diff options
Diffstat (limited to 'gnu/usr.bin/cvs/lib/rename.c')
-rw-r--r-- | gnu/usr.bin/cvs/lib/rename.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/gnu/usr.bin/cvs/lib/rename.c b/gnu/usr.bin/cvs/lib/rename.c new file mode 100644 index 0000000..3e0b481 --- /dev/null +++ b/gnu/usr.bin/cvs/lib/rename.c @@ -0,0 +1,68 @@ +/* rename.c -- BSD compatible 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <errno.h> +#ifndef STDC_HEADERS +extern int errno; +#endif + +/* Rename file FROM to file TO. + Return 0 if successful, -1 if not. */ + +int +rename (from, to) + char *from; + char *to; +{ + struct stat from_stats; + int pid, status; + + if (stat (from, &from_stats) == 0) + { + if (unlink (to) && errno != ENOENT) + return -1; + if ((from_stats.st_mode & S_IFMT) == S_IFDIR) + { + /* Need a setuid root process to link and unlink directories. */ + pid = fork (); + switch (pid) + { + case -1: /* Error. */ + error (1, errno, "cannot fork"); + + case 0: /* Child. */ + execl (MVDIR, "mvdir", from, to, (char *) 0); + error (255, errno, "cannot run `%s'", MVDIR); + + default: /* Parent. */ + while (wait (&status) != pid) + /* Do nothing. */ ; + + errno = 0; /* mvdir printed the system error message. */ + return status != 0 ? -1 : 0; + } + } + else + { + if (link (from, to) == 0 && (unlink (from) == 0 || errno == ENOENT)) + return 0; + } + } + return -1; +} |