zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/busybox/src/debianutils/start_stop_daemon.c b/ap/app/busybox/src/debianutils/start_stop_daemon.c
new file mode 100644
index 0000000..7dadc3c
--- /dev/null
+++ b/ap/app/busybox/src/debianutils/start_stop_daemon.c
@@ -0,0 +1,538 @@
+/* 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 source tree.
+ */
+
+/*
+This is how it is supposed to work:
+
+start-stop-daemon [OPTIONS] [--start|--stop] [[--] arguments...]
+
+One (only) of these must be given:
+ -S,--start Start
+ -K,--stop Stop
+
+Search for matching processes.
+If --stop is given, stop all matching processes (by sending a signal).
+If --start is given, start a new process unless a matching process was found.
+
+Options controlling process matching
+(if multiple conditions are specified, all must match):
+ -u,--user USERNAME|UID Only consider this user's processes
+ -n,--name PROCESS_NAME Look for processes by matching PROCESS_NAME
+ with comm field in /proc/$PID/stat.
+ Only basename is compared:
+ "ntpd" == "./ntpd" == "/path/to/ntpd".
+[TODO: can PROCESS_NAME be a full pathname? Should we require full match then
+with /proc/$PID/exe or argv[0] (comm can't be matched, it never contains path)]
+ -x,--exec EXECUTABLE Look for processes that were started with this
+ command in /proc/$PID/exe and /proc/$PID/cmdline
+ (/proc/$PID/cmdline is a bbox extension)
+ Unlike -n, we match against the full path:
+ "ntpd" != "./ntpd" != "/path/to/ntpd"
+ -p,--pidfile PID_FILE Look for processes with PID from this file
+
+Options which are valid for --start only:
+ -x,--exec EXECUTABLE Program to run (1st arg of execvp). Mandatory.
+ -a,--startas NAME argv[0] (defaults to EXECUTABLE)
+ -b,--background Put process into background
+ -N,--nicelevel N Add N to process' nice level
+ -c,--chuid USER[:[GRP]] Change to specified user [and group]
+ -m,--make-pidfile Write PID to the pidfile
+ (both -m and -p must be given!)
+
+Options which are valid for --stop only:
+ -s,--signal SIG Signal to send (default:TERM)
+ -t,--test Exit with status 0 if process is found
+ (we don't actually start or stop daemons)
+
+Misc options:
+ -o,--oknodo Exit with status 0 if nothing is done
+ -q,--quiet Quiet
+ -v,--verbose Verbose
+*/
+
+//usage:#define start_stop_daemon_trivial_usage
+//usage: "[OPTIONS] [-S|-K] ... [-- ARGS...]"
+//usage:#define start_stop_daemon_full_usage "\n\n"
+//usage: "Search for matching processes, and then\n"
+//usage: "-K: stop all matching processes.\n"
+//usage: "-S: start a process unless a matching process is found.\n"
+//usage: IF_FEATURE_START_STOP_DAEMON_LONG_OPTIONS(
+//usage: "\nProcess matching:"
+//usage: "\n -u,--user USERNAME|UID Match only this user's processes"
+//usage: "\n -n,--name NAME Match processes with NAME"
+//usage: "\n in comm field in /proc/PID/stat"
+//usage: "\n -x,--exec EXECUTABLE Match processes with this command"
+//usage: "\n in /proc/PID/{exe,cmdline}"
+//usage: "\n -p,--pidfile FILE Match a process with PID from the file"
+//usage: "\n All specified conditions must match"
+//usage: "\n-S only:"
+//usage: "\n -x,--exec EXECUTABLE Program to run"
+//usage: "\n -a,--startas NAME Zeroth argument"
+//usage: "\n -b,--background Background"
+//usage: IF_FEATURE_START_STOP_DAEMON_FANCY(
+//usage: "\n -N,--nicelevel N Change nice level"
+//usage: )
+//usage: "\n -c,--chuid USER[:[GRP]] Change to user/group"
+//usage: "\n -m,--make-pidfile Write PID to the pidfile specified by -p"
+//usage: "\n-K only:"
+//usage: "\n -s,--signal SIG Signal to send"
+//usage: "\n -t,--test Match only, exit with 0 if a process is found"
+//usage: "\nOther:"
+//usage: IF_FEATURE_START_STOP_DAEMON_FANCY(
