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Member "cvs-1.11.23/lib/mkdir.c" (7 May 2008, 3227 Bytes) of package /linux/misc/old/cvs-1.11.23.tar.gz:


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    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      const char *dpath;
   41      int dmode;
   42 {
   43   int cpid, status;
   44   struct stat statbuf;
   45 
   46   if (CVS_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 (CVS_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 }