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libbase: realpath is wrapped with TEMP_FAILURE_RETRY 

Although man page for realpath doesn't say so, the bionic
implementation of realpath may exit with error code
EINTR. In such cases, retry.

Test: boots (sanity)
Change-Id: Ic5feb7152374a81bd2f475ad74c4bc8c3afb3a20
This commit is contained in:
Yifan Hong 2019-03-21 15:20:53 -07:00
parent 26328e80b1
commit 5f4cb8a240
1 changed files with 6 additions and 1 deletions
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7
base/file.cpp
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@ -385,7 +385,12 @@ bool Readlink(const std::string& path, std::string* result) {
bool Realpath(const std::string& path, std::string* result) {
result->clear();
char* realpath_buf = realpath(path.c_str(), nullptr);
// realpath may exit with EINTR. Retry if so.
char* realpath_buf = nullptr;
do {
realpath_buf = realpath(path.c_str(), nullptr);
} while (realpath_buf == nullptr && errno == EINTR);
if (realpath_buf == nullptr) {
return false;
}