JehanneOS/newlib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Add mkdtemp, mkstemps.

Browse Source 
* libc/stdio/mktemp.c: Fix documentation.
(_gettemp): Add domkdir and length parameters.  Check for
insufficient 'X' suffix.  Drop cygwin-specific code.
(_mkstemp_r, _mktemp_r, mkstemp, mktemp): Adjust clients.
(_mkdtemp_r, _mkstemps_r, mkdtemp, mkstemps): New functions.
* libc/include/stdlib.h (_mkdtemp_r, _mkstemps_r, mkdtemp)
(mkstemps): Declare them.
This commit is contained in:
Eric Blake
2009-07-03 12:03:25 +00:00
parent ce1eb6bba0
commit c52ac05c3a
3 changed files with 126 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
newlib/ChangeLog
View File

@@ -1,5 +1,14 @@
2009-07-03 Eric Blake <ebb9@byu.net>
Add mkdtemp, mkstemps.
* libc/stdio/mktemp.c: Fix documentation.
(_gettemp): Add domkdir and length parameters. Check for
insufficient 'X' suffix. Drop cygwin-specific code.
(_mkstemp_r, _mktemp_r, mkstemp, mktemp): Adjust clients.
(_mkdtemp_r, _mkstemps_r, mkdtemp, mkstemps): New functions.
* libc/include/stdlib.h (_mkdtemp_r, _mkstemps_r, mkdtemp)
(mkstemps): Declare them.
Add fpurge.
* libc/stdio/fpurge.c (fpurge, _fpurge_r): New file.
* libc/stdio/Makefile.am (ELIX_4_SOURCES, CHEWOUT_FILES, fpurge):

8
newlib/libc/include/stdlib.h
View File

@@ -98,10 +98,14 @@ size_t _EXFUN(wcstombs,(char *, const wchar_t *, size_t));
size_t _EXFUN(_wcstombs_r,(struct _reent *, char *, const wchar_t *, size_t, _mbstate_t *));
#ifndef __STRICT_ANSI__
#ifndef _REENT_ONLY
int _EXFUN(mkstemp,(char *));
char * _EXFUN(mktemp,(char *) _ATTRIBUTE ((warning ("the use of `mktemp' is dangerous; use `mkstemp' instead"))));
char * _EXFUN(mkdtemp,(char *));
int _EXFUN(mkstemp,(char *));
int _EXFUN(mkstemps,(char *, int));
char * _EXFUN(mktemp,(char *) _ATTRIBUTE ((warning ("the use of `mktemp' is dangerous; use `mkstemp' instead"))));
#endif
char * _EXFUN(_mkdtemp_r, (struct _reent *, char *));
int _EXFUN(_mkstemp_r, (struct _reent *, char *));
int _EXFUN(_mkstemps_r, (struct _reent *, char *, int));
char * _EXFUN(_mktemp_r, (struct _reent *, char *) _ATTRIBUTE ((warning ("the use of `mktemp' is dangerous; use `mkstemp' instead"))));
#endif
_VOID _EXFUN(qsort,(_PTR __base, size_t __nmemb, size_t __size, int(*_compar)(const _PTR, const _PTR)));

