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-rw-r--r--coreutils/realpath.c2
-rw-r--r--include/libbb.h1
-rw-r--r--include/usage.h3
-rw-r--r--libbb/xreadlink.c18
-rw-r--r--sysklogd/logread.c140
-rw-r--r--sysklogd/syslogd.c32
6 files changed, 103 insertions, 93 deletions
diff --git a/coreutils/realpath.c b/coreutils/realpath.c
index 5f3242f..7fac471 100644
--- a/coreutils/realpath.c
+++ b/coreutils/realpath.c
@@ -10,8 +10,6 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <limits.h>
-#include <stdlib.h>
#include "busybox.h"
int realpath_main(int argc, char **argv)
diff --git a/include/libbb.h b/include/libbb.h
index 7ee66dc..e92e4db 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -238,6 +238,7 @@ extern DIR *warn_opendir(const char *path);
char *xgetcwd(char *cwd);
char *xreadlink(const char *path);
+char *xmalloc_realpath(const char *path);
extern void xstat(char *filename, struct stat *buf);
extern pid_t spawn(char **argv);
extern pid_t xspawn(char **argv);
diff --git a/include/usage.h b/include/usage.h
index af518de..6202c4a 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3021,7 +3021,8 @@
"\n -R HOST[:PORT] Log to IP or hostname on PORT (default PORT=514/UDP)" \
"\n -L Log locally and via network logging (default is network only)") \
USE_FEATURE_IPC_SYSLOG( \
- "\n -C [size(KiB)] Log to a circular buffer (read the buffer using logread)")
+ "\n -C[size(KiB)] Log to a circular buffer (read the buffer using logread)")
+ /* NB: -Csize shouldn't have space (because size is optional) */
#define syslogd_example_usage \
"$ syslogd -R masterlog:514\n" \
"$ syslogd -R 192.168.1.1:601\n"
diff --git a/libbb/xreadlink.c b/libbb/xreadlink.c
index 14863d9..76f52ca 100644
--- a/libbb/xreadlink.c
+++ b/libbb/xreadlink.c
@@ -4,16 +4,13 @@
* Returns a NULL on failure...
*/
-#include <stdio.h>
+#include "libbb.h"
/*
* NOTE: This function returns a malloced char* that you will have to free
* yourself. You have been warned.
*/
-#include <unistd.h>
-#include "libbb.h"
-
char *xreadlink(const char *path)
{
enum { GROWBY = 80 }; /* how large we will grow strings by */
@@ -36,3 +33,16 @@ char *xreadlink(const char *path)
return buf;
}
+
+char *xmalloc_realpath(const char *path)
+{
+#ifdef __GLIBC__
+ /* glibc provides a non-standard extension */
+ return realpath(path, NULL);
+#else
+ char buf[PATH_MAX+1];
+
+ /* on error returns NULL (xstrdup(NULL) ==NULL) */
+ return xstrdup(realpath(path, buf));
+#endif
+}
diff --git a/sysklogd/logread.c b/sysklogd/logread.c
index 745f976..4427cf3 100644
--- a/sysklogd/logread.c
+++ b/sysklogd/logread.c
@@ -9,46 +9,48 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-
#include "busybox.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
#include <sys/ipc.h>
-#include <sys/types.h>
+//#include <sys/types.h>
#include <sys/sem.h>
#include <sys/shm.h>
-#include <signal.h>
-#include <setjmp.h>
-#include <unistd.h>
+//#include <signal.h>
+//#include <setjmp.h>
+
+#define DEBUG 0
-static const long KEY_ID = 0x414e4547; /*"GENA"*/
+static const long KEY_ID = 0x414e4547; /* "GENA" */
static struct shbuf_ds {
- int size; // size of data written
- int head; // start of message list
- int tail; // end of message list
+ int32_t size; // size of data written
+ int32_t head; // start of message list
+ int32_t tail; // end of message list
char data[1]; // data/messages
-} *buf = NULL; // shared memory pointer
+} *buf; // shared memory pointer
// Semaphore operation structures
static struct sembuf SMrup[1] = {{0, -1, IPC_NOWAIT | SEM_UNDO}}; // set SMrup
static struct sembuf SMrdn[2] = {{1, 0}, {0, +1, SEM_UNDO}}; // set SMrdn
-static int log_shmid = -1; // ipc shared memory id
-static int log_semid = -1; // ipc semaphore id
-static jmp_buf jmp_env;
+static int log_shmid = -1; // ipc shared memory id
+static int log_semid = -1; // ipc semaphore id
-static void error_exit(const char *str);
-static void interrupted(int sig);
+static void error_exit(const char *str) ATTRIBUTE_NORETURN;
+static void error_exit(const char *str)
+{
+ //release all acquired resources
+ if (log_shmid != -1)
+ shmdt(buf);
+ bb_perror_msg_and_die(str);
+}
/*
* sem_up - up()'s a semaphore.
