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Diffstat (limited to 'newlib/libc/stdio/mktemp.c')
| -rw-r--r-- | newlib/libc/stdio/mktemp.c | 385 |
1 files changed, 0 insertions, 385 deletions
diff --git a/newlib/libc/stdio/mktemp.c b/newlib/libc/stdio/mktemp.c deleted file mode 100644 index ecbc7afea..000000000 --- a/newlib/libc/stdio/mktemp.c +++ /dev/null @@ -1,385 +0,0 @@ -/* - * Copyright (c) 1987 Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that: (1) source distributions retain this entire copyright - * notice and comment, and (2) distributions including binaries display - * the following acknowledgement: ``This product includes software - * developed by the University of California, Berkeley and its contributors'' - * in the documentation or other materials provided with the distribution - * and in all advertising materials mentioning features or use of this - * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ -/* This is file MKTEMP.C */ -/* This file may have been modified by DJ Delorie (Jan 1991). If so, -** these modifications are Copyright (C) 1991 DJ Delorie. -*/ - -/* -FUNCTION -<<mktemp>>, <<mkstemp>>, <<mkostemp>>, <<mkstemps>>, -<<mkostemps>>---generate unused file name -<<mkdtemp>>---generate unused directory - -INDEX - mktemp -INDEX - mkdtemp -INDEX - mkstemp -INDEX - mkstemps -INDEX - mkostemp -INDEX - mkostemps -INDEX - _mktemp_r -INDEX - _mkdtemp_r -INDEX - _mkstemp_r -INDEX - _mkstemps_r -INDEX - _mkostemp_r -INDEX - _mkostemps_r - -ANSI_SYNOPSIS - #include <stdlib.h> - char *mktemp(char *<[path]>); - char *mkdtemp(char *<[path]>); - int mkstemp(char *<[path]>); - int mkstemps(char *<[path]>, int <[suffixlen]>); - int mkostemp(char *<[path]>, int <[flags]>); - int mkostemps(char *<[path]>, int <[suffixlen]>, int <[flags]>); - - char *_mktemp_r(struct _reent *<[reent]>, char *<[path]>); - char *_mkdtemp_r(struct _reent *<[reent]>, char *<[path]>); - int *_mkstemp_r(struct _reent *<[reent]>, char *<[path]>); - int *_mkstemps_r(struct _reent *<[reent]>, char *<[path]>, int <[len]>); - int *_mkostemp_r(struct _reent *<[reent]>, char *<[path]>, - int <[flags]>); - int *_mkostemps_r(struct _reent *<[reent]>, char *<[path]>, int <[len]>, - int <[flags]>); - -DESCRIPTION -<<mktemp>>, <<mkstemp>>, and <<mkstemps>> attempt to generate a file name -that is not yet in use for any existing file. <<mkstemp>> and <<mkstemps>> -create the file and open it for reading and writing; <<mktemp>> simply -generates the file name (making <<mktemp>> a security risk). <<mkostemp>> -and <<mkostemps>> allow the addition of other <<open>> flags, such -as <<O_CLOEXEC>>, <<O_APPEND>>, or <<O_SYNC>>. On platforms with a -separate text mode, <<mkstemp>> forces <<O_BINARY>>, while <<mkostemp>> -allows the choice between <<O_BINARY>>, <<O_TEXT>>, or 0 for default. -<<mkdtemp>> attempts to create a directory instead of a file, with a -permissions mask of 0700. - -You supply a simple pattern for the generated file name, as the string -at <[path]>. The pattern should be a valid filename (including path -information if you wish) ending with at least six `<<X>>' -characters. The generated filename will match the leading part of the -name you supply, with the trailing `<<X>>' characters