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Diffstat (limited to 'usr/src/lib/libcmd/common/mktemp.c')
| -rw-r--r-- | usr/src/lib/libcmd/common/mktemp.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/usr/src/lib/libcmd/common/mktemp.c b/usr/src/lib/libcmd/common/mktemp.c new file mode 100644 index 0000000000..2936a56e22 --- /dev/null +++ b/usr/src/lib/libcmd/common/mktemp.c @@ -0,0 +1,164 @@ +/*********************************************************************** +* * +* 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; +} |