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#include "config.h"
#include "lock.h"
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
static const char *LF_PATH = __LOCK_FILE_PATH;
static size_t LF_PATH_LEN = sizeof(__LOCK_FILE_PATH);
static int check_dir = 1;
static int fd = 0;
void lock_acquire() {
const char* path;
struct flock f = {
.l_type=F_WRLCK,
.l_whence=SEEK_SET,
.l_start=0,
.l_len=0
};
int ret;
if (check_dir) {
// TODO check & create dir
}
path = LF_PATH;
fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC, 0600);
if (fd == -1) {
// TODO error handling
return;
}
ret = fcntl(fd, F_SETLKW, f);
if (ret == -1) {
// TODO error handling
return;
}
}
void lock_release() {
struct flock f = {
.l_type=F_UNLCK,
.l_whence=SEEK_SET,
.l_start=0,
.l_len=0
};
int ret;
if (fd == 0) {
return;
}
ret = fcntl(fd, F_SETLKW, f);
if (ret == -1) {
// TODO error handling
return;
}
close(fd);
fd = 0;
}
void lock_override(const char *path, size_t len) {
LF_PATH = path;
LF_PATH_LEN = len;
check_dir = 0;
}
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