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165 lines
5.3 KiB
165 lines
5.3 KiB
From 1e0289af99737049de97b8cfe342b56d380560bf Mon Sep 17 00:00:00 2001 |
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From: Karel Zak <kzak@redhat.com> |
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Date: Thu, 16 Mar 2017 12:20:58 +0100 |
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Subject: [PATCH 091/116] logger: backport --size |
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1323916 |
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Signed-off-by: Karel Zak <kzak@redhat.com> |
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--- |
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misc-utils/logger.1 | 6 ++++++ |
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misc-utils/logger.c | 34 ++++++++++++++++++++++++---------- |
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2 files changed, 30 insertions(+), 10 deletions(-) |
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diff --git a/misc-utils/logger.1 b/misc-utils/logger.1 |
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index 8c4faca..57ca0d5 100644 |
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--- a/misc-utils/logger.1 |
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+++ b/misc-utils/logger.1 |
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@@ -98,6 +98,12 @@ logs the message as informational in the local3 facility. |
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The default is |
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.IR user.notice . |
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.TP |
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+\fB\-S\fR, \fB\-\-size\fR \fIsize\fR |
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+Sets the maximum permitted message size. The default is 1KiB, which is |
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+the limit traditionally used and specified in RFC 3164. When selecting a |
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+maximum message size, it is important to ensure that the receiver supports |
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+the max size as well, otherwise messages may become truncated. |
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+.TP |
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\fB\-s\fR, \fB\-\-stderr\fR |
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Output the message to standard error as well as to the system log. |
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.TP |
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diff --git a/misc-utils/logger.c b/misc-utils/logger.c |
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index a331869..dfda018 100644 |
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--- a/misc-utils/logger.c |
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+++ b/misc-utils/logger.c |
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@@ -54,6 +54,8 @@ |
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#include "closestream.h" |
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#include "nls.h" |
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#include "strutils.h" |
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+#include "xalloc.h" |
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+#include "all-io.h" |
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#define SYSLOG_NAMES |
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#include <syslog.h> |
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@@ -183,7 +185,7 @@ inet_socket(const char *servername, const char *port, const int socket_type) |
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static void |
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mysyslog(int fd, int logflags, int pri, char *tag, char *msg) { |
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- char buf[1000], pid[30], *cp, *tp; |
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+ char *buf, pid[30], *cp, *tp; |
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time_t now; |
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if (fd > -1) { |
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@@ -201,11 +203,11 @@ mysyslog(int fd, int logflags, int pri, char *tag, char *msg) { |
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(void)time(&now); |
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tp = ctime(&now)+4; |
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- snprintf(buf, sizeof(buf), "<%d>%.15s %.200s%s: %.400s", |
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+ xasprintf(&buf, "<%d>%.15s %.200s%s: %s", |
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pri, tp, cp, pid, msg); |
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- if (write(fd, buf, strlen(buf)+1) < 0) |
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- return; /* error */ |
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+ write_all(fd, buf, strlen(buf)+1); |
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+ free(buf); |
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} |
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} |
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@@ -221,6 +223,7 @@ static void __attribute__ ((__noreturn__)) usage(FILE *out) |
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" -i, --id log the process ID too\n" |
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" -f, --file <file> log the contents of this file\n" |
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" -h, --help display this help text and exit\n"), out); |
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+ fputs(_(" -S, --size <num> maximum size for a single message (default 1024)\n"), out); |
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fputs(_(" -n, --server <name> write to this remote syslog server\n" |
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" -P, --port <port> use this port for UDP or TCP connection\n" |
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" -p, --priority <prio> mark given message with this priority\n" |
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@@ -241,11 +244,12 @@ static void __attribute__ ((__noreturn__)) usage(FILE *out) |
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int |
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main(int argc, char **argv) { |
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int ch, logflags, pri; |
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- char *tag, buf[1024]; |
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+ char *tag, *buf; |
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char *usock = NULL; |
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char *server = NULL; |
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char *port = NULL; |
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int LogSock = -1, socket_type = ALL_TYPES; |
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+ size_t max_message_size = 1024; |
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static const struct option longopts[] = { |
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{ "id", no_argument, 0, 'i' }, |
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@@ -253,6 +257,7 @@ main(int argc, char **argv) { |
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{ "file", required_argument, 0, 'f' }, |
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{ "priority", required_argument, 0, 'p' }, |
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{ "tag", required_argument, 0, 't' }, |
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+ { "size", required_argument, 0, 'S' }, |
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{ "socket", required_argument, 0, 'u' }, |
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{ "udp", no_argument, 0, 'd' }, |
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{ "tcp", no_argument, 0, 'T' }, |
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@@ -271,7 +276,7 @@ main(int argc, char **argv) { |
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tag = NULL; |
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pri = LOG_NOTICE; |
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logflags = 0; |
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- while ((ch = getopt_long(argc, argv, "f:ip:st:u:dTn:P:Vh", |
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+ while ((ch = getopt_long(argc, argv, "f:ip:st:u:dTn:P:S:Vh", |
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longopts, NULL)) != -1) { |
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switch((char)ch) { |
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case 'f': /* file to log */ |
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@@ -297,6 +302,10 @@ main(int argc, char **argv) { |
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case 'd': |
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socket_type = TYPE_UDP; |
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break; |
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+ case 'S': |
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+ max_message_size = strtosize_or_err(optarg, |
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+ _("failed to parse message size")); |
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+ break; |
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case 'T': |
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socket_type = TYPE_TCP; |
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break; |
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@@ -327,21 +336,23 @@ main(int argc, char **argv) { |
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else |
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openlog(tag ? tag : getlogin(), logflags, 0); |
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+ buf = xcalloc(1, max_message_size); |
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+ |
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/* log input line if appropriate */ |
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if (argc > 0) { |
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register char *p, *endp; |
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size_t len; |
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- for (p = buf, endp = buf + sizeof(buf) - 2; *argv;) { |
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+ for (p = buf, endp = buf + max_message_size - 2; *argv;) { |
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len = strlen(*argv); |
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if (p + len > endp && p > buf) { |
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if (!usock && !server) |
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syslog(pri, "%s", buf); |
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else |
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mysyslog(LogSock, logflags, pri, tag, buf); |
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- p = buf; |
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+ p = buf; |
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} |
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- if (len > sizeof(buf) - 1) { |
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+ if (len > max_message_size - 1) { |
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if (!usock && !server) |
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syslog(pri, "%s", *argv++); |
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else |
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@@ -360,7 +371,7 @@ main(int argc, char **argv) { |
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mysyslog(LogSock, logflags, pri, tag, buf); |
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} |
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} else { |
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- while (fgets(buf, sizeof(buf), stdin) != NULL) { |
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+ while (fgets(buf, max_message_size, stdin) != NULL) { |
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/* glibc is buggy and adds an additional newline, |
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so we have to remove it here until glibc is fixed */ |
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int len = strlen(buf); |
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@@ -374,6 +385,9 @@ main(int argc, char **argv) { |
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mysyslog(LogSock, logflags, pri, tag, buf); |
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} |
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} |
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+ |
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+ free(buf); |
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+ |
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if (!usock && !server) |
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closelog(); |
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else |
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-- |
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2.9.3 |
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