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
86
87
88
89
|
/*********************************************************************
* bfs *
* Copyright (C) 2016 Tavian Barnes <tavianator@tavianator.com> *
* *
* This program is free software. It comes without any warranty, to *
* the extent permitted by applicable law. You can redistribute it *
* and/or modify it under the terms of the Do What The Fuck You Want *
* To Public License, Version 2, as published by Sam Hocevar. See *
* the COPYING file or http://www.wtfpl.net/ for more details. *
*********************************************************************/
#include "util.h"
#include <errno.h>
#include <fcntl.h>
#include <regex.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int xreaddir(DIR *dir, struct dirent **de) {
errno = 0;
*de = readdir(dir);
if (!*de && errno != 0) {
return -1;
} else {
return 0;
}
}
bool isopen(int fd) {
return fcntl(fd, F_GETFD) >= 0 || errno != EBADF;
}
int redirect(int fd, const char *path, int flags, ...) {
close(fd);
mode_t mode = 0;
if (flags & O_CREAT) {
va_list args;
va_start(args, flags);
// Use int rather than mode_t, because va_arg must receive a
// fully-promoted type
mode = va_arg(args, int);
va_end(args);
}
int ret = open(path, flags, mode);
if (ret >= 0 && ret != fd) {
int other = ret;
ret = dup2(other, fd);
if (close(other) != 0) {
ret = -1;
}
}
return ret;
}
int dup_cloexec(int fd) {
#ifdef F_DUPFD_CLOEXEC
return fcntl(fd, F_DUPFD_CLOEXEC, 0);
#else
int ret = dup(fd);
if (ret < 0) {
return -1;
}
if (fcntl(ret, F_SETFD, FD_CLOEXEC) == -1) {
close(ret);
return -1;
}
return ret;
#endif
}
char *xregerror(int err, const regex_t *regex) {
size_t len = regerror(err, regex, NULL, 0);
char *str = malloc(len);
if (str) {
regerror(err, regex, str, len);
}
return str;
}
|