mirror of https://github.com/pikami/slstatus.git
86 lines
1.2 KiB
C
86 lines
1.2 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "util.h"
|
|
|
|
char *argv0;
|
|
|
|
static void
|
|
verr(const char *fmt, va_list ap)
|
|
{
|
|
if (argv0 && strncmp(fmt, "usage", sizeof("usage") - 1)) {
|
|
fprintf(stderr, "%s: ", argv0);
|
|
}
|
|
|
|
vfprintf(stderr, fmt, ap);
|
|
|
|
if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
|
|
fputc(' ', stderr);
|
|
perror(NULL);
|
|
} else {
|
|
fputc('\n', stderr);
|
|
}
|
|
}
|
|
|
|
void
|
|
warn(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
die(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
verr(fmt, ap);
|
|
va_end(ap);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
const char *
|
|
bprintf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
int ret;
|
|
|
|
va_start(ap, fmt);
|
|
if ((ret = vsnprintf(buf, sizeof(buf), fmt, ap)) < 0) {
|
|
warn("vsnprintf:");
|
|
} else if ((size_t)ret >= sizeof(buf)) {
|
|
warn("vsnprintf: Output truncated");
|
|
}
|
|
va_end(ap);
|
|
|
|
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':", path);
|
|
return -1;
|
|
}
|
|
va_start(ap, fmt);
|
|
n = vfscanf(fp, fmt, ap);
|
|
va_end(ap);
|
|
fclose(fp);
|
|
|
|
return (n == EOF) ? -1 : n;
|
|
}
|