1 files changed, 76 insertions, 0 deletions
diff --git a/Userland/killall.cpp b/Userland/killall.cpp
new file mode 100644
index 0000000000..cd28a6a56b
--- /dev/null
+++ b/Userland/killall.cpp
@@ -0,0 +1,76 @@
+#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);
+}