[3320] | 1 | /*
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| 2 | Copyright (c) 2001-2006, Gerrit Pape
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| 3 | All rights reserved.
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| 4 |
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| 5 | Redistribution and use in source and binary forms, with or without
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| 6 | modification, are permitted provided that the following conditions are met:
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| 7 |
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| 8 | 1. Redistributions of source code must retain the above copyright notice,
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| 9 | this list of conditions and the following disclaimer.
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| 10 | 2. Redistributions in binary form must reproduce the above copyright
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| 11 | notice, this list of conditions and the following disclaimer in the
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| 12 | documentation and/or other materials provided with the distribution.
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| 13 | 3. The name of the author may not be used to endorse or promote products
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| 14 | derived from this software without specific prior written permission.
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| 15 |
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| 16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 18 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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| 19 | EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 20 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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| 22 | OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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| 23 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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| 24 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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| 25 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 26 | */
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| 27 |
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| 28 | /* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */
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| 29 | /* TODO: depends on runit_lib.c - review and reduce/eliminate */
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| 30 |
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| 31 | #include <sys/poll.h>
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| 32 | #include <sys/file.h>
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| 33 | #include "libbb.h"
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| 34 | #include "runit_lib.h"
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| 35 |
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| 36 | #if ENABLE_MONOTONIC_SYSCALL
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| 37 | #include <sys/syscall.h>
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| 38 |
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| 39 | /* libc has incredibly messy way of doing this,
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| 40 | * typically requiring -lrt. We just skip all this mess */
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| 41 | static void gettimeofday_ns(struct timespec *ts)
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| 42 | {
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| 43 | syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
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| 44 | }
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| 45 | #else
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| 46 | static void gettimeofday_ns(struct timespec *ts)
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| 47 | {
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| 48 | if (sizeof(struct timeval) == sizeof(struct timespec)
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| 49 | && sizeof(((struct timeval*)ts)->tv_usec) == sizeof(ts->tv_nsec)
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| 50 | ) {
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| 51 | /* Cheat */
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| 52 | gettimeofday((void*)ts, NULL);
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| 53 | ts->tv_nsec *= 1000;
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| 54 | } else {
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| 55 | extern void BUG_need_to_implement_gettimeofday_ns(void);
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| 56 | BUG_need_to_implement_gettimeofday_ns();
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| 57 | }
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| 58 | }
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| 59 | #endif
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| 60 |
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| 61 | /* Compare possibly overflowing unsigned counters */
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| 62 | #define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
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| 63 |
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| 64 | /* state */
