--- /dev/null
+/*
+ * A rewrite of the original Debian's start-stop-daemon Perl script
+ * in C (faster - it is executed many times during system startup).
+ *
+ * Written by Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>,
+ * public domain. Based conceptually on start-stop-daemon.pl, by Ian
+ * Jackson <ijackson@gnu.ai.mit.edu>. May be used and distributed
+ * freely for any purpose. Changes by Christian Schwarz
+ * <schwarz@monet.m.isar.de>, to make output conform to the Debian
+ * Console Message Standard, also placed in public domain. Minor
+ * changes by Klee Dienes <klee@debian.org>, also placed in the Public
+ * Domain.
+ *
+ * Changes by Ben Collins <bcollins@debian.org>, added --chuid, --background
+ * and --make-pidfile options, placed in public domain aswell.
+ *
+ * Port to OpenBSD by Sontri Tomo Huynh <huynh.29@osu.edu>
+ * and Andreas Schuldei <andreas@schuldei.org>
+ *
+ * Changes by Ian Jackson: added --retry (and associated rearrangements).
+ *
+ * Modified for Gentoo rc-scripts by Donny Davies <woodchip@gentoo.org>:
+ * I removed the BSD/Hurd/OtherOS stuff, added #include <stddef.h>
+ * and stuck in a #define VERSION "1.9.18". Now it compiles without
+ * the whole automake/config.h dance.
+ */
+
+#ifdef HAVE_LXC
+#define _GNU_SOURCE
+#include <sched.h>
+#endif /* HAVE_LXC */
+
+#include <stddef.h>
+#define VERSION "1.9.18"
+
+#define MIN_POLL_INTERVAL 20000 /*us*/
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <sys/time.h>
+#include <sys/queue.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <pwd.h>
+#include <grp.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/termios.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <assert.h>
+#include <ctype.h>
+#include <error.h>
+#include <linux/sched.h>
+
+static int testmode = 0;
+static int quietmode = 0;
+static int exitnodo = 1;
+static int start = 0;
+static int stop = 0;
+static int background = 0;
+static int mpidfile = 0;
+static int signal_nr = 15;
+static const char *signal_str = NULL;
+static int user_id = -1;
+static int runas_uid = -1;
+static int runas_gid = -1;
+static const char *userspec = NULL;
+static char *changeuser = NULL;
+static const char *changegroup = NULL;
+static char *changeroot = NULL;
+static const char *cmdname = NULL;
+static char *execname = NULL;
+static char *startas = NULL;
+static const char *pidfile = NULL;
+static char what_stop[1024];
+static const char *schedule_str = NULL;
+static const char *progname = "";
+static int nicelevel = 0;
+
+static struct stat exec_stat;
+
+struct pid_list {
+ struct pid_list *next;
+ pid_t pid;
+};
+
+static struct pid_list *found = NULL;
+static struct pid_list *killed = NULL;
+
+struct schedule_item {
+ enum { sched_timeout, sched_signal, sched_goto, sched_forever } type;
+ int value; /* seconds, signal no., or index into array */
+ /* sched_forever is only seen within parse_schedule and callees */
+};
+
+static int schedule_length;
+static struct schedule_item *schedule = NULL;
+
+LIST_HEAD(namespace_head, namespace);
+
+struct namespace {
+ LIST_ENTRY(namespace) list;
+ char *path;
+ int nstype;
+};
+
+static struct namespace_head namespace_head;
+
+static void *xmalloc(int size);
+static void push(struct pid_list **list, pid_t pid);
+static void do_help(void);
+static void parse_options(int argc, char * const *argv);
+static int pid_is_user(pid_t pid, uid_t uid);
+static int pid_is_cmd(pid_t pid, const char *name);
+static void check(pid_t pid);
+static void do_pidfile(const char *name);
+static void do_stop(int signal_nr, int quietmode,
+ int *n_killed, int *n_notkilled, int retry_nr);
+static int pid_is_exec(pid_t pid, const struct stat *esb);
+
+#ifdef __GNUC__
+static void fatal(const char *format, ...)
