109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/*
|
|
* vim:ts=4:sw=4:expandtab
|
|
*
|
|
* i3 - an improved dynamic tiling window manager
|
|
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
|
|
*
|
|
* i3-dump-log/main.c: Dumps the i3 SHM log to stdout.
|
|
*
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <err.h>
|
|
#include <stdint.h>
|
|
#include <getopt.h>
|
|
#include <limits.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "libi3.h"
|
|
#include "shmlog.h"
|
|
#include <i3/ipc.h>
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int o, option_index = 0;
|
|
bool verbose = false;
|
|
|
|
static struct option long_options[] = {
|
|
{"version", no_argument, 0, 'v'},
|
|
{"verbose", no_argument, 0, 'V'},
|
|
{"help", no_argument, 0, 'h'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
|
|
char *options_string = "s:vVh";
|
|
|
|
while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
|
|
if (o == 'v') {
|
|
printf("i3-dump-log " I3_VERSION "\n");
|
|
return 0;
|
|
} else if (o == 'V') {
|
|
verbose = true;
|
|
} else if (o == 'h') {
|
|
printf("i3-dump-log " I3_VERSION "\n");
|
|
printf("i3-dump-log [-s <socket>]\n");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
char *shmname = root_atom_contents("I3_SHMLOG_PATH");
|
|
if (shmname == NULL)
|
|
errx(EXIT_FAILURE, "Cannot get I3_SHMLOG_PATH atom contents. Is i3 running on this display?");
|
|
|
|
if (*shmname == '\0')
|
|
errx(EXIT_FAILURE, "Cannot dump log: SHM logging is disabled in i3.");
|
|
|
|
struct stat statbuf;
|
|
|
|
int logbuffer_shm = shm_open(shmname, O_RDONLY, 0);
|
|
if (logbuffer_shm == -1)
|
|
err(EXIT_FAILURE, "Could not shm_open SHM segment for the i3 log (%s)", shmname);
|
|
|
|
if (fstat(logbuffer_shm, &statbuf) != 0)
|
|
err(EXIT_FAILURE, "stat(%s)", shmname);
|
|
|
|
char *logbuffer = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, logbuffer_shm, 0);
|
|
if (logbuffer == MAP_FAILED)
|
|
err(EXIT_FAILURE, "Could not mmap SHM segment for the i3 log");
|
|
|
|
i3_shmlog_header *header = (i3_shmlog_header*)logbuffer;
|
|
|
|
if (verbose)
|
|
printf("next_write = %d, last_wrap = %d, logbuffer_size = %d, shmname = %s\n",
|
|
header->offset_next_write, header->offset_last_wrap, header->size, shmname);
|
|
int chars;
|
|
char *walk = logbuffer + header->offset_next_write;
|
|
/* Skip the first line, it very likely is mangled. Not a problem, though,
|
|
* the log is chatty enough to have plenty lines left. */
|
|
while (*walk != '\0')
|
|
walk++;
|
|
|
|
/* Print the oldest log lines. We use printf("%s") to stop on \0. */
|
|
while (walk < (logbuffer + header->offset_last_wrap)) {
|
|
chars = printf("%s", walk);
|
|
/* Shortcut: If there are two consecutive \0 bytes, this part of the
|
|
* buffer was never touched. To not call printf() for every byte of the
|
|
* buffer, we directly exit the loop. */
|
|
if (*walk == '\0' && *(walk+1) == '\0')
|
|
break;
|
|
walk += (chars > 0 ? chars : 1);
|
|
}
|
|
|
|
/* Then start from the beginning and print the newer lines */
|
|
walk = logbuffer + sizeof(i3_shmlog_header);
|
|
while (walk < (logbuffer + header->offset_next_write)) {
|
|
chars = printf("%s", walk);
|
|
walk += (chars > 0 ? chars : 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|