NetBSD/usr.sbin/sup/source/cvt.c

57 lines
824 B
C

/*
* Quick hack to convert old binary sup when.collection files into
* the new ascii format.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int
main(argc, argv)
int argc;
char *argv[];
{
long b;
FILE *fp;
int fd;
if (argc != 2) {
(void) fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
return 1;
}
if ((fd = open(argv[1], O_RDWR)) == -1) {
perror("open");
return 1;
}
if (read(fd, &b, sizeof(b)) != sizeof(b)) {
perror("read");
return 1;
}
if (lseek(fd, 0, SEEK_SET) == -1) {
perror("lseek");
return 1;
}
(void) close(fd);
if ((fp = fopen(argv[1], "w")) == NULL) {
perror("fopen");
return 1;
}
if (fprintf(fp, "%ld\n", b) < 0) {
perror("fprintf");
return 1;
}
if (fclose(fp) != 0) {
perror("fclose");
return 1;
}
return 0;
}