replaced by some -combination of digits and letters. With <<mkstemps>>, the `<<X>>' -characters end <[suffixlen]> bytes before the end of the string. - -The alternate functions <<_mktemp_r>>, <<_mkdtemp_r>>, <<_mkstemp_r>>, -<<_mkostemp_r>>, <<_mkostemps_r>>, and <<_mkstemps_r>> are reentrant -versions. The extra argument <[reent]> is a pointer to a reentrancy -structure. - -RETURNS -<<mktemp>> returns the pointer <[path]> to the modified string -representing an unused filename, unless it could not generate one, or -the pattern you provided is not suitable for a filename; in that case, -it returns <<NULL>>. Be aware that there is an inherent race between -generating the name and attempting to create a file by that name; -you are advised to use <<O_EXCL|O_CREAT>>. - -<<mkdtemp>> returns the pointer <[path]> to the modified string if the -directory was created, otherwise it returns <<NULL>>. - -<<mkstemp>>, <<mkstemps>>, <<mkostemp>>, and <<mkostemps>> return a file -descriptor to the newly created file, unless it could not generate an -unused filename, or the pattern you provided is not suitable for a -filename; in that case, it returns <<-1>>. - -NOTES -Never use <<mktemp>>. The generated filenames are easy to guess and -there's a race between the test if the file exists and the creation -of the file. In combination this makes <<mktemp>> prone to attacks -and using it is a security risk. Whenever possible use <<mkstemp>> -instead. It doesn't suffer the race condition. - -PORTABILITY -ANSI C does not require either <<mktemp>> or <<mkstemp>>; the System -V Interface Definition requires <<mktemp>> as of Issue 2. POSIX 2001 -requires <<mkstemp>>, and POSIX 2008 requires <<mkdtemp>> while -deprecating <<mktemp>>. <<mkstemps>>, <<mkostemp>>, and <<mkostemps>> -are not standardized. - -Supporting OS subroutines required: <<getpid>>, <<mkdir>>, <<open>>, <<stat>>. -*/ - -#include <_ansi.h> -#include <stdlib.h> -#include <reent.h> -#include <sys/types.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <errno.h> -#include <stdio.h> -#include <ctype.h> - -static int -_DEFUN(_gettemp, (ptr, path, doopen, domkdir, suffixlen, flags), - struct _reent *ptr _AND - char *path _AND - register int *doopen _AND - int domkdir _AND - size_t suffixlen _AND - int flags) -{ - register char *start, *trv; - char *end; -#ifdef __USE_INTERNAL_STAT64 - struct stat64 sbuf; -#else - struct stat sbuf; -#endif - unsigned int pid; - - pid = _getpid_r (ptr); - for (trv = path; *trv; ++trv) /* extra X's get set to 0's */ - continue; - if (trv - path < suffixlen) - { - ptr->_errno = EINVAL; - return 0; - } - trv -= suffixlen; - end = trv; - while (path < trv && *--trv == 'X') - { - *trv = (pid % 10) + '0'; - pid /= 10; - } - if (end - trv < 6) - { - ptr->_errno = EINVAL; - return 0; - } - - /* - * Check the target directory; if you have six X's and it - * doesn't exist this runs for a *very* long time. - */ - - for (start = trv + 1;; --trv) - { - if (trv <= path) - break; - if (*trv == '/') - { - *trv = '\0'; -#ifdef __USE_INTERNAL_STAT64 - if (_stat64_r (ptr, path, &sbuf)) -#else - if (_stat_r (ptr, path, &sbuf)) -#endif - return (0); - if (!