From ec03af7e3be73e8f73beb28cccdd19e715655e69 Mon Sep 17 00:00:00 2001
From: Philippe Pittoli <karchnu@karchnu.fr>
Date: Sun, 22 Dec 2024 00:46:13 +0100
Subject: [PATCH] paintest can now run a child process
---
c/paintest.c | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/c/paintest.c b/c/paintest.c
index 1b59ac1..5569e22 100644
--- a/c/paintest.c
+++ b/c/paintest.c
@@ -5,6 +5,8 @@
#include <netdb.h>
+#include <sys/wait.h>
+
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
@@ -281,6 +283,35 @@ void network_server(char *port) {
}
}
+void execute(char *filename) {
+ printf("execute: %s\n", filename);
+ pid_t cpuid = 0;
+
+ cpuid = fork();
+ if (cpuid == -1) {
+ fprintf(stderr, "fork failed\n");
+ return;
+ }
+
+ if (cpuid == 0) {
+ printf("I'm the child\n");
+ int ret = execl(filename, "hello", NULL);
+ if (ret == -1) {
+ printf("failed to exec %s\n", filename);
+ exit(EXIT_FAILURE);
+ }
+ printf("wait, what? probably failed to exec %s\n", filename);
+ exit(EXIT_FAILURE);
+ }
+ else {
+ printf("I'm the parent\n");
+ int status;
+ wait(&status);
+ printf("child exited with %d\n", status);
+ }
+}
+
+
void usage(void) {
printf("usage: paintest r /path/to/file w /path/to/file n example.com:8080 u /unix/socket/path\n");
}
@@ -293,13 +324,14 @@ int main(int argc, char **argv)
exit (EXIT_SUCCESS);
}
- while (i != argc) {
+ while (i < argc) {
if (memcmp(argv[i], "r", 1) == 0) { read_file(argv[i+1]); }
else if (memcmp(argv[i], "w", 1) == 0) { write_file(argv[i+1]); }
else if (memcmp(argv[i], "n", 1) == 0) { network_client(argv[i+1], argv[i+2]); i++; }
else if (memcmp(argv[i], "N", 1) == 0) { network_server(argv[i+1]); }
else if (memcmp(argv[i], "u", 1) == 0) { unixsock_client(argv[i+1]); }
else if (memcmp(argv[i], "U", 1) == 0) { unixsock_server(argv[i+1]); }
+ else if (memcmp(argv[i], "x", 1) == 0) { execute(argv[i+1]); }
else if (memcmp(argv[i], "h", 1) == 0) { usage(); }
i += 2;
}