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3c46fcae | 1 | /* |
2 | * $Source$ | |
3 | * $Author$ | |
4 | * $Header$ | |
5 | * | |
6 | * Copyright (C) 1987 by the Massachusetts Institute of Technology | |
c801de4c | 7 | * For copying and distribution information, please see the file |
8 | * <mit-copyright.h>. | |
3c46fcae | 9 | * |
10 | * This program starts the sms server in a "clean" environment. | |
11 | * and then waits for it to exit. | |
12 | * | |
3c46fcae | 13 | */ |
14 | ||
15 | #ifndef lint | |
16 | static char *rcsid_sms_starter_c = "$Header$"; | |
17 | #endif lint | |
18 | ||
c801de4c | 19 | #include <mit-copyright.h> |
3c46fcae | 20 | #include <stdio.h> |
95f3bdce | 21 | #include <strings.h> |
3c46fcae | 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> | |
27 | ||
28 | #define SMS_LOG_FILE "/u1/sms/sms.log" | |
29 | ||
7c40fb8c | 30 | #define SMS_PROG "/u1/sms/bin/smsd" |
3c46fcae | 31 | |
32 | int rdpipe[2]; | |
33 | char *sigdescr[] = { | |
34 | 0, | |
35 | "hangup", | |
36 | "interrupt", | |
37 | "quit", | |
38 | "illegal instruction", | |
39 | "trace/BPT trap", | |
40 | "IOT trap", | |
41 | "EMT trap", | |
42 | "floating exception", | |
43 | "kill", | |
44 | "bus error", | |
45 | "segmentation violation", | |
46 | "bad system call", | |
47 | "broken pipe", | |
48 | "alarm clock", | |
49 | "termination", | |
50 | "urgent I/O condition", | |
51 | "stopped", | |
52 | "stopped", | |
53 | "continued", | |
54 | "child exited", | |
55 | "stopped (tty input)", | |
56 | "stopped (tty output)", | |
57 | "I/O possible", | |
58 | "cputime limit exceeded", | |
59 | "filesize limit exceeded", | |
60 | "virtual timer expired", | |
61 | "profiling timer expired", | |
62 | "window size changed", | |
63 | "signal 29", | |
64 | "user defined signal 1", | |
65 | "user defined signal 2", | |
66 | "signal 32" | |
67 | }; | |
68 | ||
69 | cleanup() | |
70 | { | |
71 | union wait stat; | |
72 | char buf[BUFSIZ]; | |
73 | extern int errno; | |
74 | int serrno = errno; | |
75 | ||
76 | buf[0]='\0'; | |
77 | ||
78 | while (wait3(&stat, WNOHANG, 0) > 0) { | |
79 | if (WIFEXITED(stat)) { | |
80 | if (stat.w_retcode) | |
81 | sprintf(buf, | |
82 | "exited with code %d\n", | |
83 | stat.w_retcode); | |
84 | } | |
85 | if (WIFSIGNALED(stat)) { | |
86 | sprintf(buf, "exited on %s signal%s\n", | |
87 | sigdescr[stat.w_termsig], | |
88 | (stat.w_coredump?"; Core dumped":0)); | |
89 | } | |
90 | write(rdpipe[1], buf, strlen(buf)); | |
91 | close(rdpipe[1]); | |
92 | } | |
93 | errno = serrno; | |
94 | } | |
95 | ||
96 | main(argc, argv) | |
97 | { | |
98 | char buf[BUFSIZ]; | |
99 | FILE *log, *prog; | |
100 | int logf, inf, i, done, pid, tty; | |
101 | ||
102 | extern int errno; | |
103 | extern char *sys_errlist[]; | |
104 | ||
105 | int nfds = getdtablesize(); | |
106 | ||
107 | setreuid(0); | |
108 | signal(SIGCHLD, cleanup); | |
109 | ||
110 | logf = open(SMS_LOG_FILE, O_CREAT|O_WRONLY|O_APPEND, 0640); | |
111 | if (logf<0) { | |
112 | perror(SMS_LOG_FILE); | |
113 | exit(1); | |
114 | } | |
115 | inf = open("/dev/null", O_RDONLY , 0); | |
116 | if (inf < 0) { | |
117 | perror("/dev/null"); | |
118 | exit(1); | |
119 | } | |
120 | pipe(rdpipe); | |
121 | if (fork()) { | |
122 | exit(); | |
123 | } | |
124 | chdir("/"); | |
125 | close(0); | |
126 | close(1); | |
127 | close(2); | |
128 | dup2(inf, 0); | |
129 | dup2(inf, 1); | |
130 | dup2(inf, 2); | |
131 | ||
132 | tty = open("/dev/tty"); | |
133 | ioctl(tty, TIOCNOTTY, 0); | |
134 | close(tty); | |
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); | |
142 | execl(SMS_PROG, "smsd", 0); | |
143 | perror("cannot run smsd"); | |
144 | exit(1); | |
145 | } | |
146 | if (pid<0) { | |
147 | perror("sms_starter"); | |
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'; | |
95f3bdce | 172 | fprintf(log, "%s <%d> %s", time_s, pid, buf); |
3c46fcae | 173 | fflush(log); |
174 | } while (!done); | |
95f3bdce | 175 | exit(0); |
3c46fcae | 176 | } |
177 | ||
178 | ||
179 | ||
180 |