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 <stdio.h>
21 #include <string.h>
22 
23 #include "got_path_priv.h"
24 
25 int
26 got_path_is_absolute(const char *path)
27 {
28 	return path[0] == '/';
29 }
30 
31 char *
32 got_path_get_absolute(const char *relpath) 
33 {
34 	char cwd[PATH_MAX];
35 	char *abspath;
36 
37 	if (getcwd(cwd, sizeof(cwd)) == NULL)
38 		return NULL;
39 
40 	if (asprintf(&abspath, "%s/%s/", cwd, relpath) == -1)
41 		return NULL;
42 
43 	return abspath;
44 }
45 
46 char *
47 got_path_normalize(const char *path)
48 {
49 	char *resolved;
50 
51 	resolved = realpath(path, NULL);
52 	if (resolved == NULL)
53 		return NULL;
54 	
55 	if (!got_path_is_absolute(resolved)) {
56 		char *abspath = got_path_get_absolute(resolved);
57 		free(resolved);
58 		resolved = abspath;
59 	}
60 
61 	return resolved;
62 }
63 
64 FILE *
65 got_opentemp(void)
66 {
67 	char name[PATH_MAX];
68 	int fd;
69 	FILE *f;
70 
71 	if (strlcpy(name, "/tmp/got.XXXXXXXX", sizeof(name)) >= sizeof(name))
72 		return NULL;
73 
74 	fd = mkstemp(name);
75 	if (fd < 0)
76 		return NULL;
77 
78 	unlink(name);
79 	f = fdopen(fd, "w+");
80 	if (f == NULL) {
81 		close(fd);
82 		return NULL;
83 	}
84 
85 	return f;
86 }