/* $OpenBSD: log.c,v 1.1.1.1 2022/09/01 14:20:34 martijn Exp $ */ /* * Copyright (c) 2003, 2004 Henning Brauer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include static int debug; static int verbose; const char *log_procname; void log_init(int, int); void log_procinit(const char *); void log_setverbose(int); int log_getverbose(void); void log_warn(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_warnx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_info(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_debug(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void logit(int, const char *, ...) __attribute__((__format__ (printf, 2, 3))); void vlog(int, const char *, va_list) __attribute__((__format__ (printf, 2, 0))); __dead void fatal(const char *, ...) __attribute__((__format__ (printf, 1, 2))); __dead void fatalx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_init(int n_debug, int facility) { extern char *__progname; debug = n_debug; verbose = n_debug; log_procinit(__progname); if (!debug) openlog(__progname, LOG_PID | LOG_NDELAY, facility); tzset(); } void log_procinit(const char *procname) { if (procname != NULL) log_procname = procname; } void log_setverbose(int v) { verbose = v; } int log_getverbose(void) { return (verbose); } void logit(int pri, const char *fmt, ...) { va_list ap; va_start(ap, fmt); vlog(pri, fmt, ap); va_end(ap); } void vlog(int pri, const char *fmt, va_list ap) { char *nfmt; int saved_errno = errno; if (debug) { /* best effort in out of mem situations */ if (asprintf(&nfmt, "%s\n", fmt) == -1) { vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); } else { vfprintf(stderr, nfmt, ap); free(nfmt); } fflush(stderr); } else vsyslog(pri, fmt, ap); errno = saved_errno; } void log_warn(const char *emsg, ...) { char *nfmt; va_list ap; int saved_errno = errno; /* best effort to even work in out of memory situations */ if (emsg == NULL) logit(LOG_ERR, "%s", strerror(saved_errno)); else { va_start(ap, emsg); if (asprintf(&nfmt, "%s: %s", emsg, strerror(saved_errno)) == -1) { /* we tried it... */ vlog(LOG_ERR, emsg, ap); logit(LOG_ERR, "%s", strerror(saved_errno)); } else { vlog(LOG_ERR, nfmt, ap); free(nfmt); } va_end(ap); } errno = saved_errno; } void log_warnx(const char *emsg, ...) { va_list ap; va_start(ap, emsg); vlog(LOG_ERR, emsg, ap); va_end(ap); } void log_info(const char *emsg, ...) { va_list ap; va_start(ap, emsg); vlog(LOG_INFO, emsg, ap); va_end(ap); } void log_debug(const char *emsg, ...) { va_list ap; if (verbose > 1) { va_start(ap, emsg); vlog(LOG_DEBUG, emsg, ap); va_end(ap); } } static void vfatalc(int code, const char *emsg, va_list ap) { static char s[BUFSIZ]; const char *sep; if (emsg != NULL) { (void)vsnprintf(s, sizeof(s), emsg, ap); sep = ": "; } else { s[0] = '\0'; sep = ""; } if (code) logit(LOG_CRIT, "%s: %s%s%s", log_procname, s, sep, strerror(code)); else logit(LOG_CRIT, "%s%s%s", log_procname, sep, s); } void fatal(const char *emsg, ...) { va_list ap; va_start(ap, emsg); vfatalc(errno, emsg, ap); va_end(ap); exit(1); } void fatalx(const char *emsg, ...) { va_list ap; va_start(ap, emsg); vfatalc(0, emsg, ap); va_end(ap); exit(1); }