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Added the MakeFileExecutable() method. This method takes a filename and

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gives it execute access while respecting the user's umask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8324 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
John Criswell 2003-09-02 20:14:57 +00:00
parent de73193f3e
commit 6991a03753
4 changed files with 130 additions and 0 deletions
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15
include/Support/FileUtilities.h
View File

@ -36,4 +36,19 @@ void removeFile(const std::string &Filename);
///
std::string getUniqueFilename(const std::string &FilenameBase);
///
/// Method: MakeFileExecutable()
///
/// Description:
/// This method turns on whatever access attributes are needed to make the
/// specified file executable.
///
/// Return value:
/// True - The operation succeeded.
/// False - The operation failed.
///
/// Notes:
/// In case of failure, the file's access attributes are unspecified.
///
bool MakeFileExecutable (const std::string & Filename);
#endif

15
include/llvm/Support/FileUtilities.h
View File

@ -36,4 +36,19 @@ void removeFile(const std::string &Filename);
///
std::string getUniqueFilename(const std::string &FilenameBase);
///
/// Method: MakeFileExecutable()
///
/// Description:
/// This method turns on whatever access attributes are needed to make the
/// specified file executable.
///
/// Return value:
/// True - The operation succeeded.
/// False - The operation failed.
///
/// Notes:
/// In case of failure, the file's access attributes are unspecified.
///
bool MakeFileExecutable (const std::string & Filename);
#endif

50
lib/Support/FileUtilities.cpp
View File

@ -7,6 +7,8 @@
#include "Support/FileUtilities.h"
#include "Config/unistd.h"
#include "Config/sys/stat.h"
#include "Config/sys/types.h"
#include <fstream>
#include <iostream>
#include <cstdio>
@ -90,3 +92,51 @@ std::string getUniqueFilename(const std::string &FilenameBase) {
delete[] FNBuffer;
return Result;
}
///
/// Method: MakeFileExecutable ()
///
/// Description:
/// This method makes the specified filename executable by giving it
/// execute permission.
///
/// For the UNIX version of this method, we turn on all of the read and
/// execute bits and then turn off anything specified in the umask. This
/// should help ensure that access to the file remains at the level that
/// the user desires.
///
bool
MakeFileExecutable (const std::string & Filename)
{
// Permissions masking value of the user
mode_t mask;
// Permissions currently enabled on the file
struct stat fstat;
//
// Grab the umask value from the operating system. We want to use it when
// changing the file's permissions.
//
// Note:
// Umask() is one of those annoying system calls. You have to call it
// to get the current value and then set it back.
//
mask = umask (0x777);
umask (mask);
//
// Go fetch the file's current permission bits. We want to *add* execute
// access to the file.
//
if ((stat (Filename.c_str(), &fstat)) == -1)
{
return false;
}
// Make the script executable...
chmod(Filename.c_str(), (fstat.st_mode | (0111 & ~mask)));
return true;
}

50
support/lib/Support/FileUtilities.cpp
View File

@ -7,6 +7,8 @@
#include "Support/FileUtilities.h"
#include "Config/unistd.h"
#include "Config/sys/stat.h"
#include "Config/sys/types.h"
#include <fstream>
#include <iostream>
#include <cstdio>
@ -90,3 +92,51 @@ std::string getUniqueFilename(const std::string &FilenameBase) {
delete[] FNBuffer;
return Result;
}
///
/// Method: MakeFileExecutable ()
///
/// Description:
/// This method makes the specified filename executable by giving it
/// execute permission.
///
/// For the UNIX version of this method, we turn on all of the read and
/// execute bits and then turn off anything specified in the umask. This
/// should help ensure that access to the file remains at the level that
/// the user desires.
///
bool
MakeFileExecutable (const std::string & Filename)
{
// Permissions masking value of the user
mode_t mask;
// Permissions currently enabled on the file
struct stat fstat;
//
// Grab the umask value from the operating system. We want to use it when
// changing the file's permissions.
//
// Note:
// Umask() is one of those annoying system calls. You have to call it
// to get the current value and then set it back.
//
mask = umask (0x777);
umask (mask);
//
// Go fetch the file's current permission bits. We want to *add* execute
// access to the file.
//
if ((stat (Filename.c_str(), &fstat)) == -1)
{
return false;
}
// Make the script executable...
chmod(Filename.c_str(), (fstat.st_mode | (0111 & ~mask)));
return true;
}