sbase/mktemp.c

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C
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/* See LICENSE file for copyright and license details. */
#include <libgen.h>
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#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
static void
usage(void)
{
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eprintf("usage: %s [-dq] [template]\n", argv0);
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}
static int dflag = 0;
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static int qflag = 0;
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int
main(int argc, char *argv[])
{
char *template = "tmp.XXXXXXXXXX";
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char *tmpdir = "/tmp", *p;
char path[PATH_MAX], tmp[PATH_MAX];
int fd;
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ARGBEGIN {
case 'd':
dflag = 1;
break;
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case 'q':
qflag = 1;
break;
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default:
usage();
} ARGEND;
if (argc > 1)
usage();
else if (argc == 1)
template = argv[0];
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if ((p = getenv("TMPDIR")))
tmpdir = p;
if (strlcpy(tmp, template, sizeof(tmp)) >= sizeof(tmp))
eprintf("path too long\n");
p = dirname(tmp);
if (p[0] != '.') {
if (strlcpy(path, template, sizeof(path)) >= sizeof(path))
eprintf("path too long\n");
} else {
if (strlcpy(path, tmpdir, sizeof(path)) >= sizeof(path))
eprintf("path too long\n");
if (strlcat(path, "/", sizeof(path)) >= sizeof(path))
eprintf("path too long\n");
if (strlcat(path, template, sizeof(path)) >= sizeof(path))
eprintf("path too long\n");
}
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if (dflag) {
if (!mkdtemp(path)) {
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if (!qflag)
eprintf("mkdtemp %s:", path);
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exit(1);
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}
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} else {
if ((fd = mkstemp(path)) < 0) {
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if (!qflag)
eprintf("mkstemp %s:", path);
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exit(1);
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}
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close(fd);
}
puts(path);
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return 0;
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}