+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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 General Public License as published by
- the Free Software Foundation; either version 2 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
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <assert.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/prctl.h>
-#include <linux/sched.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <grp.h>
-#include <pwd.h>
-#include <sys/mount.h>
-#include <linux/fs.h>
-#include <linux/oom.h>
-
-#ifdef HAVE_PAM
-#include <security/pam_appl.h>
-#endif
-
-#include "execute.h"
-#include "strv.h"
-#include "macro.h"
-#include "capability.h"
-#include "util.h"
-#include "log.h"
-#include "ioprio.h"
-#include "securebits.h"
-#include "cgroup.h"
-#include "namespace.h"
-#include "tcpwrap.h"
-#include "exit-status.h"
-#include "missing.h"
-#include "utmp-wtmp.h"
-#include "def.h"
-#include "loopback-setup.h"
-
-/* This assumes there is a 'tty' group */
-#define TTY_MODE 0620
-
-static int shift_fds(int fds[], unsigned n_fds) {
- int start, restart_from;
-
- if (n_fds <= 0)
- return 0;
-
- /* Modifies the fds array! (sorts it) */
-
- assert(fds);
-
- start = 0;
- for (;;) {
- int i;
-
- restart_from = -1;
-
- for (i = start; i < (int) n_fds; i++) {
- int nfd;
-
- /* Already at right index? */
- if (fds[i] == i+3)
- continue;
-
- if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0)
- return -errno;
-
- close_nointr_nofail(fds[i]);
- fds[i] = nfd;
-
- /* Hmm, the fd we wanted isn't free? Then
- * let's remember that and try again from here*/
- if (nfd != i+3 && restart_from < 0)
- restart_from = i;
- }
-
- if (restart_from < 0)
- break;
-
- start = restart_from;
- }
-
- return 0;
-}
-
-static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
- unsigned i;
- int r;
-
- if (n_fds <= 0)
- return 0;
-
- assert(fds);
-
- /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
-
- for (i = 0; i < n_fds; i++) {
-
- if ((r = fd_nonblock(fds[i], nonblock)) < 0)
- return r;
-
- /* We unconditionally drop FD_CLOEXEC from the fds,
- * since after all we want to pass these fds to our
- * children */
-
- if ((r = fd_cloexec(fds[i], false)) < 0)
- return r;
- }
-
- return 0;
-}
-
-static const char *tty_path(const ExecContext *context) {
- assert(context);
-
- if (context->tty_path)
- return context->tty_path;
-
- return "/dev/console";
-}
-
-void exec_context_tty_reset(const ExecContext *context) {
- assert(context);
-
- if (context->tty_vhangup)
- terminal_vhangup(tty_path(context));
-
- if (context->tty_reset)
- reset_terminal(tty_path(context));
-
- if (context->tty_vt_disallocate && context->tty_path)
- vt_disallocate(context->tty_path);
-}
-
-static int open_null_as(int flags, int nfd) {
- int fd, r;
-
- assert(nfd >= 0);
-
- if ((fd = open("/dev/null", flags|O_NOCTTY)) < 0)
- return -errno;
-
- if (fd != nfd) {
- r = dup2(fd, nfd) < 0 ? -errno : nfd;
- close_nointr_nofail(fd);
- } else
- r = nfd;
-
- return r;
-}
-
-static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, int nfd) {
- int fd, r;
- union sockaddr_union sa;
-
- assert(context);
- assert(output < _EXEC_OUTPUT_MAX);
- assert(ident);
- assert(nfd >= 0);
-
- fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if (fd < 0)
- return -errno;
-
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
-
- r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
- if (r < 0) {
- close_nointr_nofail(fd);
- return -errno;
- }
-
- if (shutdown(fd, SHUT_RD) < 0) {
- close_nointr_nofail(fd);
- return -errno;
- }
-
- dprintf(fd,
- "%s\n"
- "%i\n"
- "%i\n"
- "%i\n"
- "%i\n"
- "%i\n",
- context->syslog_identifier ? context->syslog_identifier : ident,
- context->syslog_priority,
- !!context->syslog_level_prefix,
- output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
- output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE,
- output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || output == EXEC_OUTPUT_KMSG_AND_CONSOLE || output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE);
-
- if (fd != nfd) {
- r = dup2(fd, nfd) < 0 ? -errno : nfd;
- close_nointr_nofail(fd);
- } else
- r = nfd;
-
- return r;
-}
-static int open_terminal_as(const char *path, mode_t mode, int nfd) {
- int fd, r;
-
- assert(path);
- assert(nfd >= 0);
-
- if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
- return fd;
-
- if (fd != nfd) {
- r = dup2(fd, nfd) < 0 ? -errno : nfd;
- close_nointr_nofail(fd);
- } else
- r = nfd;
-
- return r;
-}
-
-static bool is_terminal_input(ExecInput i) {
- return
- i == EXEC_INPUT_TTY ||
- i == EXEC_INPUT_TTY_FORCE ||
- i == EXEC_INPUT_TTY_FAIL;
-}
-
-static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) {
-
- if (is_terminal_input(std_input) && !apply_tty_stdin)
- return EXEC_INPUT_NULL;
-
- if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0)
- return EXEC_INPUT_NULL;
-
- return std_input;
-}
-
-static int fixup_output(ExecOutput std_output, int socket_fd) {
-
- if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0)
- return EXEC_OUTPUT_INHERIT;
-
- return std_output;
-}
-
-static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) {
- ExecInput i;
-
- assert(context);
-
- i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
-
- switch (i) {
-
- case EXEC_INPUT_NULL:
- return open_null_as(O_RDONLY, STDIN_FILENO);
-
- case EXEC_INPUT_TTY:
- case EXEC_INPUT_TTY_FORCE:
- case EXEC_INPUT_TTY_FAIL: {
- int fd, r;
-
- if ((fd = acquire_terminal(
- tty_path(context),
- i == EXEC_INPUT_TTY_FAIL,
- i == EXEC_INPUT_TTY_FORCE,
- false)) < 0)
- return fd;
-
- if (fd != STDIN_FILENO) {
- r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