*/
static void sem_up(int semid)
{
- if ( semop(semid, SMrup, 1) == -1 )
+ if (semop(semid, SMrup, 1) == -1)
error_exit("semop[SMrup]");
}
@@ -57,52 +59,59 @@ static void sem_up(int semid)
*/
static void sem_down(int semid)
{
- if ( semop(semid, SMrdn, 2) == -1 )
+ if (semop(semid, SMrdn, 2) == -1)
error_exit("semop[SMrdn]");
}
+static void interrupted(int sig)
+{
+ signal(SIGINT, SIG_IGN);
+ shmdt(buf);
+ exit(0);
+}
+
int logread_main(int argc, char **argv)
{
- int i;
- int follow=0;
+ int cur;
+ int follow = 1;
- if (argc == 2 && argv[1][0]=='-' && argv[1][1]=='f') {
- follow = 1;
- } else {
+ if (argc != 2 || argv[1][0]!='-' || argv[1][1]!='f' ) {
+ follow = 0;
/* no options, no getopt */
if (argc > 1)
bb_show_usage();
}
- // handle interrupt signal
- if (setjmp(jmp_env)) goto output_end;
-
- // attempt to redefine ^C signal
- signal(SIGINT, interrupted);
-
- if ( (log_shmid = shmget(KEY_ID, 0, 0)) == -1)
- error_exit("Can't find circular buffer");
+ log_shmid = shmget(KEY_ID, 0, 0);
+ if (log_shmid == -1)
+ error_exit("can't find circular buffer");
// Attach shared memory to our char*
- if ( (buf = shmat(log_shmid, NULL, SHM_RDONLY)) == NULL)
- error_exit("Can't get access to circular buffer from syslogd");
+ buf = shmat(log_shmid, NULL, SHM_RDONLY);
+ if (buf == NULL)
+ error_exit("can't get access to syslogd buffer");
+
+ log_semid = semget(KEY_ID, 0, 0);
+ if (log_semid == -1)
+ error_exit("can't get access to semaphores for syslogd buffer");
- if ( (log_semid = semget(KEY_ID, 0, 0)) == -1)
- error_exit("Can't get access to semaphore(s) for circular buffer from syslogd");
+ // attempt to redefine ^C signal
+ signal(SIGINT, interrupted);
// Suppose atomic memory move
- i = follow ? buf->tail : buf->head;
+ cur = follow ? buf->tail : buf->head;
do {
#ifdef CONFIG_FEATURE_LOGREAD_REDUCED_LOCKING
char *buf_data;
- int log_len,j;
+ int log_len, j;
#endif
-
sem_down(log_semid);
- //printf("head: %i tail: %i size: %i\n",buf->head,buf->tail,buf->size);
- if (buf->head == buf->tail || i==buf->tail) {
+ if (DEBUG)
+ printf("head:%i cur:%d tail:%i size:%i\n", buf->head, cur, buf->tail, buf->size);
+
+ if (buf->head == buf->tail || cur == buf->tail) {
if (follow) {
sem_up(log_semid);
sleep(1); /* TODO: replace me with a sleep_on */
@@ -114,58 +123,39 @@ int logread_main(int argc, char **argv)
// Read Memory
#ifdef CONFIG_FEATURE_LOGREAD_REDUCED_LOCKING
- log_len = buf->tail - i;
+ log_len = buf->tail - cur;
if (log_len < 0)
log_len += buf->size;
buf_data = xmalloc(log_len);
- if (buf->tail < i) {
- memcpy(buf_data, buf->data+i, buf->size-i);
- memcpy(buf_data+buf->size-i, buf->data, buf->tail);
+ if (buf->tail >= cur) {
+ memcpy(buf_data, buf->data + cur, log_len);
} else {
- memcpy(buf_data, buf->data+i, buf->tail-i);
+ memcpy(buf_data, buf->data + cur, buf->size - cur);
+ memcpy(buf_data + buf->size - cur, buf->data, buf->tail);
}
- i = buf->tail;
-
+ cur = buf->tail;
#else
- while ( i != buf->tail) {
- printf("%s", buf->data+i);
- i+= strlen(buf->data+i) + 1;
- if (i >= buf->size )
- i=0;
+ while (cur != buf->tail) {
+ fputs(buf->data + cur, stdout);
+ cur += strlen(buf->data + cur) + 1;
+ if (cur >= buf->size)
+ cur = 0;
}
#endif
// release the lock on the log chain
sem_up(log_semid);
#ifdef CONFIG_FEATURE_LOGREAD_REDUCED_LOCKING
- for (j=0; j < log_len; j+=strlen(buf_data+j)+1) {
- printf("%s", buf_data+j);
- if (follow)
- fflush(stdout);
+ for (j = 0; j < log_len; j += strlen(buf_data+j) + 1) {
+ fputs(buf_data + j, stdout);
}
free(buf_data);
#endif
fflush(stdout);
} while (follow);
-output_end:
- if (log_shmid != -1)
- shmdt(buf);
+ shmdt(buf);
return EXIT_SUCCESS;
}
-
-static void interrupted(int sig){
- signal(SIGINT, SIG_IGN);
- longjmp(jmp_env, 1);
-}
-
-static void error_exit(const char *str){
- bb_perror_msg(str);
- //release all acquired resources
- if (log_shmid != -1)
- shmdt(buf);
-
- exit(1);
-}
diff --git a/sysklogd/syslogd.c b/sysklogd/syslogd.c
index 9e4bc63..f4644f2 100644
--- a/sysklogd/syslogd.c
+++ b/sysklogd/syslogd.c
@@ -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;
generated by cgit v1.1 at 2024-12-29 16:09:18 +0000