xref: /freebsd/usr.bin/mktemp/mktemp.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 1994, 1995, 1996, 1998 Peter Wemm <peter@netplex.com.au>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  */
27 
28 /*
29  * This program was originally written long ago, originally for a non
30  * BSD-like OS without mkstemp().  It's been modified over the years
31  * to use mkstemp() rather than the original O_CREAT|O_EXCL/fstat/lstat
32  * etc style hacks.
33  * A cleanup, misc options and mkdtemp() calls were added to try and work
34  * more like the OpenBSD version - which was first to publish the interface.
35  */
36 
37 #include <err.h>
38 #include <paths.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 
44 #ifndef lint
45 static const char rcsid[] =
46 	"$FreeBSD$";
47 #endif /* not lint */
48 
49 static void usage(void);
50 
51 int
52 main(int argc, char **argv)
53 {
54 	int c, fd, ret;
55 	char *tmpdir;
56 	const char *prefix;
57 	char *name;
58 	int dflag, qflag, tflag, uflag;
59 
60 	ret = dflag = qflag = tflag = uflag = 0;
61 	prefix = "mktemp";
62 	name = NULL;
63 
64 	while ((c = getopt(argc, argv, "dqt:u")) != -1)
65 		switch (c) {
66 		case 'd':
67 			dflag++;
68 			break;
69 
70 		case 'q':
71 			qflag++;
72 			break;
73 
74 		case 't':
75 			prefix = optarg;
76 			tflag++;
77 			break;
78 
79 		case 'u':
80 			uflag++;
81 			break;
82 
83 		default:
84 			usage();
85 		}
86 
87 	argc -= optind;
88 	argv += optind;
89 
90 	if (tflag) {
91 		tmpdir = getenv("TMPDIR");
92 		if (tmpdir == NULL)
93 			asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
94 		else
95 			asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
96 		/* if this fails, the program is in big trouble already */
97 		if (name == NULL) {
98 			if (qflag)
99 				return (1);
100 			else
101 				errx(1, "cannot generate template");
102 		}
103 	} else if (argc < 1) {
104 		usage();
105 	}
106 
107 	/* generate all requested files */
108 	while (name != NULL || argc > 0) {
109 		if (name == NULL) {
110 			name = strdup(argv[0]);
111 			argv++;
112 			argc--;
113 		}
114 
115 		if (dflag) {
116 			if (mkdtemp(name) == NULL) {
117 				ret = 1;
118 				if (!qflag)
119 					warn("mkdtemp failed on %s", name);
120 			} else {
121 				printf("%s\n", name);
122 				if (uflag)
123 					rmdir(name);
124 			}
125 		} else {
126 			fd = mkstemp(name);
127 			if (fd < 0) {
128 				ret = 1;
129 				if (!qflag)
130 					warn("mkstemp failed on %s", name);
131 			} else {
132 				close(fd);
133 				if (uflag)
134 					unlink(name);
135 				printf("%s\n", name);
136 			}
137 		}
138 		if (name)
139 			free(name);
140 		name = NULL;
141 	}
142 	return (ret);
143 }
144 
145 static void
146 usage()
147 {
148 	fprintf(stderr,
149 		"usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
150 	fprintf(stderr,
151 		"       mktemp [-d] [-q] [-u] -t prefix \n");
152 	exit (1);
153 }
154