#if !defined (BSD43) && !defined(hpux) #ifndef lint static char SccsId[] = "@(#)syslog.c 4.1 (Berkeley) 5/27/83"; #endif #ifndef lint static char ident[] = "@(#)$Id: syslog.c,v 1.1 90/07/20 11:26:41 sharpe Exp $"; #endif lint /* * SYSLOG -- print message on log file * * This routine looks a lot like printf, except that it * outputs to the log file instead of the standard output. * Also, it prints the module name in front of lines, * and has some other formatting types (or will sometime). * Also, it adds a newline on the end of messages. * * The output of this routine is intended to be read by * /etc/syslog, which will add timestamps. */ #include #include #include #include "syslog.h" #include #define MAXLINE 1024 /* max message size */ #define BUFSLOP 20 /* space to allow for "extra stuff" */ #define NULL 0 /* manifest */ #define LOG_COOLIT LOG_LOCAL0 /* local syslog code */ #define LOG_DGRAM LOG_LOCAL1 /* idem */ #ifndef LOG_HOST #define LOG_HOST "localhost" /* host where syslogd is running */ #endif LOG_HOST int LogFile = -1; /* fd for log */ int LogStat = 0; /* status bits, set by initlog */ char *LogTag = NULL; /* string to tag the entry with */ int LogMask = LOG_DEBUG; /* lowest priority to be logged */ struct sockaddr_in SyslogAddr; static char *SyslogHost = LOG_HOST; extern int errno, sys_nerr; extern char *sys_errlist[]; syslog(pri, fmt, p0, p1, p2, p3, p4) int pri; char *fmt; { char buf[MAXLINE+BUFSLOP], outline[MAXLINE + 1]; register char *b, *f; if (LogFile < 0) openlog(0, 0); /* see if we should just throw out this message */ if (pri > LogMask) return; for (b = buf, f = fmt; f && *f; b = buf) { register char c; if (pri > 0 && (LogStat & LOG_COOLIT) == 0) { sprintf(b, "", pri); b += strlen(b); } if (LogStat & LOG_PID) { sprintf(b, "%d ", getpid()); b += strlen(b); } if (LogTag) { sprintf(b, "%s: ", LogTag); b += strlen(b); } while ((c = *f++) != '\0' && c != '\n' && b < buf + MAXLINE) { if (c != '%') { *b++ = c; continue; } c = *f++; if (c != 'm') { #ifndef UCI *b++ = '%', *b++ = c, *b++ = '\0'; #else UCI *b++ = '%', *b++ = c; #endif UCI continue; } if ((unsigned)errno > sys_nerr) sprintf(b, "error %d", errno); else strcat(b, sys_errlist[errno]); b += strlen(b); } if (c == '\0') f--; *b++ = '\n', *b = '\0'; sprintf(outline, buf, p0, p1, p2, p3, p4); errno = 0; if (LogStat & LOG_DGRAM) (void) sendto(LogFile, outline, strlen(outline), 0, &SyslogAddr, sizeof SyslogAddr); else (void) write(LogFile, outline, strlen(outline)); if (errno) perror("syslog: sendto"); } } /* * OPENLOG -- open system log */ openlog(ident, logstat) char *ident; int logstat; { struct servent *sp; struct hostent *hp; LogTag = ident; LogStat = logstat; if (LogFile >= 0) return; sp = getservbyname("syslog", "udp"); hp = gethostbyname(SyslogHost); if (sp == NULL || hp == NULL) goto bad; LogFile = socket(AF_INET, SOCK_DGRAM, 0); if (LogFile < 0) { perror("syslog: socket"); goto bad; } bzero(&SyslogAddr, sizeof SyslogAddr); SyslogAddr.sin_family = hp->h_addrtype; bcopy(hp->h_addr, (char *)&SyslogAddr.sin_addr, hp->h_length); SyslogAddr.sin_port = sp->s_port; LogStat |= LOG_DGRAM; return; bad: LogStat |= LOG_COOLIT; LogStat &= ~LOG_DGRAM; LogMask = LOG_CRIT; LogFile = open("/dev/console", 1); if (LogFile < 0) { perror("syslog: /dev/console"); LogFile = 2; } } /* * CLOSELOG -- close the system log */ closelog() { (void) close(LogFile); LogFile = -1; } #endif not BSD43