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| 65 | #define S_DOWN 0
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| 66 | #define S_RUN 1
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| 67 | #define S_FINISH 2
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| 68 | /* ctrl */
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| 69 | #define C_NOOP 0
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| 70 | #define C_TERM 1
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| 71 | #define C_PAUSE 2
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| 72 | /* want */
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| 73 | #define W_UP 0
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| 74 | #define W_DOWN 1
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| 75 | #define W_EXIT 2
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| 76 |
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| 77 | struct svdir {
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| 78 | int pid;
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| 79 | smallint state;
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| 80 | smallint ctrl;
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| 81 | smallint sd_want;
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| 82 | smallint islog;
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| 83 | struct timespec start;
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| 84 | int fdlock;
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| 85 | int fdcontrol;
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| 86 | int fdcontrolwrite;
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| 87 | int wstat;
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| 88 | };
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| 89 |
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| 90 | struct globals {
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| 91 | smallint haslog;
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| 92 | smallint sigterm;
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| 93 | smallint pidchanged;
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| 94 | struct fd_pair selfpipe;
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| 95 | struct fd_pair logpipe;
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| 96 | char *dir;
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| 97 | struct svdir svd[2];
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| 98 | } FIX_ALIASING;
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| 99 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 100 | #define haslog (G.haslog )
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| 101 | #define sigterm (G.sigterm )
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| 102 | #define pidchanged (G.pidchanged )
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| 103 | #define selfpipe (G.selfpipe )
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| 104 | #define logpipe (G.logpipe )
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| 105 | #define dir (G.dir )
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| 106 | #define svd (G.svd )
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| 107 | #define INIT_G() do { \
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| 108 | pidchanged = 1; \
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| 109 | } while (0)
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| 110 |
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| 111 | static void fatal2_cannot(const char *m1, const char *m2)
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| 112 | {
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| 113 | bb_perror_msg_and_die("%s: fatal: cannot %s%s", dir, m1, m2);
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| 114 | /* was exiting 111 */
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| 115 | }
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| 116 | static void fatal_cannot(const char *m)
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| 117 | {
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| 118 | fatal2_cannot(m, "");
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| 119 | /* was exiting 111 */
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| 120 | }
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| 121 | static void fatal2x_cannot(const char *m1, const char *m2)
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| 122 | {
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| 123 | bb_error_msg_and_die("%s: fatal: cannot %s%s", dir, m1, m2);
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| 124 | /* was exiting 111 */
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| 125 | }
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| 126 | static void warn_cannot(const char *m)
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| 127 | {
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| 128 | bb_perror_msg("%s: warning: cannot %s", dir, m);
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| 129 | }
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| 130 |
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| 131 | static void s_child(int sig_no UNUSED_PARAM)
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| 132 | {
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| 133 | write(selfpipe.wr, "", 1);
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| 134 | }
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| 135 |
