diff options
Diffstat (limited to 'src/mkdir.c')
-rw-r--r-- | src/mkdir.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/mkdir.c b/src/mkdir.c new file mode 100644 index 0000000..aa1c4ff --- /dev/null +++ b/src/mkdir.c @@ -0,0 +1,100 @@ +/* mkdir.c -- BSD compatible make directory function for System V + Copyright (C) 1988, 1990 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <sys/types.h> +#include <sys/stat.h> +#include <errno.h> + +#if !HAVE_DECL_ERRNO +extern int errno; +#endif + +#ifdef STAT_MACROS_BROKEN +#undef S_ISDIR +#endif + +#if !defined(S_ISDIR) && defined(S_IFDIR) +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#endif + +#include "safe-stat.h" + +/* mkdir adapted from GNU tar. */ + +/* Make directory DPATH, with permission mode DMODE. + + Written by Robert Rother, Mariah Corporation, August 1985 + (sdcsvax!rmr or rmr@uscd). If you want it, it's yours. + + Severely hacked over by John Gilmore to make a 4.2BSD compatible + subroutine. 11Mar86; hoptoad!gnu + + Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir, + subroutine didn't return EEXIST. It does now. */ + +int +mkdir (dpath, dmode) + char *dpath; + int dmode; +{ + int cpid, status; + struct stat statbuf; + + if (SAFE_STAT (dpath, &statbuf) == 0) + { + errno = EEXIST; /* stat worked, so it already exists. */ + return -1; + } + + /* If stat fails for a reason other than non-existence, return error. */ + if (errno != ENOENT) + return -1; + + cpid = fork (); + switch (cpid) + { + case -1: /* Cannot fork. */ + return -1; /* errno is already set. */ + + case 0: /* Child process. */ + /* Cheap hack to set mode of new directory. Since this child + process is going away anyway, we zap its umask. + This won't suffice to set SUID, SGID, etc. on this + directory, so the parent process calls chmod afterward. */ + status = umask (0); /* Get current umask. */ + umask (status | (0777 & ~dmode)); /* Set for mkdir. */ + execl ("/bin/mkdir", "mkdir", dpath, (char *) 0); + _exit (1); + + default: /* Parent process. */ + /* Wait for kid to finish. */ + while (wait (&status) != cpid) + /* Do nothing. */ ; + + if (status & 0xFFFF) + { + /* /bin/mkdir failed. */ + errno = EIO; + return -1; + } + return chmod (dpath, dmode); + } +} |