1 /* mkrmdir.c -- BSD compatible directory functions for System V
2 Copyright (C) 1988, 1990 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program 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
12 GNU General Public License for more details. */
13
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
17
18 #include <sys/types.h>
19 #include <sys/stat.h>
20 #include <errno.h>
21 #ifndef STDC_HEADERS
22 extern int errno;
23 #endif
24
25 /* mkdir and rmdir adapted from GNU tar. */
26
27 /* Make directory DPATH, with permission mode DMODE.
28
29 Written by Robert Rother, Mariah Corporation, August 1985
30 (sdcsvax!rmr or rmr@uscd). If you want it, it's yours.
31
32 Severely hacked over by John Gilmore to make a 4.2BSD compatible
33 subroutine. 11Mar86; hoptoad!gnu
34
35 Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
36 subroutine didn't return EEXIST. It does now. */
37
38 int
mkdir(dpath,dmode)39 mkdir (dpath, dmode)
40 char *dpath;
41 int dmode;
42 {
43 int cpid, status;
44 struct stat statbuf;
45
46 if (stat (dpath, &statbuf) == 0)
47 {
48 errno = EEXIST; /* stat worked, so it already exists. */
49 return -1;
50 }
51
52 /* If stat fails for a reason other than non-existence, return error. */
53 if (! existence_error (errno))
54 return -1;
55
56 cpid = fork ();
57 switch (cpid)
58 {
59 case -1: /* Cannot fork. */
60 return -1; /* errno is set already. */
61
62 case 0: /* Child process. */
63 /* Cheap hack to set mode of new directory. Since this child
64 process is going away anyway, we zap its umask.
65 This won't suffice to set SUID, SGID, etc. on this
66 directory, so the parent process calls chmod afterward. */
67 status = umask (0); /* Get current umask. */
68 umask (status | (0777 & ~dmode)); /* Set for mkdir. */
69 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
70 _exit (1);
71
72 default: /* Parent process. */
73 while (wait (&status) != cpid) /* Wait for kid to finish. */
74 /* Do nothing. */ ;
75
76 if (status & 0xFFFF)
77 {
78 errno = EIO; /* /bin/mkdir failed. */
79 return -1;
80 }
81 return chmod (dpath, dmode);
82 }
83 }
84
85 /* Remove directory DPATH.
86 Return 0 if successful, -1 if not. */
87
88 int
rmdir(dpath)89 rmdir (dpath)
90 char *dpath;
91 {
92 int cpid, status;
93 struct stat statbuf;
94
95 if (stat (dpath, &statbuf) != 0)
96 return -1; /* stat set errno. */
97
98 if ((statbuf.st_mode & S_IFMT) != S_IFDIR)
99 {
100 errno = ENOTDIR;
101 return -1;
102 }
103
104 cpid = fork ();
105 switch (cpid)
106 {
107 case -1: /* Cannot fork. */
108 return -1; /* errno is set already. */
109
110 case 0: /* Child process. */
111 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
112 _exit (1);
113
114 default: /* Parent process. */
115 while (wait (&status) != cpid) /* Wait for kid to finish. */
116 /* Do nothing. */ ;
117
118 if (status & 0xFFFF)
119 {
120 errno = EIO; /* /bin/rmdir failed. */
121 return -1;
122 }
123 return 0;
124 }
125 }
126