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Added killall command (#30)

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* Added killall command

* Fixed feedbacks of awesomekling
This commit is contained in:
GuillaumeGas 2019-05-08 09:52:37 -07:00 committed by Andreas Kling
parent 81a280da87
commit cea631d90c
Notes: sideshowbarker 2024-07-19 14:11:42 +09:00 
Author: https://github.com/GuillaumeGas 🔰
Commit: https://github.com/SerenityOS/serenity/commit/cea631d90c4
Pull-request: https://github.com/SerenityOS/serenity/pull/30
Reviewed-by: https://github.com/awesomekling ✅
1 changed files with 76 additions and 0 deletions
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Userland/killall.cpp Normal file
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#include <unistd.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <LibCore/CFile.h>
#include <AK/AKString.h>
static void print_usage_and_exit()
{
printf("usage: killall [-signal] process_name\n");
exit(1);
}
static int kill_all(const String& process_name, const unsigned signum)
{
CFile file("/proc/all");
if (!file.open(CIODevice::ReadOnly)) {
fprintf(stderr, "killall failed to open /proc/all\n");
return 3;
}
for (;;) {
auto line = file.read_line(1024);
if (line.is_empty())
break;
auto chomped = String((const char*)line.pointer(), line.size() - 1, Chomp);
auto parts = chomped.split_view(',');
if (parts.size() < 18)
break;
bool ok = false;
pid_t pid = parts[0].to_uint(ok);
String name = parts[11];
if (!ok) {
fprintf(stderr, "killall failed : couldn't convert %s to a valid pid\n", parts[0].characters());
return 4;
}
if (name == process_name) {
int ret = kill(pid, signum);
if (ret < 0)
perror("kill");
}
}
return 0;
}
int main(int argc, char** argv)
{
bool ok;
unsigned signum = SIGTERM;
int name_argi = 1;
if (argc != 2 && argc != 3)
print_usage_and_exit();
if (argc == 3) {
name_argi = 2;
if (argv[1][0] != '-')
print_usage_and_exit();
signum = String(&argv[1][1]).to_uint(ok);
if (!ok) {
printf("'%s' is not a valid signal number\n", &argv[1][1]);
return 2;
}
}
return kill_all(argv[name_argi], signum);
}