[1765] | 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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[2725] | 28 | /* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */
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[1765] | 29 |
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[3621] | 30 | //config:config RUNSV
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| 31 | //config: bool "runsv"
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| 32 | //config: default y
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| 33 | //config: help
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| 34 | //config: runsv starts and monitors a service and optionally an appendant log
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| 35 | //config: service.
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| 36 |
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| 37 | //applet:IF_RUNSV(APPLET(runsv, BB_DIR_USR_BIN, BB_SUID_DROP))
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| 38 |
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| 39 | //kbuild:lib-$(CONFIG_RUNSV) += runsv.o
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| 40 |
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[3232] | 41 | //usage:#define runsv_trivial_usage
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| 42 | //usage: "DIR"
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| 43 | //usage:#define runsv_full_usage "\n\n"
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| 44 | //usage: "Start and monitor a service and optionally an appendant log service"
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| 45 |
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[1765] | 46 | #include <sys/file.h>
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| 47 | #include "libbb.h"
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[3621] | 48 | #include "common_bufsiz.h"
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[1765] | 49 | #include "runit_lib.h"
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| 50 |
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| 51 | #if ENABLE_MONOTONIC_SYSCALL
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| 52 | #include <sys/syscall.h>
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| 53 |
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| 54 | /* libc has incredibly messy way of doing this,
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| 55 | * typically requiring -lrt. We just skip all this mess */
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| 56 | static void gettimeofday_ns(struct timespec *ts)
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| 57 | {
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| 58 | syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
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| 59 | }
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| 60 | #else
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| 61 | static void gettimeofday_ns(struct timespec *ts)
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| 62 | {
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[3621] | 63 | BUILD_BUG_ON(sizeof(struct timeval) != sizeof(struct timespec));
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| 64 | BUILD_BUG_ON(sizeof(((struct timeval*)ts)->tv_usec) != sizeof(ts->tv_nsec));
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| 65 | /* Cheat */
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| 66 | gettimeofday((void*)ts, NULL);
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| 67 | ts->tv_nsec *= 1000;
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[1765] | 68 | }
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| 69 | #endif
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| 70 |
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| 71 | /* Compare possibly overflowing unsigned counters */
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| 72 | #define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
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| 73 |
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| 74 | /* state */
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| 75 | #define S_DOWN 0
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| 76 | #define S_RUN 1
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| 77 | #define S_FINISH 2
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| 78 | /* ctrl */
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| 79 | #define C_NOOP 0
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| 80 | #define C_TERM 1
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| 81 | #define C_PAUSE 2
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| 82 | /* want */
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| 83 | #define W_UP 0
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| 84 | #define W_DOWN 1
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| 85 | #define W_EXIT 2
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| 86 |
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| 87 | struct svdir {
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| 88 | int pid;
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| 89 | smallint state;
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| 90 | smallint ctrl;
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[2725] | 91 | smallint sd_want;
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[1765] | 92 | smallint islog;
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| 93 | struct timespec start;
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| 94 | int fdlock;
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| 95 | int fdcontrol;
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| 96 | int fdcontrolwrite;
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[2725] | 97 | int wstat;
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[1765] | 98 | };
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| 99 |
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[2725] | 100 | struct globals {
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| 101 | smallint haslog;
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| 102 | smallint sigterm;
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| 103 | smallint pidchanged;
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| 104 | struct fd_pair selfpipe;
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| 105 | struct fd_pair logpipe;
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| 106 | char *dir;
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| 107 | struct svdir svd[2];
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| 108 | } FIX_ALIASING;
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[3621] | 109 | #define G (*(struct globals*)bb_common_bufsiz1)
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[2725] | 110 | #define haslog (G.haslog )
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| 111 | #define sigterm (G.sigterm )
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| 112 | #define pidchanged (G.pidchanged )
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| 113 | #define selfpipe (G.selfpipe )
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| 114 | #define logpipe (G.logpipe )
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| 115 | #define dir (G.dir )
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| 116 | #define svd (G.svd )
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| 117 | #define INIT_G() do { \
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[3621] | 118 | setup_common_bufsiz(); \
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[2725] | 119 | pidchanged = 1; \
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| 120 | } while (0)
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[1765] | 121 |
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| 122 | static void fatal2_cannot(const char *m1, const char *m2)
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| 123 | {
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[3621] | 124 | bb_perror_msg_and_die("%s: fatal: can't %s%s", dir, m1, m2);
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[1765] | 125 | /* was exiting 111 */
