From 682fb48c137b687477008b68863c2a0b73ed47d1 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 fd1e7b7..a941da1 100644 --- a/src/patchelf.cc +++ b/src/patchelf.cc @@ -527,9 +527,19 @@ void ElfFile::sortShdrs() static void writeFile(const std::string & fileName, const FileContents & contents) { + struct stat st; + int fd; + debug("writing %s\n", fileName.c_str()); - int fd = open(fileName.c_str(), O_CREAT | O_TRUNC | O_WRONLY, 0777); + if (stat(fileName.c_str(), &st) != 0) + error("stat"); + + if (chmod(fileName.c_str(), 0600) != 0) + error("chmod"); + + fd = open(fileName.c_str(), O_CREAT | O_TRUNC | O_WRONLY, 0777); + if (fd == -1) error("open"); @@ -543,6 +553,10 @@ static void writeFile(const std::string & fileName, const FileContents & content if (close(fd) != 0) error("close"); + + if (chmod(fileName.c_str(), st.st_mode) != 0) + error("chmod"); + }