Commit | Line | Data |
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bb0cfa24 | 1 | /* |
c5282f4a MK |
2 | * Copyright (c) 1983, 1988 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
9e31603f KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bb0cfa24 DF |
16 | */ |
17 | ||
2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
9e31603f | 19 | static char sccsid[] = "@(#)syslog.c 5.16 (Berkeley) %G%"; |
c5282f4a MK |
20 | #endif /* LIBC_SCCS and not lint */ |
21 | ||
b97c7a10 SL |
22 | /* |
23 | * SYSLOG -- print message on log file | |
24 | * | |
25 | * This routine looks a lot like printf, except that it | |
26 | * outputs to the log file instead of the standard output. | |
bc51229a RC |
27 | * Also: |
28 | * adds a timestamp, | |
29 | * prints the module name in front of the message, | |
30 | * has some other formatting types (or will sometime), | |
31 | * adds a newline on the end of the message. | |
b97c7a10 | 32 | * |
bc51229a | 33 | * The output of this routine is intended to be read by /etc/syslogd. |
4d707151 RC |
34 | * |
35 | * Author: Eric Allman | |
36 | * Modified to use UNIX domain IPC by Ralph Campbell | |
b97c7a10 | 37 | */ |
bc51229a | 38 | |
b97c7a10 SL |
39 | #include <sys/types.h> |
40 | #include <sys/socket.h> | |
bc51229a | 41 | #include <sys/file.h> |
a52c86c2 MK |
42 | #include <sys/signal.h> |
43 | #include <sys/syslog.h> | |
b97c7a10 | 44 | #include <netdb.h> |
a52c86c2 | 45 | #include <strings.h> |
b97c7a10 | 46 | |
bc51229a RC |
47 | #define MAXLINE 1024 /* max message size */ |
48 | #define NULL 0 /* manifest */ | |
49 | ||
a05c1f2b | 50 | #define IMPORTANT LOG_ERR |
5cd7a5ab | 51 | |
bc51229a RC |
52 | static char logname[] = "/dev/log"; |
53 | static char ctty[] = "/dev/console"; | |
b97c7a10 | 54 | |
bc51229a | 55 | static int LogFile = -1; /* fd for log */ |
12d303b4 | 56 | static int connected; /* have done connect */ |
bc51229a | 57 | static int LogStat = 0; /* status bits, set by openlog() */ |
a05c1f2b EA |
58 | static char *LogTag = "syslog"; /* string to tag the entry with */ |
59 | static int LogMask = 0xff; /* mask of priorities to be logged */ | |
60 | static int LogFacility = LOG_USER; /* default facility code */ | |
b97c7a10 | 61 | |
a05c1f2b | 62 | static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */ |
b97c7a10 SL |
63 | |
64 | extern int errno, sys_nerr; | |
65 | extern char *sys_errlist[]; | |
66 | ||
67 | syslog(pri, fmt, p0, p1, p2, p3, p4) | |
68 | int pri; | |
69 | char *fmt; | |
70 | { | |
bc51229a RC |
71 | char buf[MAXLINE + 1], outline[MAXLINE + 1]; |
72 | register char *b, *f, *o; | |
73 | register int c; | |
74 | long now; | |
4d707151 | 75 | int pid, olderrno = errno; |
b97c7a10 | 76 | |
b97c7a10 | 77 | /* see if we should just throw out this message */ |
12d303b4 MK |
78 | if ((unsigned) LOG_FAC(pri) >= LOG_NFACILITIES || |
79 | LOG_MASK(LOG_PRI(pri)) == 0 || | |
17d49c2f | 80 | (pri &~ (LOG_PRIMASK|LOG_FACMASK)) != 0) |
b97c7a10 | 81 | return; |
12d303b4 | 82 | if (LogFile < 0 || !connected) |
fadfb2f6 | 83 | openlog(LogTag, LogStat | LOG_NDELAY, 0); |
a05c1f2b EA |
84 | |
85 | /* set default facility if none specified */ | |
86 | if ((pri & LOG_FACMASK) == 0) | |
87 | pri |= LogFacility; | |
88 | ||
89 | /* build the message */ | |
bc51229a | 90 | o = outline; |
06eef7c4 | 91 | (void)sprintf(o, "<%d>", pri); |
4d707151 | 92 | o += strlen(o); |
a05c1f2b | 93 | time(&now); |
06eef7c4 | 94 | (void)sprintf(o, "%.15s ", ctime(&now) + 4); |
a05c1f2b | 95 | o += strlen(o); |
bc51229a RC |
96 | if (LogTag) { |
97 | strcpy(o, LogTag); | |
98 | o += strlen(o); | |
99 | } | |
