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Userland: Add strace parameter for output log file

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This commit is contained in:
Sahan Fernando 2020-12-24 23:08:58 +11:00 committed by Andreas Kling
parent b71edba06d
commit 3eeb00b003
Notes: sideshowbarker 2024-07-19 00:38:28 +09:00 
Author: https://github.com/ccapitalK
Commit: https://github.com/SerenityOS/serenity/commit/3eeb00b003a
Pull-request: https://github.com/SerenityOS/serenity/pull/4519
1 changed files with 16 additions and 2 deletions
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18
Userland/strace.cpp
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@ -30,6 +30,7 @@
#include <Kernel/API/Syscall.h>
#include <LibC/sys/arch/i386/regs.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
@ -54,18 +55,31 @@ int main(int argc, char** argv)
{
Vector<const char*> child_argv;
const char* output_filename = nullptr;
auto trace_file = Core::File::standard_output();
Core::ArgsParser parser;
parser.set_general_help(
"Trace all syscalls and their result.");
parser.add_option(g_pid, "Trace the given PID", "pid", 'p', "pid");
parser.add_option(output_filename, "Filename to write output to", "output", 'o', "output");
parser.add_positional_argument(child_argv, "Arguments to exec", "argument", Core::ArgsParser::Required::No);
parser.parse(argc, argv);
if (output_filename != nullptr) {
auto open_result = Core::File::open(output_filename, Core::IODevice::OpenMode::WriteOnly);
if (open_result.is_error()) {
outln(stderr, "Failed to open output file: {}", open_result.error());
return 1;
}
trace_file = open_result.value();
}
int status;
if (g_pid == -1) {
if (child_argv.is_empty()) {
fprintf(stderr, "strace: Expected either a pid or some arguments\n");
outln(stderr, "strace: Expected either a pid or some arguments\n");
return 1;
}
@ -145,7 +159,7 @@ int main(int argc, char** argv)
u32 res = regs.eax;
fprintf(stderr, "%s(0x%x, 0x%x, 0x%x)\t=%d\n",
trace_file->printf("%s(0x%x, 0x%x, 0x%x)\t=%d\n",
Syscall::to_string(
(Syscall::Function)syscall_index),
arg1,