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 */
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441 | sig = SIGQUIT;
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442 | goto sendsig;
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443 | case '1': /* sig usr1 */
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444 | sig = SIGUSR1;
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445 | goto sendsig;
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446 | case '2': /* sig usr2 */
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447 | sig = SIGUSR2;
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448 | goto sendsig;
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449 | }
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450 | return 1;
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451 | sendsig:
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452 | if (s->pid && !custom(s, c))
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453 | kill(s->pid, sig);
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454 | return 1;
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455 | }
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456 |
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457 | int runsv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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458 | int runsv_main(int argc UNUSED_PARAM, char **argv)
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459 | {
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460 | struct stat s;
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461 | int fd;
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462 | int r;
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463 | char buf[256];
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464 |
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465 | INIT_G();
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466 |
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467 | dir = single_argv(argv);
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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 | }
|
---|