X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fexecute.c;h=ee05e994450de54375aec6229097790fdcc7d840;hp=d6f09e26fea39c9519fe5cd13a485553f44e516c;hb=b925e72633bf98438f56a140520e07ec8c959e46;hpb=35b8ca3aaf8cb044ad76675dfcad89e000dd4a5c diff --git a/src/execute.c b/src/execute.c index d6f09e26f..ee05e9944 100644 --- a/src/execute.c +++ b/src/execute.c @@ -894,8 +894,10 @@ fail: closelog(); - if (pam_pid > 1) + if (pam_pid > 1) { kill(pam_pid, SIGTERM); + kill(pam_pid, SIGCONT); + } return EXIT_PAM; } @@ -917,6 +919,7 @@ int exec_spawn(ExecCommand *command, int r; char *line; int socket_fd; + char **files_env = NULL; assert(command); assert(context); @@ -937,21 +940,30 @@ int exec_spawn(ExecCommand *command, } 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))) - return -ENOMEM; + if (!(line = exec_command_line(argv))) { + r = -ENOMEM; + goto fail_parent; + } log_debug("About to execute: %s", line); free(line); if (cgroup_bondings) if ((r = cgroup_bonding_realize_list(cgroup_bondings))) - return r; + goto fail_parent; - if ((pid = fork()) < 0) - return -errno; + if ((pid = fork()) < 0) { + r = -errno; + goto fail_parent; + } if (pid == 0) { int i; @@ -981,7 +993,7 @@ int exec_spawn(ExecCommand *command, if (sigemptyset(&ss) < 0 || sigprocmask(SIG_SETMASK, &ss, NULL) < 0) { r = EXIT_SIGNAL_MASK; - goto fail; + goto fail_child; } /* Close sockets very early to make sure we don't @@ -990,26 +1002,26 @@ int exec_spawn(ExecCommand *command, if (close_all_fds(socket_fd >= 0 ? &socket_fd : fds, socket_fd >= 0 ? 1 : n_fds) < 0) { r = EXIT_FDS; - goto fail; + goto fail_child; } if (!context->same_pgrp) if (setsid() < 0) { r = EXIT_SETSID; - goto fail; + goto fail_child; } if (context->tcpwrap_name) { if (socket_fd >= 0) if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) { r = EXIT_TCPWRAP; - goto fail; + goto fail_child; } for (i = 0; i < (int) n_fds; i++) { if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) { r = EXIT_TCPWRAP; - goto fail; + goto fail_child; } } } @@ -1022,12 +1034,12 @@ int exec_spawn(ExecCommand *command, /* Set up terminal for the question */ if ((r = setup_confirm_stdio(context, &saved_stdin, &saved_stdout))) - goto fail; + goto fail_child; /* Now ask the question. */ if (!(line = exec_command_line(argv))) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line); @@ -1035,17 +1047,17 @@ int exec_spawn(ExecCommand *command, if (r < 0 || response == 'n') { r = EXIT_CONFIRM; - goto fail; + goto fail_child; } else if (response == 's') { r = 0; - goto fail; + goto fail_child; } /* Release terminal for the question */ if ((r = restore_confirm_stdio(context, &saved_stdin, &saved_stdout, &keep_stdin, &keep_stdout))) - goto fail; + goto fail_child; } /* If a socket is connected to STDIN/STDOUT/STDERR, we @@ -1056,24 +1068,24 @@ int exec_spawn(ExecCommand *command, if (!keep_stdin) if (setup_input(context, socket_fd, apply_tty_stdin) < 0) { r = EXIT_STDIN; - goto fail; + goto fail_child; } if (!keep_stdout) if (setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) { r = EXIT_STDOUT; - goto fail; + goto fail_child; } if (setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) { r = EXIT_STDERR; - goto fail; + goto fail_child; } if (cgroup_bondings) if (cgroup_bonding_install_list(cgroup_bondings, 0) < 0) { r = EXIT_CGROUP; - goto fail; + goto fail_child; } if (context->oom_score_adjust_set) { @@ -1095,7 +1107,7 @@ int exec_spawn(ExecCommand *command, if (write_one_line_file("/proc/self/oom_adj", t) < 0) { r = EXIT_OOM_ADJUST; - goto fail; + goto fail_child; } } } @@ -1103,7 +1115,7 @@ int exec_spawn(ExecCommand *command, if (context->nice_set) if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) { r = EXIT_NICE; - goto fail; + goto fail_child; } if (context->cpu_sched_set) { @@ -1115,26 +1127,26 @@ int exec_spawn(ExecCommand *command, if (sched_setscheduler(0, context->cpu_sched_policy | (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) { r = EXIT_SETSCHEDULER; - goto fail; + goto fail_child; } } if (context->cpuset) if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) { r = EXIT_CPUAFFINITY; - goto fail; + goto fail_child; } if (context->ioprio_set) if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) { r = EXIT_IOPRIO; - goto fail; + goto fail_child; } if (context->timer_slack_nsec_set) if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) { r = EXIT_TIMERSLACK; - goto fail; + goto fail_child; } if (context->utmp_id) @@ -1144,13 +1156,13 @@ int