From a832a98eac303f11a147f4576325fdec56359799 Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Sun, 2 Jul 2023 21:12:16 +0200
Subject: Implement reaping

---
 command.c | 41 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 36 insertions(+), 5 deletions(-)

(limited to 'command.c')

diff --git a/command.c b/command.c
index 17aa5ff..305664b 100644
--- a/command.c
+++ b/command.c
@@ -3,6 +3,9 @@
 #include <ctype.h>
 #include <unistd.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 
 #include "nfcommander.h"
 #include "command.h"
@@ -34,7 +37,7 @@ int command_handle(int fd){
 				&& fd == commands[n].iopipe[0]){
 			bytes = read(fd, input_buffer, sizeof(input_buffer));
 			if(bytes < 0){
-				perror("command/recv");
+				perror("cmd/recv");
 			}
 			else if(bytes == 0){
 				printf("Command %lu pipe closed\n", n);
@@ -43,7 +46,8 @@ int command_handle(int fd){
 				commands[n].iopipe[0] = -1;
 			}
 			else{
-				printf("%d bytes from command %lu\n", bytes, n);
+				//TODO handle
+				printf("%d bytes from command %lu: %s\n", bytes, n, input_buffer);
 			}
 			return 0;
 		}
@@ -54,8 +58,32 @@ int command_handle(int fd){
 }
 
 void command_reap(){
-	//TODO
-	printf("Reaping children\n");
+	int wait_status;
+	pid_t status;
+	size_t n;
+
+	do {
+		status = waitpid(-1, &wait_status, WNOHANG);
+		if(status < 0 && errno != ECHILD){
+			perror("cmd/reap");
+		}
+		if(status <= 0){
+			return;
+		}
+
+		//find matching command
+		if(status){
+			for(n = 0; n < ncommands; n++){
+				if(commands[n].child == status){
+					commands[n].flags = 0;
+					commands[n].child = -1;
+					close(commands[n].iopipe[0]);
+					commands[n].iopipe[0] = -1;
+					printf("Command %lu terminated\n", n);
+				}
+			}
+		}
+	} while(status);
 }
 
 static int command_spawn(command_t* cmd, char* command_name, char* command_static, size_t arg_length){
@@ -68,6 +96,10 @@ static int command_spawn(command_t* cmd, char* command_name, char* command_stati
 		return 1;
 	}
 
+	if(fcntl(cmd->iopipe[0], F_SETFD, FD_CLOEXEC)){
+		perror("cmd/fcntl");
+	}
+
 	cmd->child = fork();
 	switch(cmd->child){
 		case -1:
@@ -84,7 +116,6 @@ static int command_spawn(command_t* cmd, char* command_name, char* command_stati
 			while((dup2(cmd->iopipe[1], STDOUT_FILENO) == -1) && (errno == EINTR)) {
 			}
 			close(cmd->iopipe[1]);
-			close(cmd->iopipe[0]);
 			execl(command_name, command_static, NULL);
 			perror("cmd/exec");
 			_exit(1);
-- 
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