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| 136 | static void s_term(int sig_no UNUSED_PARAM)
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| 137 | {
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| 138 | sigterm = 1;
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| 139 | write(selfpipe.wr, "", 1); /* XXX */
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| 140 | }
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| 141 |
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| 142 | /* libbb candidate */
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| 143 | static char *bb_stpcpy(char *p, const char *to_add)
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| 144 | {
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| 145 | while ((*p = *to_add) != '\0') {
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| 146 | p++;
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| 147 | to_add++;
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| 148 | }
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| 149 | return p;
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| 150 | }
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| 151 |
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| 152 | static int open_trunc_or_warn(const char *name)
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| 153 | {
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| 154 | /* Why O_NDELAY? */
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| 155 | int fd = open(name, O_WRONLY | O_NDELAY | O_TRUNC | O_CREAT, 0644);
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| 156 | if (fd < 0)
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| 157 | bb_perror_msg("%s: warning: cannot open %s",
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| 158 | dir, name);
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| 159 | return fd;
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| 160 | }
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| 161 |
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| 162 | static void update_status(struct svdir *s)
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| 163 | {
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| 164 | ssize_t sz;
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| 165 | int fd;
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| 166 | svstatus_t status;
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| 167 |
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| 168 | /* pid */
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| 169 | if (pidchanged) {
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| 170 | fd = open_trunc_or_warn("supervise/pid.new");
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| 171 | if (fd < 0)
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| 172 | return;
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| 173 | if (s->pid) {
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| 174 | char spid[sizeof(int)*3 + 2];
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| 175 | int size = sprintf(spid, "%u\n", (unsigned)s->pid);
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| 176 | write(fd, spid, size);
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| 177 | }
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| 178 | close(fd);
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| 179 | if (rename_or_warn("supervise/pid.new",
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| 180 | s->islog ? "log/supervise/pid" : "log/supervise/pid"+4))
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| 181 | return;
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| 182 | pidchanged = 0;
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| 183 | }
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| 184 |
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| 185 | /* stat */
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| 186 | fd = open_trunc_or_warn("supervise/stat.new");
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| 187 | if (fd < -1)
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| 188 | return;
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| 189 |
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| 190 | {
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| 191 | char stat_buf[sizeof("finish, paused, got TERM, want down\n")];
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| 192 | char *p = stat_buf;
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| 193 | switch (s->state) {
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| 194 | case S_DOWN:
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| 195 | p = bb_stpcpy(p, "down");
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| 196 | break;
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| 197 | case S_RUN:
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| 198 | p = bb_stpcpy(p, "run");
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| 199 | break;
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| 200 | case S_FINISH:
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| 201 | p = bb_stpcpy(p, "finish");
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| 202 | break;
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| 203 | }
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| 204 | if (s->ctrl & C_PAUSE)
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| 205 | p = bb_stpcpy(p, ", paused");
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| 206 | if (s->ctrl & C_TERM)
