From 7f1fd10cfebd5ea2f3e1938abe1bd1c4828164a7 Mon Sep 17 00:00:00 2001 From: Fabio Berton Date: Fri, 9 Sep 2016 16:00:42 -0300 Subject: [PATCH] handle read-only files Patch from: https://github.com/darealshinji/patchelf/commit/40e66392bc4b96e9b4eda496827d26348a503509 Upstream-Status: Denied [https://github.com/NixOS/patchelf/pull/89] Signed-off-by: Fabio Berton --- src/patchelf.cc | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/src/patchelf.cc b/src/patchelf.cc index 0b4965adff83..b5db2aef0e8a 100644 --- a/src/patchelf.cc +++ b/src/patchelf.cc @@ -497,7 +497,17 @@ void ElfFile::sortShdrs() static void writeFile(std::string fileName, FileContents contents) { - int fd = open(fileName.c_str(), O_TRUNC | O_WRONLY); + struct stat st; + int fd; + + if (stat(fileName.c_str(), &st) != 0) + error("stat"); + + if (chmod(fileName.c_str(), 0600) != 0) + error("chmod"); + + fd = open(fileName.c_str(), O_TRUNC | O_WRONLY); + if (fd == -1) error("open"); @@ -511,6 +521,10 @@ static void writeFile(std::string fileName, FileContents contents) if (close(fd) != 0) error("close"); + + if (chmod(fileName.c_str(), st.st_mode) != 0) + error("chmod"); + }