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 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 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