1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <limits.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 #include <string.h>
21 #include <stdio.h>
22 
23 #include "got_opentemp.h"
24 #include "got_error.h"
25 
26 int
27 got_opentempfd(void)
28 {
29 	char name[PATH_MAX];
30 	int fd;
31 
32 	if (strlcpy(name, GOT_TMPDIR_STR "/got.XXXXXXXX", sizeof(name))
33 	    >= sizeof(name))
34 		return -1;
35 
36 	fd = mkstemp(name);
37 	unlink(name);
38 	return fd;
39 }
40 
41 FILE *
42 got_opentemp(void)
43 {
44 	int fd;
45 	FILE *f;
46 
47 	fd = got_opentempfd();
48 	if (fd < 0)
49 		return NULL;
50 
51 	f = fdopen(fd, "w+");
52 	if (f == NULL) {
53 		close(fd);
54 		return NULL;
55 	}
56 
57 	return f;
58 }
59 
60 const struct got_error *
61 got_opentemp_named(char **path, FILE **outfile, const char *basepath)
62 {
63 	const struct got_error *err = NULL;
64 	int fd;
65 
66 	*outfile = NULL;
67 
68 	if (asprintf(path, "%s-XXXXXX", basepath) == -1) {
69 		*path = NULL;
70 		return got_error_from_errno("asprintf");
71 	}
72 
73 	fd = mkstemp(*path);
74 	if (fd == -1) {
75 		err = got_error_from_errno2("mkstemp", *path);
76 		free(*path);
77 		*path = NULL;
78 		return err;
79 	}
80 
81 	*outfile = fdopen(fd, "w+");
82 	if (*outfile == NULL) {
83 		err = got_error_from_errno2("fdopen", *path);
84 		free(*path);
85 		*path = NULL;
86 	}
87 
88 	return err;
89 }
90 
91 const struct got_error *
92 got_opentemp_named_fd(char **path, int *outfd, const char *basepath)
93 {
94 	const struct got_error *err = NULL;
95 	int fd;
96 
97 	*outfd = -1;
98 
99 	if (asprintf(path, "%s-XXXXXX", basepath) == -1) {
100 		*path = NULL;
101 		return got_error_from_errno("asprintf");
102 	}
103 
104 	fd = mkstemp(*path);
105 	if (fd == -1) {
106 		err = got_error_from_errno("mkstemp");
107 		free(*path);
108 		*path = NULL;
109 		return err;
110 	}
111 
112 	*outfd = fd;
113 	return err;
114 }