+ __attribute__((noreturn, format(printf, 1, 2)));
+static void badusage(const char *msg)
+ __attribute__((noreturn));
+#else
+static void fatal(const char *format, ...);
+static void badusage(const char *msg);
+#endif
+
+/* This next part serves only to construct the TVCALC macro, which
+ * is used for doing arithmetic on struct timeval's. It works like this:
+ * TVCALC(result, expression);
+ * where result is a struct timeval (and must be an lvalue) and
+ * expression is the single expression for both components. In this
+ * expression you can use the special values TVELEM, which when fed a
+ * const struct timeval* gives you the relevant component, and
+ * TVADJUST. TVADJUST is necessary when subtracting timevals, to make
+ * it easier to renormalise. Whenver you subtract timeval elements,
+ * you must make sure that TVADJUST is added to the result of the
+ * subtraction (before any resulting multiplication or what have you).
+ * TVELEM must be linear in TVADJUST.
+ */
+typedef long tvselector(const struct timeval*);
+static long tvselector_sec(const struct timeval *tv) { return tv->tv_sec; }
+static long tvselector_usec(const struct timeval *tv) { return tv->tv_usec; }
+#define TVCALC_ELEM(result, expr, sec, adj) \
+{ \
+ const long TVADJUST = adj; \
+ long (*const TVELEM)(const struct timeval*) = tvselector_##sec; \
+ (result).tv_##sec = (expr); \
+}
+#define TVCALC(result,expr) \
+do { \
+ TVCALC_ELEM(result, expr, sec, (-1)); \
+ TVCALC_ELEM(result, expr, usec, (+1000000)); \
+ (result).tv_sec += (result).tv_usec / 1000000; \
+ (result).tv_usec %= 1000000; \
+} while(0)
+
+
+static void
+fatal(const char *format, ...)
+{
+ va_list arglist;
+
+ fprintf(stderr, "%s: ", progname);
+ va_start(arglist, format);
+ vfprintf(stderr, format, arglist);
+ va_end(arglist);
+ putc('\n', stderr);
+ exit(2);
+}
+
+
+static void *
+xmalloc(int size)
+{
+ void *ptr;
+
+ ptr = malloc(size);
+ if (ptr)
+ return ptr;
+ fatal("malloc(%d) failed", size);
+}
+
+static void
+xgettimeofday(struct timeval *tv)
+{
+ if (gettimeofday(tv,0) != 0)
+ fatal("gettimeofday failed: %s", strerror(errno));
+}
+
+static void
+push(struct pid_list **list, pid_t pid)
+{
+ struct pid_list *p;
+
+ p = xmalloc(sizeof(*p));
+ p->next = *list;
+ p->pid = pid;
+ *list = p;
+}
+
+static void
+clear(struct pid_list **list)
+{
+ struct pid_list *here, *next;
+
+ for (here = *list; here != NULL; here = next) {
+ next = here->next;
+ free(here);
+ }
+
+ *list = NULL;
+}
+
+static char *
+next_dirname(const char *s)
+{
+ char *cur;
+
+ cur = (char *)s;
+
+ if (*cur != '\0') {
+ for (; *cur != '/'; ++cur)
+ if (*cur == '\0')
+ return cur;
+
+ for (; *cur == '/'; ++cur)
+ ;
+ }
+
+ return cur;
+}
+
+static void
+add_namespace(const char *path)
+{
+ int nstype;
+ const char *nsdirname, *nsname, *cur;
+ struct namespace *namespace;
+
+ cur = (char *)path;
+ nsdirname = nsname = "";
+
+ while ((cur = next_dirname(cur))[0] != '\0') {
+ nsdirname = nsname;
+ nsname = cur;
+ }
+
+ if (!memcmp(nsdirname, "ipcns/", strlen("ipcns/")))
+ nstype = CLONE_NEWIPC;
+ else if (!memcmp(nsdirname, "netns/", strlen("netns/")))
+ nstype = CLONE_NEWNET;
+ else if (!memcmp(nsdirname, "utcns/", strlen("utcns/")))
+ nstype = CLONE_NEWUTS;
+ else
+ badusage("invalid namepspace path");
+
+ namespace = xmalloc(sizeof(*namespace));