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| 126 | }
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| 127 | static void fatal_cannot(const char *m)
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| 128 | {
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| 129 | fatal2_cannot(m, "");
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| 130 | /* was exiting 111 */
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| 131 | }
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| 132 | static void fatal2x_cannot(const char *m1, const char *m2)
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| 133 | {
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[3621] | 134 | bb_error_msg_and_die("%s: fatal: can't %s%s", dir, m1, m2);
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[1765] | 135 | /* was exiting 111 */
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| 136 | }
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| 137 | static void warn_cannot(const char *m)
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| 138 | {
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| 139 | bb_perror_msg("%s: warning: cannot %s", dir, m);
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| 140 | }
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| 141 |
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[2725] | 142 | static void s_child(int sig_no UNUSED_PARAM)
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[1765] | 143 | {
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[2725] | 144 | write(selfpipe.wr, "", 1);
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[1765] | 145 | }
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| 146 |
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[2725] | 147 | static void s_term(int sig_no UNUSED_PARAM)
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[1765] | 148 | {
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| 149 | sigterm = 1;
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[2725] | 150 | write(selfpipe.wr, "", 1); /* XXX */
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[1765] | 151 | }
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| 152 |
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| 153 | static int open_trunc_or_warn(const char *name)
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| 154 | {
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[2725] | 155 | /* Why O_NDELAY? */
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| 156 | int fd = open(name, O_WRONLY | O_NDELAY | O_TRUNC | O_CREAT, 0644);
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[1765] | 157 | if (fd < 0)
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| 158 | bb_perror_msg("%s: warning: cannot open %s",
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| 159 | dir, name);
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| 160 | return fd;
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| 161 | }
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| 162 |
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| 163 | static void update_status(struct svdir *s)
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| 164 | {
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| 165 | ssize_t sz;
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| 166 | int fd;
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| 167 | svstatus_t status;
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| 168 |
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| 169 | /* pid */
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| 170 | if (pidchanged) {
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| 171 | fd = open_trunc_or_warn("supervise/pid.new");
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| 172 | if (fd < 0)
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| 173 | return;
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| 174 | if (s->pid) {
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| 175 | char spid[sizeof(int)*3 + 2];
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| 176 | int size = sprintf(spid, "%u\n", (unsigned)s->pid);
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| 177 | write(fd, spid, size);
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| 178 | }
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| 179 | close(fd);
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| 180 | if (rename_or_warn("supervise/pid.new",
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[3232] | 181 | s->islog ? "log/supervise/pid" : "log/supervise/pid"+4))
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[1765] | 182 | return;
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| 183 | pidchanged = 0;
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| 184 | }
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| 185 |
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| 186 | /* stat */
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| 187 | fd = open_trunc_or_warn("supervise/stat.new");
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| 188 | if (fd < -1)
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| 189 | return;
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| 190 |
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| 191 | {
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| 192 | char stat_buf[sizeof("finish, paused, got TERM, want down\n")];
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| 193 | char *p = stat_buf;
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| 194 | switch (s->state) {
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| 195 | case S_DOWN:
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[3232] | 196 | p = stpcpy(p, "down");
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[1765] | 197 | break;
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| 198 | case S_RUN:
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[3232] | 199 | p = stpcpy(p, "run");
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[1765] | 200 | break;
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| 201 | case S_FINISH:
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[3232] | 202 | p = stpcpy(p, "finish");
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[1765] | 203 | break;
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| 204 | }
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[2725] | 205 | if (s->ctrl & C_PAUSE)
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[3232] | 206 | p = stpcpy(p, ", paused");
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[2725] | 207 | if (s->ctrl & C_TERM)
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[3232] | 208 | p = stpcpy(p, ", got TERM");
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[1765] | 209 | if (s->state != S_DOWN)
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[2725] | 210 | switch (s->sd_want) {
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[1765] | 211 | case W_DOWN:
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[3232] | 212 | p = stpcpy(p, ", want down");
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[1765] | 213 | break;
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| 214 | case W_EXIT:
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[3232] | 215 | p = stpcpy(p, ", want exit");
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[1765] | 216 | break;
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| 217 | }
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| 218 | *p++ = '\n';
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| 219 | write(fd, stat_buf, p - stat_buf);
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| 220 | close(fd);
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| 221 | }
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| 222 |
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| 223 | rename_or_warn("supervise/stat.new",
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| 224 | s->islog ? "log/supervise/stat" : "log/supervise/stat"+4);
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| 225 |
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| 226 | /* supervise compatibility */