+//usage: "\n -o,--oknodo Exit with status 0 if nothing is done"
+//usage: "\n -v,--verbose Verbose"
+//usage: )
+//usage: "\n -q,--quiet Quiet"
+//usage: )
+//usage: IF_NOT_FEATURE_START_STOP_DAEMON_LONG_OPTIONS(
+//usage: "\nProcess matching:"
+//usage: "\n -u USERNAME|UID Match only this user's processes"
+//usage: "\n -n NAME Match processes with NAME"
+//usage: "\n in comm field in /proc/PID/stat"
+//usage: "\n -x EXECUTABLE Match processes with this command"
+//usage: "\n command in /proc/PID/cmdline"
+//usage: "\n -p FILE Match a process with PID from the file"
+//usage: "\n All specified conditions must match"
+//usage: "\n-S only:"
+//usage: "\n -x EXECUTABLE Program to run"
+//usage: "\n -a NAME Zeroth argument"
+//usage: "\n -b Background"
+//usage: IF_FEATURE_START_STOP_DAEMON_FANCY(
+//usage: "\n -N N Change nice level"
+//usage: )
+//usage: "\n -c USER[:[GRP]] Change to user/group"
+//usage: "\n -m Write PID to the pidfile specified by -p"
+//usage: "\n-K only:"
+//usage: "\n -s SIG Signal to send"
+//usage: "\n -t Match only, exit with 0 if a process is found"
+//usage: "\nOther:"
+//usage: IF_FEATURE_START_STOP_DAEMON_FANCY(
+//usage: "\n -o Exit with status 0 if nothing is done"
+//usage: "\n -v Verbose"
+//usage: )
+//usage: "\n -q Quiet"
+//usage: )
+
+#include <sys/resource.h>
+
+/* Override ENABLE_FEATURE_PIDFILE */
+#define WANT_PIDFILE 1
+#include "libbb.h"
+
+struct pid_list {
+ struct pid_list *next;
+ pid_t pid;
+};
+
+enum {
+ CTX_STOP = (1 << 0),
+ CTX_START = (1 << 1),
+ OPT_BACKGROUND = (1 << 2), // -b
+ OPT_QUIET = (1 << 3), // -q
+ OPT_TEST = (1 << 4), // -t
+ OPT_MAKEPID = (1 << 5), // -m
+ OPT_a = (1 << 6), // -a
+ OPT_n = (1 << 7), // -n
+ OPT_s = (1 << 8), // -s
+ OPT_u = (1 << 9), // -u
+ OPT_c = (1 << 10), // -c
+ OPT_x = (1 << 11), // -x
+ OPT_p = (1 << 12), // -p
+ OPT_OKNODO = (1 << 13) * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -o
+ OPT_VERBOSE = (1 << 14) * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -v
+ OPT_NICELEVEL = (1 << 15) * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -N
+};
+#define QUIET (option_mask32 & OPT_QUIET)
+#define TEST (option_mask32 & OPT_TEST)
+
+struct globals {
+ struct pid_list *found_procs;
+ char *userspec;
+ char *cmdname;
+ char *execname;
+ char *pidfile;
+ char *execname_cmpbuf;
+ unsigned execname_sizeof;
+ int user_id;
+ smallint signal_nr;
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define userspec (G.userspec )
+#define cmdname (G.cmdname )
+#define execname (G.execname )
+#define pidfile (G.pidfile )
+#define user_id (G.user_id )
+#define signal_nr (G.signal_nr )
+#define INIT_G() do { \
+ user_id = -1; \
+ signal_nr = 15; \
+} while (0)
+
+#ifdef OLDER_VERSION_OF_X
+/* -x,--exec EXECUTABLE
+ * Look for processes with matching /proc/$PID/exe.
+ * Match is performed using device+inode.
+ */
+static int pid_is_exec(pid_t pid)
+{
+ struct stat st;
+ char buf[sizeof("/proc/%u/exe") + sizeof(int)*3];
+
+ sprintf(buf, "/proc/%u/exe", (unsigned)pid);
+ if (stat(buf, &st) < 0)
+ return 0;
+ if (st.st_dev == execstat.st_dev
+ && st.st_ino == execstat.st_ino)
+ return 1;
+ return 0;
+}
+#endif
+
+static int pid_is_exec(pid_t pid)
+{
+ ssize_t bytes;
+ char buf[sizeof("/proc/%u/cmdline") + sizeof(int)*3];
+ char *procname, *exelink;
+ int match;
+
+ procname = buf + sprintf(buf, "/proc/%u/exe", (unsigned)pid) - 3;
+
+ exelink = xmalloc_readlink(buf);
+ match = (exelink && strcmp(execname, exelink) == 0);
+ free(exelink);
+ if (match)
+ return match;
+
+ strcpy(procname, "cmdline");
+ bytes = open_read_close(buf, G.execname_cmpbuf, G.execname_sizeof);
+ if (bytes > 0) {
+ G.execname_cmpbuf[bytes] = '\0';
+ return strcmp(execname, G.execname_cmpbuf) == 0;
