lpd: avoid SEGVing on immediate EOF from peer

[oweals/busybox.git] / sysklogd / logger.c

diff --git a/sysklogd/logger.c b/sysklogd/logger.c
index ff15191923067983a2a57911ea24f3b08a38ca56..4d692d6fc6a75ffa217a032ff8308e210af4a1ff 100644 (file)
--- a/sysklogd/logger.c
+++ b/sysklogd/logger.c
@@ -6,6 +6,30 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config LOGGER
+//config:      bool "logger (6.3 kb)"
+//config:      default y
+//config:      select FEATURE_SYSLOG
+//config:      help
+//config:      The logger utility allows you to send arbitrary text
+//config:      messages to the system log (i.e. the 'syslogd' utility) so
+//config:      they can be logged. This is generally used to help locate
+//config:      problems that occur within programs and scripts.
+
+//applet:IF_LOGGER(APPLET(logger, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_LOGGER) += syslogd_and_logger.o
+
+//usage:#define logger_trivial_usage
+//usage:       "[OPTIONS] [MESSAGE]"
+//usage:#define logger_full_usage "\n\n"
+//usage:       "Write MESSAGE (or stdin) to syslog\n"
+//usage:     "\n       -s      Log to stderr as well as the system log"
+//usage:     "\n       -t TAG  Log using the specified tag (defaults to user name)"
+//usage:     "\n       -p PRIO Priority (numeric or facility.level pair)"
+//usage:
+//usage:#define logger_example_usage
+//usage:       "$ logger \"hello\"\n"
 
 /*
  * Done in syslogd_and_logger.c:
@@ -53,14 +77,14 @@ static int pencode(char *s)
                ;
        if (*s) {
                *s = '\0';
-               fac = decode(save, facilitynames);
+               fac = decode(save, bb_facilitynames);
                if (fac < 0)
                        bb_error_msg_and_die("unknown %s name: %s", "facility", save);
                *s++ = '.';
        } else {
                s = save;
        }
-       lev = decode(s, prioritynames);
+       lev = decode(s, bb_prioritynames);
        if (lev < 0)
                bb_error_msg_and_die("unknown %s name: %s", "priority", save);
        return ((lev & LOG_PRIMASK) | (fac & LOG_FACMASK));
@@ -75,6 +99,8 @@ int logger_main(int argc UNUSED_PARAM, char **argv)
        int opt;
        int i = 0;
 
+       setup_common_bufsiz();
+
        /* Fill out the name string early (may be overwritten later) */
        str_t = uid2uname_utoa(geteuid());
 
@@ -121,7 +147,7 @@ int logger_main(int argc UNUSED_PARAM, char **argv)
 
 /*-
  * Copyright (c) 1983, 1993
- *     The Regents of the University of California.  All rights reserved.
+ * The Regents of the University of California.  All rights reserved.
  *
  * This is the original license statement for the decode and pencode functions.
  *
@@ -134,14 +160,14 @@ int logger_main(int argc UNUSED_PARAM, char **argv)
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
- * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
- *             ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ *    ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
  *
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE