diff options
Diffstat (limited to 'src/3rd_party/dbus-1.7.8/tools/dbus-run-session.c')
| -rw-r--r-- | src/3rd_party/dbus-1.7.8/tools/dbus-run-session.c | 464 |
1 files changed, 0 insertions, 464 deletions
diff --git a/src/3rd_party/dbus-1.7.8/tools/dbus-run-session.c b/src/3rd_party/dbus-1.7.8/tools/dbus-run-session.c deleted file mode 100644 index 105ab3b4fe..0000000000 --- a/src/3rd_party/dbus-1.7.8/tools/dbus-run-session.c +++ /dev/null @@ -1,464 +0,0 @@ -/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ -/* dbus-run-session.c - run a child process in its own session - * - * Copyright © 2003-2006 Red Hat, Inc. - * Copyright © 2006 Thiago Macieira <thiago@kde.org> - * Copyright © 2011-2012 Nokia Corporation - * - * Licensed under the Academic Free License version 2.1 - * - * This program 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. - * - * This program 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 this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include <config.h> - -#include <assert.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include <sys/types.h> -#include <sys/wait.h> -#include <signal.h> - -#include "dbus/dbus.h" - -#define MAX_ADDR_LEN 512 -#define PIPE_READ_END 0 -#define PIPE_WRITE_END 1 - -/* PROCESSES - * - * If you are in a shell and run "dbus-run-session myapp", here is what - * happens (compare and contrast with dbus-launch): - * - * shell - * \- dbus-run-session myapp - * \- dbus-daemon --nofork --print-address --session - * \- myapp - * - * All processes are long-running. - * - * When myapp exits, dbus-run-session kills dbus-daemon and terminates. - * - * If dbus-daemon exits, dbus-run-session warns and continues to run. - * - * PIPES - * - * dbus-daemon --print-address -> bus_address_pipe -> d-r-s - */ - -static const char me[] = "dbus-run-session"; - -static void -usage (int ecode) -{ - fprintf (stderr, - "%s [OPTIONS] [--] PROGRAM [ARGUMENTS]\n" - "%s --version\n" - "%s --help\n" - "\n" - "Options:\n" - "--dbus-daemon=BINARY run BINARY instead of dbus-daemon\n" - "--config-file=FILENAME pass to dbus-daemon instead of --session\n" - "\n", - me, me, me); - exit (ecode); -} - -static void -version (void) -{ - printf ("%s %s\n" - "Copyright (C) 2003-2006 Red Hat, Inc.\n" - "Copyright (C) 2006 Thiago Macieira\n" - "Copyright © 2011-2012 Nokia Corporation\n" - "\n" - "This is free software; see the source for copying conditions.\n" - "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n", - me, VERSION); - exit (0); -} - -static void -oom (void) -{ - fprintf (stderr, "%s: out of memory\n", me); - exit (1); -} - -typedef enum -{ - READ_STATUS_OK, /**< Read succeeded */ - READ_STATUS_ERROR, /**< Some kind of error */ - READ_STATUS_EOF /**< EOF returned */ -} ReadStatus; - -static ReadStatus -read_line (int fd, - char *buf, - size_t maxlen) -{ - size_t bytes = 0; - ReadStatus retval; - - memset (buf, '\0', maxlen); - maxlen -= 1; /* ensure nul term */ - - retval = READ_STATUS_OK; - - while (1) - { - ssize_t chunk; - size_t to_read; - - again: - to_read = maxlen - bytes; - - if (to_read == 0) - break; - - chunk = read (fd, - buf + bytes, - to_read); - if (chunk < 0 && errno == EINTR) - goto again; - - if (chunk < 0) - { - retval = READ_STATUS_ERROR; - break; - } - else