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| 207 | p = bb_stpcpy(p, ", got TERM");
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| 208 | if (s->state != S_DOWN)
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| 209 | switch (s->sd_want) {
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| 210 | case W_DOWN:
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| 211 | p = bb_stpcpy(p, ", want down");
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| 212 | break;
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| 213 | case W_EXIT:
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| 214 | p = bb_stpcpy(p, ", want exit");
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| 215 | break;
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| 216 | }
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| 217 | *p++ = '\n';
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| 218 | write(fd, stat_buf, p - stat_buf);
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| 219 | close(fd);
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| 220 | }
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| 221 |
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| 222 | rename_or_warn("supervise/stat.new",
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| 223 | s->islog ? "log/supervise/stat" : "log/supervise/stat"+4);
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| 224 |
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| 225 | /* supervise compatibility */
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| 226 | memset(&status, 0, sizeof(status));
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| 227 | status.time_be64 = SWAP_BE64(s->start.tv_sec + 0x400000000000000aULL);
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| 228 | status.time_nsec_be32 = SWAP_BE32(s->start.tv_nsec);
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| 229 | status.pid_le32 = SWAP_LE32(s->pid);
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| 230 | if (s->ctrl & C_PAUSE)
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| 231 | status.paused = 1;
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| 232 | if (s->sd_want == W_UP)
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| 233 | status.want = 'u';
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| 234 | else
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| 235 | status.want = 'd';
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| 236 | if (s->ctrl & C_TERM)
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| 237 | status.got_term = 1;
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| 238 | status.run_or_finish = s->state;
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| 239 | fd = open_trunc_or_warn("supervise/status.new");
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| 240 | if (fd < 0)
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| 241 | return;
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| 242 | sz = write(fd, &status, sizeof(status));
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| 243 | close(fd);
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| 244 | if (sz != sizeof(status)) {
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| 245 | warn_cannot("write supervise/status.new");
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| 246 | unlink("supervise/status.new");
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| 247 | return;
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| 248 | }
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| 249 | rename_or_warn("supervise/status.new",
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| 250 | s->islog ? "log/supervise/status" : "log/supervise/status"+4);
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| 251 | }
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| 252 |
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| 253 | static unsigned custom(struct svdir *s, char c)
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| 254 | {
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| 255 | pid_t pid;
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| 256 | int w;
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| 257 | char a[10];
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| 258 | struct stat st;
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| 259 |
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| 260 | if (s->islog)
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| 261 | return 0;
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| 262 | strcpy(a, "control/?");
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| 263 | a[8] = c; /* replace '?' */
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| 264 | if (stat(a, &st) == 0) {
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| 265 | if (st.st_mode & S_IXUSR) {
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| 266 | pid = vfork();
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| 267 | if (pid == -1) {
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| 268 | warn_cannot("vfork for control/?");
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| 269 | return 0;
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| 270 | }
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| 271 | if (pid == 0) {
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| 272 | /* child */
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| 273 | if (haslog && dup2(logpipe.wr, 1) == -1)
