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[glibc.git] / sysdeps / unix / mkdir.c
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1 /* Copyright (C) 1992, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <stddef.h>
21 #include <sys/stat.h>
22 #include <sys/types.h>
23 #include <stdlib.h>
24 #include <sys/wait.h>
25 #include <string.h>
27 /* Create a directory named PATH with protections MODE. */
28 int
29 __mkdir (path, mode)
30 const char *path;
31 mode_t mode;
33 char *cmd = __alloca (80 + strlen (path));
34 char *p;
35 int status;
36 mode_t mask;
37 int save;
38 struct stat statbuf;
40 if (path == NULL)
42 __set_errno (EINVAL);
43 return -1;
46 /* Check for some errors. */
47 if (__stat (path, &statbuf) < 0)
49 if (errno != ENOENT)
50 return -1;
51 /* There is no file by that name. Good. */
53 else
55 __set_errno (EEXIST);
56 return -1;
59 /* Race condition, but how else to do it? */
60 mask = __umask (0777);
61 (void) __umask (mask);
63 p = cmd;
64 *p++ = 'm';
65 *p++ = 'k';
66 *p++ = 'd';
67 *p++ = 'i';
68 *p++ = 'r';
69 *p++ = ' ';
71 mode &= ~mask;
72 *p++ = '-';
73 *p++ = 'm';
74 *p++ = ' ';
75 *p++ = ((mode & 07000) >> 9) + '0';
76 *p++ = ((mode & 0700) >> 6) + '0';
77 *p++ = ((mode & 070) >> 3) + '0';
78 *p++ = ((mode & 07)) + '0';
79 *p++ = ' ';
81 strcpy (p, path);
83 save = errno;
84 /* If system doesn't set errno, but the mkdir fails, we really
85 have no idea what went wrong. EIO is the vaguest error I
86 can think of, so I'll use that. */
87 __set_errno (EIO);
88 status = system (cmd);
89 if (WIFEXITED (status) && WEXITSTATUS (status) == 0)
91 __set_errno (save);
92 return 0;
94 else
95 return -1;
98 weak_alias (__mkdir, mkdir)