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authorEric Andersen1999-11-25 07:30:46 +0000
committerEric Andersen1999-11-25 07:30:46 +0000
commit3843e96252a823b4fdfc89c61d00342bf011ad88 (patch)
treea177e322b9e77485a609429acfdc43824eca0222 /logger.c
parentb99df0fd65abe3245fa2d04115326100847f865e (diff)
downloadbusybox-3843e96252a823b4fdfc89c61d00342bf011ad88.zip
busybox-3843e96252a823b4fdfc89c61d00342bf011ad88.tar.gz
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Diffstat (limited to 'logger.c')
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+/*
+ * Mini logger implementation for busybox
+ *
+ * Copyright (C) 1999 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "internal.h"
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <ctype.h>
+#include <netdb.h>
+
+#if !defined BB_SYSLOGD
+
+#define SYSLOG_NAMES
+#include <sys/syslog.h>
+
+#else
+/* We have to do this since the header file defines static
+ * structues. Argh.... bad libc, bad, bad...
+ */
+#include <sys/syslog.h>
+typedef struct _code {
+ char *c_name;
+ int c_val;
+} CODE;
+extern CODE prioritynames[];
+extern CODE facilitynames[];
+#endif
+
+static const char logger_usage[] =
+ "logger [OPTION]... [MESSAGE]\n\n"
+ "Write MESSAGE to the system log. If MESSAGE is '-', log stdin.\n\n"
+ "Options:\n"
+ "\t-s\tLog to stderr as well as the system log.\n"
+ "\t-p\tEnter the message with the specified priority.\n"
+ "\t\tThis may be numerical or a ``facility.level'' pair.\n";
+
+
+/* Decode a symbolic name to a numeric value
+ * this function is based on code
+ * Copyright (c) 1983, 1993
+ * The Regents of the University of California. All rights reserved.
+ */
+static int
+decode(char* name, CODE* codetab)
+{
+ CODE *c;
+
+ if (isdigit(*name))
+ return (atoi(name));
+ for (c = codetab; c->c_name; c++) {
+ if (!strcasecmp(name, c->c_name)) {
+ return (c->c_val);
+ }
+ }
+
+ return (-1);
+}
+
+/* Decode a symbolic name to a numeric value
+ * this function is based on code
+ * Copyright (c) 1983, 1993
+ * The Regents of the University of California. All rights reserved.
+ */
+static int
+pencode(char* s)
+{
+ char *save;
+ int lev, fac=LOG_USER;
+
+ for (save = s; *s && *s != '.'; ++s);
+ if (*s) {
+ *s = '\0';
+ fac = decode(save, facilitynames);
+ if (fac < 0) {
+ fprintf(stderr, "unknown facility name: %s\n", save);
+ exit( FALSE);
+ }
+ *s++ = '.';
+ }
+ else {
+ s = save;
+ }
+ lev = decode(s, prioritynames);
+ if (lev < 0) {
+ fprintf(stderr, "unknown priority name: %s\n", save);
+ exit( FALSE);
+ }
+ return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
+}
+
+
+extern int logger_main(int argc, char **argv)
+{
+ struct sockaddr_un sunx;
+ int fd, pri = LOG_USER|LOG_NOTICE;
+ int toStdErrFlag=FALSE;
+ char *message, buf[1024];
+ time_t now;
+ size_t addrLength;
+
+ /* Parse any options */
+ while (--argc > 0 && **(++argv) == '-') {
+ while (*(++(*argv))) {
+ switch (**argv) {
+ case 's':
+ toStdErrFlag = TRUE;
+ break;
+ case 'p':
+ if (--argc == 0) {
+ usage(logger_usage);
+ }
+ pri = pencode(*(++argv));
+ if (--argc == 0) {
+ usage(logger_usage);
+ }
+ ++argv;
+ break;
+ default:
+ usage(logger_usage);
+ }
+ }
+ }
+
+ if (argc>=1)
+ if (**argv=='-') {
+ /* read from stdin */
+ } else {
+ message=*argv;
+ }
+ else {
+ fprintf(stderr, "No message\n");
+ exit( FALSE);
+ }
+
+ memset(&sunx, 0, sizeof(sunx));
+ sunx.sun_family = AF_UNIX; /* Unix domain socket */
+ strncpy(sunx.sun_path, _PATH_LOG, sizeof(sunx.sun_path));
+ if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 ) {
+ perror("Couldn't obtain descriptor for socket " _PATH_LOG);
+ exit( FALSE);
+ }
+
+ addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
+
+ if (connect(fd, (struct sockaddr *) &sunx, addrLength)) {
+ perror("Could not connect to socket " _PATH_LOG);
+ exit( FALSE);
+ }
+
+ time(&now);
+ snprintf (buf, sizeof(buf), "<%d>%.15s %s", pri, ctime(&now)+4, message);
+
+ if (toStdErrFlag==TRUE)
+ fprintf(stderr, "%s\n", buf);
+
+ write( fd, buf, sizeof(buf));
+
+ close(fd);
+ exit( TRUE);
+}
+