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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> |
4297fecb | 19 | #include <stdio.h> |
20 | #include <strings.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/file.h> | |
23 | #include <sys/wait.h> | |
24 | #include <sys/signal.h> | |
25 | #include <sys/ioctl.h> | |
2ce085d2 | 26 | #include <moira_site.h> |
4297fecb | 27 | |
e6eb3546 | 28 | #define PROG "dcm" |
4297fecb | 29 | |
30 | int rdpipe[2]; | |
31 | char *sigdescr[] = { | |
32 | 0, | |
33 | "hangup", | |
34 | "interrupt", | |
35 | "quit", | |
36 | "illegal instruction", | |
37 | "trace/BPT trap", | |
38 | "IOT trap", | |
39 | "EMT trap", | |
40 | "floating exception", | |
41 | "kill", | |
42 | "bus error", | |
43 | "segmentation violation", | |
44 | "bad system call", | |
45 | "broken pipe", | |
46 | "alarm clock", | |
47 | "termination", | |
48 | "urgent I/O condition", | |
49 | "stopped", | |
50 | "stopped", | |
51 | "continued", | |
52 | "child exited", | |
53 | "stopped (tty input)", | |
54 | "stopped (tty output)", | |
55 | "I/O possible", | |
56 | "cputime limit exceeded", | |
57 | "filesize limit exceeded", | |
58 | "virtual timer expired", | |
59 | "profiling timer expired", | |
60 | "window size changed", | |
61 | "signal 29", | |
62 | "user defined signal 1", | |
63 | "user defined signal 2", | |
64 | "signal 32" | |
65 | }; | |
66 | ||
67 | cleanup() | |
68 | { | |
69 | union wait stat; | |
70 | char buf[BUFSIZ]; | |
71 | extern int errno; | |
72 | int serrno = errno; | |
73 | ||
74 | buf[0]='\0'; | |
75 | ||
76 | while (wait3(&stat, WNOHANG, 0) > 0) { | |
77 | if (WIFEXITED(stat)) { | |
78 | if (stat.w_retcode) | |
79 | sprintf(buf, | |
80 | "exited with code %d\n", | |
81 | stat.w_retcode); | |
82 | } | |
83 | if (WIFSIGNALED(stat)) { | |
84 | sprintf(buf, "exited on %s signal%s\n", | |
85 | sigdescr[stat.w_termsig], | |
86 | (stat.w_coredump?"; Core dumped":0)); | |
87 | } | |
88 | write(rdpipe[1], buf, strlen(buf)); | |
89 | close(rdpipe[1]); | |
90 | } | |
91 | errno = serrno; | |
92 | } | |
93 | ||
94 | main(argc, argv) | |
95 | { | |
96 | char buf[BUFSIZ]; | |
97 | FILE *log, *prog; | |
98 | int logf, inf, i, done, pid, tty; | |
99 | ||
100 | extern int errno; | |
101 | extern char *sys_errlist[]; | |
102 | ||
103 | int nfds = getdtablesize(); | |
104 | ||
105 | setreuid(0); | |
106 | signal(SIGCHLD, cleanup); | |
107 | ||
e6eb3546 | 108 | sprintf(buf, "%s/%s.log", SMS_DIR, PROG); |
109 | logf = open(buf, O_CREAT|O_WRONLY|O_APPEND, 0640); | |
4297fecb | 110 | if (logf<0) { |
e6eb3546 | 111 | perror(buf); |
4297fecb | 112 | exit(1); |
113 | } | |
114 | inf = open("/dev/null", O_RDONLY , 0); | |
115 | if (inf < 0) { | |
116 | perror("/dev/null"); | |
117 | exit(1); | |
118 | } | |
119 | pipe(rdpipe); | |
120 | if (fork()) { | |
121 | exit(); | |
122 | } | |
123 | chdir("/"); | |
124 | close(0); | |
125 | close(1); | |
126 | close(2); | |
127 | dup2(inf, 0); | |
128 | dup2(inf, 1); | |
129 | dup2(inf, 2); | |
130 | ||
131 | tty = open("/dev/tty"); | |
132 | ioctl(tty, TIOCNOTTY, 0); | |
133 | close(tty); | |
e6eb3546 | 134 | sprintf(buf, "%s/%s", BIN_DIR, PROG); |
4297fecb | 135 | |
136 | if ((pid = fork()) == 0) { | |
137 | ||
138 | dup2(inf, 0); | |
139 | dup2(rdpipe[1], 1); | |
140 | dup2(1,2); | |
141 | for (i = 3; i <nfds; i++) close(i); | |
e6eb3546 | 142 | execl(buf, PROG, 0); |
4297fecb | 143 | perror("cannot run dcm"); |
144 | exit(1); | |
145 | } | |
146 | if (pid<0) { | |
147 | perror("startdcm"); | |
148 | exit(1); | |
149 | } | |
150 | ||
151 | log = fdopen(logf, "w"); | |
152 | prog = fdopen(rdpipe[0], "r"); | |
153 | ||
154 | ||
155 | do { | |
156 | char *time_s; | |
157 | extern char *ctime(); | |
158 | long foo; | |
159 | ||
160 | done = 0; | |
161 | errno = 0; | |
162 | if (fgets(buf, BUFSIZ, prog) == NULL) { | |
163 | if (errno) { | |
164 | strcpy(buf, "Unable to read from program: "); | |
165 | strcat(buf, sys_errlist[errno]); | |
166 | strcat(buf, "\n"); | |
167 | } else break; | |
168 | } | |
169 | time(&foo); | |
170 | time_s = ctime(&foo)+4; | |
171 | time_s[strlen(time_s)-6]='\0'; | |
172 | fprintf(log, "%s <%d> %s", time_s, pid, buf); | |
173 | fflush(log); | |
174 | } while (!done); | |
175 | exit(0); | |
176 | } | |
177 | ||
178 | ||
179 | ||
180 |