(sbuf.st_mode & S_IFDIR)) - { - ptr->_errno = ENOTDIR; - return (0); - } - *trv = '/'; - break; - } - } - - for (;;) - { -#if !defined _ELIX_LEVEL || _ELIX_LEVEL >= 4 - if (domkdir) - { -#ifdef HAVE_MKDIR - if (_mkdir_r (ptr, path, 0700) == 0) - return 1; - if (ptr->_errno != EEXIST) - return 0; -#else /* !HAVE_MKDIR */ - ptr->_errno = ENOSYS; - return 0; -#endif /* !HAVE_MKDIR */ - } - else -#endif /* _ELIX_LEVEL */ - if (doopen) - { - if ((*doopen = _open_r (ptr, path, O_CREAT | O_EXCL | O_RDWR | flags, - 0600)) >= 0) - return 1; - if (ptr->_errno != EEXIST) - return 0; - } -#ifdef __USE_INTERNAL_STAT64 - else if (_stat64_r (ptr, path, &sbuf)) -#else - else if (_stat_r (ptr, path, &sbuf)) -#endif - return (ptr->_errno == ENOENT ? 1 : 0); - - /* tricky little algorithm for backward compatibility */ - for (trv = start;;) - { - if (trv == end) - return 0; - if (*trv == 'z') - *trv++ = 'a'; - else - { - /* Safe, since it only encounters 7-bit characters. */ - if (isdigit ((unsigned char) *trv)) - *trv = 'a'; - else - ++ * trv; - break; - } - } - } - /*NOTREACHED*/ -} - -#ifndef O_BINARY -# define O_BINARY 0 -#endif - -int -_DEFUN(_mkstemp_r, (ptr, path), - struct _reent *ptr _AND - char *path) -{ - int fd; - - return (_gettemp (ptr, path, &fd, 0, 0, O_BINARY) ? fd : -1); -} - -#if !defined _ELIX_LEVEL || _ELIX_LEVEL >= 4 -char * -_DEFUN(_mkdtemp_r, (ptr, path), - struct _reent *ptr _AND - char *path) -{ - return (_gettemp (ptr, path, (int *) NULL, 1, 0, 0) ? path : NULL); -} - -int -_DEFUN(_mkstemps_r, (ptr, path, len), - struct _reent *ptr _AND - char *path _AND - int len) -{ - int fd; - - return (_gettemp (ptr, path, &fd, 0, len, O_BINARY) ? fd : -1); -} - -int -_DEFUN(_mkostemp_r, (ptr, path, flags), - struct _reent *ptr _AND - char *path _AND - int flags) -{ - int fd; - - return (_gettemp (ptr, path, &fd, 0, 0, flags & ~O_ACCMODE) ? fd : -1); -} - -int -_DEFUN(_mkostemps_r, (ptr, path, len, flags), - struct _reent *ptr _AND - char *path _AND - int len _AND - int flags) -{ - int fd; - - return (_gettemp (ptr, path, &fd, 0, len, flags & ~O_ACCMODE) ? fd : -1); -} -#endif /* _ELIX_LEVEL */ - -char * -_DEFUN(_mktemp_r, (ptr, path), - struct _reent *ptr _AND - char *path) -{ - return (_gettemp (ptr, path, (int *) NULL, 0, 0, 0) ? path : (char *) NULL); -} - -#ifndef _REENT_ONLY - -int -_DEFUN(mkstemp, (path), - char *path) -{ - int fd; - - return (_gettemp (_REENT, path, &fd, 0, 0, O_BINARY) ? fd : -1); -} - -# if !defined _ELIX_LEVEL || _ELIX_LEVEL >= 4 -char * -_DEFUN(mkdtemp, (path), - char *path) -{ - return (_gettemp (_REENT, path, (int *) NULL, 1, 0, 0) ? path : NULL); -} - -int -_DEFUN(mkstemps, (path, len), - char *path _AND - int len) -{ - int fd; - - return (_gettemp (_REENT, path, &fd, 0, len, O_BINARY) ? fd : -1); -} - -int -_DEFUN(mkostemp, (path, flags), - char *path _AND - int flags) -{ - int fd; - - return (_gettemp (_REENT, path, &fd, 0, 0, flags & ~O_ACCMODE) ? fd : -1); -} - -int -_DEFUN(mkostemps, (path, len, flags), - char *path _AND - int len _AND - int flags) -{ - int fd; - - return (_gettemp (_REENT, path, &fd, 0, len, flags & ~O_ACCMODE) ? fd : -1); -} -# endif /* _ELIX_LEVEL */ - -char * -_DEFUN(mktemp, (path), - char *path) -{ - return (_gettemp (_REENT, path, (int *) NULL, 0, 0, 0) ? path : (char *) NULL); -} - -#endif /* ! defined (_REENT_ONLY) */ |