diff options
Diffstat (limited to 'start_stop_daemon.c')
| -rw-r--r-- | start_stop_daemon.c | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/start_stop_daemon.c b/start_stop_daemon.c deleted file mode 100644 index 0152283..0000000 --- a/start_stop_daemon.c +++ /dev/null @@ -1,271 +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 <pwd.h> - -#include "busybox.h" - -static int start = 0; -static int stop = 0; -static int signal_nr = 15; -static int user_id = -1; -static const char *userspec = NULL; -static const char *cmdname = NULL; -static char *execname = NULL; -static char *startas = NULL; -static const char *progname = ""; - -struct pid_list { - struct pid_list *next; - int pid; -}; - -static struct pid_list *found = NULL; -static struct pid_list *killed = NULL; - -static void -push(struct pid_list **list, int pid) -{ - struct pid_list *p; - - p = xmalloc(sizeof(*p)); - p->next = *list; - p->pid = pid; - *list = p; -} - - -static void -parse_options(int argc, char * const *argv) -{ - - int c; - - for (;;) { - c = getopt (argc, argv, "a:n:s:u:x:KS"); - if (c == EOF) - break; - switch (c) { - case 'K': - stop = 1; - break; - case 'S': - start = 1; - break; - case 'a': - startas = optarg; - break; - case 'n': - cmdname = optarg; - break; - case 's': - if (sscanf(optarg, "%d", &signal_nr) != 1) - error_msg_and_die ("-s takes a numeric argument"); - break; - case 'u': - userspec = optarg; - break; - case 'x': - execname = optarg; - break; - default: - show_usage(); - exit(1); - } - } - - if (start == stop) - error_msg_and_die ("need one of -S or -K"); - - if (!execname && !userspec) - error_msg_and_die ("need at least one of -x or -u"); - - if (!startas) - startas = execname; - - if (start && !startas) - error_msg_and_die ("-S needs -x or -a"); -} - - -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) ) { - 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(&found, pid); -} - - - -static void -do_procfs(void) -{ - DIR *procdir; - struct dirent *entry; - int foundany, pid; - - procdir = opendir("/proc"); - if (!procdir) - 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) - error_msg_and_die ("nothing in /proc - not mounted?"); -} - - -static void -do_stop(void) -{ - char what[1024]; - struct pid_list *p; - - if (cmdname) - strcpy(what, cmdname); - else if (execname) - strcpy(what, execname); - else if (userspec) - sprintf(what, "process(es) owned by `%s'", userspec); - else - error_msg_and_die ("internal error, please report"); - - if (!found) { - printf("no %s found; none killed.\n", what); - exit(0); - } - for (p = found; p; p = p->next) { - if (kill(p->pid, signal_nr) == 0) - push(&killed, p->pid); - else - printf("%s: warning: failed to kill %d: %s\n", - progname, p->pid, strerror(errno)); - } - if (killed) { - printf("stopped %s (pid", what); - for (p = killed; p; p = p->next) - printf(" %d", p->pid); - printf(").\n"); - } -} - - -int -start_stop_daemon_main(int argc, char **argv) -{ - progname = argv[0]; - - parse_options(argc, argv); - argc -= optind; - argv += optind; - - if (userspec && sscanf(userspec, "%d", &user_id) != 1) { - struct passwd *pw; - - pw = getpwnam(userspec); - if (!pw) - error_msg_and_die ("user `%s' not found\n", userspec); - - user_id = pw->pw_uid; - } - - do_procfs(); - - if (stop) { - do_stop(); - exit(0); - } - - if (found) { - printf("%s already running.\n", execname); - printf("%d\n",found->pid); - exit(0); - } - *--argv = startas; - execv(startas, argv); - perror_msg_and_die ("unable to start %s", startas); -} - |