From b09263bd64b3408cbd109dacc4b7618d22b02248 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 10 Jun 2023 16:26:46 +0200
Subject: kernel: implement getpid, getppid

---
 src/user/app/shell/shell.c | 3 +++
 src/user/lib/syscall.c     | 8 ++++++++
 src/user/lib/unistd.c      | 4 ++--
 3 files changed, 13 insertions(+), 2 deletions(-)

(limited to 'src/user')

diff --git a/src/user/app/shell/shell.c b/src/user/app/shell/shell.c
index becc8d8..8e13029 100644
--- a/src/user/app/shell/shell.c
+++ b/src/user/app/shell/shell.c
@@ -80,6 +80,9 @@ void run_args(int argc, char **argv, struct redir *redir) {
 		return;
 	} else if (!strcmp(argv[0], "exit")) {
 		exit(0);
+	} else if (!strcmp(argv[0], "getpid")) {
+		printf("my\t%d\nparent\t%d\n", getpid(), getppid());
+		return;
 	}
 
 	if (fork()) {
diff --git a/src/user/lib/syscall.c b/src/user/lib/syscall.c
index f7eaddb..3e8473c 100644
--- a/src/user/lib/syscall.c
+++ b/src/user/lib/syscall.c
@@ -82,6 +82,14 @@ void _sys_intr_set(void __user *ip) {
 	return (void)_syscall(_SYS_INTR_SET, (long)ip, 0, 0, 0, 0);
 }
 
+uint32_t _sys_getpid(void) {
+	return (uint32_t)_syscall(_SYS_GETPID, 0, 0, 0, 0, 0);
+}
+
+uint32_t _sys_getppid(void) {
+	return (uint32_t)_syscall(_SYS_GETPPID, 0, 0, 0, 0, 0);
+}
+
 long _sys_execbuf(void __user *buf, size_t len) {
 	return _syscall(_SYS_EXECBUF, (long)buf, (long)len, 0, 0, 0);
 }
diff --git a/src/user/lib/unistd.c b/src/user/lib/unistd.c
index 28164e6..d6f24f8 100644
--- a/src/user/lib/unistd.c
+++ b/src/user/lib/unistd.c
@@ -185,11 +185,11 @@ pid_t getpgrp(void) {
 }
 
 pid_t getpid(void) {
-	__libc_panic("unimplemented");
+	return _sys_getpid();
 }
 
 pid_t getppid(void) {
-	__libc_panic("unimplemented");
+	return _sys_getppid();
 }
 
 int getgroups(int size, gid_t list[]) {
-- 
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