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Commit | Line | Data |
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4297fecb | 1 | /* |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
0a5ff702 | 6 | * Copyright (C) 1987, 1988 by the Massachusetts Institute of Technology |
7 | * For copying and distribution information, please see the file | |
8 | * <mit-copyright.h>. | |
4297fecb | 9 | * |
10 | * This program starts the DCM in a "clean" environment. | |
11 | * and then waits for it to exit. | |
12 | */ | |
13 | ||
14 | #ifndef lint | |
2ce085d2 | 15 | static char *rcsid_mr_starter_c = "$Header$"; |
4297fecb | 16 | #endif lint |
17 | ||
0a5ff702 | 18 | #include <mit-copyright.h> |
b91fbc27 | 19 | #include <errno.h> |
4297fecb | 20 | #include <stdio.h> |
b91fbc27 | 21 | #include <string.h> |
4297fecb | 22 | #include <sys/types.h> |
23 | #include <sys/file.h> | |
24 | #include <sys/wait.h> | |
25 | #include <sys/signal.h> | |
26 | #include <sys/ioctl.h> | |
15fa49b5 | 27 | #include <fcntl.h> |
28 | #include <sys/resource.h> | |
2ce085d2 | 29 | #include <moira_site.h> |
b91fbc27 | 30 | #include <time.h> |
4297fecb | 31 | |
e6eb3546 | 32 | #define PROG "dcm" |
4297fecb | 33 | |
34 | int rdpipe[2]; | |
15fa49b5 | 35 | extern int errno; |
4297fecb | 36 | |
5eaef520 | 37 | void cleanup(void) |
4297fecb | 38 | { |
5eaef520 | 39 | int stat, serrno = errno; |
40 | char buf[BUFSIZ]; | |
41 | ||
42 | buf[0] = '\0'; | |
43 | ||
44 | while (waitpid(-1, &stat, WNOHANG) > 0) | |
45 | { | |
46 | if (WIFEXITED(stat)) | |
47 | { | |
48 | if (WEXITSTATUS(stat)) | |
49 | sprintf(buf, "exited with code %d\n", WEXITSTATUS(stat)); | |
50 | } | |
51 | if (WIFSIGNALED(stat)) | |
52 | { | |
53 | sprintf(buf, "exited on signal %d%s\n", WTERMSIG(stat), | |
54 | (WCOREDUMP(stat) ? "; Core dumped" : "")); | |
4297fecb | 55 | } |
5eaef520 | 56 | write(rdpipe[1], buf, strlen(buf)); |
57 | close(rdpipe[1]); | |
58 | } | |
59 | errno = serrno; | |
4297fecb | 60 | } |
61 | ||
5eaef520 | 62 | int main(int argc, char *argv) |
4297fecb | 63 | { |
5eaef520 | 64 | char buf[BUFSIZ]; |
65 | FILE *log, *prog; | |
66 | int logf, inf, i, done, pid, tty; | |
67 | struct rlimit rl; | |
68 | ||
69 | extern int errno; | |
70 | extern char *sys_errlist[]; | |
4297fecb | 71 | |
5eaef520 | 72 | struct sigaction action; |
73 | int nfds; | |
74 | ||
75 | getrlimit(RLIMIT_NOFILE, &rl); | |
76 | nfds = rl.rlim_cur; | |
77 | ||
78 | action.sa_handler = cleanup; | |
79 | action.sa_flags = 0; | |
80 | sigemptyset(&action.sa_mask); | |
81 | sigaction(SIGCHLD, &action, NULL); | |
82 | ||
59ec8dae | 83 | sprintf(buf, "%s/%s.log", MOIRA_DIR, PROG); |
5eaef520 | 84 | logf = open(buf, O_CREAT | O_WRONLY | O_APPEND, 0640); |
85 | if (logf < 0) | |
86 | { | |
87 | perror(buf); | |
88 | exit(1); | |
89 | } | |
90 | inf = open("/dev/null", O_RDONLY , 0); | |
91 | if (inf < 0) | |
92 | { | |
93 | perror("/dev/null"); | |
94 | exit(1); | |
95 | } | |
96 | pipe(rdpipe); | |
97 | if (fork()) | |
98 | exit(0); | |
99 | chdir("/"); | |
100 | close(0); | |
101 | close(1); | |
102 | close(2); | |
103 | dup2(inf, 0); | |
104 | dup2(inf, 1); | |
105 | dup2(inf, 2); | |
106 | ||
107 | setpgrp(); | |
108 | sprintf(buf, "%s/%s", BIN_DIR, PROG); | |
109 | ||
110 | if ((pid = fork()) == 0) | |
111 | { | |
112 | dup2(inf, 0); | |
113 | dup2(rdpipe[1], 1); | |
114 | dup2(1, 2); | |
115 | for (i = 3; i < nfds; i++) | |
116 | close(i); | |
117 | execl(buf, PROG, 0); | |
118 | perror("cannot run dcm"); | |
119 | exit(1); | |
120 | } | |
121 | if (pid < 0) | |
122 | { | |
123 | perror("startdcm"); | |
124 | exit(1); | |
125 | } | |
126 | ||
127 | log = fdopen(logf, "w"); | |
128 | prog = fdopen(rdpipe[0], "r"); | |
129 | ||
130 | do | |
131 | { | |
132 | char *time_s; | |
133 | long foo; | |
134 | ||
135 | done = 0; | |
136 | errno = 0; | |
137 | if (!fgets(buf, BUFSIZ, prog)) | |
138 | { | |
139 | if (errno && errno != EINTR) | |
140 | { | |
141 | strcpy(buf, "Unable to read from program: "); | |
142 | strcat(buf, sys_errlist[errno]); | |
143 | strcat(buf, "\n"); | |
144 | } | |
145 | else | |
146 | break; | |
147 | } | |
148 | time(&foo); | |
149 | time_s = ctime(&foo) + 4; | |
150 | time_s[strlen(time_s) - 6] = '\0'; | |
151 | fprintf(log, "%s <%d> %s", time_s, pid, buf); | |
152 | fflush(log); | |
153 | } | |
154 | while (!done); | |
155 | exit(0); | |
4297fecb | 156 | } |