+ namespace->path = (char *)path;
+ namespace->nstype = nstype;
+ LIST_INSERT_HEAD(&namespace_head, namespace, list);
+}
+
+#ifdef HAVE_LXC
+static void
+set_namespaces()
+{
+ struct namespace *namespace;
+ int fd;
+
+ LIST_FOREACH(namespace, &namespace_head, list) {
+ if ((fd = open(namespace->path, O_RDONLY)) == -1)
+ fatal("open namespace %s: %s", namespace->path, strerror(errno));
+ if (setns(fd, namespace->nstype) == -1)
+ fatal("setns %s: %s", namespace->path, strerror(errno));
+ }
+}
+#else
+static void
+set_namespaces()
+{
+ if (!LIST_EMPTY(&namespace_head))
+ fatal("LCX namespaces not supported");
+}
+#endif
+
+static void
+do_help(void)
+{
+ printf(
+"start-stop-daemon " VERSION " for Debian - small and fast C version written by\n"
+"Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>, public domain.\n"
+"\n"
+"Usage:\n"
+" start-stop-daemon -S|--start options ... -- arguments ...\n"
+" start-stop-daemon -K|--stop options ...\n"
+" start-stop-daemon -H|--help\n"
+" start-stop-daemon -V|--version\n"
+"\n"
+"Options (at least one of --exec|--pidfile|--user is required):\n"
+" -x|--exec <executable> program to start/check if it is running\n"
+" -p|--pidfile <pid-file> pid file to check\n"
+" -c|--chuid <name|uid[:group|gid]>\n"
+" change to this user/group before starting process\n"
+" -u|--user <username>|<uid> stop processes owned by this user\n"
+" -n|--name <process-name> stop processes with this name\n"
+" -s|--signal <signal> signal to send (default TERM)\n"
+" -a|--startas <pathname> program to start (default is <executable>)\n"
+" -N|--nicelevel <incr> add incr to the process's nice level\n"
+" -b|--background force the process to detach\n"
+" -m|--make-pidfile create the pidfile before starting\n"
+" -R|--retry <schedule> check whether processes die, and retry\n"
+" -t|--test test mode, don't do anything\n"
+" -o|--oknodo exit status 0 (not 1) if nothing done\n"
+" -q|--quiet be more quiet\n"
+" -v|--verbose be more verbose\n"
+"Retry <schedule> is <item>|/<item>/... where <item> is one of\n"
+" -<signal-num>|[-]<signal-name> send that signal\n"
+" <timeout> wait that many seconds\n"
+" forever repeat remainder forever\n"
+"or <schedule> may be just <timeout>, meaning <signal>/<timeout>/KILL/<timeout>\n"
+"\n"
+"Exit status: 0 = done 1 = nothing done (=> 0 if --oknodo)\n"
+" 3 = trouble 2 = with --retry, processes wouldn't die\n");
+}
+
+
+static void
+badusage(const char *msg)
+{
+ if (msg)
+ fprintf(stderr, "%s: %s\n", progname, msg);
+ fprintf(stderr, "Try `%s --help' for more information.\n", progname);
+ exit(3);
+}
+
+struct sigpair {
+ const char *name;
+ int signal;
+};
+
+const struct sigpair siglist[] = {
+ { "ABRT", SIGABRT },
+ { "ALRM", SIGALRM },
+ { "FPE", SIGFPE },
+ { "HUP", SIGHUP },
+ { "ILL", SIGILL },
+ { "INT", SIGINT },
+ { "KILL", SIGKILL },
+ { "PIPE", SIGPIPE },
+ { "QUIT", SIGQUIT },
+ { "SEGV", SIGSEGV },
+ { "TERM", SIGTERM },
+ { "USR1", SIGUSR1 },
+ { "USR2", SIGUSR2 },
+ { "CHLD", SIGCHLD },
+ { "CONT", SIGCONT },
+ { "STOP", SIGSTOP },
+ { "TSTP", SIGTSTP },
+ { "TTIN", SIGTTIN },
+ { "TTOU", SIGTTOU }
+};
+
+static int parse_integer (const char *string, int *value_r) {
+ unsigned long ul;
+ char *ep;
+
+ if (!string[0])
+ return -1;
+
+ ul= strtoul(string,&ep,10);
+ if (ul > INT_MAX || *ep != '\0')
+ return -1;
+
+ *value_r= ul;
