diff options
Diffstat (limited to 'winsup/cygwin/mktemp.cc')
| -rw-r--r-- | winsup/cygwin/mktemp.cc | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/winsup/cygwin/mktemp.cc b/winsup/cygwin/mktemp.cc deleted file mode 100644 index 7770c3bff..000000000 --- a/winsup/cygwin/mktemp.cc +++ /dev/null @@ -1,197 +0,0 @@ -/* mktemp.cc: mktemp functions - -This file is adapted for Cygwin from FreeBSD and newlib. - -See the copyright at the bottom of this file. */ - -#include "winsup.h" -#include "cygerrno.h" -#include <fcntl.h> -#include <sys/stat.h> -#include <unistd.h> - -static int _gettemp(char *, int *, int, size_t, int); -static uint32_t arc4random (); - -static const char padchar[] = -"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; - -extern "C" int -mkstemp(char *path) -{ - int fd; - return _gettemp(path, &fd, 0, 0, O_BINARY) ? fd : -1; -} - -extern "C" char * -mkdtemp(char *path) -{ - return _gettemp(path, NULL, 1, 0, 0) ? path : NULL; -} - -extern "C" int -mkstemps(char *path, int len) -{ - int fd; - return _gettemp(path, &fd, 0, len, O_BINARY) ? fd : -1; -} - -extern "C" int -mkostemp(char *path, int flags) -{ - int fd; - return _gettemp(path, &fd, 0, 0, flags & ~O_ACCMODE) ? fd : -1; -} - -extern "C" int -mkostemps(char *path, int len, int flags) -{ - int fd; - return _gettemp(path, &fd, 0, len, flags & ~O_ACCMODE) ? fd : -1; -} - -extern "C" char * -mktemp(char *path) -{ - return _gettemp(path, NULL, 0, 0, 0) ? path : (char *) NULL; -} - -static int -_gettemp(char *path, int *doopen, int domkdir, size_t suffixlen, int flags) -{ - char *start, *trv, *suffp; - char *pad; - - if (doopen && domkdir) - { - set_errno (EINVAL); - return 0; - } - - trv = strchr (path, '\0'); - if ((size_t) (trv - path) < suffixlen) - { - set_errno (EINVAL); - return 0; - } - trv -= suffixlen; - suffp = trv--; - - /* Fill space with random characters */ - while (trv >= path && *trv == 'X') - { - uint32_t rand = arc4random () % (sizeof (padchar) - 1); - *trv-- = padchar[rand]; - } - if (suffp - trv < 6) - { - set_errno (EINVAL); - return 0; - } - start = trv + 1; - - /* - * check the target directory. - */ - struct __stat64 sbuf; - if (doopen != NULL || domkdir) - { - for (; trv > path; trv--) - { - if (*trv == '/') - { - *trv = '\0'; - int rval = stat64 (path, &sbuf); - *trv = '/'; - if (rval != 0) - return 0; - if (!S_ISDIR (sbuf.st_mode)) - { - set_errno (ENOTDIR); - return 0; - } - break; - } - } - } - - for (;;) - { - if (doopen) - { - if ((*doopen = open (path, O_CREAT | O_EXCL | O_RDWR | flags, - S_IRUSR | S_IWUSR)) >= 0) - return 1; - if (errno != EEXIST) - return 0; - } - else if (domkdir) - { - if (mkdir (path, 0700) == 0) - return 1; - if (errno != EEXIST) - return 0; - } - else if (lstat64 (path, &sbuf)) - return errno == ENOENT; - - /* If we have a collision, cycle through the space of filenames */ - for (trv = start;;) - { - if (*trv == '\0' || trv == suffp) - return 0; - pad = strchr (padchar, *trv); - if (pad == NULL || *++pad == '\0') - *trv++ = padchar[0]; - else - { - *trv++ = *pad; - break; - } - } - } - /*NOTREACHED*/ -} - -static uint32_t -arc4random () -{ - union - { - uint32_t rand; - char buf[sizeof (int) / 8]; - } r; - int fd = open ("/dev/urandom", O_RDONLY); - read (fd, r.buf, 4); - close (fd); - return r.rand; -} - -/* -* Copyright (c) 1987, 1993 -* The Regents of the University of California. All rights reserved. -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* 1. Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* 2. Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in the -* documentation and/or other materials provided with the distribution. -* 4. Neither the name of the University nor the names of its contributors -* may be used to endorse or promote products derived from this software -* without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND -* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE -* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -* SUCH DAMAGE. -*/ |