From 4e09bca9e34c226b6d7e34b4fa11248405fd988e Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Sun, 22 Oct 2023 19:50:38 +0200
Subject: Move everything into a new repo.

---
 userland/libc/unistd/_exit.c  |  8 ++++++++
 userland/libc/unistd/execvp.c |  8 ++++++++
 userland/libc/unistd/getopt.c | 14 ++++++++++++++
 userland/libc/unistd/getpid.c |  7 +++++++
 userland/libc/unistd/msleep.c |  6 ++++++
 userland/libc/unistd/unlink.c |  7 +++++++
 userland/libc/unistd/uptime.c |  6 ++++++
 7 files changed, 56 insertions(+)
 create mode 100644 userland/libc/unistd/_exit.c
 create mode 100644 userland/libc/unistd/execvp.c
 create mode 100644 userland/libc/unistd/getopt.c
 create mode 100644 userland/libc/unistd/getpid.c
 create mode 100644 userland/libc/unistd/msleep.c
 create mode 100644 userland/libc/unistd/unlink.c
 create mode 100644 userland/libc/unistd/uptime.c

(limited to 'userland/libc/unistd')

diff --git a/userland/libc/unistd/_exit.c b/userland/libc/unistd/_exit.c
new file mode 100644
index 0000000..c6d64be
--- /dev/null
+++ b/userland/libc/unistd/_exit.c
@@ -0,0 +1,8 @@
+#include <syscall.h>
+#include <unistd.h>
+
+// FIXME: Technically exit and _exit are different but this
+// stackoverflow answer says that it does not usually matter. So lets
+// hope that is the case.
+// https://stackoverflow.com/a/5423108
+void _exit(int status) { syscall(SYS_EXIT, (void *)status, 0, 0, 0, 0); }
diff --git a/userland/libc/unistd/execvp.c b/userland/libc/unistd/execvp.c
new file mode 100644
index 0000000..573e822
--- /dev/null
+++ b/userland/libc/unistd/execvp.c
@@ -0,0 +1,8 @@
+#include <unistd.h>
+#include <syscall.h>
+
+// FIXME: Path resolution
+int execvp(const char *file, char *const argv[]) {
+  struct SYS_EXEC_PARAMS args = {.path = file, .argv = argv};
+  return syscall(SYS_EXEC, &args, 0, 0, 0, 0);
+}
diff --git a/userland/libc/unistd/getopt.c b/userland/libc/unistd/getopt.c
new file mode 100644
index 0000000..a026b59
--- /dev/null
+++ b/userland/libc/unistd/getopt.c
@@ -0,0 +1,14 @@
+#include <assert.h>
+#include <unistd.h>
+
+int opterr, optind, optopt;
+char *optarg;
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
+int getopt(int argc, char *const argv[], const char *optstring) {
+  // TODO
+  optind = 1;
+  optarg = NULL;
+  //  assert(0);
+  return -1;
+}
diff --git a/userland/libc/unistd/getpid.c b/userland/libc/unistd/getpid.c
new file mode 100644
index 0000000..8aeef10
--- /dev/null
+++ b/userland/libc/unistd/getpid.c
@@ -0,0 +1,7 @@
+#include <unistd.h>
+#include <syscall.h>
+#include <sys/types.h>
+
+pid_t getpid(void) {
+    return s_syscall(SYS_GETPID);
+}
diff --git a/userland/libc/unistd/msleep.c b/userland/libc/unistd/msleep.c
new file mode 100644
index 0000000..0b016c6
--- /dev/null
+++ b/userland/libc/unistd/msleep.c
@@ -0,0 +1,6 @@
+// Not standard, but it feels like it should be.
+#include <syscall.h>
+#include <unistd.h>
+#include <stdint.h>
+
+void msleep(uint32_t ms) { syscall(SYS_MSLEEP, (void *)ms, 0, 0, 0, 0); }
diff --git a/userland/libc/unistd/unlink.c b/userland/libc/unistd/unlink.c
new file mode 100644
index 0000000..ccac0df
--- /dev/null
+++ b/userland/libc/unistd/unlink.c
@@ -0,0 +1,7 @@
+#include <unistd.h>
+
+int unlink(const char *path) {
+  // TODO
+  printf("TODO: Implement unlink");
+  return 0;
+}
diff --git a/userland/libc/unistd/uptime.c b/userland/libc/unistd/uptime.c
new file mode 100644
index 0000000..090a0e5
--- /dev/null
+++ b/userland/libc/unistd/uptime.c
@@ -0,0 +1,6 @@
+// Not standard, but it feels like it should be.
+#include <stdint.h>
+#include <syscall.h>
+#include <unistd.h>
+
+uint32_t uptime(void) { return syscall(SYS_UPTIME, 0, 0, 0, 0, 0); }
-- 
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