+ return 0;
+}
+
+static int parse_signal (const char *signal_str, int *signal_nr)
+{
+ unsigned int i;
+
+ if (parse_integer(signal_str, signal_nr) == 0)
+ return 0;
+
+ for (i = 0; i < sizeof (siglist) / sizeof (siglist[0]); i++) {
+ if (strcmp (signal_str, siglist[i].name) == 0) {
+ *signal_nr = siglist[i].signal;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+static void
+parse_schedule_item(const char *string, struct schedule_item *item) {
+ const char *after_hyph;
+
+ if (!strcmp(string,"forever")) {
+ item->type = sched_forever;
+ } else if (isdigit(string[0])) {
+ item->type = sched_timeout;
+ if (parse_integer(string, &item->value) != 0)
+ badusage("invalid timeout value in schedule");
+ } else if ((after_hyph = string + (string[0] == '-')) &&
+ parse_signal(after_hyph, &item->value) == 0) {
+ item->type = sched_signal;
+ } else {
+ badusage("invalid schedule item (must be [-]<signal-name>, "
+ "-<signal-number>, <timeout> or `forever'");
+ }
+}
+
+static void
+parse_schedule(const char *schedule_str) {
+ char item_buf[20];
+ const char *slash;
+ int count, repeatat;
+ ptrdiff_t str_len;
+
+ count = 0;
+ for (slash = schedule_str; *slash; slash++)
+ if (*slash == '/')
+ count++;
+
+ schedule_length = (count == 0) ? 4 : count+1;
+ schedule = xmalloc(sizeof(*schedule) * schedule_length);
+
+ if (count == 0) {
+ schedule[0].type = sched_signal;
+ schedule[0].value = signal_nr;
+ parse_schedule_item(schedule_str, &schedule[1]);
+ if (schedule[1].type != sched_timeout) {
+ badusage ("--retry takes timeout, or schedule list"
+ " of at least two items");
+ }
+ schedule[2].type = sched_signal;
+ schedule[2].value = SIGKILL;
+ schedule[3]= schedule[1];
+ } else {
+ count = 0;
+ repeatat = -1;
+ while (schedule_str != NULL) {
+ slash = strchr(schedule_str,'/');
+ str_len = slash ? slash - schedule_str : (ptrdiff_t)strlen(schedule_str);
+ if (str_len >= (ptrdiff_t)sizeof(item_buf))
+ badusage("invalid schedule item: far too long"
+ " (you must delimit items with slashes)");
+ memcpy(item_buf, schedule_str, str_len);
+ item_buf[str_len] = 0;
+ schedule_str = slash ? slash+1 : NULL;
+
+ parse_schedule_item(item_buf, &schedule[count]);
+ if (schedule[count].type == sched_forever) {
+ if (repeatat >= 0)
+ badusage("invalid schedule: `forever'"
+ " appears more than once");
+ repeatat = count;
+ continue;
+ }
+ count++;
+ }
+ if (repeatat >= 0) {
+ schedule[count].type = sched_goto;
+ schedule[count].value = repeatat;
+ count++;
+ }
+ assert(count == schedule_length);
+ }
+}
+
+static void
+parse_options(int argc, char * const *argv)
+{
+ static struct option longopts[] = {
+ { "help", 0, NULL, 'H'},
+ { "stop", 0, NULL, 'K'},
+ { "start", 0, NULL, 'S'},
+ { "version", 0, NULL, 'V'},
+ { "startas", 1, NULL, 'a'},
+ { "name", 1, NULL, 'n'},
+ { "oknodo", 0, NULL, 'o'},
+ { "pidfile", 1, NULL, 'p'},
+ { "quiet", 0, NULL, 'q'},
+ { "signal", 1, NULL, 's'},
+ { "test", 0, NULL, 't'},
+ { "user", 1, NULL, 'u'},
+ { "chroot", 1, NULL, 'r'},
+ { "namespace", 1, NULL, 'd'},
+ { "verbose", 0, NULL, 'v'},
+ { "exec", 1, NULL, 'x'},
+ { "chuid", 1, NULL, 'c'},
+ { "nicelevel", 1, NULL, 'N'},
+ { "background", 0, NULL, 'b'},
+ { "make-pidfile", 0, NULL, 'm'},
+ { "retry", 1, NULL, 'R'},
+ { NULL, 0, NULL, 0}
+ };
+ int c;
+
+ for (;;) {
+ c = getopt_long(argc, argv, "HKSVa:n:op:qr:d:s:tu:vx:c:N:bmR:",