+ }
+ return 0;
+}
+
+static int pid_is_name(pid_t pid)
+{
+ /* /proc/PID/stat is "PID (comm_15_bytes_max) ..." */
+ char buf[32]; /* should be enough */
+ char *p, *pe;
+
+ sprintf(buf, "/proc/%u/stat", (unsigned)pid);
+ if (open_read_close(buf, buf, sizeof(buf) - 1) < 0)
+ return 0;
+ buf[sizeof(buf) - 1] = '\0'; /* paranoia */
+ p = strchr(buf, '(');
+ if (!p)
+ return 0;
+ pe = strrchr(++p, ')');
+ if (!pe)
+ return 0;
+ *pe = '\0';
+ /* we require comm to match and to not be truncated */
+ /* in Linux, if comm is 15 chars, it may be a truncated
+ * name, so we don't allow that to match */
+ if (strlen(p) >= COMM_LEN - 1) /* COMM_LEN is 16 */
+ return 0;
+ return strcmp(p, cmdname) == 0;
+}
+
+static int pid_is_user(int pid)
+{
+ struct stat sb;
+ char buf[sizeof("/proc/") + sizeof(int)*3];
+
+ sprintf(buf, "/proc/%u", (unsigned)pid);
+ if (stat(buf, &sb) != 0)
+ return 0;
+ return (sb.st_uid == (uid_t)user_id);
+}
+
+static void check(int pid)
+{
+ struct pid_list *p;
+
+ if (execname && !pid_is_exec(pid)) {
+ return;
+ }
+ if (cmdname && !pid_is_name(pid)) {
+ return;
+ }
+ if (userspec && !pid_is_user(pid)) {
+ return;
+ }
+ p = xmalloc(sizeof(*p));
+ p->next = G.found_procs;
+ p->pid = pid;
+ G.found_procs = p;
+}
+
+static void do_pidfile(void)
+{
+ FILE *f;
+ unsigned pid;
+
+ f = fopen_for_read(pidfile);
+ 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 pid;
+
+ if (pidfile) {
+ do_pidfile();
+ return;
+ }
+
+ procdir = xopendir("/proc");
+
+ pid = 0;
+ while (1) {
+ errno = 0; /* clear any previous error */
+ entry = readdir(procdir);
+// TODO: this check is too generic, it's better
+// to check for exact errno(s) which mean that we got stale entry
+ if (errno) /* Stale entry, process has died after opendir */
+ continue;
+ if (!entry) /* EOF, no more entries */
+ break;
+ pid = bb_strtou(entry->d_name, NULL, 10);
+ if (errno) /* NaN */
+ continue;
+ check(pid);
+ }
+ closedir(procdir);
+ if (!pid)
+ bb_error_msg_and_die("nothing in /proc - not mounted?");
+}
+
+static int do_stop(void)
+{
+ char *what;
+ struct pid_list *p;
+ int killed = 0;
+
+ if (cmdname) {
+ if (ENABLE_FEATURE_CLEAN_UP) what = xstrdup(cmdname);
+ if (!ENABLE_FEATURE_CLEAN_UP) what = cmdname;
+ } else if (execname) {
+ if (ENABLE_FEATURE_CLEAN_UP) what = xstrdup(execname);
+ if (!ENABLE_FEATURE_CLEAN_UP) what = 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 (!G.found_procs) {
+ if (!QUIET)
+ printf("no %s found; none killed\n", what);
+ killed = -1;
+ goto ret;
+ }
+ for (p = G.found_procs; p; p = p->next) {
+ if (kill(p->pid, TEST ? 0 : signal_nr) == 0) {
+ killed++;
+ } else {
+ bb_perror_msg("warning: killing process %u", (unsigned)p->pid);
+ p->pid = 0;
+ if (TEST) {
+ /* Example: -K --test --pidfile PIDFILE detected
+ * that PIDFILE's pid doesn't exist */
+ killed = -1;
+ goto ret;
+ }
+ }
+ }
+ if (!QUIET && killed) {
+ printf("stopped %s (pid", what);
+ for (p = G.found_procs; p; p = p->next)
+ if (p->pid)
+ printf(" %u", (unsigned)p->pid);
+ puts(")");
+ }
+ ret:
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(what);
+ return killed;
+}
+
+#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
+static const char start_stop_daemon_longopts[] ALIGN1 =
+ "stop\0" No_argument "K"
+ "start\0" No_argument "S"
+ "background\0" No_argument "b"
+ "quiet\0" No_argument "q"
+ "test\0" No_argument "t"
+ "make-pidfile\0" No_argument "m"
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+ "oknodo\0" No_argument "o"
+ "verbose\0" No_argument "v"
+ "nicelevel\0" Required_argument "N"
+#endif
+ "startas\0" Required_argument "a"
+ "name\0" Required_argument "n"
+ "signal\0" Required_argument "s"
+ "user\0" Required_argument "u"