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| 227 | memset(&status, 0, sizeof(status));
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| 228 | status.time_be64 = SWAP_BE64(s->start.tv_sec + 0x400000000000000aULL);
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| 229 | status.time_nsec_be32 = SWAP_BE32(s->start.tv_nsec);
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| 230 | status.pid_le32 = SWAP_LE32(s->pid);
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| 231 | if (s->ctrl & C_PAUSE)
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| 232 | status.paused = 1;
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[2725] | 233 | if (s->sd_want == W_UP)
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[1765] | 234 | status.want = 'u';
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| 235 | else
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| 236 | status.want = 'd';
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| 237 | if (s->ctrl & C_TERM)
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| 238 | status.got_term = 1;
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| 239 | status.run_or_finish = s->state;
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| 240 | fd = open_trunc_or_warn("supervise/status.new");
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| 241 | if (fd < 0)
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| 242 | return;
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| 243 | sz = write(fd, &status, sizeof(status));
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| 244 | close(fd);
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| 245 | if (sz != sizeof(status)) {
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| 246 | warn_cannot("write supervise/status.new");
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| 247 | unlink("supervise/status.new");
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| 248 | return;
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| 249 | }
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| 250 | rename_or_warn("supervise/status.new",
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| 251 | s->islog ? "log/supervise/status" : "log/supervise/status"+4);
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| 252 | }
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| 253 |
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| 254 | static unsigned custom(struct svdir *s, char c)
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| 255 | {
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[2725] | 256 | pid_t pid;
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[1765] | 257 | int w;
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| 258 | char a[10];
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| 259 | struct stat st;
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| 260 |
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[2725] | 261 | if (s->islog)
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| 262 | return 0;
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[1765] | 263 | strcpy(a, "control/?");
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[2725] | 264 | a[8] = c; /* replace '?' */
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[1765] | 265 | if (stat(a, &st) == 0) {
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| 266 | if (st.st_mode & S_IXUSR) {
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[2725] | 267 | pid = vfork();
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[1765] | 268 | if (pid == -1) {
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[2725] | 269 | warn_cannot("vfork for control/?");
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[1765] | 270 | return 0;
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| 271 | }
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[2725] | 272 | if (pid == 0) {
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| 273 | /* child */
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| 274 | if (haslog && dup2(logpipe.wr, 1) == -1)
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[1765] | 275 | warn_cannot("setup stdout for control/?");
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[2725] | 276 | execl(a, a, (char *) NULL);
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[1765] | 277 | fatal_cannot("run control/?");
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| 278 | }
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[2725] | 279 | /* parent */
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| 280 | if (safe_waitpid(pid, &w, 0) == -1) {
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[1765] | 281 | warn_cannot("wait for child control/?");
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| 282 | return 0;
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| 283 | }
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[2725] | 284 | return WEXITSTATUS(w) == 0;
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[1765] | 285 | }
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| 286 | } else {
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| 287 | if (errno != ENOENT)
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| 288 | warn_cannot("stat control/?");
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| 289 | }
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| 290 | return 0;
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| 291 | }
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| 292 |
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| 293 | static void stopservice(struct svdir *s)
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| 294 | {
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| 295 | if (s->pid && !custom(s, 't')) {
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| 296 | kill(s->pid, SIGTERM);
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| 297 | s->ctrl |= C_TERM;
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| 298 | update_status(s);
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| 299 | }
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[2725] | 300 | if (s->sd_want == W_DOWN) {
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[1765] | 301 | kill(s->pid, SIGCONT);
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| 302 | custom(s, 'd');
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| 303 | return;
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| 304 | }
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[2725] | 305 | if (s->sd_want == W_EXIT) {
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[1765] | 306 | kill(s->pid, SIGCONT);
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| 307 | custom(s, 'x');
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| 308 | }
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| 309 | }
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| 310 |
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| 311 | static void startservice(struct svdir *s)
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| 312 | {
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| 313 | int p;
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[2725] | 314 | const char *arg[4];
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| 315 | char exitcode[sizeof(int)*3 + 2];
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[1765] | 316 |
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[2725] | 317 | if (s->state == S_FINISH) {
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| 318 | /* Two arguments are given to ./finish. The first one is ./run exit code,
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| 319 | * or -1 if ./run didnt exit normally. The second one is
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| 320 | * the least significant byte of the exit status as determined by waitpid;
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| 321 | * for instance it is 0 if ./run exited normally, and the signal number
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| 322 | * if ./run was terminated by a signal. If runsv cannot start ./run
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| 323 | * for some reason, the exit code is 111 and the status is 0.