+ longopts, (int *) 0);
+ if (c == -1)
+ break;
+ switch (c) {
+ case 'H': /* --help */
+ do_help();
+ exit(0);
+ case 'K': /* --stop */
+ stop = 1;
+ break;
+ case 'S': /* --start */
+ start = 1;
+ break;
+ case 'V': /* --version */
+ printf("start-stop-daemon " VERSION "\n");
+ exit(0);
+ case 'a': /* --startas <pathname> */
+ startas = optarg;
+ break;
+ case 'n': /* --name <process-name> */
+ cmdname = optarg;
+ break;
+ case 'o': /* --oknodo */
+ exitnodo = 0;
+ break;
+ case 'p': /* --pidfile <pid-file> */
+ pidfile = optarg;
+ break;
+ case 'q': /* --quiet */
+ quietmode = 1;
+ break;
+ case 's': /* --signal <signal> */
+ signal_str = optarg;
+ break;
+ case 't': /* --test */
+ testmode = 1;
+ break;
+ case 'u': /* --user <username>|<uid> */
+ userspec = optarg;
+ break;
+ case 'v': /* --verbose */
+ quietmode = -1;
+ break;
+ case 'x': /* --exec <executable> */
+ execname = optarg;
+ break;
+ case 'c': /* --chuid <username>|<uid> */
+ /* we copy the string just in case we need the
+ * argument later. */
+ changeuser = strdup(optarg);
+ changeuser = strtok(changeuser, ":");
+ changegroup = strtok(NULL, ":");
+ break;
+ case 'r': /* --chroot /new/root */
+ changeroot = optarg;
+ break;
+ case 'd': /* --namespace /.../<ipcns>|<netns>|<utsns>/name */
+ add_namespace(optarg);
+ break;
+ case 'N': /* --nice */
+ nicelevel = atoi(optarg);
+ break;
+ case 'b': /* --background */
+ background = 1;
+ break;
+ case 'm': /* --make-pidfile */
+ mpidfile = 1;
+ break;
+ case 'R': /* --retry <schedule>|<timeout> */
+ schedule_str = optarg;
+ break;
+ default:
+ badusage(NULL); /* message printed by getopt */
+ }
+ }
+
+ if (signal_str != NULL) {
+ if (parse_signal (signal_str, &signal_nr) != 0)
+ badusage("signal value must be numeric or name"
+ " of signal (KILL, INTR, ...)");
+ }
+
+ if (schedule_str != NULL) {
+ parse_schedule(schedule_str);
+ }
+
+ if (start == stop)
+ badusage("need one of --start or --stop");
+
+ if (!execname && !pidfile && !userspec && !cmdname)
+ badusage("need at least one of --exec, --pidfile, --user or --name");
+
+ if (!startas)
+ startas = execname;
+
+ if (start && !startas)
+ badusage("--start needs --exec or --startas");
+
+ if (mpidfile && pidfile == NULL)
+ badusage("--make-pidfile is only relevant with --pidfile");
+
+ if (background && !start)
+ badusage("--background is only relevant with --start");
+
+}
+
+static int
+pid_is_exec(pid_t pid, const struct stat *esb)
+{
+ struct stat sb;
+ char buf[32];
+
+ sprintf(buf, "/proc/%d/exe", pid);
+ if (stat(buf, &sb) != 0)
+ return 0;
+ return (sb.st_dev == esb->st_dev && sb.st_ino == esb->st_ino);
+}
+
+
+static int
+pid_is_user(pid_t pid, uid_t 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(pid_t 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(pid_t pid)
+{
+ if (execname && !pid_is_exec(pid, &exec_stat))
+ return;
+ if (userspec && !pid_is_user(pid, user_id))
+ return;
+ if (cmdname && !pid_is_cmd(pid, cmdname))
+ return;
+ push(&found, pid);
+}
+
+static void
+do_pidfile(const char *name)
+{
+ FILE *f;
+ pid_t pid;
+
+ f = fopen(name, "r");
+ if (f) {
+ if (fscanf(f, "%d", &pid) == 1)
+ check(pid);
+ fclose(f);
+ } else if (errno != ENOENT)
+ fatal("open pidfile %s: %s", name, strerror(errno));
+
+}
+
+/* WTA: this needs to be an autoconf check for /proc/pid existance.
