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For PR351:
Implement three new functions to allow setting access/permission bits on the file referenced by a path. The makeReadable and makeExecutable methods replace the FileUtilities MakeFileReadable and MakeFileExecutable functions. The makeWritable function is new and provided for consistency since Path has a writable() method. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18907 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -256,6 +256,42 @@ Path::getStatusInfo(StatusInfo& info) const {
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path += '/';
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}
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static bool AddPermissionBits(const std::string& Filename, int bits) {
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// Get the umask value from the operating system. We want to use it
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// when changing the file's permissions. Since calling umask() sets
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// the umask and returns its old value, we must call it a second
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// time to reset it to the user's preference.
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int mask = umask(0777); // The arg. to umask is arbitrary.
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umask(mask); // Restore the umask.
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// Get the file's current mode.
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struct stat st;
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if ((stat(Filename.c_str(), &st)) == -1)
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return false;
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// Change the file to have whichever permissions bits from 'bits'
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// that the umask would not disable.
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if ((chmod(Filename.c_str(), (st.st_mode | (bits & ~mask)))) == -1)
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return false;
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return true;
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}
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void Path::makeReadable() {
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if (!AddPermissionBits(path,0444))
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ThrowErrno(path + ": can't make file readable");
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}
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void Path::makeWriteable() {
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if (!AddPermissionBits(path,0222))
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ThrowErrno(path + ": can't make file writable");
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}
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void Path::makeExecutable() {
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if (!AddPermissionBits(path,0111))
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ThrowErrno(path + ": can't make file executable");
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}
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bool
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Path::getDirectoryContents(std::set<Path>& result) const {
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if (!isDirectory())
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