Revert "init: use read_file and write_file to implement do_copy builtin"
Bug: 36726045
Test: gts-tradefed run gts --abi x86 -m GtsMediaTestCases -t com.google.android.media.gts.MediaCodecCencTest#testCENC_DASH_FMP4_H264_360P_PLAYREADY_CENC
This reverts commit 82bac0de6d95bcdf45729516f6a4f29eb2681118.
Change-Id: I3b754f429499daec804a0ad25529294216c39a40
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 02e314f..64a2d82 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -702,11 +702,51 @@
}
static int do_copy(const std::vector<std::string>& args) {
- std::string data;
- if (read_file(args[1].c_str(), &data)) {
- return write_file(args[2].c_str(), data.data()) ? 0 : 1;
+ char* buffer = NULL;
+ int rc = 0;
+ int fd1 = -1, fd2 = -1;
+ struct stat info;
+ int brtw, brtr;
+ char* p;
+
+ if (stat(args[1].c_str(), &info) < 0) return -1;
+
+ if ((fd1 = open(args[1].c_str(), O_RDONLY | O_CLOEXEC)) < 0) goto out_err;
+
+ if ((fd2 = open(args[2].c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0660)) < 0)
+ goto out_err;
+
+ if (!(buffer = (char*)malloc(info.st_size))) goto out_err;
+
+ p = buffer;
+ brtr = info.st_size;
+ while (brtr) {
+ rc = read(fd1, p, brtr);
+ if (rc < 0) goto out_err;
+ if (rc == 0) break;
+ p += rc;
+ brtr -= rc;
}
- return 1;
+
+ p = buffer;
+ brtw = info.st_size;
+ while (brtw) {
+ rc = write(fd2, p, brtw);
+ if (rc < 0) goto out_err;
+ if (rc == 0) break;
+ p += rc;
+ brtw -= rc;
+ }
+
+ rc = 0;
+ goto out;
+out_err:
+ rc = -1;
+out:
+ if (buffer) free(buffer);
+ if (fd1 >= 0) close(fd1);
+ if (fd2 >= 0) close(fd2);
+ return rc;
}
static int do_chown(const std::vector<std::string>& args) {