+ */
+static void
+do_procinit(void)
+{
+ DIR *procdir;
+ struct dirent *entry;
+ int foundany;
+ pid_t pid;
+
+ procdir = opendir("/proc");
+ if (!procdir)
+ fatal("opendir /proc: %s", strerror(errno));
+
+ foundany = 0;
+ while ((entry = readdir(procdir)) != NULL) {
+ if (sscanf(entry->d_name, "%d", &pid) != 1)
+ continue;
+ foundany++;
+ check(pid);
+ }
+ closedir(procdir);
+ if (!foundany)
+ fatal("nothing in /proc - not mounted?");
+}
+
+static void
+do_findprocs(void)
+{
+ clear(&found);
+
+ if (pidfile)
+ do_pidfile(pidfile);
+ else
+ do_procinit();
+}
+
+/* return 1 on failure */
+static void
+do_stop(int signal_nr, int quietmode, int *n_killed, int *n_notkilled, int retry_nr)
+{
+ struct pid_list *p;
+
+ do_findprocs();
+
+ *n_killed = 0;
+ *n_notkilled = 0;
+
+ if (!found)
+ return;
+
+ clear(&killed);
+
+ for (p = found; p; p = p->next) {
+ if (testmode)
+ printf("Would send signal %d to %d.\n",
+ signal_nr, p->pid);
+ else if (kill(p->pid, signal_nr) == 0) {
+ push(&killed, p->pid);
+ (*n_killed)++;
+ } else {
+ printf("%s: warning: failed to kill %d: %s\n",
+ progname, p->pid, strerror(errno));
+ (*n_notkilled)++;
+ }
+ }
+ if (quietmode < 0 && killed) {
+ printf("Stopped %s (pid", what_stop);
+ for (p = killed; p; p = p->next)
+ printf(" %d", p->pid);
+ putchar(')');
+ if (retry_nr > 0)
+ printf(", retry #%d", retry_nr);
+ printf(".\n");
+ }
+}
+
+
+static void
+set_what_stop(const char *str)
+{
+ strncpy(what_stop, str, sizeof(what_stop));
+ what_stop[sizeof(what_stop)-1] = '\0';
+}
+
+static int
+run_stop_schedule(void)
+{
+ int r, position, n_killed, n_notkilled, value, ratio, anykilled, retry_nr;
+ struct timeval stopat, before, after, interval, maxinterval;
+
+ if (testmode) {
+ if (schedule != NULL) {
+ printf("Ignoring --retry in test mode\n");
+ schedule = NULL;
+ }
+ }
+
+ if (cmdname)
+ set_what_stop(cmdname);
+ else if (execname)
+ set_what_stop(execname);
+ else if (pidfile)
+ sprintf(what_stop, "process in pidfile `%.200s'", pidfile);
+ else if (userspec)
+ sprintf(what_stop, "process(es) owned by `%.200s'", userspec);
+ else
+ fatal("internal error, please report");
+
+ anykilled = 0;
+ retry_nr = 0;
+
+ if (schedule == NULL) {
+ do_stop(signal_nr, quietmode, &n_killed, &n_notkilled, 0);
+ if (n_notkilled > 0 && quietmode <= 0)
+ printf("%d pids were not killed\n", n_notkilled);
+ if (n_killed)
+ anykilled = 1;
+ goto x_finished;
+ }
+
+ for (position = 0; position < schedule_length; ) {
+ value= schedule[position].value;
+ n_notkilled = 0;
+
+ switch (schedule[position].type) {
+
+ case sched_goto:
+ position = value;
+ continue;
+
+ case sched_signal:
+ do_stop(value, quietmode, &n_killed, &n_notkilled, retry_nr++);
+ if (!n_killed)
+ goto x_finished;
+ else
+ anykilled = 1;
+ goto next_item;
+
+ case sched_timeout:
+ /* We want to keep polling for the processes, to see if they've exited,
+ * or until the timeout expires.