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| 274 | warn_cannot("setup stdout for control/?");
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| 275 | execl(a, a, (char *) NULL);
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| 276 | fatal_cannot("run control/?");
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| 277 | }
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| 278 | /* parent */
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| 279 | if (safe_waitpid(pid, &w, 0) == -1) {
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| 280 | warn_cannot("wait for child control/?");
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| 281 | return 0;
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| 282 | }
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| 283 | return WEXITSTATUS(w) == 0;
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| 284 | }
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| 285 | } else {
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| 286 | if (errno != ENOENT)
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| 287 | warn_cannot("stat control/?");
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| 288 | }
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| 289 | return 0;
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| 290 | }
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| 291 |
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| 292 | static void stopservice(struct svdir *s)
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| 293 | {
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| 294 | if (s->pid && !custom(s, 't')) {
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| 295 | kill(s->pid, SIGTERM);
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| 296 | s->ctrl |= C_TERM;
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| 297 | update_status(s);
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| 298 | }
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| 299 | if (s->sd_want == W_DOWN) {
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| 300 | kill(s->pid, SIGCONT);
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| 301 | custom(s, 'd');
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| 302 | return;
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| 303 | }
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| 304 | if (s->sd_want == W_EXIT) {
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| 305 | kill(s->pid, SIGCONT);
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| 306 | custom(s, 'x');
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| 307 | }
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| 308 | }
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| 309 |
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| 310 | static void startservice(struct svdir *s)
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| 311 | {
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| 312 | int p;
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| 313 | const char *arg[4];
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| 314 | char exitcode[sizeof(int)*3 + 2];
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| 315 |
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| 316 | if (s->state == S_FINISH) {
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| 317 | /* Two arguments are given to ./finish. The first one is ./run exit code,
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| 318 | * or -1 if ./run didnt exit normally. The second one is
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| 319 | * the least significant byte of the exit status as determined by waitpid;
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| 320 | * for instance it is 0 if ./run exited normally, and the signal number
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| 321 | * if ./run was terminated by a signal. If runsv cannot start ./run
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| 322 | * for some reason, the exit code is 111 and the status is 0.
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| 323 | */
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| 324 | arg[0] = "./finish";
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| 325 | arg[1] = "-1";
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| 326 | if (WIFEXITED(s->wstat)) {
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| 327 | *utoa_to_buf(WEXITSTATUS(s->wstat), exitcode, sizeof(exitcode)) = '\0';
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| 328 | arg[1] = exitcode;
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| 329 | }
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| 330 | //arg[2] = "0";
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| 331 | //if (WIFSIGNALED(s->wstat)) {
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| 332 | arg[2] = utoa(WTERMSIG(s->wstat));
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| 333 | //}
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| 334 | arg[3] = NULL;
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| 335 | } else {
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| 336 | arg[0] = "./run";
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| 337 | arg[1] = NULL;
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| 338 | custom(s, 'u');
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| 339 | }
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| 340 |
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| 341 | if (s->pid != 0)
