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new libbb func: xmalloc_realpath (+ use it where makes sense)

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syslogd, logread: add debugging code (disabled)
syslogs: drastically smaller bss; fix "-C n" behaviour
This commit is contained in:
Denis Vlasenko
2007-01-04 17:59:59 +00:00
parent ceab8700df
commit a9b60e93ee
6 changed files with 103 additions and 93 deletions
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32
sysklogd/syslogd.c
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@@ -22,19 +22,14 @@
#include <sys/syslog.h>
#include <sys/uio.h>
#define DEBUG 0
/* Path to the unix socket */
static char dev_log_name[MAXPATHLEN];
static char *dev_log_name;
/* Path for the file where all log messages are written */
static const char *logFilePath = "/var/log/messages";
#if ENABLE_FEATURE_ROTATE_LOGFILE
/* max size of message file before being rotated */
static int logFileSize = 200 * 1024;
/* number of rotated message files */
static int logFileRotate = 1;
#endif
/* interval between marks in seconds */
static int markInterval = 20 * 60;
@@ -44,6 +39,13 @@ static int logLevel = 8;
/* localhost's name */
static char localHostName[64];
#if ENABLE_FEATURE_ROTATE_LOGFILE
/* max size of message file before being rotated */
static int logFileSize = 200 * 1024;
/* number of rotated message files */
static int logFileRotate = 1;
#endif
#if ENABLE_FEATURE_REMOTE_LOG
#include <netinet/in.h>
/* udp socket for logging to remote host */
@@ -142,6 +144,9 @@ static void ipcsyslog_cleanup(void)
static void ipcsyslog_init(void)
{
if (DEBUG)
printf("shmget(%lx, %d,...)\n", KEY_ID, shm_size);
shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023);
if (shmid == -1) {
bb_perror_msg_and_die("shmget");
@@ -236,6 +241,8 @@ static void log_to_shmem(const char *msg, int len)
if (semop(s_semid, SMwup, 1) == -1) {
bb_perror_msg_and_die("SMwup");
}
if (DEBUG)
printf("head:%d tail:%d\n", shbuf->head, shbuf->tail);
}
#else
void ipcsyslog_cleanup(void);
@@ -450,10 +457,12 @@ static void do_syslogd(void)
signal(SIGALRM, do_mark);
alarm(markInterval);
dev_log_name = xmalloc_realpath(_PATH_LOG);
if (!dev_log_name)
dev_log_name = _PATH_LOG;
/* Unlink old /dev/log (or object it points to) */
if (realpath(_PATH_LOG, dev_log_name) != NULL) {
unlink(dev_log_name);
}
unlink(dev_log_name);
memset(&sunx, 0, sizeof(sunx));
sunx.sun_family = AF_UNIX;
@@ -520,6 +529,7 @@ int syslogd_main(int argc, char **argv)
char *p;
/* do normal option parsing */
opt_complementary = "=0"; /* no non-option params */
getopt32(argc, argv, OPTION_STR, OPTION_PARAM);
if (option_mask32 & OPT_mark) // -m
markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;