if (chunk == 0) - { - retval = READ_STATUS_EOF; - break; /* EOF */ - } - else /* chunk > 0 */ - bytes += chunk; - } - - if (retval == READ_STATUS_EOF && - bytes > 0) - retval = READ_STATUS_OK; - - /* whack newline */ - if (retval != READ_STATUS_ERROR && - bytes > 0 && - buf[bytes-1] == '\n') - buf[bytes-1] = '\0'; - - return retval; -} - -static void -exec_dbus_daemon (const char *dbus_daemon, - int bus_address_pipe[2], - const char *config_file) -{ - /* Child process, which execs dbus-daemon or dies trying */ -#define MAX_FD_LEN 64 - char write_address_fd_as_string[MAX_FD_LEN]; - - close (bus_address_pipe[PIPE_READ_END]); - - sprintf (write_address_fd_as_string, "%d", bus_address_pipe[PIPE_WRITE_END]); - - execlp (dbus_daemon, - dbus_daemon, - "--nofork", - "--print-address", write_address_fd_as_string, - config_file ? "--config-file" : "--session", - config_file, /* has to be last in this varargs list */ - NULL); - - fprintf (stderr, "%s: failed to execute message bus daemon '%s': %s\n", - me, dbus_daemon, strerror (errno)); -} - -static void -exec_app (int prog_arg, char **argv) -{ - execvp (argv[prog_arg], argv + prog_arg); - - fprintf (stderr, "%s: failed to exec '%s': %s\n", me, argv[prog_arg], - strerror (errno)); - exit (1); -} - -int -main (int argc, char **argv) -{ - int prog_arg = 0; - int bus_address_pipe[2] = { 0, 0 }; - const char *config_file = NULL; - const char *dbus_daemon = NULL; - char bus_address[MAX_ADDR_LEN] = { 0 }; - const char *prev_arg = NULL; - int i = 1; - int requires_arg = 0; - pid_t bus_pid; - pid_t app_pid; - - while (i < argc) - { - const char *arg = argv[i]; - - if (requires_arg) - { - const char **arg_dest; - - assert (prev_arg != NULL); - - if (strcmp (prev_arg, "--config-file") == 0) - { - arg_dest = &config_file; - } - else if (strcmp (prev_arg, "--dbus-daemon") == 0) - { - arg_dest = &dbus_daemon; - } - else - { - /* shouldn't happen */ - fprintf (stderr, "%s: internal error: %s not fully implemented\n", - me, prev_arg); - return 127; - } - - if (*arg_dest != NULL) - { - fprintf (stderr, "%s: %s given twice\n", me, prev_arg); - return 127; - } - - *arg_dest = arg; - requires_arg = 0; - prev_arg = arg; - ++i; - continue; - } - - if (strcmp (arg, "--help") == 0 || - strcmp (arg, "-h") == 0 || - strcmp (arg, "-?") == 0) - { - usage (0); - } - else if (strcmp (arg, "--version") == 0) - { - version (); - } - else if (strstr (arg, "--config-file=") == arg) - { - const char *file; - - if (config_file != NULL) - { - fprintf (stderr, "%s: --config-file given twice\n", me); - return 127; - } - - file = strchr (arg, '='); - ++file; - - config_file = file; - } - else if (strstr (arg, "--dbus-daemon=") == arg) - { - const char *file; - - if (dbus_daemon != NULL) - { - fprintf (stderr, "%s: --dbus-daemon given twice\n", me); - return 127; - } - - file = strchr (arg, '='); - ++file; - - dbus_daemon = file; - } - else if (strcmp (arg, "--config-file") == 0 || - strcmp (arg, "--dbus-daemon") == 0) - { - requires_arg = 1; - } - else if (arg[0] == '-') - { - if (strcmp (arg, "--") != 0) - { - fprintf (stderr, "%s: option '%s' is unknown\n", me, arg); - return 127; - } - else - { - prog_arg = i + 1; - break; - } - } - else - { - prog_arg = i; - break; - } - - prev_arg = arg; - ++i; - } - - /* "dbus-run-session" and "dbus-run-session ... --" are not allowed: - * there must be something to run */ - if (prog_arg < 1 || prog_arg >= argc) - { - fprintf (stderr, "%s: a non-option argument is required\n", me); - return 127; - } - - if (requires_arg) - { - fprintf (stderr, "%s: option '%s' requires an argument\n", me, prev_arg); - return 127; - } - - if (dbus_daemon == NULL) - dbus_daemon = "dbus-daemon"; - - if (pipe (bus_address_pipe) < 0) - { - fprintf (stderr, "%s: failed to create pipe: %s\n", me, strerror (errno)); - return 127; - } - - bus_pid = fork (); - - if (bus_pid < 0) - { - fprintf (stderr, "%s: failed to fork: %s\n", me, strerror (errno)); - return 127; - } - - if (bus_pid == 0) - { - /* child */ - exec_dbus_daemon (dbus_daemon, bus_address_pipe, config_file); - /* not reached */ - return 127; - } - - close (bus_address_pipe[PIPE_WRITE_END]); - - switch (read_line (bus_address_pipe[PIPE_READ_END], bus_address, MAX_ADDR_LEN)) - { - case READ_STATUS_OK: - break; - - case READ_STATUS_EOF: - fprintf (stderr, "%s: EOF reading address from bus daemon\n", me); - return 127; - break; - - case READ_STATUS_ERROR: - fprintf (stderr, "%s: error reading address from bus daemon: %s\n", - me, strerror (errno)); - return 127; - break; - } - - close (bus_address_pipe[PIPE_READ_END]); - - if (!dbus_setenv ("DBUS_SESSION_BUS_ADDRESS", bus_address) || - !dbus_setenv ("DBUS_SESSION_BUS_PID", NULL) || - !dbus_setenv ("DBUS_SESSION_BUS_WINDOWID", NULL) || - !dbus_setenv ("DBUS_STARTER_ADDRESS", NULL) || - !dbus_setenv ("DBUS_STARTER_BUS_TYPE", NULL)) - oom (); - - app_pid = fork (); - - if (app_pid < 0) - { - fprintf (stderr, "%s: failed to fork: %s\n", me, strerror (errno)); - return 127; - } - - if (app_pid == 0) - { - /* child */ - exec_app (prog_arg, argv); - /* not reached */ - return 127; - } - - while (1) - { - int child_status; - pid_t child_pid = waitpid (-1, &child_status, 0); - - if (child_pid == (pid_t) -1) - { - int errsv = errno; - - if (errsv == EINTR) - continue; - - /* shouldn't happen: the only other documented errors are ECHILD, - * which shouldn't happen because we terminate when all our children - * have died, and EINVAL, which would indicate programming error */ - fprintf (stderr, "%s: waitpid() failed: %s\n", me, strerror (errsv)); - return 127; - } - else if (child_pid == bus_pid) - { - /* no need to kill it, now */ - bus_pid = 0; - - if (WIFEXITED (child_status)) - fprintf (stderr, "%s: dbus-daemon exited with code %d\n", - me, WEXITSTATUS (child_status)); - else if (WIFSIGNALED (child_status)) - fprintf (stderr, "%s: dbus-daemon terminated by signal %d\n", - me, WTERMSIG (child_status)); - else - fprintf (stderr, "%s: dbus-daemon died or something\n", me); - } - else if (child_pid == app_pid) - { - if (bus_pid != 0) - kill (bus_pid, SIGTERM); - - if (WIFEXITED (child_status)) - return WEXITSTATUS (child_status); - - /* if it died from a signal, behave like sh(1) */ - if (WIFSIGNALED (child_status)) - return 128 + WTERMSIG (child_status); - - /* I give up (this should never be reached) */ - fprintf (stderr, "%s: child process died or something\n", me); - return 127; - } - else - { - fprintf (stderr, "%s: ignoring unknown child process %ld\n", me, - (long) child_pid); - } - } - - return 0; -} |