exec_spawn(ExecCommand *command, username = context->user; if (get_user_creds(&username, &uid, &gid, &home) < 0) { r = EXIT_USER; - goto fail; + goto fail_child; } if (is_terminal_input(context->std_input)) if (chown_terminal(STDIN_FILENO, uid) < 0) { r = EXIT_STDIN; - goto fail; + goto fail_child; } } @@ -1158,7 +1170,7 @@ int exec_spawn(ExecCommand *command, if (context->pam_name && username) { if (setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds) < 0) { r = EXIT_PAM; - goto fail; + goto fail_child; } } #endif @@ -1166,7 +1178,7 @@ int exec_spawn(ExecCommand *command, if (apply_permissions) if (enforce_groups(context, username, uid) < 0) { r = EXIT_GROUP; - goto fail; + goto fail_child; } umask(context->umask); @@ -1182,18 +1194,18 @@ int exec_spawn(ExecCommand *command, context->inaccessible_dirs, context->private_tmp, context->mount_flags)) < 0) - goto fail; + goto fail_child; if (apply_chroot) { if (context->root_directory) if (chroot(context->root_directory) < 0) { r = EXIT_CHROOT; - goto fail; + goto fail_child; } if (chdir(context->working_directory ? context->working_directory : "/") < 0) { r = EXIT_CHDIR; - goto fail; + goto fail_child; } } else { @@ -1203,13 +1215,13 @@ int exec_spawn(ExecCommand *command, context->root_directory ? context->root_directory : "", context->working_directory ? context->working_directory : "") < 0) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } if (chdir(d) < 0) { free(d); r = EXIT_CHDIR; - goto fail; + goto fail_child; } free(d); @@ -1221,7 +1233,7 @@ int exec_spawn(ExecCommand *command, shift_fds(fds, n_fds) < 0 || flags_fds(fds, n_fds, context->non_blocking) < 0) { r = EXIT_FDS; - goto fail; + goto fail_child; } if (apply_permissions) { @@ -1232,14 +1244,14 @@ int exec_spawn(ExecCommand *command, if (setrlimit(i, context->rlimit[i]) < 0) { r = EXIT_LIMITS; - goto fail; + goto fail_child; } } if (context->user) if (enforce_user(context, uid) < 0) { r = EXIT_USER; - goto fail; + goto fail_child; } /* PR_GET_SECUREBITS is not privileged, while @@ -1249,39 +1261,39 @@ int exec_spawn(ExecCommand *command, if (prctl(PR_GET_SECUREBITS) != context->secure_bits) if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) { r = EXIT_SECUREBITS; - goto fail; + goto fail_child; } if (context->capabilities) if (cap_set_proc(context->capabilities) < 0) { r = EXIT_CAPABILITIES; - goto fail; + goto fail_child; } } if (!(our_env = new0(char*, 7))) { r = EXIT_MEMORY; - goto fail; + 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) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } if (home) if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } if (username) if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 || asprintf(our_env + n_env++, "USER=%s", username) < 0) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } if (is_terminal_input(context->std_input) || @@ -1289,25 +1301,26 @@ int exec_spawn(ExecCommand *command, context->std_error == EXEC_OUTPUT_TTY) if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } assert(n_env <= 7); if (!(final_env = strv_env_merge( - 4, + 5, environment, our_env, context->environment, + files_env, pam_env, NULL))) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } if (!(final_argv = replace_env_argv(argv, final_env))) { r = EXIT_MEMORY; - goto fail; + goto fail_child; } final_env = strv_env_clean(final_env); @@ -1315,10 +1328,11 @@ int exec_spawn(ExecCommand *command, execve(command->path, final_argv, final_env); r = EXIT_EXEC; - fail: + fail_child: strv_free(our_env); strv_free(final_env); strv_free(pam_env); + strv_free(files_env); strv_free(final_argv); if (saved_stdin >= 0) @@ -1330,6 +1344,8 @@ int exec_spawn(ExecCommand *command, _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 @@ -1344,6 +1360,11 @@ int exec_spawn(ExecCommand *command, *ret = pid; return 0; + +fail_parent: + strv_free(files_env); + + return r; } void exec_context_init(ExecContext *c) { @@ -1367,6 +1388,9 @@ void exec_context_done(ExecContext *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; @@ -1455,6 +1479,64 @@ void exec_command_free_array(ExecCommand **c, unsigned n) { } } +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; @@ -1486,9 +1568,11 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) { prefix, yes_no(c->non_blocking), prefix, yes_no(c->private_tmp)); - if (c->environment) - for (e = c->environment; *e; e++) - fprintf(f, "%sEnvironment: %s\n", prefix, *e); + 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,