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| 324 | */
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| 325 | arg[0] = "./finish";
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| 326 | arg[1] = "-1";
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| 327 | if (WIFEXITED(s->wstat)) {
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| 328 | *utoa_to_buf(WEXITSTATUS(s->wstat), exitcode, sizeof(exitcode)) = '\0';
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| 329 | arg[1] = exitcode;
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| 330 | }
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| 331 | //arg[2] = "0";
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| 332 | //if (WIFSIGNALED(s->wstat)) {
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| 333 | arg[2] = utoa(WTERMSIG(s->wstat));
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| 334 | //}
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| 335 | arg[3] = NULL;
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| 336 | } else {
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| 337 | arg[0] = "./run";
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| 338 | arg[1] = NULL;
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[1765] | 339 | custom(s, 'u');
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| 340 | }
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| 341 |
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| 342 | if (s->pid != 0)
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| 343 | stopservice(s); /* should never happen */
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[2725] | 344 | while ((p = vfork()) == -1) {
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| 345 | warn_cannot("vfork, sleeping");
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[1765] | 346 | sleep(5);
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| 347 | }
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| 348 | if (p == 0) {
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| 349 | /* child */
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| 350 | if (haslog) {
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[2725] | 351 | /* NB: bug alert! right order is close, then dup2 */
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[1765] | 352 | if (s->islog) {
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| 353 | xchdir("./log");
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[2725] | 354 | close(logpipe.wr);
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| 355 | xdup2(logpipe.rd, 0);
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[1765] | 356 | } else {
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[2725] | 357 | close(logpipe.rd);
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| 358 | xdup2(logpipe.wr, 1);
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[1765] | 359 | }
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| 360 | }
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[2725] | 361 | /* Non-ignored signals revert to SIG_DFL on exec anyway */
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| 362 | /*bb_signals(0
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| 363 | + (1 << SIGCHLD)
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| 364 | + (1 << SIGTERM)
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| 365 | , SIG_DFL);*/
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[1765] | 366 | sig_unblock(SIGCHLD);
