projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 7ea2a626 KB |
1 | /*- |
| 2 | * Copyright (c) 1993 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Peter McIlroy. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef lint | |
| 12 | static char sccsid[] = "@(#)tmp.c 5.1 (Berkeley) %G%"; | |
| 13 | #endif /* not lint */ | |
| 14 | ||
| 15 | #include <sys/param.h> | |
| 16 | ||
| 17 | #include <err.h> | |
| 18 | #include <errno.h> | |
| 19 | #include <limits.h> | |
| 20 | #include <signal.h> | |
| 21 | #include <stdio.h> | |
| 22 | #include <stdlib.h> | |
| 23 | #include <string.h> | |
| 24 | #include <unistd.h> | |
| 25 | ||
| 26 | #include "pathnames.h" | |
| 27 | ||
| 28 | #define _NAME_TMP "sort.XXXXXXXX" | |
| 29 | ||
| 30 | FILE * | |
| 31 | ftmp() | |
| 32 | { | |
| 33 | static char *envtmp; | |
| 34 | sigset_t set, oset; | |
| 35 | static int first = 0; | |
| 36 | FILE *fd; | |
| 37 | char pathb[_POSIX_PATH_MAX], *path; | |
| 38 | ||
| 39 | path = pathb; | |
| 40 | if (!first && !envtmp) { | |
| 41 | envtmp = getenv("TMPDIR"); | |
| 42 | first = 1; | |
| 43 | } | |
| 44 | if (envtmp) | |
| 45 | (void)snprintf(path, | |
| 46 | sizeof(pathb), "%s/%s", envtmp, _NAME_TMP); | |
| 47 | else { | |
| 48 | memmove(path, _PATH_SORTTMP, sizeof(_PATH_SORTTMP)); | |
| 49 | } | |
| 50 | sigfillset(&set); | |
| 51 | (void)sigprocmask(SIG_BLOCK, &set, &oset); | |
| 52 | path = mktemp(path); | |
| 53 | if (!path) | |
| 54 | err(2, "%s"); | |
| 55 | if (!(fd = fopen(path, "w+"))) | |
| 56 | err(2, "%s", path); | |
| 57 | (void)unlink(path); | |
| 58 | ||
| 59 | (void)sigprocmask(SIG_SETMASK, &oset, NULL); | |
| 60 | return (fd); | |
| 61 | }; |