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authorTao Bao <tbao@google.com>2018-12-20 23:10:07 +0100
committerGerrit Code Review <noreply-gerritcodereview@google.com>2018-12-20 23:10:07 +0100
commitf0c03e62a2fe855ac15a04265d6dc3337c63e360 (patch)
treec08c10e3acf70606bf61e1d68b582f72f0aa1572 /updater/install.cpp
parentMerge changes from topic "vintf_object_recovery_mount" (diff)
parentClean up the arg setup for exec(3). (diff)
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Diffstat (limited to 'updater/install.cpp')
-rw-r--r--updater/install.cpp88
1 files changed, 34 insertions, 54 deletions
diff --git a/updater/install.cpp b/updater/install.cpp
index ccde409df..0e1028bd1 100644
--- a/updater/install.cpp
+++ b/updater/install.cpp
@@ -393,17 +393,20 @@ Value* UnmountFn(const char* name, State* state, const std::vector<std::unique_p
return StringValue(mount_point);
}
-static int exec_cmd(const char* path, char* const argv[]) {
+static int exec_cmd(const std::vector<std::string>& args) {
+ CHECK(!args.empty());
+ auto argv = StringVectorToNullTerminatedArray(args);
+
pid_t child;
if ((child = vfork()) == 0) {
- execv(path, argv);
+ execv(argv[0], argv.data());
_exit(EXIT_FAILURE);
}
int status;
waitpid(child, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
- LOG(ERROR) << path << " failed with status " << WEXITSTATUS(status);
+ LOG(ERROR) << args[0] << " failed with status " << WEXITSTATUS(status);
}
return WEXITSTATUS(status);
}
@@ -453,62 +456,52 @@ Value* FormatFn(const char* name, State* state, const std::vector<std::unique_pt
}
if (fs_type == "ext4") {
- const char* mke2fs_argv[] = { "/system/bin/mke2fs", "-t", "ext4", "-b", "4096",
- location.c_str(), nullptr, nullptr };
- std::string size_str;
+ std::vector<std::string> mke2fs_args = {
+ "/system/bin/mke2fs", "-t", "ext4", "-b", "4096", location
+ };
if (size != 0) {
- size_str = std::to_string(size / 4096LL);
- mke2fs_argv[6] = size_str.c_str();
+ mke2fs_args.push_back(std::to_string(size / 4096LL));
}
- int status = exec_cmd(mke2fs_argv[0], const_cast<char**>(mke2fs_argv));
- if (status != 0) {
+ if (auto status = exec_cmd(mke2fs_args); status != 0) {
LOG(ERROR) << name << ": mke2fs failed (" << status << ") on " << location;
return StringValue("");
}
- const char* e2fsdroid_argv[] = { "/system/bin/e2fsdroid", "-e", "-a", mount_point.c_str(),
- location.c_str(), nullptr };
- status = exec_cmd(e2fsdroid_argv[0], const_cast<char**>(e2fsdroid_argv));
- if (status != 0) {
+ if (auto status = exec_cmd({ "/system/bin/e2fsdroid", "-e", "-a", mount_point, location });
+ status != 0) {
LOG(ERROR) << name << ": e2fsdroid failed (" << status << ") on " << location;
return StringValue("");
}
return StringValue(location);
- } else if (fs_type == "f2fs") {
+ }
+
+ if (fs_type == "f2fs") {
if (size < 0) {
LOG(ERROR) << name << ": fs_size can't be negative for f2fs: " << fs_size;
return StringValue("");
}
- std::string num_sectors = std::to_string(size / 512);
-
- const char* f2fs_path = "/sbin/mkfs.f2fs";
- const char* f2fs_argv[] = { "mkfs.f2fs",
- "-g", "android",
- "-w", "512",
- location.c_str(),
- (size < 512) ? nullptr : num_sectors.c_str(),
- nullptr };
- int status = exec_cmd(f2fs_path, const_cast<char**>(f2fs_argv));
- if (status != 0) {
+ std::vector<std::string> f2fs_args = {
+ "/sbin/mkfs.f2fs", "-g", "android", "-w", "512", location
+ };
+ if (size >= 512) {
+ f2fs_args.push_back(std::to_string(size / 512));
+ }
+ if (auto status = exec_cmd(f2fs_args); status != 0) {
LOG(ERROR) << name << ": mkfs.f2fs failed (" << status << ") on " << location;
return StringValue("");
}
- const char* sload_argv[] = { "/sbin/sload.f2fs", "-t", mount_point.c_str(), location.c_str(),
- nullptr };
- status = exec_cmd(sload_argv[0], const_cast<char**>(sload_argv));
- if (status != 0) {
+ if (auto status = exec_cmd({ "/sbin/sload.f2fs", "-t", mount_point, location }); status != 0) {
LOG(ERROR) << name << ": sload.f2fs failed (" << status << ") on " << location;
return StringValue("");
}
return StringValue(location);
- } else {
- LOG(ERROR) << name << ": unsupported fs_type \"" << fs_type << "\" partition_type \""
- << partition_type << "\"";
}
+ LOG(ERROR) << name << ": unsupported fs_type \"" << fs_type << "\" partition_type \""
+ << partition_type << "\"";
return nullptr;
}
@@ -675,17 +668,12 @@ Value* RunProgramFn(const char* name, State* state, const std::vector<std::uniqu
return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name);
}
- char* args2[argv.size() + 1];
- for (size_t i = 0; i < argv.size(); i++) {
- args2[i] = &args[i][0];
- }
- args2[argv.size()] = nullptr;
-
- LOG(INFO) << "about to run program [" << args2[0] << "] with " << argv.size() << " args";
+ auto exec_args = StringVectorToNullTerminatedArray(args);
+ LOG(INFO) << "about to run program [" << exec_args[0] << "] with " << argv.size() << " args";
pid_t child = fork();
if (child == 0) {
- execv(args2[0], args2);
+ execv(exec_args[0], exec_args.data());
PLOG(ERROR) << "run_program: execv failed";
_exit(EXIT_FAILURE);
}
@@ -909,20 +897,12 @@ Value* Tune2FsFn(const char* name, State* state, const std::vector<std::unique_p
return ErrorAbort(state, kArgsParsingFailure, "%s() could not read args", name);
}
- char* args2[argv.size() + 1];
- // Tune2fs expects the program name as its args[0]
- args2[0] = const_cast<char*>(name);
- if (args2[0] == nullptr) {
- return nullptr;
- }
- for (size_t i = 0; i < argv.size(); ++i) {
- args2[i + 1] = &args[i][0];
- }
+ // tune2fs expects the program name as its first arg.
+ args.insert(args.begin(), "tune2fs");
+ auto tune2fs_args = StringVectorToNullTerminatedArray(args);
- // tune2fs changes the file system parameters on an ext2 file system; it
- // returns 0 on success.
- int result = tune2fs_main(argv.size() + 1, args2);
- if (result != 0) {
+ // tune2fs changes the filesystem parameters on an ext2 filesystem; it returns 0 on success.
+ if (auto result = tune2fs_main(tune2fs_args.size() - 1, tune2fs_args.data()); result != 0) {
return ErrorAbort(state, kTune2FsFailure, "%s() returned error code %d", name, result);
}
return StringValue("t");