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| 367 | sig_unblock(SIGTERM);
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[2725] | 368 | execv(arg[0], (char**) arg);
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| 369 | fatal2_cannot(s->islog ? "start log/" : "start ", arg[0]);
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[1765] | 370 | }
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[2725] | 371 | /* parent */
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[1765] | 372 | if (s->state != S_FINISH) {
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| 373 | gettimeofday_ns(&s->start);
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| 374 | s->state = S_RUN;
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| 375 | }
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| 376 | s->pid = p;
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| 377 | pidchanged = 1;
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| 378 | s->ctrl = C_NOOP;
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| 379 | update_status(s);
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| 380 | }
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| 381 |
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| 382 | static int ctrl(struct svdir *s, char c)
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| 383 | {
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| 384 | int sig;
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| 385 |
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| 386 | switch (c) {
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| 387 | case 'd': /* down */
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[2725] | 388 | s->sd_want = W_DOWN;
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[1765] | 389 | update_status(s);
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| 390 | if (s->pid && s->state != S_FINISH)
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| 391 | stopservice(s);
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| 392 | break;
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| 393 | case 'u': /* up */
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[2725] | 394 | s->sd_want = W_UP;
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[1765] | 395 | update_status(s);
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| 396 | if (s->pid == 0)
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| 397 | startservice(s);
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| 398 | break;
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| 399 | case 'x': /* exit */
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| 400 | if (s->islog)
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| 401 | break;
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[2725] | 402 | s->sd_want = W_EXIT;
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[1765] | 403 | update_status(s);
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| 404 | /* FALLTHROUGH */
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| 405 | case 't': /* sig term */
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| 406 | if (s->pid && s->state != S_FINISH)
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| 407 | stopservice(s);
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| 408 | break;
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| 409 | case 'k': /* sig kill */
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| 410 | if (s->pid && !custom(s, c))
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| 411 | kill(s->pid, SIGKILL);
