Update docs for start_stop_daemon to match reality. Update
the reality a bit to better match debian behavior.
This commit is contained in:
Eric Andersen
parent
55c704c119
commit
63a1a7aaa5
@ -23,21 +23,23 @@
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static int signal_nr = 15;
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static int user_id = -1;
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static int quiet = 0;
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static char *userspec = NULL;
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static char *cmdname = NULL;
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static char *execname = NULL;
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static char *pidfile = NULL;
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typedef struct pid_list {
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struct pid_list {
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struct pid_list *next;
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int pid;
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} pid_list;
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pid_t pid;
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};
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static pid_list *found = NULL;
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static struct pid_list *found = NULL;
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static inline void
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push(int pid)
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push(pid_t pid)
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{
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pid_list *p;
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struct pid_list *p;
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p = xmalloc(sizeof(*p));
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p->next = found;
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@ -46,22 +48,20 @@ push(int pid)
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}
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static int
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pid_is_exec(int pid, const char *exec)
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pid_is_exec(pid_t pid, const char *name)
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{
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char buf[PATH_MAX];
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FILE *fp;
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char buf[32];
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struct stat sb, exec_stat;
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sprintf(buf, "/proc/%d/cmdline", pid);
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fp = fopen(buf, "r");
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if (fp && fgets (buf, sizeof (buf), fp) ) {
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fclose(fp);
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if (strncmp (buf, exec, strlen(exec)) == 0)
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return 1;
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}
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if (name && stat(name, &exec_stat))
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bb_perror_msg_and_die("stat %s", name);
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sprintf(buf, "/proc/%d/exe", pid);
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if (stat(buf, &sb) != 0)
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return 0;
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return (sb.st_dev == exec_stat.st_dev && sb.st_ino == exec_stat.st_ino);
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}
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static int
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pid_is_user(int pid, int uid)
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{
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@ -74,9 +74,8 @@ pid_is_user(int pid, int uid)
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return (sb.st_uid == uid);
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}
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static int
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pid_is_cmd(int pid, const char *name)
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pid_is_cmd(pid_t pid, const char *name)
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{
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char buf[32];
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FILE *f;
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@ -116,9 +115,24 @@ check(int pid)
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}
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static void
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do_pidfile(const char *name)
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{
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FILE *f;
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pid_t pid;
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f = fopen(name, "r");
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if (f) {
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if (fscanf(f, "%d", &pid) == 1)
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check(pid);
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fclose(f);
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} else if (errno != ENOENT)
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bb_perror_msg_and_die("open pidfile %s", name);
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}
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static void
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do_procfs(void)
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do_procinit(void)
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{
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DIR *procdir;
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struct dirent *entry;
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@ -145,9 +159,14 @@ static void
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do_stop(void)
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{
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char what[1024];
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pid_list *p;
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struct pid_list *p;
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int killed = 0;
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if (pidfile)
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do_pidfile(pidfile);
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else
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do_procinit();
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if (cmdname)
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strcpy(what, cmdname);
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else if (execname)
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@ -158,6 +177,7 @@ do_stop(void)
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bb_error_msg_and_die ("internal error, please report");
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if (!found) {
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if (!quiet)
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printf("no %s found; none killed.\n", what);
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return;
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}
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@ -169,7 +189,7 @@ do_stop(void)
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bb_perror_msg("warning: failed to kill %d:", p->pid);
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}
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}
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if (killed) {
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if (!quiet && killed) {
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printf("stopped %s (pid", what);
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for (p = found; p; p = p->next)
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if(p->pid < 0)
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@ -183,17 +203,20 @@ static const struct option ssd_long_options[] = {
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{ "stop", 0, NULL, 'K' },
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{ "start", 0, NULL, 'S' },
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{ "background", 0, NULL, 'b' },
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{ "quiet", 0, NULL, 'q' },
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{ "startas", 1, NULL, 'a' },
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{ "name", 1, NULL, 'n' },
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{ "signal", 1, NULL, 's' },
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{ "user", 1, NULL, 'u' },
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{ "exec", 1, NULL, 'x' },
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{ "pidfile", 1, NULL, 'p' },
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{ 0, 0, 0, 0 }
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};
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#define SSD_CTX_STOP 1
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#define SSD_CTX_START 2
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#define SSD_OPT_BACKGROUND 4
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#define SSD_OPT_QUIET 8
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int
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start_stop_daemon_main(int argc, char **argv)
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@ -205,8 +228,8 @@ start_stop_daemon_main(int argc, char **argv)
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bb_applet_long_options = ssd_long_options;
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bb_opt_complementaly = "K~S:S~K";
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opt = bb_getopt_ulflags(argc, argv, "KSba:n:s:u:x:",
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&startas, &cmdname, &signame, &userspec, &execname);
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opt = bb_getopt_ulflags(argc, argv, "KSbqa:n:s:u:x:p:",
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&startas, &cmdname, &signame, &userspec, &execname, &pidfile);
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/* Check one and only one context option was given */
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if ((opt & 0x80000000UL) || (opt & (SSD_CTX_STOP | SSD_CTX_START)) == 0) {
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@ -232,7 +255,7 @@ start_stop_daemon_main(int argc, char **argv)
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if (userspec && sscanf(userspec, "%d", &user_id) != 1)
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user_id = my_getpwnam(userspec);
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do_procfs();
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do_procinit();
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if (opt & SSD_CTX_STOP) {
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do_stop();
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@ -240,6 +263,7 @@ start_stop_daemon_main(int argc, char **argv)
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}
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if (found) {
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if (!quiet)
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printf("%s already running.\n%d\n", execname ,found->pid);
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return EXIT_SUCCESS;
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}
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@ -2212,18 +2212,20 @@
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"f\n"
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#define start_stop_daemon_trivial_usage \
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"[OPTIONS]"
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"[OPTIONS] [-S|--start|-K|--stop] ... [-- arguments...]\n"
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#define start_stop_daemon_full_usage \
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"Program to start and stop services.\n"\
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"Options:\n" \
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"-S\t\t\tstart\n"\
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"-K\t\t\tstop\n"\
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"-b\t\t\tforce process into background (daemonize)\n"\
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"-x <executable>\t\tprogram to start/check if it is running\n"\
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"-u <username>|<uid>\tstop this user's processes\n"\
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"-n <process-name>\tstop processes with this name\n"\
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"-s <signal>\t\tsignal to send (default 15)\n"\
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"-a <pathname>\t\tprogram to start (default <executable>)\n"
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"Program to start and stop services."\
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"\n\nOptions:"\
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"\n\t-S|--start\t\t\tstart"\
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"\n\t-K|--stop\t\t\tstop"\
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"\n\t-a|--startas <pathname>\t\tstart the process specified by pathname"\
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"\n\t-b|--background\t\t\tforce process into background"\
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"\n\t-u|--user <username>|<uid>\tstop this user's processes"\
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"\n\t-x|--exec <executable>\t\tprogram to start/check if it is running"\
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"\n\t-n|--name <process-name>\tstop processes with this name"\
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"\n\t-p|--pidfile <pid-file>\t\tsave or load pid using a pid-file"\
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"\n\t-q|--quiet\t\t\tbe quiet" \
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"\n\t-s|--signal <signal>\t\tsignal to send (default TERM)\n"
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#define strings_trivial_usage \
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"[-afo] [-n length] [file ... ]"
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