+ *
+ * This is a somewhat complicated algorithm to try to ensure that we
+ * notice reasonably quickly when all the processes have exited, but
+ * don't spend too much CPU time polling. In particular, on a fast
+ * machine with quick-exiting daemons we don't want to delay system
+ * shutdown too much, whereas on a slow one, or where processes are
+ * taking some time to exit, we want to increase the polling
+ * interval.
+ *
+ * The algorithm is as follows: we measure the elapsed time it takes
+ * to do one poll(), and wait a multiple of this time for the next
+ * poll. However, if that would put us past the end of the timeout
+ * period we wait only as long as the timeout period, but in any case
+ * we always wait at least MIN_POLL_INTERVAL (20ms). The multiple
+ * (`ratio') starts out as 2, and increases by 1 for each poll to a
+ * maximum of 10; so we use up to between 30% and 10% of the
+ * machine's resources (assuming a few reasonable things about system
+ * performance).
+ */
+ xgettimeofday(&stopat);
+ stopat.tv_sec += value;
+ ratio = 1;
+ for (;;) {
+ xgettimeofday(&before);
+ if (timercmp(&before,&stopat,>))
+ goto next_item;
+
+ do_stop(0, 1, &n_killed, &n_notkilled, 0);
+ if (!n_killed)
+ goto x_finished;
+
+ xgettimeofday(&after);
+
+ if (!timercmp(&after,&stopat,<))
+ goto next_item;
+
+ if (ratio < 10)
+ ratio++;
+
+ TVCALC(interval, ratio * (TVELEM(&after) - TVELEM(&before) + TVADJUST));
+ TVCALC(maxinterval, TVELEM(&stopat) - TVELEM(&after) + TVADJUST);
+
+ if (timercmp(&interval,&maxinterval,>))
+ interval = maxinterval;
+
+ if (interval.tv_sec == 0 &&
+ interval.tv_usec <= MIN_POLL_INTERVAL)
+ interval.tv_usec = MIN_POLL_INTERVAL;
+
+ r = select(0,0,0,0,&interval);
+ if (r < 0 && errno != EINTR)
+ fatal("select() failed for pause: %s",
+ strerror(errno));
+ }
+
+ default:
+ assert(!"schedule[].type value must be valid");
+
+ }
+
+ next_item:
+ position++;
+ }
+
+ if (quietmode <= 0)
+ printf("Program %s, %d process(es), refused to die.\n",
+ what_stop, n_killed);
+
+ return 2;
+
+x_finished:
+ if (!anykilled) {
+ if (quietmode <= 0)
+ printf("No %s found running; none killed.\n", what_stop);
+ return exitnodo;
+ } else {
+ return 0;
+ }
+}
+
+/*
+int main(int argc, char **argv) NONRETURNING;
+*/
+
+int
+main(int argc, char **argv)
+{
+ progname = argv[0];
+
+ LIST_INIT(&namespace_head);
+
+ parse_options(argc, argv);
+ argc -= optind;
+ argv += optind;
+
+ if (execname && stat(execname, &exec_stat))
+ fatal("stat %s: %s", execname, strerror(errno));
+
+ if (userspec && sscanf(userspec, "%d", &user_id) != 1) {
+ struct passwd *pw;
+
+ pw = getpwnam(userspec);
+ if (!pw)
+ fatal("user `%s' not found\n", userspec);
+
+ user_id = pw->pw_uid;
+ }
+
+ if (changegroup && sscanf(changegroup, "%d", &runas_gid) != 1) {
+ struct group *gr = getgrnam(changegroup);
+ if (!gr)
+ fatal("group `%s' not found\n", changegroup);
