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libalpm: clean up lock function

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We were doing a lot of manual work; leverage the standard library a bit to
do more for us.

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2009-10-11 14:15:27 -05:00
parent 6e312220ec
commit 4828d9ef7c
1 changed files with 5 additions and 8 deletions
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13
lib/libalpm/util.c
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@ -200,8 +200,7 @@ char *_alpm_strtrim(char *str)
int _alpm_lckmk()
{
int fd;
pid_t pid;
char *dir, *ptr, *spid = NULL;
char *dir, *ptr;
const char *file = alpm_option_get_lockfile();
/* create the dir of the lockfile first */
@ -216,13 +215,11 @@ int _alpm_lckmk()
while((fd = open(file, O_WRONLY | O_CREAT | O_EXCL, 0000)) == -1
&& errno == EINTR);
if(fd > 0) {
pid = getpid();
size_t len = snprintf(spid, 0, "%ld\n", (long)pid) + 1;
spid = malloc(len);
snprintf(spid, len, "%ld\n", (long)pid);
while(write(fd, (void *)spid, len) == -1 && errno == EINTR);
FILE *f = fdopen(fd, "w");
fprintf(f, "%ld\n", (long)getpid());
fflush(f);
fsync(fd);
free(spid);
fclose(f);
return(fd);
}
return(-1);