780fd613eb
improvements: - when truncate on a file failed proceed with the rest. - when truncate on a file failed exit with EXIT_FAILURE. Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include "util.h"
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s [-c] -s size file...\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int cflag = 0, sflag = 0;
|
|
int fd, i, ret = EXIT_SUCCESS;
|
|
long size;
|
|
|
|
ARGBEGIN {
|
|
case 's':
|
|
sflag = 1;
|
|
size = estrtol(EARGF(usage()), 10);
|
|
break;
|
|
case 'c':
|
|
cflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if (argc < 1 || !sflag)
|
|
usage();
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
fd = open(argv[i], O_WRONLY | (cflag ? 0 : O_CREAT), 0644);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "open: cannot open `%s' for writing: %s\n",
|
|
argv[i], strerror(errno));
|
|
ret = EXIT_FAILURE;
|
|
continue;
|
|
}
|
|
if (ftruncate(fd, size) < 0) {
|
|
fprintf(stderr, "truncate: cannot open `%s' for writing: %s\n",
|
|
argv[i], strerror(errno));
|
|
ret = EXIT_FAILURE;
|
|
}
|
|
close(fd);
|
|
}
|
|
return ret;
|
|
}
|