- close_nointr_nofail(fd);
- } else
- r = STDIN_FILENO;
-
- return r;
- }
-
- case EXEC_INPUT_SOCKET:
- return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
-
- default:
- assert_not_reached("Unknown input type");
- }
-}
-
-static int setup_output(const ExecContext *context, int socket_fd, const char *ident, bool apply_tty_stdin) {
- ExecOutput o;
- ExecInput i;
-
- assert(context);
- assert(ident);
-
- i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
- o = fixup_output(context->std_output, socket_fd);
-
- /* This expects the input is already set up */
-
- switch (o) {
-
- case EXEC_OUTPUT_INHERIT:
-
- /* If input got downgraded, inherit the original value */
- if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input))
- return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
-
- /* If the input is connected to anything that's not a /dev/null, inherit that... */
- if (i != EXEC_INPUT_NULL)
- return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
-
- /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */
- if (getppid() != 1)
- return STDOUT_FILENO;
-
- /* We need to open /dev/null here anew, to get the
- * right access mode. So we fall through */
-
- case EXEC_OUTPUT_NULL:
- return open_null_as(O_WRONLY, STDOUT_FILENO);
-
- case EXEC_OUTPUT_TTY:
- if (is_terminal_input(i))
- return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
-
- /* We don't reset the terminal if this is just about output */
- return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
-
- case EXEC_OUTPUT_SYSLOG:
- case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
- case EXEC_OUTPUT_KMSG:
- case EXEC_OUTPUT_KMSG_AND_CONSOLE:
- case EXEC_OUTPUT_JOURNAL:
- case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
- return connect_logger_as(context, o, ident, STDOUT_FILENO);
-
- case EXEC_OUTPUT_SOCKET:
- assert(socket_fd >= 0);
- return dup2(socket_fd, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
-
- default:
- assert_not_reached("Unknown output type");
- }
-}
-
-static int setup_error(const ExecContext *context, int socket_fd, const char *ident, bool apply_tty_stdin) {
- ExecOutput o, e;
- ExecInput i;
-
- assert(context);
- assert(ident);
-
- i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
- o = fixup_output(context->std_output, socket_fd);
- e = fixup_output(context->std_error, socket_fd);
-
- /* This expects the input and output are already set up */
-
- /* Don't change the stderr file descriptor if we inherit all
- * the way and are not on a tty */
- if (e == EXEC_OUTPUT_INHERIT &&
- o == EXEC_OUTPUT_INHERIT &&
- i == EXEC_INPUT_NULL &&
- !is_terminal_input(context->std_input) &&
- getppid () != 1)
- return STDERR_FILENO;
-
- /* Duplicate from stdout if possible */
- if (e == o || e == EXEC_OUTPUT_INHERIT)
- return dup2(STDOUT_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
-
- switch (e) {
-
- case EXEC_OUTPUT_NULL:
- return open_null_as(O_WRONLY, STDERR_FILENO);
-
- case EXEC_OUTPUT_TTY:
- if (is_terminal_input(i))
- return dup2(STDIN_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
-
- /* We don't reset the terminal if this is just about output */
- return open_terminal_as(tty_path(context), O_WRONLY, STDERR_FILENO);
-
- case EXEC_OUTPUT_SYSLOG:
- case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
- case EXEC_OUTPUT_KMSG:
- case EXEC_OUTPUT_KMSG_AND_CONSOLE:
- case EXEC_OUTPUT_JOURNAL:
- case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
- return connect_logger_as(context, e, ident, STDERR_FILENO);
-
- case EXEC_OUTPUT_SOCKET:
- assert(socket_fd >= 0);
- return dup2(socket_fd, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
-
- default:
- assert_not_reached("Unknown error type");
- }
-}
-
-static int chown_terminal(int fd, uid_t uid) {
- struct stat st;
-
- assert(fd >= 0);
-
- /* This might fail. What matters are the results. */
- (void) fchown(fd, uid, -1);
- (void) fchmod(fd, TTY_MODE);
-
- if (fstat(fd, &st) < 0)
- return -errno;
-
- if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE)
- return -EPERM;
-
- return 0;
-}
-
-static int setup_confirm_stdio(const ExecContext *context,
- int *_saved_stdin,
- int *_saved_stdout) {
- int fd = -1, saved_stdin, saved_stdout = -1, r;
-
- assert(context);
- assert(_saved_stdin);
- assert(_saved_stdout);
-
- /* This returns positive EXIT_xxx return values instead of
- * negative errno style values! */
-
- if ((saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3)) < 0)
- return EXIT_STDIN;
-
- if ((saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3)) < 0) {
- r = EXIT_STDOUT;
- goto fail;
- }
-
- if ((fd = acquire_terminal(
- tty_path(context),
- context->std_input == EXEC_INPUT_TTY_FAIL,
- context->std_input == EXEC_INPUT_TTY_FORCE,
- false)) < 0) {
- r = EXIT_STDIN;
- goto fail;
- }
-
- if (chown_terminal(fd, getuid()) < 0) {
- r = EXIT_STDIN;
- goto fail;
- }
-
- if (dup2(fd, STDIN_FILENO) < 0) {
- r = EXIT_STDIN;
- goto fail;
- }
-
- if (dup2(fd, STDOUT_FILENO) < 0) {
- r = EXIT_STDOUT;
- goto fail;
- }
-
- if (fd >= 2)
- close_nointr_nofail(fd);
-
- *_saved_stdin = saved_stdin;
- *_saved_stdout = saved_stdout;
-
- return 0;
-
-fail:
- if (saved_stdout >= 0)
- close_nointr_nofail(saved_stdout);
-
- if (saved_stdin >= 0)
- close_nointr_nofail(saved_stdin);
-
- if (fd >= 0)
- close_nointr_nofail(fd);
-
- return r;
-}
-
-static int restore_confirm_stdio(const ExecContext *context,
- int *saved_stdin,
- int *saved_stdout,
- bool *keep_stdin,
- bool *keep_stdout) {
-
- assert(context);
- assert(saved_stdin);
- assert(*saved_stdin >= 0);
- assert(saved_stdout);
- assert(*saved_stdout >= 0);
-
- /* This returns positive EXIT_xxx return values instead of
