libprocinfo: return error msg instead of printing it.
So users can decide whether to print error msg or not.
Bug: none
Test: run libprocinfo_test.
Change-Id: Ie1afcb58cb97493c7ffade6841b6eb7a800a3981
diff --git a/libprocinfo/process.cpp b/libprocinfo/process.cpp
index 6e5be6e..9194cf3 100644
--- a/libprocinfo/process.cpp
+++ b/libprocinfo/process.cpp
@@ -31,17 +31,19 @@
namespace android {
namespace procinfo {
-bool GetProcessInfo(pid_t tid, ProcessInfo* process_info) {
+bool GetProcessInfo(pid_t tid, ProcessInfo* process_info, std::string* error) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "/proc/%d", tid);
unique_fd dirfd(open(path, O_DIRECTORY | O_RDONLY));
if (dirfd == -1) {
- PLOG(ERROR) << "failed to open " << path;
+ if (error != nullptr) {
+ *error = std::string("failed to open ") + path;
+ }
return false;
}
- return GetProcessInfoFromProcPidFd(dirfd.get(), process_info);
+ return GetProcessInfoFromProcPidFd(dirfd.get(), process_info, error);
}
static ProcessState parse_state(const char* state) {
@@ -62,17 +64,21 @@
}
}
-bool GetProcessInfoFromProcPidFd(int fd, ProcessInfo* process_info) {
+bool GetProcessInfoFromProcPidFd(int fd, ProcessInfo* process_info, std::string* error) {
int status_fd = openat(fd, "status", O_RDONLY | O_CLOEXEC);
if (status_fd == -1) {
- PLOG(ERROR) << "failed to open status fd in GetProcessInfoFromProcPidFd";
+ if (error != nullptr) {
+ *error = "failed to open status fd in GetProcessInfoFromProcPidFd";
+ }
return false;
}
std::unique_ptr<FILE, decltype(&fclose)> fp(fdopen(status_fd, "r"), fclose);
if (!fp) {
- PLOG(ERROR) << "failed to open status file in GetProcessInfoFromProcPidFd";
+ if (error != nullptr) {
+ *error = "failed to open status file in GetProcessInfoFromProcPidFd";
+ }
close(status_fd);
return false;
}