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Diffstat (limited to 'i/pc104/initrd/conf/busybox/debianutils/start_stop_daemon.c')
-rw-r--r--i/pc104/initrd/conf/busybox/debianutils/start_stop_daemon.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/debianutils/start_stop_daemon.c b/i/pc104/initrd/conf/busybox/debianutils/start_stop_daemon.c
new file mode 100644
index 0000000..1862f11
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/debianutils/start_stop_daemon.c
@@ -0,0 +1,330 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini start-stop-daemon implementation(s) for busybox
+ *
+ * Written by Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>,
+ * Adapted for busybox David Kimdon <dwhedon@gordian.com>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "busybox.h"
+#include <getopt.h>
+#include <sys/resource.h>
+
+static int signal_nr = 15;
+static int user_id = -1;
+static char *userspec;
+static char *cmdname;
+static char *execname;
+static char *pidfile;
+static smallint quiet;
+
+struct pid_list {
+ struct pid_list *next;
+ pid_t pid;
+};
+
+static struct pid_list *found;
+
+static inline void push(pid_t pid)
+{
+ struct pid_list *p;
+
+ p = xmalloc(sizeof(*p));
+ p->next = found;
+ p->pid = pid;
+ found = p;
+}
+
+static int pid_is_exec(pid_t pid, const char *name)
+{
+ char buf[sizeof("/proc//exe") + sizeof(int)*3];
+ char *execbuf;
+ int sz;
+ int equal;
+
+ sprintf(buf, "/proc/%d/exe", pid);
+ sz = strlen(name) + 1;
+ execbuf = xzalloc(sz);
+ readlink(buf, execbuf, sz);
+
+ /* if readlink fails, execbuf still contains "" */
+ equal = !strcmp(execbuf, name);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(execbuf);
+ return equal;
+}
+
+static int pid_is_user(int pid, int uid)
+{
+ struct stat sb;
+ char buf[sizeof("/proc/") + sizeof(int)*3];
+
+ sprintf(buf, "/proc/%u", pid);
+ if (stat(buf, &sb) != 0)
+ return 0;
+ return (sb.st_uid == uid);
+}
+
+static int pid_is_cmd(pid_t pid, const char *name)
+{
+ char fname[sizeof("/proc//stat") + sizeof(int)*3];
+ char *buf;
+ int r = 0;
+
+ sprintf(fname, "/proc/%u/stat", pid);
+ buf = xmalloc_open_read_close(fname, NULL);
+ if (buf) {
+ char *p = strchr(buf, '(');
+ if (p) {
+ char *pe = strrchr(++p, ')');
+ if (pe) {
+ *pe = '\0';
+ r = !strcmp(p, name);
+ }
+ }
+ free(buf);
+ }
+ return r;
+}
+
+
+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_pidfile(void)
+{
+ FILE *f;
+ pid_t pid;
+
+ f = fopen(pidfile, "r");
+ if (f) {
+ if (fscanf(f, "%u", &pid) == 1)
+ check(pid);
+ fclose(f);
+ } else if (errno != ENOENT)
+ bb_perror_msg_and_die("open pidfile %s", pidfile);
+}
+
+static void do_procinit(void)
+{
+ DIR *procdir;
+ struct dirent *entry;
+ int foundany, pid;
+
+ if (pidfile) {
+ do_pidfile();
+ return;
+ }
+
+ procdir = xopendir("/proc");
+
+ foundany = 0;
+ while ((entry = readdir(procdir)) != NULL) {
+ pid = bb_strtou(entry->d_name, NULL, 10);
+ if (errno)
+ continue;
+ foundany++;
+ check(pid);
+ }
+ closedir(procdir);
+ if (!foundany)
+ bb_error_msg_and_die ("nothing in /proc - not mounted?");
+}
+
+
+static int do_stop(void)
+{
+ char *what;
+ struct pid_list *p;
+ int killed = 0;
+
+ do_procinit();
+
+ if (cmdname)
+ what = xstrdup(cmdname);
+ else if (execname)
+ what = xstrdup(execname);
+ else if (pidfile)
+ what = xasprintf("process in pidfile '%s'", pidfile);
+ else if (userspec)
+ what = xasprintf("process(es) owned by '%s'", userspec);
+ else
+ bb_error_msg_and_die("internal error, please report");
+
+ if (!found) {
+ if (!quiet)
+ printf("no %s found; none killed\n", what);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(what);
+ return -1;
+ }
+ 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 (!quiet && killed) {
+ printf("stopped %s (pid", what);
+ for (p = found; p; p = p->next)
+ if(p->pid < 0)
