
assert(store);
zero(*store);
- zero(uts);
- if (timestamp <= 0)
- timestamp = now(CLOCK_REALTIME);
+ if (t <= 0)
+ t = now(CLOCK_REALTIME);
- store->ut_tv.tv_sec = timestamp / USEC_PER_SEC;
- store->ut_tv.tv_usec = timestamp % USEC_PER_SEC;
+ store->ut_tv.tv_sec = t / USEC_PER_SEC;
+ store->ut_tv.tv_usec = t % USEC_PER_SEC;
+}
+
+static void init_entry(struct utmpx *store, usec_t t) {
+ struct utsname uts;
+
+ assert(store);
+
+ init_timestamp(store, t);
+
+ zero(uts);
if (uname(&uts) >= 0)
strncpy(store->ut_host, uts.release, sizeof(store->ut_host));
return r;
}
-int utmp_put_shutdown(usec_t timestamp) {
+int utmp_put_shutdown(usec_t t) {
struct utmpx store;
- init_entry(&store, timestamp);
+ init_entry(&store, t);
store.ut_type = RUN_LVL;
strncpy(store.ut_user, "shutdown", sizeof(store.ut_user));
return write_entry_both(&store);
}
-int utmp_put_reboot(usec_t timestamp) {
+int utmp_put_reboot(usec_t t) {
struct utmpx store;
- init_entry(&store, timestamp);
+ init_entry(&store, t);
store.ut_type = BOOT_TIME;
strncpy(store.ut_user, "reboot", sizeof(store.ut_user));
return write_entry_both(&store);
}
-int utmp_put_runlevel(usec_t timestamp, int runlevel, int previous) {
+static const char *sanitize_id(const char *id) {
+ size_t l;
+
+ assert(id);
+ l = strlen(id);
+
+ if (l <= sizeof(((struct utmpx*) NULL)->ut_id))
+ return id;
+
+ return id + l - sizeof(((struct utmpx*) NULL)->ut_id);
+}
+
+int utmp_put_init_process(usec_t t, const char *id, pid_t pid, pid_t sid, const char *line) {
+ struct utmpx store;
+
+ assert(id);
+
+ init_timestamp(&store, t);
+
+ store.ut_type = INIT_PROCESS;
+ store.ut_pid = pid;
+ store.ut_session = sid;
+
+ strncpy(store.ut_id, sanitize_id(id), sizeof(store.ut_id));
+
+ if (line)
+ strncpy(store.ut_line, file_name_from_path(line), sizeof(store.ut_line));
+
+ return write_entry_both(&store);
+}
+
+int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
+ struct utmpx lookup, store, *found;
+
+ assert(id);
+
+ setutxent();
+
+ zero(lookup);
+ lookup.ut_type = INIT_PROCESS; /* looks for DEAD_PROCESS, LOGIN_PROCESS, USER_PROCESS, too */
+ strncpy(lookup.ut_id, sanitize_id(id), sizeof(lookup.ut_id));
+
+ if (!(found = getutxid(&lookup)))
+ return 0;
+
+ if (found->ut_pid != pid)
+ return 0;
+
+ zero(store);
+
+ memcpy(&store, &lookup, sizeof(store));
+ store.ut_type = DEAD_PROCESS;
+ store.ut_exit.e_termination = code;
+ store.ut_exit.e_exit = status;
+
+ zero(store.ut_user);
+ zero(store.ut_host);
+ zero(store.ut_tv);
+
+ return write_entry_both(&store);
+}
+
+
+int utmp_put_runlevel(usec_t t, int runlevel, int previous) {
struct utmpx store;
int r;
previous = 0;
}
-
- if (previous == runlevel)
- return 0;
}
- init_entry(&store, timestamp);
+ if (previous == runlevel)
+ return 0;
+
+ init_entry(&store, t);
store.ut_type = RUN_LVL;
store.ut_pid = (runlevel & 0xFF) | ((previous & 0xFF) << 8);
return write_entry_both(&store);
}
+
+#define TIMEOUT_MSEC 50
+
+static int write_to_terminal(const char *tty, const char *message) {
+ int fd, r;
+ const char *p;
+ size_t left;
+ usec_t end;
+
+ assert(tty);
+ assert(message);
+
+ if ((fd = open(tty, O_WRONLY|O_NDELAY|O_NOCTTY|O_CLOEXEC)) < 0)
+ return -errno;
+
+ if (!isatty(fd)) {
+ r = -errno;
+ goto finish;
+ }
+
+ p = message;
+ left = strlen(message);
+
+ end = now(CLOCK_MONOTONIC) + TIMEOUT_MSEC*USEC_PER_MSEC;
+
+ while (left > 0) {
+ ssize_t n;
+ struct pollfd pollfd;
+ usec_t t;
+ int k;
+
+ t = now(CLOCK_MONOTONIC);
+
+ if (t >= end) {
+ r = -ETIME;
+ goto finish;
+ }
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLOUT;
+
+ if ((k = poll(&pollfd, 1, (end - t) / USEC_PER_MSEC)) < 0)
+ return -errno;
+
+ if (k <= 0) {
+ r = -ETIME;
+ goto finish;
+ }
+
+ if ((n = write(fd, p, left)) < 0) {
+
+ if (errno == EAGAIN)
+ continue;
+
+ r = -errno;
+ goto finish;
+ }
+
+ assert((size_t) n <= left);
+
+ p += n;
+ left -= n;
+ }
+
+ r = 0;
+
+finish:
+ close_nointr_nofail(fd);
+
+ return r;
+}
+
+int utmp_wall(const char *message) {
+ struct utmpx *u;
+ char date[FORMAT_TIMESTAMP_MAX];
+ char *text = NULL, *hn = NULL, *un = NULL, *tty = NULL;
+ int r;
+
+ if (!(hn = gethostname_malloc()) ||
+ !(un = getlogname_malloc())) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ getttyname_malloc(&tty);
+
+ if (asprintf(&text,
+ "\a\r\n"
+ "Broadcast message from %s@%s%s%s (%s):\r\n\r\n"
+ "%s\r\n\r\n",
+ un, hn,
+ tty ? " on " : "", strempty(tty),
+ format_timestamp(date, sizeof(date), now(CLOCK_REALTIME)),
+ message) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ setutxent();
+
+ r = 0;
+
+ while ((u = getutxent())) {
+ int q;
+ const char *path;
+ char *buf = NULL;
+
+ if (u->ut_type != USER_PROCESS || u->ut_user[0] == 0)
+ continue;
+
+ if (path_startswith(u->ut_line, "/dev/"))
+ path = u->ut_line;
+ else {
+ if (asprintf(&buf, "/dev/%s", u->ut_line) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ path = buf;
+ }
+
+ if ((q = write_to_terminal(path, text)) < 0)
+ r = q;
+
+ free(buf);
+ }
+
+finish:
+ free(hn);
+ free(un);
+ free(tty);
+ free(text);
+
+ return r;
+}
~ianmdlvl / elogind.git / blobdiff