1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/* 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;
}
|
