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#10 Process specific backup log files

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A process will open outbuf/inbuf.pid.log and move it to the outbuf/inbuf.log upon close, allowing for multiple processes to be open at once
This commit is contained in:
Aaron Cook 2023-05-08 10:00:37 -05:00
commit 1989c36886
5 changed files with 96 additions and 21 deletions
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53
src/cheerios.c
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@ -25,7 +25,6 @@ int
cheerios_start(bytenuts_t *bytenuts)
{
char *home = getenv("HOME");
char *cwd;
memset(&cheerios, 0, sizeof(cheerios_t));
@ -43,11 +42,25 @@ cheerios_start(bytenuts_t *bytenuts)
}
}
cwd = getcwd(NULL, 0);
chdir(home);
cheerios.backup = fopen(".config/bytenuts/outbuf.log", "w");
chdir(cwd);
free(cwd);
if (home) {
pid_t pid;
int name_len;
/* ensure that a process has a unique log */
pid = getpid();
name_len = snprintf(
NULL, 0,
"%s/.config/bytenuts/outbuf.%d.log",
home, pid
);
cheerios.backup_filename = calloc(1, name_len + 1);
snprintf(
cheerios.backup_filename, name_len + 1,
"%s/.config/bytenuts/outbuf.%d.log",
home, pid
);
cheerios.backup = fopen(cheerios.backup_filename, "w");
}
pthread_cond_init(&cheerios.cond, NULL);
pthread_mutex_init(&cheerios.lock, NULL);
@ -138,7 +151,6 @@ cheerios_stop()
{
cheerios.running = 0;
pthread_join(cheerios.thr, NULL);
return 0;
}
@ -338,8 +350,33 @@ cheerios_thread(void *arg)
if (cheerios.log)
fclose(cheerios.log);
if (cheerios.backup)
if (cheerios.backup) {
char *out_filename;
int out_filename_len;
char *home = getenv("HOME");
/* do not chdir as other threads can still be running */
out_filename_len = snprintf(
NULL, 0,
"%s/.config/bytenuts/outbuf.log",
home
);
out_filename = calloc(1, out_filename_len + 1);
snprintf(
out_filename, out_filename_len + 1,
"%s/.config/bytenuts/outbuf.log",
home
);
/* move this processes log to the path that can be loaded on resumption */
fclose(cheerios.backup);
rename(cheerios.backup_filename, out_filename);
free(out_filename);
free(cheerios.backup_filename);
}
pthread_exit(NULL);
return NULL;
}