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| 412 | s->state = S_DOWN;
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| 413 | break;
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| 414 | case 'p': /* sig pause */
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| 415 | if (s->pid && !custom(s, c))
|
---|
| 416 | kill(s->pid, SIGSTOP);
|
---|
| 417 | s->ctrl |= C_PAUSE;
|
---|
| 418 | update_status(s);
|
---|
| 419 | break;
|
---|
| 420 | case 'c': /* sig cont */
|
---|
| 421 | if (s->pid && !custom(s, c))
|
---|
| 422 | kill(s->pid, SIGCONT);
|
---|
[2725] | 423 | s->ctrl &= ~C_PAUSE;
|
---|
[1765] | 424 | update_status(s);
|
---|
| 425 | break;
|
---|
| 426 | case 'o': /* once */
|
---|
[2725] | 427 | s->sd_want = W_DOWN;
|
---|
[1765] | 428 | update_status(s);
|
---|
| 429 | if (!s->pid)
|
---|
| 430 | startservice(s);
|
---|
| 431 | break;
|
---|
| 432 | case 'a': /* sig alarm */
|
---|
| 433 | sig = SIGALRM;
|
---|
| 434 | goto sendsig;
|
---|
| 435 | case 'h': /* sig hup */
|
---|
| 436 | sig = SIGHUP;
|
---|
| 437 | goto sendsig;
|
---|
| 438 | case 'i': /* sig int */
|
---|
| 439 | sig = SIGINT;
|
---|
| 440 | goto sendsig;
|
---|
| 441 | case 'q': /* sig quit */
|
---|
| 442 | sig = SIGQUIT;
|
---|
| 443 | goto sendsig;
|
---|
| 444 | case '1': /* sig usr1 */
|
---|
| 445 | sig = SIGUSR1;
|
---|
| 446 | goto sendsig;
|
---|
| 447 | case '2': /* sig usr2 */
|
---|
| 448 | sig = SIGUSR2;
|
---|
| 449 | goto sendsig;
|
---|
| 450 | }
|
---|
| 451 | return 1;
|
---|
| 452 | sendsig:
|
---|
| 453 | if (s->pid && !custom(s, c))
|
---|
| 454 | kill(s->pid, sig);
|
---|
| 455 | return 1;
|
---|
| 456 | }
|
---|
| 457 |
|
---|
[2725] | 458 | int runsv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 459 | int runsv_main(int argc UNUSED_PARAM, char **argv)
|
---|
[1765] | 460 | {
|
---|
| 461 | struct stat s;
|
---|
| 462 | int fd;
|
---|
| 463 | int r;
|
---|
| 464 | char buf[256];
|
---|
| 465 |
|
---|
[2725] | 466 | INIT_G();
|
---|
[1765] | 467 |
|
---|
[2725] | 468 | dir = single_argv(argv);
|
---|
[1765] | 469 |
|
---|
[2725] | 470 | xpiped_pair(selfpipe);
|
---|
| 471 | close_on_exec_on(selfpipe.rd);
|
---|
| 472 | close_on_exec_on(selfpipe.wr);
|
---|
| 473 | ndelay_on(selfpipe.rd);
|
---|
| 474 | ndelay_on(selfpipe.wr);
|
---|
| 475 |
|
---|
[1765] | 476 | sig_block(SIGCHLD);
|
---|
[2725] | 477 | bb_signals_recursive_norestart(1 << SIGCHLD, s_child);
|
---|
[1765] | 478 | sig_block(SIGTERM);
|
---|
[2725] | 479 | bb_signals_recursive_norestart(1 << SIGTERM, s_term);
|
---|
[1765] | 480 |
|
---|
| 481 | xchdir(dir);
|
---|
| 482 | /* bss: svd[0].pid = 0; */
|
---|
| 483 | if (S_DOWN) svd[0].state = S_DOWN; /* otherwise already 0 (bss) */
|
---|
| 484 | if (C_NOOP) svd[0].ctrl = C_NOOP;
|
---|
[2725] | 485 | if (W_UP) svd[0].sd_want = W_UP;
|
---|
[1765] | 486 | /* bss: svd[0].islog = 0; */
|
---|
| 487 | /* bss: svd[1].pid = 0; */
|
---|
| 488 | gettimeofday_ns(&svd[0].start);
|
---|
[2725] | 489 | if (stat("down", &s) != -1)
|
---|
| 490 | svd[0].sd_want = W_DOWN;
|
---|
[1765] | 491 |
|
---|
| 492 | if (stat("log", &s) == -1) {
|
---|
| 493 | if (errno != ENOENT)
|
---|
| 494 | warn_cannot("stat ./log");
|
---|
| 495 | } else {
|
---|
| 496 | if (!S_ISDIR(s.st_mode)) {
|
---|
| 497 | errno = 0;
|
---|
| 498 | warn_cannot("stat log/down: log is not a directory");
|
---|
| 499 | } else {
|
---|
| 500 | haslog = 1;
|
---|
| 501 | svd[1].state = S_DOWN;
|
---|
| 502 | svd[1].ctrl = C_NOOP;
|
---|
[2725] | 503 | svd[1].sd_want = W_UP;