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| 342 | stopservice(s); /* should never happen */
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| 343 | while ((p = vfork()) == -1) {
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| 344 | warn_cannot("vfork, sleeping");
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| 345 | sleep(5);
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| 346 | }
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| 347 | if (p == 0) {
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| 348 | /* child */
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| 349 | if (haslog) {
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| 350 | /* NB: bug alert! right order is close, then dup2 */
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| 351 | if (s->islog) {
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| 352 | xchdir("./log");
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| 353 | close(logpipe.wr);
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| 354 | xdup2(logpipe.rd, 0);
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| 355 | } else {
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| 356 | close(logpipe.rd);
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| 357 | xdup2(logpipe.wr, 1);
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| 358 | }
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| 359 | }
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| 360 | /* Non-ignored signals revert to SIG_DFL on exec anyway */
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| 361 | /*bb_signals(0
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| 362 | + (1 << SIGCHLD)
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| 363 | + (1 << SIGTERM)
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| 364 | , SIG_DFL);*/
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| 365 | sig_unblock(SIGCHLD);
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| 366 | sig_unblock(SIGTERM);
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| 367 | execv(arg[0], (char**) arg);
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| 368 | fatal2_cannot(s->islog ? "start log/" : "start ", arg[0]);
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| 369 | }
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| 370 | /* parent */
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| 371 | if (s->state != S_FINISH) {
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| 372 | gettimeofday_ns(&s->start);
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| 373 | s->state = S_RUN;
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| 374 | }
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| 375 | s->pid = p;
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| 376 | pidchanged = 1;
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| 377 | s->ctrl = C_NOOP;
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| 378 | update_status(s);
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| 379 | }
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| 380 |
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| 381 | static int ctrl(struct svdir *s, char c)
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| 382 | {
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| 383 | int sig;
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| 384 |
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| 385 | switch (c) {
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| 386 | case 'd': /* down */
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| 387 | s->sd_want = W_DOWN;
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| 388 | update_status(s);
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| 389 | if (s->pid && s->state != S_FINISH)
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| 390 | stopservice(s);
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| 391 | break;
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| 392 | case 'u': /* up */
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| 393 | s->sd_want = W_UP;
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| 394 | update_status(s);
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| 395 | if (s->pid == 0)
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| 396 | startservice(s);
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| 397 | break;
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| 398 | case 'x': /* exit */
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| 399 | if (s->islog)
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| 400 | break;
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| 401 | s->sd_want = W_EXIT;
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| 402 | update_status(s);
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| 403 | /* FALLTHROUGH */
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| 404 | case 't': /* sig term */
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| 405 | if (s->pid && s->state != S_FINISH)
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| 406 | stopservice(s);
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| 407 | break;
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| 408 | case 'k': /* sig kill */
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| 409 | if (s->pid && !custom(s, c))
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| 410 | kill(s->pid, SIGKILL);
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| 411 | s->state = S_DOWN;
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| 412 | break;
