diff options
Diffstat (limited to 'usr.sbin/syslogd/log.c')
| -rw-r--r-- | usr.sbin/syslogd/log.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/usr.sbin/syslogd/log.c b/usr.sbin/syslogd/log.c new file mode 100644 index 00000000000..845966792a4 --- /dev/null +++ b/usr.sbin/syslogd/log.c @@ -0,0 +1,208 @@ +/* $OpenBSD: log.c,v 1.1 2017/03/16 23:55:19 bluhm Exp $ */ + +/* + * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> + * Copyright (c) 2017 Alexander Bluhm <bluhm@openbsd.org> + * + * 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 <errno.h> +#include <stdio.h> +#include <string.h> +#include <syslog.h> +#include <time.h> + +#include "log.h" +#include "syslogd.h" + +static int debug; +static int verbose; +static int facility; +static const char *log_procname; + +void +log_init(int n_debug, int fac) +{ + extern char *__progname; + + debug = n_debug; + verbose = n_debug; + facility = fac; + log_procinit(__progname); + + tzset(); +} + +void +log_procinit(const char *procname) +{ + if (procname != NULL) + log_procname = procname; +} + +void +log_setdebug(int d) +{ + debug = d; +} + +int +log_getdebug(void) +{ + return (debug); +} + +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 ebuf[ERRBUFSIZE]; + size_t l; + int saved_errno = errno; + + if (debug) { + l = snprintf(ebuf, sizeof(ebuf), "%s: ", log_procname); + if (l < sizeof(ebuf)) + vsnprintf(ebuf+l, sizeof(ebuf)-l, fmt, ap); + fprintf(stderr, "%s\n", ebuf); + fflush(stderr); + } else + vlogmsg(pri, log_procname, fmt, ap); + + errno = saved_errno; +} + +void +log_warn(const char *emsg, ...) +{ + char ebuf[ERRBUFSIZE]; + size_t l; + 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); + l = vsnprintf(ebuf, sizeof(ebuf), emsg, ap); + if (l < sizeof(ebuf)) + snprintf(ebuf+l, sizeof(ebuf)-l, ": %s", + strerror(saved_errno)); + logit(LOG_ERR, "%s", ebuf); + 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(int pri, const char *emsg, ...) +{ + va_list ap; + + va_start(ap, emsg); + vlog(pri, emsg, ap); + va_end(ap); +} + +void +log_debug(const char *emsg, ...) +{ + char ebuf[ERRBUFSIZE]; + va_list ap; + int saved_errno; + + if (verbose) { + saved_errno = errno; + va_start(ap, emsg); + vsnprintf(ebuf, sizeof(ebuf), emsg, ap); + fprintf(stderr, "%s\n", ebuf); + fflush(stderr); + va_end(ap); + errno = saved_errno; + } +} + +static void +vfatalc(int error, const char *emsg, va_list ap) +{ + char ebuf[ERRBUFSIZE]; + const char *sep; + + if (emsg != NULL) { + (void)vsnprintf(ebuf, sizeof(ebuf), emsg, ap); + sep = ": "; + } else { + ebuf[0] = '\0'; + sep = ""; + } + if (error) + logit(LOG_CRIT, "fatal in %s: %s%s%s", + log_procname, ebuf, sep, strerror(error)); + else + logit(LOG_CRIT, "fatal in %s%s%s", log_procname, sep, ebuf); +} + +void +fatal(const char *emsg, ...) +{ + va_list ap; + + va_start(ap, emsg); + vfatalc(errno, emsg, ap); + va_end(ap); + die(0); +} + +void +fatalx(const char *emsg, ...) +{ + va_list ap; + + va_start(ap, emsg); + vfatalc(0, emsg, ap); + va_end(ap); + die(0); +} |