|
---|
[1765] | 504 | svd[1].islog = 1;
|
---|
| 505 | gettimeofday_ns(&svd[1].start);
|
---|
| 506 | if (stat("log/down", &s) != -1)
|
---|
[2725] | 507 | svd[1].sd_want = W_DOWN;
|
---|
| 508 | xpiped_pair(logpipe);
|
---|
| 509 | close_on_exec_on(logpipe.rd);
|
---|
| 510 | close_on_exec_on(logpipe.wr);
|
---|
[1765] | 511 | }
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | if (mkdir("supervise", 0700) == -1) {
|
---|
| 515 | r = readlink("supervise", buf, sizeof(buf));
|
---|
| 516 | if (r != -1) {
|
---|
| 517 | if (r == sizeof(buf))
|
---|
| 518 | fatal2x_cannot("readlink ./supervise", ": name too long");
|
---|
| 519 | buf[r] = 0;
|
---|
| 520 | mkdir(buf, 0700);
|
---|
| 521 | } else {
|
---|
| 522 | if ((errno != ENOENT) && (errno != EINVAL))
|
---|
| 523 | fatal_cannot("readlink ./supervise");
|
---|
| 524 | }
|
---|
| 525 | }
|
---|
| 526 | svd[0].fdlock = xopen3("log/supervise/lock"+4,
|
---|
| 527 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
|
---|
[2725] | 528 | if (flock(svd[0].fdlock, LOCK_EX | LOCK_NB) == -1)
|
---|
[1765] | 529 | fatal_cannot("lock supervise/lock");
|
---|
[2725] | 530 | close_on_exec_on(svd[0].fdlock);
|
---|
[1765] | 531 | if (haslog) {
|
---|
| 532 | if (mkdir("log/supervise", 0700) == -1) {
|
---|
| 533 | r = readlink("log/supervise", buf, 256);
|
---|
| 534 | if (r != -1) {
|
---|
| 535 | if (r == 256)
|
---|
| 536 | fatal2x_cannot("readlink ./log/supervise", ": name too long");
|
---|
| 537 | buf[r] = 0;
|
---|
| 538 | fd = xopen(".", O_RDONLY|O_NDELAY);
|
---|
| 539 | xchdir("./log");
|
---|
| 540 | mkdir(buf, 0700);
|
---|
| 541 | if (fchdir(fd) == -1)
|
---|
| 542 | fatal_cannot("change back to service directory");
|
---|
| 543 | close(fd);
|
---|
| 544 | }
|
---|
| 545 | else {
|
---|
| 546 | if ((errno != ENOENT) && (errno != EINVAL))
|
---|
| 547 | fatal_cannot("readlink ./log/supervise");
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 | svd[1].fdlock = xopen3("log/supervise/lock",
|
---|
| 551 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600);
|
---|
[2725] | 552 | if (flock(svd[1].fdlock, LOCK_EX) == -1)
|
---|
[1765] | 553 | fatal_cannot("lock log/supervise/lock");
|
---|
[2725] | 554 | close_on_exec_on(svd[1].fdlock);
|
---|
[1765] | 555 | }
|
---|
| 556 |
|
---|
| 557 | mkfifo("log/supervise/control"+4, 0600);
|
---|
| 558 | svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY);
|
---|
[2725] | 559 | close_on_exec_on(svd[0].fdcontrol);
|
---|
[1765] | 560 | svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY);
|
---|
[2725] | 561 | close_on_exec_on(svd[0].fdcontrolwrite);
|
---|
[1765] | 562 | update_status(&svd[0]);
|
---|
| 563 | if (haslog) {
|
---|
| 564 | mkfifo("log/supervise/control", 0600);
|
---|
| 565 | svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY);
|
---|
[2725] | 566 | close_on_exec_on(svd[1].fdcontrol);
|
---|
[1765] | 567 | svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY);
|
---|
[2725] | 568 | close_on_exec_on(svd[1].fdcontrolwrite);
|
---|
[1765] | 569 | update_status(&svd[1]);
|
---|
| 570 | }
|
---|
| 571 | mkfifo("log/supervise/ok"+4, 0600);
|
---|
| 572 | fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY);
|
---|
[2725] | 573 | close_on_exec_on(fd);
|
---|
[1765] | 574 | if (haslog) {
|
---|
| 575 | mkfifo("log/supervise/ok", 0600);
|
---|
| 576 | fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY);
|
---|
[2725] | 577 | close_on_exec_on(fd);
|
---|
[1765] | 578 | }
|
---|
| 579 | for (;;) {
|
---|
| 580 | struct pollfd x[3];
|
---|