100 | if (LogStat & LOG_PID) { | |
06eef7c4 | 101 | (void)sprintf(o, "[%d]", getpid()); |
bc51229a RC |
102 | o += strlen(o); |
103 | } | |
a05c1f2b EA |
104 | if (LogTag) { |
105 | strcpy(o, ": "); | |
106 | o += 2; | |
107 | } | |
b97c7a10 | 108 | |
bc51229a RC |
109 | b = buf; |
110 | f = fmt; | |
111 | while ((c = *f++) != '\0' && c != '\n' && b < &buf[MAXLINE]) { | |
112 | if (c != '%') { | |
113 | *b++ = c; | |
114 | continue; | |
b97c7a10 | 115 | } |
bc51229a RC |
116 | if ((c = *f++) != 'm') { |
117 | *b++ = '%'; | |
118 | *b++ = c; | |
119 | continue; | |
b97c7a10 | 120 | } |
4d707151 | 121 | if ((unsigned)olderrno > sys_nerr) |
06eef7c4 | 122 | (void)sprintf(b, "error %d", olderrno); |
b97c7a10 | 123 | else |
4d707151 | 124 | strcpy(b, sys_errlist[olderrno]); |
bc51229a | 125 | b += strlen(b); |
b97c7a10 | 126 | } |
bc51229a RC |
127 | *b++ = '\n'; |
128 | *b = '\0'; | |
06eef7c4 | 129 | (void)sprintf(o, buf, p0, p1, p2, p3, p4); |
bc51229a RC |
130 | c = strlen(outline); |
131 | if (c > MAXLINE) | |
132 | c = MAXLINE; | |
a05c1f2b EA |
133 | |
134 | /* output the message to the local logger */ | |
12d303b4 | 135 | if (send(LogFile, outline, c, 0) >= 0) |
bc51229a | 136 | return; |
c229b84c | 137 | if (!(LogStat & LOG_CONS)) |
bc51229a | 138 | return; |
a05c1f2b EA |
139 | |
140 | /* output the message to the console */ | |
fe98dde4 | 141 | pid = vfork(); |
bc51229a RC |
142 | if (pid == -1) |
143 | return; | |
144 | if (pid == 0) { | |
ad1bd1a6 MK |
145 | int fd; |
146 | ||
ba519163 | 147 | signal(SIGALRM, SIG_DFL); |
1b43787d | 148 | sigsetmask(sigblock(0L) & ~sigmask(SIGALRM)); |
ba519163 | 149 | alarm(5); |
ad1bd1a6 | 150 | fd = open(ctty, O_WRONLY); |
ba519163 | 151 | alarm(0); |
5cd7a5ab | 152 | strcat(o, "\r"); |
a52c86c2 | 153 | o = index(outline, '>') + 1; |
ad1bd1a6 MK |
154 | write(fd, o, c + 1 - (o - outline)); |
155 | close(fd); | |
156 | _exit(0); | |
bc51229a | 157 | } |
c229b84c MK |
158 | if (!(LogStat & LOG_NOWAIT)) |
159 | while ((c = wait((int *)0)) > 0 && c != pid) | |
160 | ; | |
b97c7a10 SL |
161 | } |
162 | ||
163 | /* | |
164 | * OPENLOG -- open system log | |
165 | */ | |
a05c1f2b EA |
166 | |
167 | openlog(ident, logstat, logfac) | |
b97c7a10 | 168 | char *ident; |
a05c1f2b | 169 | int logstat, logfac; |
b97c7a10 | 170 | { |
a05c1f2b EA |
171 | if (ident != NULL) |
172 | LogTag = ident; | |
b97c7a10 | 173 | LogStat = logstat; |
c5282f4a MK |
174 | if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0) |
175 | LogFacility = logfac; | |
12d303b4 MK |
176 | if (LogFile == -1) { |
177 | SyslogAddr.sa_family = AF_UNIX; | |
178 | strncpy(SyslogAddr.sa_data, logname, sizeof SyslogAddr.sa_data); | |
179 | if (LogStat & LOG_NDELAY) { | |
180 | LogFile = socket(AF_UNIX, SOCK_DGRAM, 0); | |
181 | fcntl(LogFile, F_SETFD, 1); | |
182 | } | |
5cd7a5ab | 183 | } |
12d303b4 MK |
184 | if (LogFile != -1 && !connected && |
185 | connect(LogFile, &SyslogAddr, sizeof(SyslogAddr)) != -1) | |
186 | connected = 1; | |
b97c7a10 SL |
187 | } |
188 | ||
189 | /* | |
190 | * CLOSELOG -- close the system log | |
191 | */ | |
fadfb2f6 | 192 | |
b97c7a10 SL |
193 | closelog() |
194 | { | |
195 | ||
196 | (void) close(LogFile); | |
197 | LogFile = -1; | |
12d303b4 | 198 | connected = 0; |
b97c7a10 | 199 | } |
bc51229a RC |
200 | |
201 | /* | |
202 | * SETLOGMASK -- set the log mask level | |
203 | */ | |
df714f23 RC |
204 | setlogmask(pmask) |
205 | int pmask; | |
bc51229a | 206 | { |
df714f23 | 207 | int omask; |
bc51229a | 208 | |
df714f23 RC |
209 | omask = LogMask; |
210 | if (pmask != 0) | |
211 | LogMask = pmask; | |
212 | return (omask); | |
bc51229a | 213 | } |