* Copyright 2008, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT License.
*/
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
extern const char *__progname;
int
main(int argc, char **argv)
{
if (argc < 3) {
fprintf(stderr, "usage: %s <file> <size>\n", __progname);
return 1;
}
struct stat st;
if (stat(argv[1], &st) != 0) {
fprintf(stderr, "%s: cannot stat file \"%s\": %s\n", __progname,
argv[1], strerror(errno));
return 1;
}
off_t newSize = strtoll(argv[2], NULL, 0);
printf("size %10Ld\n", st.st_size);
printf("wanted %10Ld\n", newSize);
printf("Do you really want to truncate the file [y/N]? ");
fflush(stdout);
char yes[10];
if (fgets(yes, sizeof(yes), stdin) == NULL || tolower(yes[0]) != 'y')
return 0;
if (truncate(argv[1], newSize) != 0) {
fprintf(stderr, "%s: cannot truncate file \"%s\": %s\n", __progname,
argv[1], strerror(errno));
return 1;
}
return 0;
}
