0c1992fbcc
Include/ctype.h: Function declaration and Macro definition of isDirSep
Include/unistd.h: Declarations added from EfiSysCall.h
Include/utime.h: New file. For the Posix utime() function.
Include/sys/_ctype.h: Update character class bit maps.
Include/sys/EfiSysCall.h: Move declarations to unistd.h
Include/sys/fcntl.h: Improve comments. Add UEFI-specific macros.
Include/sys/filio.h: Remove declarations for unsupported file ioctls.
Include/sys/stat.h: Fix flags. Add macros and declarations.
Include/sys/time.h: Add declarations for new functions Tm2Efi() and Time2Efi().
Include/sys/types.h: Use EFI-specific instead of BSD-specific definitions for typedefs.
Include/sys/unistd.h: Delete inappropriate content. Guard macro definitions.
LibC/Locale/setlocale.c
LibC/Stdio/{fdopen.c, findfp.c, fopen.c, freopen.c, gettemp.c, makebuf.c, mktemp.c,
remove.c, stdio.c, tempnam.c, tmpfile.c, tmpnam.c}
LibC/Time/{itimer.c, ZoneProc.c}
LibC/Uefi/SysCalls.c
LibC/Uefi/Devices/Console/daConsole.c
LibC/Uefi/Devices/UefiShell/daShell.c
PosixLib/Gen/readdir.c
Include unistd.h instead of EfiSysCall.h
LibC/Ctype/CClass.c: Character classification function implementation for isDirSep.
LibC/Ctype/iCtype.c: Update character classification and case conversion tables.
LibC/Time/TimeEfi.c: Improve comments. Implement new functions Tm2Efi() and Time2Efi().
LibC/Uefi/StubFunctions.c: Add missing include. Cosmetic changes to declarations.
LibC/Uefi/SysCalls.c: Add support function for utime().
LibC/Uefi/Uefi.inf: Add LibGen library class dependency.
LibC/Uefi/Xform.c: Enhance Omode2EFI().
LibC/Uefi/Devices/UefiShell/daShell.c: Enhance da_ShellMkdir. Implement da_ShellIoctl to set file times.
PosixLib/Gen/access.c: New file. Implement the access() function.
PosixLib/Gen/dirname.c: Enhance to use isDirSep and differentiate between the device, path, and filename components of UEFI Shell-style paths.
PosixLib/Gen/utime.c: New file. Implement the utime() function.
PosixLib/Gen/LibGen.inf: Change MODULE_TYPE. Add new files.
Signed-off-by: darylm503
Reviewed-by: geekboy15a
Reviewed-by: jljusten
Reviewed-by: Rahul Khana
Reviewed-by: leegrosenbaum
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12800 6f19259b-4bc3-4df7-8a09-765794883524
119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/** @file
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Implementation of the Posix access() function.
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <LibConfig.h>
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#include <sys/EfiCdefs.h>
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#include <ctype.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/syslimits.h>
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/** Save some typing later on. */
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#define GOOD_MODE (F_OK | X_OK | W_OK | R_OK)
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/** Determine accessibility of a file.
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The access() function checks the file, named by the pathname pointed to by
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the Path argument, for accessibility according to the bit pattern contained
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in Mode.
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The value of Mode is either the bitwise-inclusive OR of the access
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permissions to be checked (R_OK, W_OK, X_OK) or the existence test (F_OK).
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If Path ends in '/' or '\\', the target must be a directory, otherwise it doesn't matter.
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A file is executable if it is NOT a directory and it ends in ".efi".
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@param[in] Path Path or name of the file to be checked.
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@param[in] Mode Access permissions to check for.
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@retval 0 Successful completion.
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@retval -1 File is not accessible with the given Mode. The error condition
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is indicated by errno. Values of errno specific to the access
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function include: EACCES, ENOENT, ENOTDIR, ENAMETOOLONG
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**/
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int
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access(
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const char *Path,
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int Mode
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)
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{
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struct stat FileStat;
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int retval = -1;
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size_t PLength;
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uint32_t WantDir;
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uint32_t DirMatch;
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if((Path == NULL) || ((Mode & ~GOOD_MODE) != 0)) {
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errno = EINVAL;
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}
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else {
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PLength = strlen(Path);
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if(PLength > PATH_MAX) {
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errno = ENAMETOOLONG;
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}
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else {
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retval = stat(Path, &FileStat);
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if(retval == 0) {
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/* Path exists. FileStat now holds valid information. */
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WantDir = isDirSep(Path[PLength - 1]); // Does Path end in '/' or '\\' ?
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DirMatch = (! WantDir && (! S_ISDIR(FileStat.st_mode)));
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/* Test each permission individually. */
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do {
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if(Mode == F_OK) { /* Existence test. */
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if(DirMatch) { /* This is a directory or file as desired. */
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retval = 0;
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}
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else {
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/* Indicate why we failed the test. */
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errno = (WantDir) ? ENOTDIR : EISDIR;
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}
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break; /* F_OK does not combine with any other tests. */
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}
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if(Mode & R_OK) {
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if((FileStat.st_mode & READ_PERMS) == 0) {
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/* No read permissions.
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For UEFI, everything should have READ permissions.
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*/
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errno = EDOOFUS; /* Programming Error. */
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break;
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}
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}
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if(Mode & W_OK) {
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if((FileStat.st_mode & WRITE_PERMS) == 0) {
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/* No write permissions. */
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errno = EACCES; /* Writing is not OK. */
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break;
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}
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}
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if(Mode & X_OK) {
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/* In EDK II, executable files end in ".efi" */
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if(strcmp(&Path[PLength-4], ".efi") != 0) {
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/* File is not an executable. */
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errno = EACCES;
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break;
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}
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}
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retval = 0;
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} while(FALSE);
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}
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else {
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/* File or path does not exist. */
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errno = ENOENT;
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}
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}
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}
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return retval;
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}
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