- * negative errno style values! */
-
- if (is_terminal_input(context->std_input)) {
-
- /* The service wants terminal input. */
-
- *keep_stdin = true;
- *keep_stdout =
- context->std_output == EXEC_OUTPUT_INHERIT ||
- context->std_output == EXEC_OUTPUT_TTY;
-
- } else {
- /* If the service doesn't want a controlling terminal,
- * then we need to get rid entirely of what we have
- * already. */
-
- if (release_terminal() < 0)
- return EXIT_STDIN;
-
- if (dup2(*saved_stdin, STDIN_FILENO) < 0)
- return EXIT_STDIN;
-
- if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
- return EXIT_STDOUT;
-
- *keep_stdout = *keep_stdin = false;
- }
-
- return 0;
-}
-
-static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
- bool keep_groups = false;
- int r;
-
- assert(context);
-
- /* Lookup and set GID and supplementary group list. Here too
- * we avoid NSS lookups for gid=0. */
-
- if (context->group || username) {
-
- if (context->group) {
- const char *g = context->group;
-
- if ((r = get_group_creds(&g, &gid)) < 0)
- return r;
- }
-
- /* First step, initialize groups from /etc/groups */
- if (username && gid != 0) {
- if (initgroups(username, gid) < 0)
- return -errno;
-
- keep_groups = true;
- }
-
- /* Second step, set our gids */
- if (setresgid(gid, gid, gid) < 0)
- return -errno;
- }
-
- if (context->supplementary_groups) {
- int ngroups_max, k;
- gid_t *gids;
- char **i;
-
- /* Final step, initialize any manually set supplementary groups */
- assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0);
-
- if (!(gids = new(gid_t, ngroups_max)))
- return -ENOMEM;
-
- if (keep_groups) {
- if ((k = getgroups(ngroups_max, gids)) < 0) {
- free(gids);
- return -errno;
- }
- } else
- k = 0;
-
- STRV_FOREACH(i, context->supplementary_groups) {
- const char *g;
-
- if (k >= ngroups_max) {
- free(gids);
- return -E2BIG;
- }
-
- g = *i;
- r = get_group_creds(&g, gids+k);
- if (r < 0) {
- free(gids);
- return r;
- }
-
- k++;
- }
-
- if (setgroups(k, gids) < 0) {
- free(gids);
- return -errno;
- }
-
- free(gids);
- }
-
- return 0;
-}
-
-static int enforce_user(const ExecContext *context, uid_t uid) {
- int r;
- assert(context);
-
- /* Sets (but doesn't lookup) the uid and make sure we keep the
- * capabilities while doing so. */
-
- if (context->capabilities) {
- cap_t d;
- static const cap_value_t bits[] = {
- CAP_SETUID, /* Necessary so that we can run setresuid() below */
- CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
- };
-
- /* First step: If we need to keep capabilities but
- * drop privileges we need to make sure we keep our
- * caps, whiel we drop privileges. */
- if (uid != 0) {
- int sb = context->secure_bits|SECURE_KEEP_CAPS;
-
- if (prctl(PR_GET_SECUREBITS) != sb)
- if (prctl(PR_SET_SECUREBITS, sb) < 0)
- return -errno;
- }
-
- /* Second step: set the capabilities. This will reduce
- * the capabilities to the minimum we need. */
-
- if (!(d = cap_dup(context->capabilities)))
- return -errno;
-
- if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
- cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) {
- r = -errno;
- cap_free(d);
- return r;
- }
-
- if (cap_set_proc(d) < 0) {
- r = -errno;
- cap_free(d);
- return r;
- }
-
- cap_free(d);
- }
-
- /* Third step: actually set the uids */
- if (setresuid(uid, uid, uid) < 0)
- return -errno;
-
- /* At this point we should have all necessary capabilities but
- are otherwise a normal user. However, the caps might got
- corrupted due to the setresuid() so we need clean them up
- later. This is done outside of this call. */
-
- return 0;
-}
-
-#ifdef HAVE_PAM
-
-static int null_conv(
- int num_msg,
- const struct pam_message **msg,
- struct pam_response **resp,
- void *appdata_ptr) {
-
- /* We don't support conversations */
-
- return PAM_CONV_ERR;
-}
-
-static int setup_pam(
- const char *name,
- const char *user,
- const char *tty,
- char ***pam_env,
- int fds[], unsigned n_fds) {
-
- static const struct pam_conv conv = {
- .conv = null_conv,
- .appdata_ptr = NULL
- };
-
- pam_handle_t *handle = NULL;
- sigset_t ss, old_ss;
- int pam_code = PAM_SUCCESS;
- int err;
- char **e = NULL;
- bool close_session = false;
- pid_t pam_pid = 0, parent_pid;
-
- assert(name);
- assert(user);
- assert(pam_env);
-
- /* We set up PAM in the parent process, then fork. The child
- * will then stay around until killed via PR_GET_PDEATHSIG or
- * systemd via the cgroup logic. It will then remove the PAM
- * session again. The parent process will exec() the actual
- * daemon. We do things this way to ensure that the main PID
- * of the daemon is the one we initially fork()ed. */
-
- if ((pam_code = pam_start(name, user, &conv, &handle)) != PAM_SUCCESS) {
- handle = NULL;
- goto fail;
- }
-
- if (tty)
- if ((pam_code = pam_set_item(handle, PAM_TTY, tty)) != PAM_SUCCESS)
- goto fail;
-
- if ((pam_code = pam_acct_mgmt(handle, PAM_SILENT)) != PAM_SUCCESS)
- goto fail;
-
- if ((pam_code = pam_open_session(handle, PAM_SILENT)) != PAM_SUCCESS)
- goto fail;
-
- close_session = true;
-
- if ((!(e = pam_getenvlist(handle)))) {
- pam_code = PAM_BUF_ERR;
- goto fail;
- }
-
- /* Block SIGTERM, so that we know that it won't get lost in
- * the child */
- if (sigemptyset(&ss) < 0 ||
- sigaddset(&ss, SIGTERM) < 0 ||
- sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0)
- goto fail;
-
- parent_pid = getpid();
-
- if ((pam_pid = fork()) < 0)
- goto fail;
-
- if (pam_pid == 0) {
- int sig;
- int r = EXIT_PAM;
-
- /* The child's job is to reset the PAM session on
- * termination */
-
- /* This string must fit in 10 chars (i.e. the length
- * of "/sbin/init"), to look pretty in /bin/ps */
- rename_process("(sd-pam)");
-