+ "chuid\0" Required_argument "c"
+ "exec\0" Required_argument "x"
+ "pidfile\0" Required_argument "p"
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+ "retry\0" Required_argument "R"
+#endif
+ ;
+#endif
+
+int start_stop_daemon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned opt;
+ char *signame;
+ char *startas;
+ char *chuid;
+#ifdef OLDER_VERSION_OF_X
+ struct stat execstat;
+#endif
+#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
+// char *retry_arg = NULL;
+// int retries = -1;
+ char *opt_N;
+#endif
+
+ INIT_G();
+
+#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
+ applet_long_options = start_stop_daemon_longopts;
+#endif
+
+ /* -K or -S is required; they are mutually exclusive */
+ /* -p is required if -m is given */
+ /* -xpun (at least one) is required if -K is given */
+ /* -xa (at least one) is required if -S is given */
+ /* -q turns off -v */
+ opt_complementary = "K:S:K--S:S--K:m?p:K?xpun:S?xa"
+ IF_FEATURE_START_STOP_DAEMON_FANCY("q-v");
+ opt = getopt32(argv, "KSbqtma:n:s:u:c:x:p:"
+ IF_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
+ &startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
+ IF_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
+ /* We accept and ignore -R <param> / --retry <param> */
+ IF_FEATURE_START_STOP_DAEMON_FANCY(,NULL)
+ );
+
+ if (opt & OPT_s) {
+ signal_nr = get_signum(signame);
+ if (signal_nr < 0) bb_show_usage();
+ }
+
+ if (!(opt & OPT_a))
+ startas = execname;
+ if (!execname) /* in case -a is given and -x is not */
+ execname = startas;
+ if (execname) {
+ G.execname_sizeof = strlen(execname) + 1;
+ G.execname_cmpbuf = xmalloc(G.execname_sizeof + 1);
+ }
+
+// IF_FEATURE_START_STOP_DAEMON_FANCY(
+// if (retry_arg)
+// retries = xatoi_positive(retry_arg);
+// )
+ //argc -= optind;
+ argv += optind;
+
+ if (userspec) {
+ user_id = bb_strtou(userspec, NULL, 10);
+ if (errno)
+ user_id = xuname2uid(userspec);
+ }
+ /* Both start and stop need to know current processes */
+ do_procinit();
+
+ if (opt & CTX_STOP) {
+ int i = do_stop();
+ return (opt & OPT_OKNODO) ? 0 : (i <= 0);
+ }
+
+ if (G.found_procs) {
+ if (!QUIET)
+ printf("%s is already running\n%u\n", execname, (unsigned)G.found_procs->pid);
+ return !(opt & OPT_OKNODO);
+ }
+
+#ifdef OLDER_VERSION_OF_X
+ if (execname)
+ xstat(execname, &execstat);
+#endif
+
+ *--argv = startas;
+ if (opt & OPT_BACKGROUND) {
+#if BB_MMU
+ bb_daemonize(DAEMON_DEVNULL_STDIO + DAEMON_CLOSE_EXTRA_FDS + DAEMON_DOUBLE_FORK);
+ /* DAEMON_DEVNULL_STDIO is superfluous -
+ * it's always done by bb_daemonize() */
+#else
+ pid_t pid = xvfork();
+ if (pid != 0) {
+ /* parent */
+ /* why _exit? the child may have changed the stack,
+ * so "return 0" may do bad things */
+ _exit(EXIT_SUCCESS);
+ }
+ /* Child */
+ setsid(); /* detach from controlling tty */
+ /* Redirect stdio to /dev/null, close extra FDs.
+ * We do not actually daemonize because of DAEMON_ONLY_SANITIZE */
+ bb_daemonize_or_rexec(DAEMON_DEVNULL_STDIO
+ + DAEMON_CLOSE_EXTRA_FDS
+ + DAEMON_ONLY_SANITIZE,
+ NULL /* argv, unused */ );
+#endif
+ }
+ if (opt & OPT_MAKEPID) {
+ /* User wants _us_ to make the pidfile */
+ write_pidfile(pidfile);
+ }
+ if (opt & OPT_c) {
+ struct bb_uidgid_t ugid = { -1, -1 };
+ parse_chown_usergroup_or_die(&ugid, chuid);
+ if (ugid.uid != (uid_t) -1) {
+ struct passwd *pw = xgetpwuid(ugid.uid);
+ if (ugid.gid != (gid_t) -1)
+ pw->pw_gid = ugid.gid;
+ /* initgroups, setgid, setuid: */
+ change_identity(pw);
+ } else if (ugid.gid != (gid_t) -1) {
+ xsetgid(ugid.gid);
+ setgroups(1, &ugid.gid);
+ }
+ }
+#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
+ execvp(startas, argv);
+ bb_perror_msg_and_die("can't execute '%s'", startas);
+}