138
newlib/libc/stdio/mktemp.c
View File

@@ -23,27 +23,40 @@
/*
FUNCTION
<<mktemp>>, <<mkstemp>>---generate unused file name
<<mktemp>>, <<mkstemp>>, <<mkstemps>>---generate unused file name
<<mkdtemp>>---generate unused directory
INDEX
mktemp
INDEX
mkdtemp
INDEX
mkstemp
INDEX
mkstemps
INDEX
_mktemp_r
INDEX
_mkdtemp_r
INDEX
_mkstemp_r
INDEX
_mkstemps_r
ANSI_SYNOPSIS
#include <stdio.h>
#include <stdlib.h>
char *mktemp(char *<[path]>);
char *mkdtemp(char *<[path]>);
int mkstemp(char *<[path]>);
int mkstemps(char *<[path]>, int <[suffixlen]>);
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]>);
TRAD_SYNOPSIS
#include <stdio.h>
#include <stdlib.h>
char *mktemp(<[path]>)
char *<[path]>;
@@ -59,20 +72,24 @@ TRAD_SYNOPSIS
char *<[path]>;
DESCRIPTION
<<mktemp>> and <<mkstemp>> attempt to generate a file name that is not
yet in use for any existing file. <<mkstemp>> creates the file and
opens it for reading and writing; <<mktemp>> simply generates the file name.
<<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). <<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 some number of `<<X>>'
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.
combination of digits and letters. With <<mkstemps>>, the `<<X>>'
characters end <[suffixlen]> bytes before the end of the string.
The alternate functions <<_mktemp_r>> and <<_mkstemp_r>> are reentrant
versions. The extra argument <[reent]> is a pointer to a reentrancy
structure.
The alternate functions <<_mktemp_r>>, <<_mkdtemp_r>>, <<_mkstemp_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
@@ -80,8 +97,11 @@ 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>>.
<<mkstemp>> returns a file descriptor to the newly created file,
unless it could not generate an unused filename, or the pattern you
<<mkdtemp>> returns the pointer <[path]> to the modified string if the
directory was created, otherwise it returns <<NULL>>.
<<mkstemp>> and <<mkstemps>> 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>>.
@@ -94,9 +114,11 @@ 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.
V Interface Definition requires <<mktemp>> as of Issue 2. POSIX 2001
requires <<mkstemp>>, and POSIX 2008 requires <<mkdtemp>>, but
<<mkstemps>> is not standardized.
Supporting OS subroutines required: <<getpid>>, <<open>>, <<stat>>.
Supporting OS subroutines required: <<getpid>>, <<mkdir>>, <<open>>, <<stat>>.
*/
#include <_ansi.h>
@@ -109,12 +131,15 @@ Supporting OS subroutines required: <<getpid>>, <<open>>, <<stat>>.
#include <ctype.h>
static int
_DEFUN(_gettemp, (ptr, path, doopen),
_DEFUN(_gettemp, (ptr, path, doopen, domkdir, suffixlen),
struct _reent *ptr _AND
char *path _AND
register int *doopen)
register int *doopen _AND
int domkdir _AND
size_t suffixlen)
{
register char *start, *trv;
char *end;
#ifdef __USE_INTERNAL_STAT64
struct stat64 sbuf;
#else
@@ -125,11 +150,23 @@ _DEFUN(_gettemp, (ptr, path, doopen),
pid = _getpid_r (ptr);
for (trv = path; *trv; ++trv) /* extra X's get set to 0's */
continue;
while (*--trv == 'X')
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
@@ -161,16 +198,22 @@ _DEFUN(_gettemp, (ptr, path, doopen),
for (;;)
{
#if !defined _ELIX_LEVEL || _ELIX_LEVEL >= 4
if (domkdir)
{
if (_mkdir_r (ptr, path, 0700) == 0)
return 1;
if (ptr->_errno != EEXIST)
return 0;
}
else
#endif /* _ELIX_LEVEL */
if (doopen)
{
if ((*doopen = _open_r (ptr, path, O_CREAT | O_EXCL | O_RDWR, 0600))
>= 0)
return 1;
#if defined(__CYGWIN__)
if (ptr->_errno != EEXIST && ptr->_errno != EACCES)
#else
if (ptr->_errno != EEXIST)
#endif
return 0;
}
#ifdef __USE_INTERNAL_STAT64
@@ -183,12 +226,13 @@ _DEFUN(_gettemp, (ptr, path, doopen),
/* tricky little algorithm for backward compatibility */
for (trv = start;;)
{
if (!*trv)
if (trv == end)
return 0;
if (*trv == 'z')
*trv++ = 'a';
else
{
/* Safe, since it only encounters 7-bit characters. */
if (isdigit (*trv))
*trv = 'a';
else
@@ -207,15 +251,36 @@ _DEFUN(_mkstemp_r, (ptr, path),
{
int fd;
return (_gettemp (ptr, path, &fd) ? fd : -1);
return (_gettemp (ptr, path, &fd, 0, 0) ? 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) ? 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) ? fd : -1);
}
#endif /* _ELIX_LEVEL */
char *
_DEFUN(_mktemp_r, (ptr, path),
struct _reent *ptr _AND
char *path)
{
return (_gettemp (ptr, path, (int *) NULL) ? path : (char *) NULL);
return (_gettemp (ptr, path, (int *) NULL, 0, 0) ? path : (char *) NULL);
}
#ifndef _REENT_ONLY
@@ -226,14 +291,33 @@ _DEFUN(mkstemp, (path),
{
int fd;
return (_gettemp (_REENT, path, &fd) ? fd : -1);
return (_gettemp (_REENT, path, &fd, 0, 0) ? fd : -1);
}
# if !defined _ELIX_LEVEL || _ELIX_LEVEL >= 4
char *
_DEFUN(mkdemp, (path),
char *path)
{
return (_gettemp (_REENT, path, (int *) NULL, 1, 0) ? path : NULL);
}
int
_DEFUN(mkstemps, (path, len),
char *path _AND
int len)
{
int fd;
return (_gettemp (_REENT, path, &fd, 0, len) ? fd : -1);
}
# endif /* _ELIX_LEVEL */
char *
_DEFUN(mktemp, (path),
char *path)
{
return (_gettemp (_REENT, path, (int *) NULL) ? path : (char *) NULL);
return (_gettemp (_REENT, path, (int *) NULL, 0, 0) ? path : (char *) NULL);
}
#endif /* ! defined (_REENT_ONLY) */