- /* Make sure we don't keep open the passed fds in this
- child. We assume that otherwise only those fds are
- open here that have been opened by PAM. */
- close_many(fds, n_fds);
-
- /* Wait until our parent died. This will most likely
- * not work since the kernel does not allow
- * unprivileged parents kill their privileged children
- * this way. We rely on the control groups kill logic
- * to do the rest for us. */
- if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
- goto child_finish;
-
- /* Check if our parent process might already have
- * died? */
- if (getppid() == parent_pid) {
- for (;;) {
- if (sigwait(&ss, &sig) < 0) {
- if (errno == EINTR)
- continue;
-
- goto child_finish;
- }
-
- assert(sig == SIGTERM);
- break;
- }
- }
-
- /* If our parent died we'll end the session */
- if (getppid() != parent_pid)
- if ((pam_code = pam_close_session(handle, PAM_DATA_SILENT)) != PAM_SUCCESS)
- goto child_finish;
-
- r = 0;
-
- child_finish:
- pam_end(handle, pam_code | PAM_DATA_SILENT);
- _exit(r);
- }
-
- /* If the child was forked off successfully it will do all the
- * cleanups, so forget about the handle here. */
- handle = NULL;
-
- /* Unblock SIGTERM again in the parent */
- if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0)
- goto fail;
-
- /* We close the log explicitly here, since the PAM modules
- * might have opened it, but we don't want this fd around. */
- closelog();
-
- *pam_env = e;
- e = NULL;
-
- return 0;
-
-fail:
- if (pam_code != PAM_SUCCESS)
- err = -EPERM; /* PAM errors do not map to errno */
- else
- err = -errno;
-
- if (handle) {
- if (close_session)
- pam_code = pam_close_session(handle, PAM_DATA_SILENT);
-
- pam_end(handle, pam_code | PAM_DATA_SILENT);
- }
-
- strv_free(e);
-
- closelog();
-
- if (pam_pid > 1) {
- kill(pam_pid, SIGTERM);
- kill(pam_pid, SIGCONT);
- }
-
- return err;
-}
-#endif
-
-static int do_capability_bounding_set_drop(uint64_t drop) {
- unsigned long i;
- cap_t old_cap = NULL, new_cap = NULL;
- cap_flag_value_t fv;
- int r;
-
- /* If we are run as PID 1 we will lack CAP_SETPCAP by default
- * in the effective set (yes, the kernel drops that when
- * executing init!), so get it back temporarily so that we can
- * call PR_CAPBSET_DROP. */
-
- old_cap = cap_get_proc();
- if (!old_cap)
- return -errno;
-
- if (cap_get_flag(old_cap, CAP_SETPCAP, CAP_EFFECTIVE, &fv) < 0) {
- r = -errno;
- goto finish;
- }
-
- if (fv != CAP_SET) {
- static const cap_value_t v = CAP_SETPCAP;
-
- new_cap = cap_dup(old_cap);
- if (!new_cap) {
- r = -errno;
- goto finish;
- }
-
- if (cap_set_flag(new_cap, CAP_EFFECTIVE, 1, &v, CAP_SET) < 0) {
- r = -errno;
- goto finish;
- }
-
- if (cap_set_proc(new_cap) < 0) {
- r = -errno;
- goto finish;
- }
- }
-
- for (i = 0; i <= cap_last_cap(); i++)
- if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
- if (prctl(PR_CAPBSET_DROP, i) < 0) {
- r = -errno;
- goto finish;
- }
- }
-
- r = 0;
-
-finish:
- if (new_cap)
- cap_free(new_cap);
-
- if (old_cap) {
- cap_set_proc(old_cap);
- cap_free(old_cap);
- }
-
- return r;
-}
-
-static void rename_process_from_path(const char *path) {
- char process_name[11];
- const char *p;
- size_t l;
-
- /* This resulting string must fit in 10 chars (i.e. the length
- * of "/sbin/init") to look pretty in /bin/ps */
-
- p = file_name_from_path(path);
- if (isempty(p)) {
- rename_process("(...)");
- return;
- }
-
- l = strlen(p);
- if (l > 8) {
- /* The end of the process name is usually more
- * interesting, since the first bit might just be
- * "systemd-" */
- p = p + l - 8;
- l = 8;
- }
-
- process_name[0] = '(';
- memcpy(process_name+1, p, l);
- process_name[1+l] = ')';
- process_name[1+l+1] = 0;
-
- rename_process(process_name);
-}
-
-int exec_spawn(ExecCommand *command,
- char **argv,
- const ExecContext *context,
- int fds[], unsigned n_fds,
- char **environment,
- bool apply_permissions,
- bool apply_chroot,
- bool apply_tty_stdin,
- bool confirm_spawn,
- CGroupBonding *cgroup_bondings,
- CGroupAttribute *cgroup_attributes,
- pid_t *ret) {
-
- pid_t pid;
- int r;
- char *line;
- int socket_fd;
- char **files_env = NULL;
-
- assert(command);
- assert(context);
- assert(ret);
- assert(fds || n_fds <= 0);
-
- if (context->std_input == EXEC_INPUT_SOCKET ||
- context->std_output == EXEC_OUTPUT_SOCKET ||
- context->std_error == EXEC_OUTPUT_SOCKET) {
-
- if (n_fds != 1)
- return -EINVAL;
-
- socket_fd = fds[0];
-
- fds = NULL;
- n_fds = 0;
- } else
- socket_fd = -1;
-
- if ((r = exec_context_load_environment(context, &files_env)) < 0) {
- log_error("Failed to load environment files: %s", strerror(-r));
- return r;
- }
-
- if (!argv)
- argv = command->argv;
-
- if (!(line = exec_command_line(argv))) {
- r = -ENOMEM;
- goto fail_parent;
- }
-
- log_debug("About to execute: %s", line);
- free(line);
-
- r = cgroup_bonding_realize_list(cgroup_bondings);
- if (r < 0)
- goto fail_parent;
-
- cgroup_attribute_apply_list(cgroup_attributes, cgroup_bondings);
-
- if ((pid = fork()) < 0) {
- r = -errno;
- goto fail_parent;
- }
-
- if (pid == 0) {
- int i, err;
- sigset_t ss;
- const char *username = NULL, *home = NULL;
- uid_t uid = (uid_t) -1;
- gid_t gid = (gid_t) -1;
- char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
- unsigned n_env = 0;
- int saved_stdout = -1, saved_stdin = -1;
- bool keep_stdout = false, keep_stdin = false, set_access = false;
-
- /* child */
-
- rename_process_from_path(command->path);
-
- /* We reset exactly these signals, since they are the
- * only ones we set to SIG_IGN in the main daemon. All
- * others we leave untouched because we set them to
- * SIG_DFL or a valid handler initially, both of which
- * will be demoted to SIG_DFL. */
