diff options
Diffstat (limited to 'init/start_stop_daemon.c')
| -rw-r--r-- | init/start_stop_daemon.c | 253 |
1 files changed, 0 insertions, 253 deletions
diff --git a/init/start_stop_daemon.c b/init/start_stop_daemon.c deleted file mode 100644 index 482078e..0000000 --- a/init/start_stop_daemon.c +++ /dev/null @@ -1,253 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Mini start-stop-daemon implementation(s) for busybox - * - * Written by Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>, - * public domain. - * Adapted for busybox David Kimdon <dwhedon@gordian.com> - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> -#include <signal.h> -#include <errno.h> -#include <sys/stat.h> -#include <dirent.h> -#include <unistd.h> -#include <getopt.h> - -#include "busybox.h" -#include "pwd_.h" - -static int start = 0; -static int stop = 0; -static int fork_before_exec = 0; -static int signal_nr = 15; -static int user_id = -1; -static char *userspec = NULL; -static char *cmdname = NULL; -static char *execname = NULL; -static char *startas = NULL; - -typedef struct pid_list { - struct pid_list *next; - int pid; -} pid_list; - -static pid_list *found = NULL; - -static inline void -push(int pid) -{ - pid_list *p; - - p = xmalloc(sizeof(*p)); - p->next = found; - p->pid = pid; - found = p; -} - -static int -pid_is_exec(int pid, const char *exec) -{ - char buf[PATH_MAX]; - FILE *fp; - - sprintf(buf, "/proc/%d/cmdline", pid); - fp = fopen(buf, "r"); - if (fp && fgets (buf, sizeof (buf), fp) ) { - fclose(fp); - if (strncmp (buf, exec, strlen(exec)) == 0) - return 1; - } - return 0; -} - - -static int -pid_is_user(int pid, int uid) -{ - struct stat sb; - char buf[32]; - - sprintf(buf, "/proc/%d", pid); - if (stat(buf, &sb) != 0) - return 0; - return (sb.st_uid == uid); -} - - -static int -pid_is_cmd(int pid, const char *name) -{ - char buf[32]; - FILE *f; - int c; - - sprintf(buf, "/proc/%d/stat", pid); - f = fopen(buf, "r"); - if (!f) - return 0; - while ((c = getc(f)) != EOF && c != '(') - ; - if (c != '(') { - fclose(f); - return 0; - } - /* this hopefully handles command names containing ')' */ - while ((c = getc(f)) != EOF && c == *name) - name++; - fclose(f); - return (c == ')' && *name == '\0'); -} - - -static void -check(int pid) -{ - if (execname && !pid_is_exec(pid, execname)) { - return; - } - if (userspec && !pid_is_user(pid, user_id)) { - return; - } - if (cmdname && !pid_is_cmd(pid, cmdname)) { - return; - } - push(pid); -} - - - -static void -do_procfs(void) -{ - DIR *procdir; - struct dirent *entry; - int foundany, pid; - - procdir = opendir("/proc"); - if (!procdir) - bb_perror_msg_and_die ("opendir /proc"); - - foundany = 0; - while ((entry = readdir(procdir)) != NULL) { - if (sscanf(entry->d_name, "%d", &pid) != 1) - continue; - foundany++; - check(pid); - } - closedir(procdir); - if (!foundany) - bb_error_msg_and_die ("nothing in /proc - not mounted?"); -} - - -static void -do_stop(void) -{ - char what[1024]; - pid_list *p; - int killed = 0; - - if (cmdname) - strcpy(what, cmdname); - else if (execname) - strcpy(what, execname); - else if (userspec) - sprintf(what, "process(es) owned by `%s'", userspec); - else - bb_error_msg_and_die ("internal error, please report"); - - if (!found) { - printf("no %s found; none killed.\n", what); - return; - } - for (p = found; p; p = p->next) { - if (kill(p->pid, signal_nr) == 0) { - p->pid = -p->pid; - killed++; - } else { - bb_perror_msg("warning: failed to kill %d:", p->pid); - } - } - if (killed) { - printf("stopped %s (pid", what); - for (p = found; p; p = p->next) - if(p->pid < 0) - printf(" %d", -p->pid); - printf(").\n"); - } -} - - -static const struct option ssd_long_options[] = { - { "stop", 0, NULL, 'K' }, - { "start", 0, NULL, 'S' }, - { "background", 0, NULL, 'b' }, - { "startas", 1, NULL, 'a' }, - { "name", 1, NULL, 'n' }, - { "signal", 1, NULL, 's' }, - { "user", 1, NULL, 'u' }, - { "exec", 1, NULL, 'x' }, - { 0, 0, 0, 0 } -}; - -int -start_stop_daemon_main(int argc, char **argv) -{ - int flags; - char *signame; - bb_applet_long_options = ssd_long_options; - - flags = bb_getopt_ulflags(argc, argv, "KSba:n:s:u:x:", - &startas, &cmdname, &signame, &userspec, &execname); - - /* Be sneaky and avoid branching */ - stop = (flags & 1); - start = (flags & 2); - fork_before_exec = (flags & 4); - - signal_nr = bb_xgetlarg(signame, 10, 0, NSIG); - - if (start == stop) - bb_error_msg_and_die ("need exactly one of -S or -K"); - - if (!execname && !userspec) - bb_error_msg_and_die ("need at least one of -x or -u"); - - if (!startas) - startas = execname; - - if (start && !startas) - bb_error_msg_and_die ("-S needs -x or -a"); - - argc -= optind; - argv += optind; - - if (userspec && sscanf(userspec, "%d", &user_id) != 1) - user_id = my_getpwnam(userspec); - - do_procfs(); - - if (stop) { - do_stop(); - return EXIT_SUCCESS; - } - - if (found) { - printf("%s already running.\n%d\n", execname ,found->pid); - return EXIT_SUCCESS; - } - *--argv = startas; - if (fork_before_exec) { - if (daemon(0, 0) == -1) - bb_perror_msg_and_die ("unable to fork"); - } - setsid(); - execv(startas, argv); - bb_perror_msg_and_die ("unable to start %s", startas); -} - |