+ runas_gid = gr->gr_gid;
+ }
+ if (changeuser && sscanf(changeuser, "%d", &runas_uid) != 1) {
+ struct passwd *pw = getpwnam(changeuser);
+ if (!pw)
+ fatal("user `%s' not found\n", changeuser);
+ runas_uid = pw->pw_uid;
+ if (changegroup == NULL) { /* pass the default group of this user */
+ changegroup = ""; /* just empty */
+ runas_gid = pw->pw_gid;
+ }
+ }
+
+ if (stop) {
+ int i = run_stop_schedule();
+ exit(i);
+ }
+
+ do_findprocs();
+
+ if (found) {
+ if (quietmode <= 0)
+ printf("%s already running.\n", execname);
+ exit(exitnodo);
+ }
+ if (testmode) {
+ printf("Would start %s ", startas);
+ while (argc-- > 0)
+ printf("%s ", *argv++);
+ if (changeuser != NULL) {
+ printf(" (as user %s[%d]", changeuser, runas_uid);
+ if (changegroup != NULL)
+ printf(", and group %s[%d])", changegroup, runas_gid);
+ else
+ printf(")");
+ }
+ if (changeroot != NULL)
+ printf(" in directory %s", changeroot);
+ if (nicelevel)
+ printf(", and add %i to the priority", nicelevel);
+ printf(".\n");
+ exit(0);
+ }
+ if (quietmode < 0)
+ printf("Starting %s...\n", startas);
+ *--argv = startas;
+ if (changeroot != NULL) {
+ if (chdir(changeroot) < 0)
+ fatal("Unable to chdir() to %s", changeroot);
+ if (chroot(changeroot) < 0)
+ fatal("Unable to chroot() to %s", changeroot);
+ }
+ if (changeuser != NULL) {
+ if (setgid(runas_gid))
+ fatal("Unable to set gid to %d", runas_gid);
+ if (initgroups(changeuser, runas_gid))
+ fatal("Unable to set initgroups() with gid %d", runas_gid);
+ if (setuid(runas_uid))
+ fatal("Unable to set uid to %s", changeuser);
+ }
+
+ if (background) { /* ok, we need to detach this process */
+ int i, fd;
+ if (quietmode < 0)
+ printf("Detatching to start %s...", startas);
+ i = fork();
+ if (i<0) {
+ fatal("Unable to fork.\n");
+ }
+ if (i) { /* parent */
+ if (quietmode < 0)
+ printf("done.\n");
+ exit(0);
+ }
+ /* child continues here */
+ /* now close all extra fds */
+ for (i=getdtablesize()-1; i>=0; --i) close(i);
+ /* change tty */
+ fd = open("/dev/tty", O_RDWR);
+ ioctl(fd, TIOCNOTTY, 0);
+ close(fd);
+ chdir("/");
+ umask(022); /* set a default for dumb programs */
+ setpgid(0,0); /* set the process group */
+ fd=open("/dev/null", O_RDWR); /* stdin */
+ dup(fd); /* stdout */
+ dup(fd); /* stderr */
+ }
+ if (nicelevel) {
+ errno = 0;
+ if (nice(nicelevel) < 0 && errno)
+ fatal("Unable to alter nice level by %i: %s", nicelevel,
+ strerror(errno));
+ }
+ if (mpidfile && pidfile != NULL) { /* user wants _us_ to make the pidfile :) */
+ FILE *pidf = fopen(pidfile, "w");
+ pid_t pidt = getpid();
+ if (pidf == NULL)
+ fatal("Unable to open pidfile `%s' for writing: %s", pidfile,
+ strerror(errno));
+ fprintf(pidf, "%d\n", pidt);
+ fclose(pidf);
+ }
+ set_namespaces();
+ execv(startas, argv);
+ fatal("Unable to start %s: %s", startas, strerror(errno));
+}
projects / mirror / frr.git / commitdiff