- default_signals(SIGNALS_CRASH_HANDLER,
- SIGNALS_IGNORE, -1);
-
- if (context->ignore_sigpipe)
- ignore_signals(SIGPIPE, -1);
-
- assert_se(sigemptyset(&ss) == 0);
- if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
- err = -errno;
- r = EXIT_SIGNAL_MASK;
- goto fail_child;
- }
-
- /* Close sockets very early to make sure we don't
- * block init reexecution because it cannot bind its
- * sockets */
- log_forget_fds();
- err = close_all_fds(socket_fd >= 0 ? &socket_fd : fds,
- socket_fd >= 0 ? 1 : n_fds);
- if (err < 0) {
- r = EXIT_FDS;
- goto fail_child;
- }
-
- if (!context->same_pgrp)
- if (setsid() < 0) {
- err = -errno;
- r = EXIT_SETSID;
- goto fail_child;
- }
-
- if (context->tcpwrap_name) {
- if (socket_fd >= 0)
- if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
- err = -EACCES;
- r = EXIT_TCPWRAP;
- goto fail_child;
- }
-
- for (i = 0; i < (int) n_fds; i++) {
- if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
- err = -EACCES;
- r = EXIT_TCPWRAP;
- goto fail_child;
- }
- }
- }
-
- exec_context_tty_reset(context);
-
- /* We skip the confirmation step if we shall not apply the TTY */
- if (confirm_spawn &&
- (!is_terminal_input(context->std_input) || apply_tty_stdin)) {
- char response;
-
- /* Set up terminal for the question */
- if ((r = setup_confirm_stdio(context,
- &saved_stdin, &saved_stdout))) {
- err = -errno;
- goto fail_child;
- }
-
- /* Now ask the question. */
- if (!(line = exec_command_line(argv))) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
- free(line);
-
- if (r < 0 || response == 'n') {
- err = -ECANCELED;
- r = EXIT_CONFIRM;
- goto fail_child;
- } else if (response == 's') {
- err = r = 0;
- goto fail_child;
- }
-
- /* Release terminal for the question */
- if ((r = restore_confirm_stdio(context,
- &saved_stdin, &saved_stdout,
- &keep_stdin, &keep_stdout))) {
- err = -errno;
- goto fail_child;
- }
- }
-
- /* If a socket is connected to STDIN/STDOUT/STDERR, we
- * must sure to drop O_NONBLOCK */
- if (socket_fd >= 0)
- fd_nonblock(socket_fd, false);
-
- if (!keep_stdin) {
- err = setup_input(context, socket_fd, apply_tty_stdin);
- if (err < 0) {
- r = EXIT_STDIN;
- goto fail_child;
- }
- }
-
- if (!keep_stdout) {
- err = setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin);
- if (err < 0) {
- r = EXIT_STDOUT;
- goto fail_child;
- }
- }
-
- err = setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin);
- if (err < 0) {
- r = EXIT_STDERR;
- goto fail_child;
- }
-
- if (cgroup_bondings) {
- err = cgroup_bonding_install_list(cgroup_bondings, 0);
- if (err < 0) {
- r = EXIT_CGROUP;
- goto fail_child;
- }
- }
-
- if (context->oom_score_adjust_set) {
- char t[16];
-
- snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
- char_array_0(t);
-
- if (write_one_line_file("/proc/self/oom_score_adj", t) < 0) {
- /* Compatibility with Linux <= 2.6.35 */
-
- int adj;
-
- adj = (context->oom_score_adjust * -OOM_DISABLE) / OOM_SCORE_ADJ_MAX;
- adj = CLAMP(adj, OOM_DISABLE, OOM_ADJUST_MAX);
-
- snprintf(t, sizeof(t), "%i", adj);
- char_array_0(t);
-
- if (write_one_line_file("/proc/self/oom_adj", t) < 0
- && errno != EACCES) {
- err = -errno;
- r = EXIT_OOM_ADJUST;
- goto fail_child;
- }
- }
- }
-
- if (context->nice_set)
- if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
- err = -errno;
- r = EXIT_NICE;
- goto fail_child;
- }
-
- if (context->cpu_sched_set) {
- struct sched_param param;
-
- zero(param);
- param.sched_priority = context->cpu_sched_priority;
-
- if (sched_setscheduler(0, context->cpu_sched_policy |
- (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
- err = -errno;
- r = EXIT_SETSCHEDULER;
- goto fail_child;
- }
- }
-
- if (context->cpuset)
- if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
- err = -errno;
- r = EXIT_CPUAFFINITY;
- goto fail_child;
- }
-
- if (context->ioprio_set)
- if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
- err = -errno;
- r = EXIT_IOPRIO;
- goto fail_child;
- }
-
- if (context->timer_slack_nsec_set)
- if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
- err = -errno;
- r = EXIT_TIMERSLACK;
- goto fail_child;
- }
-
- if (context->utmp_id)
- utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path);
-
- if (context->user) {
- username = context->user;
- err = get_user_creds(&username, &uid, &gid, &home);
- if (err < 0) {
- r = EXIT_USER;
- goto fail_child;
- }
-
- if (is_terminal_input(context->std_input)) {
- err = chown_terminal(STDIN_FILENO, uid);
- if (err < 0) {
- r = EXIT_STDIN;
- goto fail_child;
- }
- }
-
- if (cgroup_bondings && context->control_group_modify) {
- err = cgroup_bonding_set_group_access_list(cgroup_bondings, 0755, uid, gid);
- if (err >= 0)
- err = cgroup_bonding_set_task_access_list(cgroup_bondings, 0644, uid, gid, context->control_group_persistent);
- if (err < 0) {
- r = EXIT_CGROUP;
- goto fail_child;
- }
-
- set_access = true;
- }
- }
-
- if (cgroup_bondings && !set_access && context->control_group_persistent >= 0) {
- err = cgroup_bonding_set_task_access_list(cgroup_bondings, (mode_t) -1, (uid_t) -1, (uid_t) -1, context->control_group_persistent);
- if (err < 0) {
- r = EXIT_CGROUP;
- goto fail_child;
- }
- }
-
- if (apply_permissions) {
- err = enforce_groups(context, username, gid);
- if (err < 0) {
- r = EXIT_GROUP;
- goto fail_child;
- }
- }
-
- umask(context->umask);
-
-#ifdef HAVE_PAM
- if (context->pam_name && username) {
- err = setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds);
- if (err < 0) {
- r = EXIT_PAM;
- goto fail_child;
- }
- }
-#endif
- if (context->private_network) {
- if (unshare(CLONE_NEWNET) < 0) {
- err = -errno;
- r = EXIT_NETWORK;
- goto fail_child;
- }
-
- loopback_setup();
