bool WriteStringToFile(const std::string& content, const std::string& path,
mode_t mode, uid_t owner, gid_t group) {
int fd = TEMP_FAILURE_RETRY(
open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW,
mode));
if (fd == -1) {
fprintf(stderr, "android::WriteStringToFile open failed: %s", strerror(errno));
return false;
}
// We do an explicit fchmod here because we assume that the caller really
// meant what they said and doesn't want the umask-influenced mode.
if (fchmod(fd, mode) == -1) {
fprintf(stderr, "android::WriteStringToFile fchmod failed: %s", strerror(errno));
return CleanUpAfterFailedWrite(path);
}
if (fchown(fd, owner, group) == -1) {
fprintf(stderr, "android::WriteStringToFile fchown failed: %s", strerror(errno));
return CleanUpAfterFailedWrite(path);
}
if (!WriteStringToFd(content, fd)) {
fprintf(stderr, "android::WriteStringToFile write failed: %s", strerror(errno));
return CleanUpAfterFailedWrite(path);
}
close(fd);
return true;
}
bool WriteStringToFile(const std::string &content, const std::string &path,
mode_t mode, uid_t owner, gid_t group,
bool follow_symlinks) {
int flags = O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_BINARY |
(follow_symlinks ? 0 : O_NOFOLLOW);
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(path.c_str(), flags, mode)));
if (fd == -1) {
PLOG(ERROR) << "android::WriteStringToFile open failed";
return false;
}
// We do an explicit fchmod here because we assume that the caller really
// meant what they said and doesn't want the umask-influenced mode.
if (fchmod(fd, mode) == -1) {
PLOG(ERROR) << "android::WriteStringToFile fchmod failed";
return CleanUpAfterFailedWrite(path);
}
if (fchown(fd, owner, group) == -1) {
PLOG(ERROR) << "android::WriteStringToFile fchown failed";
return CleanUpAfterFailedWrite(path);
}
if (!WriteStringToFd(content, fd)) {
PLOG(ERROR) << "android::WriteStringToFile write failed";
return CleanUpAfterFailedWrite(path);
}
return true;
}
bool WriteStringToFile(const std::string &content, const std::string &path,
bool follow_symlinks) {
int flags = O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_BINARY |
(follow_symlinks ? 0 : O_NOFOLLOW);
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(path.c_str(), flags, 0666)));
if (fd == -1) {
return false;
}
return WriteStringToFd(content, fd) || CleanUpAfterFailedWrite(path);
}
bool WriteStringToFile(const std::string& content, const std::string& path) {
int fd = TEMP_FAILURE_RETRY(
open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW,
DEFFILEMODE));
if (fd == -1) {
return false;
}
bool result = WriteStringToFd(content, fd);
close(fd);
return result || CleanUpAfterFailedWrite(path);
}
