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1 | /* | |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
7 | * | |
8 | * This program starts the user registration server | |
9 | * in a "clean" environment, and then waits for it to exit. | |
10 | */ | |
11 | ||
12 | #ifndef lint | |
13 | static char *rcsid_sms_starter_c = "$Header$"; | |
14 | #endif lint | |
15 | ||
16 | #include <stdio.h> | |
17 | #include <strings.h> | |
18 | #include <sys/types.h> | |
19 | #include <sys/file.h> | |
20 | #include <sys/wait.h> | |
21 | #include <sys/signal.h> | |
22 | #include <sys/ioctl.h> | |
23 | ||
24 | #define SMS_LOG_FILE "/u1/sms/reg_svr.log" | |
25 | ||
26 | #define SMS_PROG "/u1/sms/bin/reg_svr" | |
27 | ||
28 | int rdpipe[2]; | |
29 | char *sigdescr[] = { | |
30 | 0, | |
31 | "hangup", | |
32 | "interrupt", | |
33 | "quit", | |
34 | "illegal instruction", | |
35 | "trace/BPT trap", | |
36 | "IOT trap", | |
37 | "EMT trap", | |
38 | "floating exception", | |
39 | "kill", | |
40 | "bus error", | |
41 | "segmentation violation", | |
42 | "bad system call", | |
43 | "broken pipe", | |
44 | "alarm clock", | |
45 | "termination", | |
46 | "urgent I/O condition", | |
47 | "stopped", | |
48 | "stopped", | |
49 | "continued", | |
50 | "child exited", | |
51 | "stopped (tty input)", | |
52 | "stopped (tty output)", | |
53 | "I/O possible", | |
54 | "cputime limit exceeded", | |
55 | "filesize limit exceeded", | |
56 | "virtual timer expired", | |
57 | "profiling timer expired", | |
58 | "window size changed", | |
59 | "signal 29", | |
60 | "user defined signal 1", | |
61 | "user defined signal 2", | |
62 | "signal 32" | |
63 | }; | |
64 | ||
65 | cleanup() | |
66 | { | |
67 | union wait stat; | |
68 | char buf[BUFSIZ]; | |
69 | extern int errno; | |
70 | int serrno = errno; | |
71 | ||
72 | buf[0]='\0'; | |
73 | ||
74 | while (wait3(&stat, WNOHANG, 0) > 0) { | |
75 | if (WIFEXITED(stat)) { | |
76 | if (stat.w_retcode) | |
77 | sprintf(buf, | |
78 | "exited with code %d\n", | |
79 | stat.w_retcode); | |
80 | } | |
81 | if (WIFSIGNALED(stat)) { | |
82 | sprintf(buf, "exited on %s signal%s\n", | |
83 | sigdescr[stat.w_termsig], | |
84 | (stat.w_coredump?"; Core dumped":0)); | |
85 | } | |
86 | write(rdpipe[1], buf, strlen(buf)); | |
87 | close(rdpipe[1]); | |
88 | } | |
89 | errno = serrno; | |
90 | } | |
91 | ||
92 | main(argc, argv) | |
93 | { | |
94 | char buf[BUFSIZ]; | |
95 | FILE *log, *prog; | |
96 | int logf, inf, i, done, pid, tty; | |
97 | ||
98 | extern int errno; | |
99 | extern char *sys_errlist[]; | |
100 | ||
101 | int nfds = getdtablesize(); | |
102 | ||
103 | setreuid(0); | |
104 | signal(SIGCHLD, cleanup); | |
105 | ||
106 | logf = open(SMS_LOG_FILE, O_CREAT|O_WRONLY|O_APPEND, 0640); | |
107 | if (logf<0) { | |
108 | perror(SMS_LOG_FILE); | |
109 | exit(1); | |
110 | } | |
111 | inf = open("/dev/null", O_RDONLY , 0); | |
112 | if (inf < 0) { | |
113 | perror("/dev/null"); | |
114 | exit(1); | |
115 | } | |
116 | pipe(rdpipe); | |
117 | if (fork()) { | |
118 | exit(); | |
119 | } | |
120 | chdir("/"); | |
121 | close(0); | |
122 | close(1); | |
123 | close(2); | |
124 | dup2(inf, 0); | |
125 | dup2(inf, 1); | |
126 | dup2(inf, 2); | |
127 | ||
128 | tty = open("/dev/tty"); | |
129 | ioctl(tty, TIOCNOTTY, 0); | |
130 | close(tty); | |
131 | ||
132 | if ((pid = fork()) == 0) { | |
133 | ||
134 | dup2(inf, 0); | |
135 | dup2(rdpipe[1], 1); | |
136 | dup2(1,2); | |
137 | for (i = 3; i <nfds; i++) close(i); | |
138 | execl(SMS_PROG, "reg_svr", 0); | |
139 | perror("cannot run reg_svr"); | |
140 | exit(1); | |
141 | } | |
142 | if (pid<0) { | |
143 | perror("startreg"); | |
144 | exit(1); | |
145 | } | |
146 | ||
147 | log = fdopen(logf, "w"); | |
148 | prog = fdopen(rdpipe[0], "r"); | |
149 | ||
150 | ||
151 | do { | |
152 | char *time_s; | |
153 | extern char *ctime(); | |
154 | long foo; | |
155 | ||
156 | done = 0; | |
157 | errno = 0; | |
158 | if (fgets(buf, BUFSIZ, prog) == NULL) { | |
159 | if (errno) { | |
160 | strcpy(buf, "Unable to read from program: "); | |
161 | strcat(buf, sys_errlist[errno]); | |
162 | strcat(buf, "\n"); | |
163 | } else break; | |
164 | } | |
165 | time(&foo); | |
166 | time_s = ctime(&foo)+4; | |
167 | time_s[strlen(time_s)-6]='\0'; | |
168 | fprintf(log, "%s <%d> %s", time_s, pid, buf); | |
169 | fflush(log); | |
170 | } while (!done); | |
171 | exit(0); | |
172 | } | |
173 | ||
174 | ||
175 | ||
176 |