- }
-
- if (strv_length(context->read_write_dirs) > 0 ||
- strv_length(context->read_only_dirs) > 0 ||
- strv_length(context->inaccessible_dirs) > 0 ||
- context->mount_flags != MS_SHARED ||
- context->private_tmp) {
- err = setup_namespace(context->read_write_dirs,
- context->read_only_dirs,
- context->inaccessible_dirs,
- context->private_tmp,
- context->mount_flags);
- if (err < 0) {
- r = EXIT_NAMESPACE;
- goto fail_child;
- }
- }
-
- if (apply_chroot) {
- if (context->root_directory)
- if (chroot(context->root_directory) < 0) {
- err = -errno;
- r = EXIT_CHROOT;
- goto fail_child;
- }
-
- if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
- err = -errno;
- r = EXIT_CHDIR;
- goto fail_child;
- }
- } else {
-
- char *d;
-
- if (asprintf(&d, "%s/%s",
- context->root_directory ? context->root_directory : "",
- context->working_directory ? context->working_directory : "") < 0) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (chdir(d) < 0) {
- err = -errno;
- free(d);
- r = EXIT_CHDIR;
- goto fail_child;
- }
-
- free(d);
- }
-
- /* We repeat the fd closing here, to make sure that
- * nothing is leaked from the PAM modules */
- err = close_all_fds(fds, n_fds);
- if (err >= 0)
- err = shift_fds(fds, n_fds);
- if (err >= 0)
- err = flags_fds(fds, n_fds, context->non_blocking);
- if (err < 0) {
- r = EXIT_FDS;
- goto fail_child;
- }
-
- if (apply_permissions) {
-
- for (i = 0; i < RLIMIT_NLIMITS; i++) {
- if (!context->rlimit[i])
- continue;
-
- if (setrlimit(i, context->rlimit[i]) < 0) {
- err = -errno;
- r = EXIT_LIMITS;
- goto fail_child;
- }
- }
-
- if (context->capability_bounding_set_drop) {
- err = do_capability_bounding_set_drop(context->capability_bounding_set_drop);
- if (err < 0) {
- r = EXIT_CAPABILITIES;
- goto fail_child;
- }
- }
-
- if (context->user) {
- err = enforce_user(context, uid);
- if (err < 0) {
- r = EXIT_USER;
- goto fail_child;
- }
- }
-
- /* PR_GET_SECUREBITS is not privileged, while
- * PR_SET_SECUREBITS is. So to suppress
- * potential EPERMs we'll try not to call
- * PR_SET_SECUREBITS unless necessary. */
- if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
- if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
- err = -errno;
- r = EXIT_SECUREBITS;
- goto fail_child;
- }
-
- if (context->capabilities)
- if (cap_set_proc(context->capabilities) < 0) {
- err = -errno;
- r = EXIT_CAPABILITIES;
- goto fail_child;
- }
- }
-
- if (!(our_env = new0(char*, 7))) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (n_fds > 0)
- if (asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
- asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (home)
- if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (username)
- if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
- asprintf(our_env + n_env++, "USER=%s", username) < 0) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (is_terminal_input(context->std_input) ||
- context->std_output == EXEC_OUTPUT_TTY ||
- context->std_error == EXEC_OUTPUT_TTY)
- if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- assert(n_env <= 7);
-
- if (!(final_env = strv_env_merge(
- 5,
- environment,
- our_env,
- context->environment,
- files_env,
- pam_env,
- NULL))) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- if (!(final_argv = replace_env_argv(argv, final_env))) {
- err = -ENOMEM;
- r = EXIT_MEMORY;
- goto fail_child;
- }
-
- final_env = strv_env_clean(final_env);
-
- execve(command->path, final_argv, final_env);
- err = -errno;
- r = EXIT_EXEC;
-
- fail_child:
- if (r != 0) {
- log_open();
- log_warning("Failed at step %s spawning %s: %s",
- exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
- command->path, strerror(-err));
- }
-
- strv_free(our_env);
- strv_free(final_env);
- strv_free(pam_env);
- strv_free(files_env);
- strv_free(final_argv);
-
- if (saved_stdin >= 0)
- close_nointr_nofail(saved_stdin);
-
- if (saved_stdout >= 0)
- close_nointr_nofail(saved_stdout);
-
- _exit(r);
- }
-
- strv_free(files_env);
-
- /* We add the new process to the cgroup both in the child (so
- * that we can be sure that no user code is ever executed
- * outside of the cgroup) and in the parent (so that we can be
- * sure that when we kill the cgroup the process will be
- * killed too). */
- if (cgroup_bondings)
- cgroup_bonding_install_list(cgroup_bondings, pid);
-
- log_debug("Forked %s as %lu", command->path, (unsigned long) pid);
-
- exec_status_start(&command->exec_status, pid);
-
- *ret = pid;
- return 0;
-
-fail_parent:
- strv_free(files_env);
-
- return r;
-}
-
-void exec_context_init(ExecContext *c) {
- assert(c);
-
- c->umask = 0022;
- c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
- c->cpu_sched_policy = SCHED_OTHER;
- c->syslog_priority = LOG_DAEMON|LOG_INFO;
- c->syslog_level_prefix = true;
- c->mount_flags = MS_SHARED;
- c->kill_signal = SIGTERM;
- c->send_sigkill = true;
- c->control_group_persistent = -1;
- c->ignore_sigpipe = true;
-}
-
-void exec_context_done(ExecContext *c) {
- unsigned l;
-
- assert(c);
-
- strv_free(c->environment);
- c->environment = NULL;
-
- strv_free(c->environment_files);
- c->environment_files = NULL;
-
- for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
- free(c->rlimit[l]);
- c->rlimit[l] = NULL;
- }
-
- free(c->working_directory);
- c->working_directory = NULL;
- free(c->root_directory);
- c->root_directory = NULL;
-
- free(c->tty_path);
- c->tty_path = NULL;
-
- free(c->tcpwrap_name);
- c->tcpwrap_name = NULL;
-
- free(c->syslog_identifier);
- c->syslog_identifier = NULL;
-
- free(c->user);
- c->user = NULL;
-
- free(c->group);
- c->group = NULL;
-
- strv_free(c->supplementary_groups);
- c->supplementary_groups = NULL;
