slstatus/util.c
2017-09-17 17:45:03 +02:00

43 lines
688 B
C

/* See LICENSE file for copyright and license details. */
#include <err.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
const char *
bprintf(const char *fmt, ...)
{
va_list ap;
size_t len;
va_start(ap, fmt);
len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
va_end(ap);
if (len >= sizeof(buf))
buf[sizeof(buf)-1] = '\0';
return buf;
}
int
pscanf(const char *path, const char *fmt, ...)
{
FILE *fp;
va_list ap;
int n;
if (!(fp = fopen(path, "r"))) {
warn("fopen %s: %s\n", path, strerror(errno));
return -1;
}
va_start(ap, fmt);
n = vfscanf(fp, fmt, ap);
va_end(ap);
fclose(fp);
return (n == EOF) ? -1 : n;
}