diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Support/FileUtilities.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/llvm/lib/Support/FileUtilities.cpp b/llvm/lib/Support/FileUtilities.cpp index 3e4c270da56..01d7ca2126c 100644 --- a/llvm/lib/Support/FileUtilities.cpp +++ b/llvm/lib/Support/FileUtilities.cpp @@ -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; +} + |