-
- free(c->pam_name);
- c->pam_name = NULL;
-
- if (c->capabilities) {
- cap_free(c->capabilities);
- c->capabilities = NULL;
- }
-
- strv_free(c->read_only_dirs);
- c->read_only_dirs = NULL;
-
- strv_free(c->read_write_dirs);
- c->read_write_dirs = NULL;
-
- strv_free(c->inaccessible_dirs);
- c->inaccessible_dirs = NULL;
-
- if (c->cpuset)
- CPU_FREE(c->cpuset);
-
- free(c->utmp_id);
- c->utmp_id = NULL;
-}
-
-void exec_command_done(ExecCommand *c) {
- assert(c);
-
- free(c->path);
- c->path = NULL;
-
- strv_free(c->argv);
- c->argv = NULL;
-}
-
-void exec_command_done_array(ExecCommand *c, unsigned n) {
- unsigned i;
-
- for (i = 0; i < n; i++)
- exec_command_done(c+i);
-}
-
-void exec_command_free_list(ExecCommand *c) {
- ExecCommand *i;
-
- while ((i = c)) {
- LIST_REMOVE(ExecCommand, command, c, i);
- exec_command_done(i);
- free(i);
- }
-}
-
-void exec_command_free_array(ExecCommand **c, unsigned n) {
- unsigned i;
-
- for (i = 0; i < n; i++) {
- exec_command_free_list(c[i]);
- c[i] = NULL;
- }
-}
-
-int exec_context_load_environment(const ExecContext *c, char ***l) {
- char **i, **r = NULL;
-
- assert(c);
- assert(l);
-
- STRV_FOREACH(i, c->environment_files) {
- char *fn;
- int k;
- bool ignore = false;
- char **p;
-
- fn = *i;
-
- if (fn[0] == '-') {
- ignore = true;
- fn ++;
- }
-
- if (!path_is_absolute(fn)) {
-
- if (ignore)
- continue;
-
- strv_free(r);
- return -EINVAL;
- }
-
- if ((k = load_env_file(fn, &p)) < 0) {
-
- if (ignore)
- continue;
-
- strv_free(r);
- return k;
- }
-
- if (r == NULL)
- r = p;
- else {
- char **m;
-
- m = strv_env_merge(2, r, p);
- strv_free(r);
- strv_free(p);
-
- if (!m)
- return -ENOMEM;
-
- r = m;
- }
- }
-
- *l = r;
-
- return 0;
-}
-
-static void strv_fprintf(FILE *f, char **l) {
- char **g;
-
- assert(f);
-
- STRV_FOREACH(g, l)
- fprintf(f, " %s", *g);
-}
-
-void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
- char ** e;
- unsigned i;
-
- assert(c);
- assert(f);
-
- if (!prefix)
- prefix = "";
-
- fprintf(f,
- "%sUMask: %04o\n"
- "%sWorkingDirectory: %s\n"
- "%sRootDirectory: %s\n"
- "%sNonBlocking: %s\n"
- "%sPrivateTmp: %s\n"
- "%sControlGroupModify: %s\n"
- "%sControlGroupPersistent: %s\n"
- "%sPrivateNetwork: %s\n",
- prefix, c->umask,
- prefix, c->working_directory ? c->working_directory : "/",
- prefix, c->root_directory ? c->root_directory : "/",
- prefix, yes_no(c->non_blocking),
- prefix, yes_no(c->private_tmp),
- prefix, yes_no(c->control_group_modify),
- prefix, yes_no(c->control_group_persistent),
- prefix, yes_no(c->private_network));
-
- STRV_FOREACH(e, c->environment)
- fprintf(f, "%sEnvironment: %s\n", prefix, *e);
-
- STRV_FOREACH(e, c->environment_files)
- fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
-
- if (c->tcpwrap_name)
- fprintf(f,
- "%sTCPWrapName: %s\n",
- prefix, c->tcpwrap_name);
-
- if (c->nice_set)
- fprintf(f,
- "%sNice: %i\n",
- prefix, c->nice);
-
- if (c->oom_score_adjust_set)
- fprintf(f,
- "%sOOMScoreAdjust: %i\n",
- prefix, c->oom_score_adjust);
-
- for (i = 0; i < RLIM_NLIMITS; i++)
- if (c->rlimit[i])
- fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
-
- if (c->ioprio_set)
- fprintf(f,
- "%sIOSchedulingClass: %s\n"
- "%sIOPriority: %i\n",
- prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
- prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
-
- if (c->cpu_sched_set)
- fprintf(f,
- "%sCPUSchedulingPolicy: %s\n"
- "%sCPUSchedulingPriority: %i\n"
- "%sCPUSchedulingResetOnFork: %s\n",
- prefix, sched_policy_to_string(c->cpu_sched_policy),
- prefix, c->cpu_sched_priority,
- prefix, yes_no(c->cpu_sched_reset_on_fork));
-
- if (c->cpuset) {
- fprintf(f, "%sCPUAffinity:", prefix);
- for (i = 0; i < c->cpuset_ncpus; i++)
- if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset))
- fprintf(f, " %i", i);
- fputs("\n", f);
- }
-
- if (c->timer_slack_nsec_set)
- fprintf(f, "%sTimerSlackNSec: %lu\n", prefix, c->timer_slack_nsec);
-
- fprintf(f,
- "%sStandardInput: %s\n"
- "%sStandardOutput: %s\n"
- "%sStandardError: %s\n",
- prefix, exec_input_to_string(c->std_input),
- prefix, exec_output_to_string(c->std_output),
- prefix, exec_output_to_string(c->std_error));
-
- if (c->tty_path)
- fprintf(f,
- "%sTTYPath: %s\n"
- "%sTTYReset: %s\n"
- "%sTTYVHangup: %s\n"
- "%sTTYVTDisallocate: %s\n",
- prefix, c->tty_path,
- prefix, yes_no(c->tty_reset),
- prefix, yes_no(c->tty_vhangup),
- prefix, yes_no(c->tty_vt_disallocate));
-
- if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG || c->std_output == EXEC_OUTPUT_JOURNAL ||
- c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE ||
- c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG || c->std_error == EXEC_OUTPUT_JOURNAL ||
- c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE)
- fprintf(f,
- "%sSyslogFacility: %s\n"
- "%sSyslogLevel: %s\n",
- prefix, log_facility_unshifted_to_string(c->syslog_priority >> 3),
- prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
-
- if (c->capabilities) {
- char *t;
- if ((t = cap_to_text(c->capabilities, NULL))) {
- fprintf(f, "%sCapabilities: %s\n",
- prefix, t);
- cap_free(t);
- }
- }
-
- if (c->secure_bits)
- fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
- prefix,
- (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
- (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
- (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
- (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
- (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
- (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
-
- if (c->capability_bounding_set_drop) {
- unsigned long l;
- fprintf(f, "%sCapabilityBoundingSet:", prefix);
-
- for (l = 0; l <= cap_last_cap(); l++)