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| 413 | case 'p': /* sig pause */
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| 414 | if (s->pid && !custom(s, c))
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| 415 | kill(s->pid, SIGSTOP);
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| 416 | s->ctrl |= C_PAUSE;
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| 417 | update_status(s);
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| 418 | break;
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| 419 | case 'c': /* sig cont */
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| 420 | if (s->pid && !custom(s, c))
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| 421 | kill(s->pid, SIGCONT);
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| 422 | s->ctrl &= ~C_PAUSE;
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| 423 | update_status(s);
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| 424 | break;
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| 425 | case 'o': /* once */
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| 426 | s->sd_want = W_DOWN;
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| 427 | update_status(s);
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| 428 | if (!s->pid)
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| 429 | startservice(s);
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| 430 | break;
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| 431 | case 'a': /* sig alarm */
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| 432 | sig = SIGALRM;
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| 433 | goto sendsig;
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| 434 | case 'h': /* sig hup */
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| 435 | sig = SIGHUP;
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| 436 | goto sendsig;
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| 437 | case 'i': /* sig int */
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| 438 | sig = SIGINT;
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| 439 | goto sendsig;
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| 440 | case 'q': /* sig quit */
|
---|
| 441 | sig = SIGQUIT;
|
---|
| 442 | goto sendsig;
|
---|
| 443 | case '1': /* sig usr1 */
|
---|
| 444 | sig = SIGUSR1;
|
---|
| 445 | goto sendsig;
|
---|
| 446 | case '2': /* sig usr2 */
|
---|
| 447 | sig = SIGUSR2;
|
---|
| 448 | goto sendsig;
|
---|
| 449 | }
|
---|
| 450 | return 1;
|
---|
| 451 | sendsig:
|
---|
| 452 | if (s->pid && !custom(s, c))
|
---|
| 453 | kill(s->pid, sig);
|
---|
| 454 | return 1;
|
---|
| 455 | }
|
---|
| 456 |
|
---|
| 457 | int runsv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 458 | int runsv_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 459 | {
|
---|
| 460 | struct stat s;
|
---|
| 461 | int fd;
|
---|
| 462 | int r;
|
---|
| 463 | char buf[256];
|
---|
| 464 |
|
---|
| 465 | INIT_G();
|
---|
| 466 |
|
---|
| 467 | dir = single_argv(argv);
|
---|
| 468 |
|
---|
| 469 | xpiped_pair(selfpipe);
|
---|
| 470 | close_on_exec_on(selfpipe.rd);
|
---|
| 471 | close_on_exec_on(selfpipe.wr);
|
---|
| 472 | ndelay_on(selfpipe.rd);
|
---|
| 473 | ndelay_on(selfpipe.wr);
|
---|
| 474 |
|
---|
| 475 | sig_block(SIGCHLD);
|
---|
| 476 | bb_signals_recursive_norestart(1 << SIGCHLD, s_child);
|
---|
| 477 | sig_block(SIGTERM);
|
---|
| 478 | bb_signals_recursive_norestart(1 << SIGTERM, s_term);
|
---|
| 479 |
|
---|
| 480 | xchdir(dir);
|
---|
| 481 | /* bss: svd[0].pid = 0; */
|
---|
| 482 | if (S_DOWN) svd[0].state = S_DOWN; /* otherwise already 0 (bss) */
|
---|
| 483 | if (C_NOOP) svd[0].ctrl = C_NOOP;
|
---|
| 484 | if (W_UP) svd[0].sd_want = W_UP;
|
---|
| 485 | /* bss: svd[0].islog = 0; */
|
---|
| 486 | /* bss: svd[1].pid = 0; */
|
---|
| 487 | gettimeofday_ns(&svd[0].start);
|
---|
| 488 | if (stat("down", &s) != -1)
|
---|
| 489 | svd[0].sd_want = W_DOWN;
|
---|
| 490 |
|
---|
| 491 | if (stat("log", &s) == -1) {
|
---|
| 492 | if (errno != ENOENT)
|
---|
| 493 | warn_cannot("stat ./log");
|
---|
| 494 | } else {
|
---|
| 495 | if (!S_ISDIR(s.st_mode)) {
|
---|
| 496 | errno = 0;
|
---|
| 497 | warn_cannot("stat log/down: log is not a directory");
|
---|
| 498 | } else {
|
---|
| 499 | haslog = 1;
|
---|
| 500 | svd[1].state = S_DOWN;
|
---|
| 501 | svd[1].ctrl = C_NOOP;
|
---|
| 502 | svd[1].sd_want = W_UP;
|
---|
| 503 | svd[1].islog = 1;
|
---|
| 504 | gettimeofday_ns(&svd[1].start);
|
---|
| 505 | if (stat("log/down", &s) != -1)
|
---|
| 506 | svd[1].sd_want = W_DOWN;
|
---|
| 507 | xpiped_pair(logpipe);
|
---|
| 508 | close_on_exec_on(logpipe.rd);
|
---|
| 509 | close_on_exec_on(logpipe.wr);
|
---|
| 510 | }
|
---|
| 511 | }
|
---|
| 512 |
|
---|
| 513 | if (mkdir("supervise", 0700) == -1) {
|
---|
| 514 | r = readlink("supervise", buf, sizeof(buf));
|
---|
| 515 | if (r != -1) {
|
---|
| 516 | if (r == sizeof(buf))
|
---|
| 517 | fatal2x_cannot("readlink ./supervise", ": name too long");
|
---|
| 518 | buf[r] = 0;
|
---|
| 519 | mkdir(buf, 0700);
|
---|
| 520 | } else {
|
---|
| 521 | if ((errno != ENOENT) && (errno != EINVAL))
|
---|
| 522 | fatal_cannot("readlink ./supervise");
|
---|
| 523 | }
|
---|
| 524 | }
|
---|
| 525 | svd[0].fdlock = xopen3("log/supervise/lock"+4,
|
---|
| 526 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
|
---|
| 527 | if (flock(svd[0].fdlock, LOCK_EX | LOCK_NB) == -1)
|
---|
| 528 | fatal_cannot("lock supervise/lock");
|
---|
| 529 | close_on_exec_on(svd[0].fdlock);
|
---|
