mirror of
git://git.suckless.org/sbase
synced 2024-12-23 15:34:38 +00:00
b8edf3b4ee
There is still some programs left to be updated for this. Many of these programs would stop on the first file that they could not open.
61 lines
963 B
C
61 lines
963 B
C
/* See LICENSE file for copyright and license details. */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "util.h"
|
|
|
|
static void head(FILE *, const char *, long);
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s [-n] [FILE...]\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
long n = 10;
|
|
FILE *fp;
|
|
|
|
ARGBEGIN {
|
|
case 'n':
|
|
n = estrtol(EARGF(usage()), 0);
|
|
break;
|
|
ARGNUM:
|
|
n = ARGNUMF(0);
|
|
break;
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if(argc == 0) {
|
|
head(stdin, "<stdin>", n);
|
|
} else for(; argc > 0; argc--, argv++) {
|
|
if(!(fp = fopen(argv[0], "r"))) {
|
|
weprintf("fopen %s:", argv[0]);
|
|
continue;
|
|
}
|
|
head(fp, argv[0], n);
|
|
fclose(fp);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
void
|
|
head(FILE *fp, const char *str, long n)
|
|
{
|
|
char buf[BUFSIZ];
|
|
long i = 0;
|
|
|
|
while(i < n && fgets(buf, sizeof buf, fp)) {
|
|
fputs(buf, stdout);
|
|
if(buf[strlen(buf)-1] == '\n')
|
|
i++;
|
|
}
|
|
if(ferror(fp))
|
|
eprintf("%s: read error:", str);
|
|
}
|