- if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
- char *t;
-
- if ((t = cap_to_name(l))) {
- fprintf(f, " %s", t);
- cap_free(t);
- }
- }
-
- fputs("\n", f);
- }
-
- if (c->user)
- fprintf(f, "%sUser: %s\n", prefix, c->user);
- if (c->group)
- fprintf(f, "%sGroup: %s\n", prefix, c->group);
-
- if (strv_length(c->supplementary_groups) > 0) {
- fprintf(f, "%sSupplementaryGroups:", prefix);
- strv_fprintf(f, c->supplementary_groups);
- fputs("\n", f);
- }
-
- if (c->pam_name)
- fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name);
-
- if (strv_length(c->read_write_dirs) > 0) {
- fprintf(f, "%sReadWriteDirs:", prefix);
- strv_fprintf(f, c->read_write_dirs);
- fputs("\n", f);
- }
-
- if (strv_length(c->read_only_dirs) > 0) {
- fprintf(f, "%sReadOnlyDirs:", prefix);
- strv_fprintf(f, c->read_only_dirs);
- fputs("\n", f);
- }
-
- if (strv_length(c->inaccessible_dirs) > 0) {
- fprintf(f, "%sInaccessibleDirs:", prefix);
- strv_fprintf(f, c->inaccessible_dirs);
- fputs("\n", f);
- }
-
- fprintf(f,
- "%sKillMode: %s\n"
- "%sKillSignal: SIG%s\n"
- "%sSendSIGKILL: %s\n"
- "%sIgnoreSIGPIPE: %s\n",
- prefix, kill_mode_to_string(c->kill_mode),
- prefix, signal_to_string(c->kill_signal),
- prefix, yes_no(c->send_sigkill),
- prefix, yes_no(c->ignore_sigpipe));
-
- if (c->utmp_id)
- fprintf(f,
- "%sUtmpIdentifier: %s\n",
- prefix, c->utmp_id);
-}
-
-void exec_status_start(ExecStatus *s, pid_t pid) {
- assert(s);
-
- zero(*s);
- s->pid = pid;
- dual_timestamp_get(&s->start_timestamp);
-}
-
-void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
- assert(s);
-
- if (s->pid && s->pid != pid)
- zero(*s);
-
- s->pid = pid;
- dual_timestamp_get(&s->exit_timestamp);
-
- s->code = code;
- s->status = status;
-
- if (context) {
- if (context->utmp_id)
- utmp_put_dead_process(context->utmp_id, pid, code, status);
-
- exec_context_tty_reset(context);
- }
-}
-
-void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
- char buf[FORMAT_TIMESTAMP_MAX];
-
- assert(s);
- assert(f);
-
- if (!prefix)
- prefix = "";
-
- if (s->pid <= 0)
- return;
-
- fprintf(f,
- "%sPID: %lu\n",
- prefix, (unsigned long) s->pid);
-
- if (s->start_timestamp.realtime > 0)
- fprintf(f,
- "%sStart Timestamp: %s\n",
- prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime));
-
- if (s->exit_timestamp.realtime > 0)
- fprintf(f,
- "%sExit Timestamp: %s\n"
- "%sExit Code: %s\n"
- "%sExit Status: %i\n",
- prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime),
- prefix, sigchld_code_to_string(s->code),
- prefix, s->status);
-}
-
-char *exec_command_line(char **argv) {
- size_t k;
- char *n, *p, **a;
- bool first = true;
-
- assert(argv);
-
- k = 1;
- STRV_FOREACH(a, argv)
- k += strlen(*a)+3;
-
- if (!(n = new(char, k)))
- return NULL;
-
- p = n;
- STRV_FOREACH(a, argv) {
-
- if (!first)
- *(p++) = ' ';
- else
- first = false;
-
- if (strpbrk(*a, WHITESPACE)) {
- *(p++) = '\'';
- p = stpcpy(p, *a);
- *(p++) = '\'';
- } else
- p = stpcpy(p, *a);
-
- }
-
- *p = 0;
-
- /* FIXME: this doesn't really handle arguments that have
- * spaces and ticks in them */
-
- return n;
-}
-
-void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
- char *p2;
- const char *prefix2;
-
- char *cmd;
-
- assert(c);
- assert(f);
-
- if (!prefix)
- prefix = "";
- p2 = strappend(prefix, "\t");
- prefix2 = p2 ? p2 : prefix;
-
- cmd = exec_command_line(c->argv);
-
- fprintf(f,
- "%sCommand Line: %s\n",
- prefix, cmd ? cmd : strerror(ENOMEM));
-
- free(cmd);
-
- exec_status_dump(&c->exec_status, f, prefix2);
-
- free(p2);
-}
-
-void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
- assert(f);
-
- if (!prefix)
- prefix = "";
-
- LIST_FOREACH(command, c, c)
- exec_command_dump(c, f, prefix);
-}
-
-void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
- ExecCommand *end;
-
- assert(l);
- assert(e);
-
- if (*l) {
- /* It's kind of important, that we keep the order here */
- LIST_FIND_TAIL(ExecCommand, command, *l, end);
- LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
- } else
- *l = e;
-}
-
-int exec_command_set(ExecCommand *c, const char *path, ...) {
- va_list ap;
- char **l, *p;
-
- assert(c);
- assert(path);
-
- va_start(ap, path);
- l = strv_new_ap(path, ap);
- va_end(ap);
-
- if (!l)
- return -ENOMEM;
-
- if (!(p = strdup(path))) {
- strv_free(l);
- return -ENOMEM;
- }
-
- free(c->path);
- c->path = p;
-
- strv_free(c->argv);
- c->argv = l;
-
- return 0;
-}
-
-static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
- [EXEC_INPUT_NULL] = "null",
- [EXEC_INPUT_TTY] = "tty",
- [EXEC_INPUT_TTY_FORCE] = "tty-force",
- [EXEC_INPUT_TTY_FAIL] = "tty-fail",
- [EXEC_INPUT_SOCKET] = "socket"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
-
-static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
- [EXEC_OUTPUT_INHERIT] = "inherit",
- [EXEC_OUTPUT_NULL] = "null",
- [EXEC_OUTPUT_TTY] = "tty",
- [EXEC_OUTPUT_SYSLOG] = "syslog",
- [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
- [EXEC_OUTPUT_KMSG] = "kmsg",
- [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
- [EXEC_OUTPUT_JOURNAL] = "journal",
- [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console",
- [EXEC_OUTPUT_SOCKET] = "socket"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
-
-static const char* const kill_mode_table[_KILL_MODE_MAX] = {
- [KILL_CONTROL_GROUP] = "control-group",
- [KILL_PROCESS] = "process",
- [KILL_NONE] = "none"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
-
-static const char* const kill_who_table[_KILL_WHO_MAX] = {
- [KILL_MAIN] = "main",
- [KILL_CONTROL] = "control",
- [KILL_ALL] = "all"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);
~ianmdlvl / elogind.git / blobdiff