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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1992-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
static const char usage[] =
"[-?\n@(#)$Id: mktemp (AT&T Research) 2009-06-19 $\n]"
USAGE_LICENSE
"[+NAME?mktemp - make temporary file or directory]"
"[+DESCRIPTION?\bmktemp\b creates a temporary file with optional base "
"name prefix \aprefix\a. If \aprefix\a is omitted then \btmp_\b is used "
"and \b--tmp\b is implied. If \aprefix\a contains a directory prefix "
"then that directory overrides any of the directories described below. A "
"temporary file will have mode \brw-------\b and a temporary directory "
"will have mode \brwx------\b, subject to \bumask\b(1). Generated paths "
"have these attributes:]"
"{"
"[+*?Lower case to avoid clashes on case ignorant filesystems.]"
"[+*?Pseudo-random part to deter denial of service attacks.]"
"[+*?Pseudo-random part is \a3-chars\a.\a3-chars\a to accomodate "
"8.3 filesystems.]"
"}"
"[+?A consecutive sequence of \bX\b's in \aprefix\a is replaced by the "
"pseudo-random part. If there are no \bX\b's then the pseudo-random part "
"is appended to the prefix.]"
"[d:directory?Create a directory instead of a regular file.]"
"[m:mode]:[mode?Set the mode of the created temporary to \amode\a. "
"\amode\a is symbolic or octal mode as in \bchmod\b(1). Relative modes "
"assume an initial mode of \bu=rwx\b.]"
"[p:default?Use \adirectory\a if the \bTMPDIR\b environment variable is "
"not defined. Implies \b--tmp\b.]:[directory]"
"[q:quiet?Suppress file and directory error diagnostics.]"
"[t:tmp|temporary-directory?Create a path rooted in a temporary "
"directory.]"
"[u:unsafe|dry-run?Check for file/directory existence but do not create. "
"Who would want to do that.]"
"\n"
"\n[ prefix ]\n"
"\n"
"[+SEE ALSO?\bmkdir\b(1), \bpathtemp\b(3), \bmktemp\b(3)]"
;
#include <cmd.h>
#include <ls.h>
int
b_mktemp(int argc, char** argv, void* context)
{
mode_t mode = 0;
mode_t mask;
int fd;
int i;
int quiet = 0;
int unsafe = 0;
int* fdp = &fd;
char* dir = "";
char* pfx;
char* t;
char path[PATH_MAX];
cmdinit(argc, argv, context, ERROR_CATALOG, ERROR_NOTIFY);
for (;;)
{
switch (optget(argv, usage))
{
case 0:
break;
case 'd':
fdp = 0;
continue;
case 'm':
mode = strperm(pfx = opt_info.arg, &opt_info.arg, S_IRWXU);
if (*opt_info.arg)
error(ERROR_exit(0), "%s: invalid mode", pfx);
continue;
case 'p':
if ((t = getenv("TMPDIR")) && *t)
dir = 0;
else
dir = opt_info.arg;
continue;
case 'q':
quiet = 1;
continue;
case 't':
dir = 0;
continue;
case 'u':
unsafe = 1;
fdp = 0;
continue;
case ':':
error(2, "%s", opt_info.arg);
continue;
case '?':
error(ERROR_usage(2), "%s", opt_info.arg);
continue;
}
break;
}
argv += opt_info.index;
if (error_info.errors || (pfx = *argv++) && *argv)
error(ERROR_usage(2), "%s", optusage(NiL));
mask = umask(0);
if (!mode)
mode = (fdp ? (S_IRUSR|S_IWUSR) : S_IRWXU) & ~mask;
umask(~mode & (S_IRWXU|S_IRWXG|S_IRWXO));
if (!pfx)
{
pfx = "tmp_";
if (dir && !*dir)
dir = 0;
}
if (t = strrchr(pfx, '/'))
{
i = ++t - pfx;
dir = fmtbuf(i);
memcpy(dir, pfx, i);
dir[i] = 0;
pfx = t;
}
for (;;)
{
if (!pathtemp(path, sizeof(path), dir, pfx, fdp))
{
if (quiet)
error_info.errors++;
else
error(ERROR_SYSTEM|2, "cannot create temporary path");
break;
}
if (fdp || unsafe || !mkdir(path, mode))
{
if (fdp)
close(*fdp);
sfputr(sfstdout, path, '\n');
break;
}
if (sh_checksig(context))
{
error_info.errors++;
break;
}
}
umask(mask);
return error_info.errors != 0;
}
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