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authorthe xhr <xhr@giessen.ccc.de>2021-08-24 21:22:29 +0200
committerthe xhr <xhr@giessen.ccc.de>2021-08-24 21:22:29 +0200
commitf224a3fe688bf2ae4c108d6b4359df4d8f03db99 (patch)
tree1d9d6fdce5671be7ae5754f51c6ef5b47bf7f0c1 /log.c
parent0f9f2d04f9c340c761a9c900fac1c225b5a05419 (diff)
Initial commit of twind - a small and simple gemini daemon
Diffstat (limited to 'log.c')
-rw-r--r--log.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/log.c b/log.c
new file mode 100644
index 0000000..eca6308
--- /dev/null
+++ b/log.c
@@ -0,0 +1,287 @@
+/* $OpenBSD: log.c,v 1.1 2018/07/10 16:39:54 florian Exp $ */
+
+/*
+ * Copyright (c) 2003, 2004 Henning Brauer <henning@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.
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <syslog.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+
+#include "log.h"
+#include "twind.h"
+
+#define MAXLOGLINE 1024
+
+static int debug;
+static int verbose;
+static int access_fd;
+static int error_fd;
+
+static const char *log_procname;
+
+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) {
+ 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, "fatal in %s: %s%s%s",
+ log_procname, s, sep, strerror(code));
+ else
+ logit(LOG_CRIT, "fatal in %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);
+}
+
+void
+open_twind_logs(void)
+{
+ if ((access_fd = open(_PATH_TWIND_ACCESS_LOG, O_WRONLY|O_APPEND|O_CREAT, 0644))
+ == -1)
+ fatalx("Cannot open access log: %s", _PATH_TWIND_ACCESS_LOG);
+
+ if ((error_fd = open(_PATH_TWIND_ERROR_LOG, O_WRONLY|O_APPEND|O_CREAT, 0644))
+ == -1)
+ fatalx("Cannot open error log: %s", _PATH_TWIND_ACCESS_LOG);
+
+ return;
+}
+
+void
+close_twind_logs(void)
+{
+ close(access_fd);
+ close(error_fd);
+}
+
+void
+log_access(const struct client_connection *cc, const char *fmt, ...)
+{
+ struct tm tm;
+ time_t t;
+
+ t = time(NULL);
+ tm = *localtime(&t);
+
+ user_log(0, "%s - - [%d/%d/%d:%d:%d:%d %s] %s", cc->client_addr,
+ tm.tm_mday, tm.tm_mon, tm.tm_year+1900,
+ tm.tm_hour, tm.tm_min, tm.tm_sec,
+ tm.tm_zone, fmt);
+}
+
+void
+log_error(const struct client_connection *cc, const char *fmt, ...)
+{
+ struct tm tm;
+ time_t t;
+
+ t = time(NULL);
+ tm = *localtime(&t);
+
+ user_log(1, "[%d/%d/%d:%d:%d:%d %s] [error] [client %s] %s",
+ tm.tm_mday, tm.tm_mon, tm.tm_year+1900,
+ tm.tm_hour, tm.tm_min, tm.tm_sec,
+ tm.tm_zone,
+ cc->client_addr,
+ fmt);
+}
+
+void
+user_log(int target, const char *fmt, ...)
+{
+ va_list ap;
+ int fd = -1;
+
+ va_start(ap, fmt);
+ if (target == 0)
+ fd = access_fd;
+ else if (target == 1)
+ fd = error_fd;
+ else {
+ log_warn("Non-existent user log target");
+ return;
+ }
+
+ vdprintf(fd, fmt, ap);
+ dprintf(fd, "\n");
+
+ va_end(ap);
+}
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