+ printf(" %d", -p->pid);
+ puts(")");
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(what);
+ return killed;
+}
+
+#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
+static const struct option long_options[] = {
+ { "stop", 0, NULL, 'K' },
+ { "start", 0, NULL, 'S' },
+ { "background", 0, NULL, 'b' },
+ { "quiet", 0, NULL, 'q' },
+ { "make-pidfile", 0, NULL, 'm' },
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+ { "oknodo", 0, NULL, 'o' },
+ { "verbose", 0, NULL, 'v' },
+ { "nicelevel", 1, NULL, 'N' },
+#endif
+ { "startas", 1, NULL, 'a' },
+ { "name", 1, NULL, 'n' },
+ { "signal", 1, NULL, 's' },
+ { "user", 1, NULL, 'u' },
+ { "chuid", 1, NULL, 'c' },
+ { "exec", 1, NULL, 'x' },
+ { "pidfile", 1, NULL, 'p' },
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+ { "retry", 1, NULL, 'R' },
+#endif
+ { 0, 0, 0, 0 }
+};
+#endif
+
+enum {
+ CTX_STOP = 0x1,
+ CTX_START = 0x2,
+ OPT_BACKGROUND = 0x4, // -b
+ OPT_QUIET = 0x8, // -q
+ OPT_MAKEPID = 0x10, // -m
+ OPT_a = 0x20, // -a
+ OPT_n = 0x40, // -n
+ OPT_s = 0x80, // -s
+ OPT_u = 0x100, // -u
+ OPT_c = 0x200, // -c
+ OPT_x = 0x400, // -x
+ OPT_p = 0x800, // -p
+ OPT_OKNODO = 0x1000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -o
+ OPT_VERBOSE = 0x2000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -v
+ OPT_NICELEVEL = 0x4000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -N
+};
+
+int start_stop_daemon_main(int argc, char **argv);
+int start_stop_daemon_main(int argc, char **argv)
+{
+ unsigned opt;
+ char *signame;
+ char *startas;
+ char *chuid;
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+// char *retry_arg = NULL;
+// int retries = -1;
+ char *opt_N;
+#endif
+#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
+ applet_long_options = long_options;
+#endif
+
+ /* Check required one context option was given */
+ opt_complementary = "K:S:?:K--S:S--K:m?p:K?xpun:S?xa";
+ opt = getopt32(argc, argv, "KSbqma:n:s:u:c:x:p:"
+ USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:"),
+// USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
+ &startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
+ USE_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
+// USE_FEATURE_START_STOP_DAEMON_FANCY(,&retry_arg)
+ );
+
+ quiet = (opt & OPT_QUIET) && !(opt & OPT_VERBOSE);
+
+ if (opt & OPT_s) {
+ signal_nr = get_signum(signame);
+ if (signal_nr < 0) bb_show_usage();
+ }
+
+ if (!(opt & OPT_a))
+ startas = execname;
+
+// USE_FEATURE_START_STOP_DAEMON_FANCY(
+// if (retry_arg)
+// retries = xatoi_u(retry_arg);
+// )
+ argc -= optind;
+ argv += optind;
+
+ if (userspec) {
+ user_id = bb_strtou(userspec, NULL, 10);
+ if (errno)
+ user_id = xuname2uid(userspec);
+ }
+
+ if (opt & CTX_STOP) {
+ int i = do_stop();
+ return (opt & OPT_OKNODO) ? 0 : (i<=0);
+ }
+
+ do_procinit();
+
+ if (found) {
+ if (!quiet)
+ printf("%s already running\n%d\n", execname, found->pid);
+ return !(opt & OPT_OKNODO);
+ }
+ *--argv = startas;
+ if (opt & OPT_BACKGROUND) {
+ setsid();
+ bb_daemonize();
+ }
+ if (opt & OPT_MAKEPID) {
+ /* user wants _us_ to make the pidfile */
+ FILE *pidf = xfopen(pidfile, "w");
+
+ pid_t pidt = getpid();
+ fprintf(pidf, "%d\n", pidt);
+ fclose(pidf);
+ }
+ if (opt & OPT_c) {
+ struct bb_uidgid_t ugid;
+ parse_chown_usergroup_or_die(&ugid, chuid);
+ if (ugid.gid != (gid_t) -1) xsetgid(ugid.gid);
+ if (ugid.uid != (uid_t) -1) xsetuid(ugid.uid);
+ }
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+ if (opt & OPT_NICELEVEL) {
+ /* Set process priority */
+ int prio = getpriority(PRIO_PROCESS, 0) + xatoi_range(opt_N, INT_MIN/2, INT_MAX/2);
+ if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
+ bb_perror_msg_and_die("setpriority(%d)", prio);
+ }
+ }
+#endif
+ execv(startas, argv);
+ bb_perror_msg_and_die("cannot start %s", startas);
+}