| 581 | unsigned deadline;
|
---|
| 582 | char ch;
|
---|
| 583 |
|
---|
| 584 | if (haslog)
|
---|
[2725] | 585 | if (!svd[1].pid && svd[1].sd_want == W_UP)
|
---|
[1765] | 586 | startservice(&svd[1]);
|
---|
| 587 | if (!svd[0].pid)
|
---|
[2725] | 588 | if (svd[0].sd_want == W_UP || svd[0].state == S_FINISH)
|
---|
[1765] | 589 | startservice(&svd[0]);
|
---|
| 590 |
|
---|
[2725] | 591 | x[0].fd = selfpipe.rd;
|
---|
[1765] | 592 | x[0].events = POLLIN;
|
---|
| 593 | x[1].fd = svd[0].fdcontrol;
|
---|
| 594 | x[1].events = POLLIN;
|
---|
| 595 | /* x[2] is used only if haslog == 1 */
|
---|
| 596 | x[2].fd = svd[1].fdcontrol;
|
---|
| 597 | x[2].events = POLLIN;
|
---|
| 598 | sig_unblock(SIGTERM);
|
---|
| 599 | sig_unblock(SIGCHLD);
|
---|
| 600 | poll(x, 2 + haslog, 3600*1000);
|
---|
| 601 | sig_block(SIGTERM);
|
---|
| 602 | sig_block(SIGCHLD);
|
---|
| 603 |
|
---|
[2725] | 604 | while (read(selfpipe.rd, &ch, 1) == 1)
|
---|
[1765] | 605 | continue;
|
---|
| 606 |
|
---|
| 607 | for (;;) {
|
---|
[2725] | 608 | pid_t child;
|
---|
[1765] | 609 | int wstat;
|
---|
| 610 |
|
---|
[2725] | 611 | child = wait_any_nohang(&wstat);
|
---|
[1765] | 612 | if (!child)
|
---|
| 613 | break;
|
---|
| 614 | if ((child == -1) && (errno != EINTR))
|
---|
| 615 | break;
|
---|
| 616 | if (child == svd[0].pid) {
|
---|
[2725] | 617 | svd[0].wstat = wstat;
|
---|
[1765] | 618 | svd[0].pid = 0;
|
---|
| 619 | pidchanged = 1;
|
---|
[2725] | 620 | svd[0].ctrl &= ~C_TERM;
|
---|
[1765] | 621 | if (svd[0].state != S_FINISH) {
|
---|
[2725] | 622 | fd = open("finish", O_RDONLY|O_NDELAY);
|
---|
[1765] | 623 | if (fd != -1) {
|
---|
| 624 | close(fd);
|
---|
| 625 | svd[0].state = S_FINISH;
|
---|
| 626 | update_status(&svd[0]);
|
---|
| 627 | continue;
|
---|
| 628 | }
|
---|
| 629 | }
|
---|
| 630 | svd[0].state = S_DOWN;
|
---|
| 631 | deadline = svd[0].start.tv_sec + 1;
|
---|
| 632 | gettimeofday_ns(&svd[0].start);
|
---|
| 633 | update_status(&svd[0]);
|
---|
| 634 | if (LESS(svd[0].start.tv_sec, deadline))
|
---|
| 635 | sleep(1);
|
---|
| 636 | }
|
---|
| 637 | if (haslog) {
|
---|
| 638 | if (child == svd[1].pid) {
|
---|
[2725] | 639 | svd[0].wstat = wstat;
|
---|
[1765] | 640 | svd[1].pid = 0;
|
---|
| 641 | pidchanged = 1;
|
---|
| 642 | svd[1].state = S_DOWN;
|
---|
| 643 | svd[1].ctrl &= ~C_TERM;
|
---|
| 644 | deadline = svd[1].start.tv_sec + 1;
|
---|
| 645 | gettimeofday_ns(&svd[1].start);
|
---|
| 646 | update_status(&svd[1]);
|
---|
| 647 | if (LESS(svd[1].start.tv_sec, deadline))
|
---|
| 648 | sleep(1);
|
---|
| 649 | }
|
---|
| 650 | }
|
---|
[2725] | 651 | } /* for (;;) */
|
---|
[1765] | 652 | if (read(svd[0].fdcontrol, &ch, 1) == 1)
|
---|
| 653 | ctrl(&svd[0], ch);
|
---|
| 654 | if (haslog)
|
---|
| 655 | if (read(svd[1].fdcontrol, &ch, 1) == 1)
|
---|
| 656 | ctrl(&svd[1], ch);
|
---|
| 657 |
|
---|
| 658 | if (sigterm) {
|
---|
| 659 | ctrl(&svd[0], 'x');
|
---|
| 660 | sigterm = 0;
|
---|
| 661 | }
|
---|
| 662 |
|
---|
[2725] | 663 | if (svd[0].sd_want == W_EXIT && svd[0].state == S_DOWN) {
|
---|
[1765] | 664 | if (svd[1].pid == 0)
|
---|
[2725] | 665 | _exit(EXIT_SUCCESS);
|
---|
| 666 | if (svd[1].sd_want != W_EXIT) {
|
---|
| 667 | svd[1].sd_want = W_EXIT;
|
---|
[1765] | 668 | /* stopservice(&svd[1]); */
|
---|
| 669 | update_status(&svd[1]);
|
---|
[2725] | 670 | close(logpipe.wr);
|
---|
| 671 | close(logpipe.rd);
|
---|
[1765] | 672 | }
|
---|
| 673 | }
|
---|
[2725] | 674 | } /* for (;;) */
|
---|
[1765] | 675 | /* not reached */
|
---|
| 676 | return 0;
|
---|
| 677 | }
|
---|