| 530 | if (haslog) {
|
---|
| 531 | if (mkdir("log/supervise", 0700) == -1) {
|
---|
| 532 | r = readlink("log/supervise", buf, 256);
|
---|
| 533 | if (r != -1) {
|
---|
| 534 | if (r == 256)
|
---|
| 535 | fatal2x_cannot("readlink ./log/supervise", ": name too long");
|
---|
| 536 | buf[r] = 0;
|
---|
| 537 | fd = xopen(".", O_RDONLY|O_NDELAY);
|
---|
| 538 | xchdir("./log");
|
---|
| 539 | mkdir(buf, 0700);
|
---|
| 540 | if (fchdir(fd) == -1)
|
---|
| 541 | fatal_cannot("change back to service directory");
|
---|
| 542 | close(fd);
|
---|
| 543 | }
|
---|
| 544 | else {
|
---|
| 545 | if ((errno != ENOENT) && (errno != EINVAL))
|
---|
| 546 | fatal_cannot("readlink ./log/supervise");
|
---|
| 547 | }
|
---|
| 548 | }
|
---|
| 549 | svd[1].fdlock = xopen3("log/supervise/lock",
|
---|
| 550 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
|
---|
| 551 | if (flock(svd[1].fdlock, LOCK_EX) == -1)
|
---|
| 552 | fatal_cannot("lock log/supervise/lock");
|
---|
| 553 | close_on_exec_on(svd[1].fdlock);
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 | mkfifo("log/supervise/control"+4, 0600);
|
---|
| 557 | svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY);
|
---|
| 558 | close_on_exec_on(svd[0].fdcontrol);
|
---|
| 559 | svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY);
|
---|
| 560 | close_on_exec_on(svd[0].fdcontrolwrite);
|
---|
| 561 | update_status(&svd[0]);
|
---|
| 562 | if (haslog) {
|
---|
| 563 | mkfifo("log/supervise/control", 0600);
|
---|
| 564 | svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY);
|
---|
| 565 | close_on_exec_on(svd[1].fdcontrol);
|
---|
| 566 | svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY);
|
---|
| 567 | close_on_exec_on(svd[1].fdcontrolwrite);
|
---|
| 568 | update_status(&svd[1]);
|
---|
| 569 | }
|
---|
| 570 | mkfifo("log/supervise/ok"+4, 0600);
|
---|
| 571 | fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY);
|
---|
| 572 | close_on_exec_on(fd);
|
---|
| 573 | if (haslog) {
|
---|
| 574 | mkfifo("log/supervise/ok", 0600);
|
---|
| 575 | fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY);
|
---|
| 576 | close_on_exec_on(fd);
|
---|
| 577 | }
|
---|
| 578 | for (;;) {
|
---|
| 579 | struct pollfd x[3];
|
---|
| 580 | unsigned deadline;
|
---|
| 581 | char ch;
|
---|
| 582 |
|
---|
| 583 | if (haslog)
|
---|
| 584 | if (!svd[1].pid && svd[1].sd_want == W_UP)
|
---|
| 585 | startservice(&svd[1]);
|
---|
| 586 | if (!svd[0].pid)
|
---|
| 587 | if (svd[0].sd_want == W_UP || svd[0].state == S_FINISH)
|
---|
| 588 | startservice(&svd[0]);
|
---|
| 589 |
|
---|
| 590 | x[0].fd = selfpipe.rd;
|
---|
| 591 | x[0].events = POLLIN;
|
---|
| 592 | x[1].fd = svd[0].fdcontrol;
|
---|
| 593 | x[1].events = POLLIN;
|
---|
| 594 | /* x[2] is used only if haslog == 1 */
|
---|
| 595 | x[2].fd = svd[1].fdcontrol;
|
---|
| 596 | x[2].events = POLLIN;
|
---|
| 597 | sig_unblock(SIGTERM);
|
---|
| 598 | sig_unblock(SIGCHLD);
|
---|
| 599 | poll(x, 2 + haslog, 3600*1000);
|
---|
| 600 | sig_block(SIGTERM);
|
---|
| 601 | sig_block(SIGCHLD);
|
---|
| 602 |
|
---|
| 603 | while (read(selfpipe.rd, &ch, 1) == 1)
|
---|
| 604 | continue;
|
---|
| 605 |
|
---|
| 606 | for (;;) {
|
---|
| 607 | pid_t child;
|
---|
| 608 | int wstat;
|
---|
| 609 |
|
---|
| 610 | child = wait_any_nohang(&wstat);
|
---|
| 611 | if (!child)
|
---|
| 612 | break;
|
---|
| 613 | if ((child == -1) && (errno != EINTR))
|
---|
| 614 | break;
|
---|
| 615 | if (child == svd[0].pid) {
|
---|
| 616 | svd[0].wstat = wstat;
|
---|
| 617 | svd[0].pid = 0;
|
---|
| 618 | pidchanged = 1;
|
---|
| 619 | svd[0].ctrl &= ~C_TERM;
|
---|
| 620 | if (svd[0].state != S_FINISH) {
|
---|
| 621 | fd = open("finish", O_RDONLY|O_NDELAY);
|
---|
| 622 | if (fd != -1) {
|
---|
| 623 | close(fd);
|
---|
| 624 | svd[0].state = S_FINISH;
|
---|
| 625 | update_status(&svd[0]);
|
---|
| 626 | continue;
|
---|
| 627 | }
|
---|
| 628 | }
|
---|
| 629 | svd[0].state = S_DOWN;
|
---|
| 630 | deadline = svd[0].start.tv_sec + 1;
|
---|
| 631 | gettimeofday_ns(&svd[0].start);
|
---|
| 632 | update_status(&svd[0]);
|
---|
| 633 | if (LESS(svd[0].start.tv_sec, deadline))
|
---|
| 634 | sleep(1);
|
---|
| 635 | }
|
---|
| 636 | if (haslog) {
|
---|
| 637 | if (child == svd[1].pid) {
|
---|
| 638 | svd[0].wstat = wstat;
|
---|
| 639 | svd[1].pid = 0;
|
---|
| 640 | pidchanged = 1;
|
---|
| 641 | svd[1].state = S_DOWN;
|
---|
| 642 | svd[1].ctrl &= ~C_TERM;
|
---|
| 643 | deadline = svd[1].start.tv_sec + 1;
|
---|
| 644 | gettimeofday_ns(&svd[1].start);
|
---|
| 645 | update_status(&svd[1]);
|
---|
| 646 | if (LESS(svd[1].start.tv_sec, deadline))
|
---|
| 647 | sleep(1);
|
---|
| 648 | }
|
---|
| 649 | }
|
---|
| 650 | } /* for (;;) */
|
---|
| 651 | if (read(svd[0].fdcontrol, &ch, 1) == 1)
|
---|
| 652 | ctrl(&svd[0], ch);
|
---|
| 653 | if (haslog)
|
---|
| 654 | if (read(svd[1].fdcontrol, &ch, 1) == 1)
|
---|
| 655 | ctrl(&svd[1], ch);
|
---|
| 656 |
|
---|
| 657 | if (sigterm) {
|
---|
| 658 | ctrl(&svd[0], 'x');
|
---|
| 659 | sigterm = 0;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | if (svd[0].sd_want == W_EXIT && svd[0].state == S_DOWN) {
|
---|
| 663 | if (svd[1].pid == 0)
|
---|
| 664 | _exit(EXIT_SUCCESS);
|
---|
| 665 | if (svd[1].sd_want != W_EXIT) {
|
---|
| 666 | svd[1].sd_want = W_EXIT;
|
---|
| 667 | /* stopservice(&svd[1]); */
|
---|
| 668 | update_status(&svd[1]);
|
---|
| 669 | close(logpipe.wr);
|
---|
| 670 | close(logpipe.rd);
|
---|
| 671 | }
|
---|
| 672 | }
|
---|
| 673 | } /* for (;;) */
|
---|
| 674 | /* not reached */
|
---|
| 675 | return 0;
|
---|
| 676 | }
|
---|