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 	if (fd != -1)
38 		unlink(name);
39 	return fd;
40 }
41 
42 FILE *
43 got_opentemp(void)
44 {
45 	int fd;
46 	FILE *f;
47 
48 	fd = got_opentempfd();
49 	if (fd < 0)
50 		return NULL;
51 
52 	f = fdopen(fd, "w+");
53 	if (f == NULL) {
54 		close(fd);
55 		return NULL;
56 	}
57 
58 	return f;
59 }
60 
61 const struct got_error *
62 got_opentemp_named(char **path, FILE **outfile, const char *basepath)
63 {
64 	const struct got_error *err = NULL;
65 	int fd;
66 
67 	*outfile = NULL;
68 
69 	if (asprintf(path, "%s-XXXXXX", basepath) == -1) {
70 		*path = NULL;
71 		return got_error_from_errno("asprintf");
72 	}
73 
74 	fd = mkstemp(*path);
75 	if (fd == -1) {
76 		err = got_error_from_errno2("mkstemp", *path);
77 		free(*path);
78 		*path = NULL;
79 		return err;
80 	}
81 
82 	*outfile = fdopen(fd, "w+");
83 	if (*outfile == NULL) {
84 		err = got_error_from_errno2("fdopen", *path);
85 		free(*path);
86 		*path = NULL;
87 	}
88 
89 	return err;
90 }
91 
92 const struct got_error *
93 got_opentemp_named_fd(char **path, int *outfd, const char *basepath)
94 {
95 	const struct got_error *err = NULL;
96 	int fd;
97 
98 	*outfd = -1;
99 
100 	if (asprintf(path, "%s-XXXXXX", basepath) == -1) {
101 		*path = NULL;
102 		return got_error_from_errno("asprintf");
103 	}
104 
105 	fd = mkstemp(*path);
106 	if (fd == -1) {
107 		err = got_error_from_errno("mkstemp");
108 		free(*path);
109 		*path = NULL;
110 		return err;
111 	}
112 
113 	*outfd = fd;
114 	return err;
115 }