slstatus/util.c

44 lines
689 B
C

/* See LICENSE file for copyright and license details. */
#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"))) {
fprintf(stderr, "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;
}