0,0 → 1,217 |
/* Utility to pick a temporary filename prefix. |
Copyright (C) 1996, 1997, 1998, 2001, 2009, 2010 |
Free Software Foundation, Inc. |
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This file is part of the libiberty library. |
Libiberty is free software; you can redistribute it and/or |
modify it under the terms of the GNU Library General Public |
License as published by the Free Software Foundation; either |
version 2 of the License, or (at your option) any later version. |
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Libiberty 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 |
Library General Public License for more details. |
|
You should have received a copy of the GNU Library General Public |
License along with libiberty; see the file COPYING.LIB. If not, |
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
Boston, MA 02110-1301, USA. */ |
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#ifdef HAVE_CONFIG_H |
#include "config.h" |
#endif |
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#include <stdio.h> /* May get P_tmpdir. */ |
#include <sys/types.h> |
#include <errno.h> |
#ifdef HAVE_UNISTD_H |
#include <unistd.h> |
#endif |
#ifdef HAVE_STDLIB_H |
#include <stdlib.h> |
#endif |
#ifdef HAVE_STRING_H |
#include <string.h> |
#endif |
#ifdef HAVE_SYS_FILE_H |
#include <sys/file.h> /* May get R_OK, etc. on some systems. */ |
#endif |
#if defined(_WIN32) && !defined(__CYGWIN__) |
#include <windows.h> |
#endif |
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#ifndef R_OK |
#define R_OK 4 |
#define W_OK 2 |
#define X_OK 1 |
#endif |
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#include "libiberty.h" |
extern int mkstemps (char *, int); |
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/* '/' works just fine on MS-DOS based systems. */ |
#ifndef DIR_SEPARATOR |
#define DIR_SEPARATOR '/' |
#endif |
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/* Name of temporary file. |
mktemp requires 6 trailing X's. */ |
#define TEMP_FILE "ccXXXXXX" |
#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) |
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#if !defined(_WIN32) || defined(__CYGWIN__) |
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/* Subroutine of choose_tmpdir. |
If BASE is non-NULL, return it. |
Otherwise it checks if DIR is a usable directory. |
If success, DIR is returned. |
Otherwise NULL is returned. */ |
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static inline const char *try_dir (const char *, const char *); |
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static inline const char * |
try_dir (const char *dir, const char *base) |
{ |
if (base != 0) |
return base; |
if (dir != 0 |
&& access (dir, R_OK | W_OK | X_OK) == 0) |
return dir; |
return 0; |
} |
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static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
static const char usrtmp[] = |
{ DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
static const char vartmp[] = |
{ DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
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#endif |
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static char *memoized_tmpdir; |
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/* |
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@deftypefn Replacement char* choose_tmpdir () |
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Returns a pointer to a directory path suitable for creating temporary |
files in. |
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@end deftypefn |
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*/ |
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char * |
choose_tmpdir (void) |
{ |
if (!memoized_tmpdir) |
{ |
#if !defined(_WIN32) || defined(__CYGWIN__) |
const char *base = 0; |
char *tmpdir; |
unsigned int len; |
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#ifdef VMS |
/* Try VMS standard temp logical. */ |
base = try_dir ("/sys$scratch", base); |
#else |
base = try_dir (getenv ("TMPDIR"), base); |
base = try_dir (getenv ("TMP"), base); |
base = try_dir (getenv ("TEMP"), base); |
#endif |
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#ifdef P_tmpdir |
/* We really want a directory name here as if concatenated with say \dir |
we do not end up with a double \\ which defines an UNC path. */ |
if (strcmp (P_tmpdir, "\\") == 0) |
base = try_dir ("\\.", base); |
else |
base = try_dir (P_tmpdir, base); |
#endif |
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/* Try /var/tmp, /usr/tmp, then /tmp. */ |
base = try_dir (vartmp, base); |
base = try_dir (usrtmp, base); |
base = try_dir (tmp, base); |
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/* If all else fails, use the current directory! */ |
if (base == 0) |
base = "."; |
/* Append DIR_SEPARATOR to the directory we've chosen |
and return it. */ |
len = strlen (base); |
tmpdir = XNEWVEC (char, len + 2); |
strcpy (tmpdir, base); |
tmpdir[len] = DIR_SEPARATOR; |
tmpdir[len+1] = '\0'; |
memoized_tmpdir = tmpdir; |
#else /* defined(_WIN32) && !defined(__CYGWIN__) */ |
DWORD len; |
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/* Figure out how much space we need. */ |
len = GetTempPath(0, NULL); |
if (len) |
{ |
memoized_tmpdir = XNEWVEC (char, len); |
if (!GetTempPath(len, memoized_tmpdir)) |
{ |
XDELETEVEC (memoized_tmpdir); |
memoized_tmpdir = NULL; |
} |
} |
if (!memoized_tmpdir) |
/* If all else fails, use the current directory. */ |
memoized_tmpdir = xstrdup (".\\"); |
#endif /* defined(_WIN32) && !defined(__CYGWIN__) */ |
} |
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return memoized_tmpdir; |
} |
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/* |
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@deftypefn Replacement char* make_temp_file (const char *@var{suffix}) |
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Return a temporary file name (as a string) or @code{NULL} if unable to |
create one. @var{suffix} is a suffix to append to the file name. The |
string is @code{malloc}ed, and the temporary file has been created. |
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@end deftypefn |
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*/ |
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char * |
make_temp_file (const char *suffix) |
{ |
const char *base = choose_tmpdir (); |
char *temp_filename; |
int base_len, suffix_len; |
int fd; |
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if (suffix == 0) |
suffix = ""; |
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base_len = strlen (base); |
suffix_len = strlen (suffix); |
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temp_filename = XNEWVEC (char, base_len |
+ TEMP_FILE_LEN |
+ suffix_len + 1); |
strcpy (temp_filename, base); |
strcpy (temp_filename + base_len, TEMP_FILE); |
strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix); |
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fd = mkstemps (temp_filename, suffix_len); |
/* Mkstemps failed. It may be EPERM, ENOSPC etc. */ |
if (fd == -1) |
{ |
fprintf (stderr, "Cannot create temporary file in %s: %s\n", |
base, strerror (errno)); |
abort (); |
} |
/* We abort on failed close out of sheer paranoia. */ |
if (close (fd)) |
abort (); |
return temp_filename; |
} |