Squash commits for public release

userland/utilities/ls/.info.mk

@@ -0,0 +1,5 @@
+APPS += LS
+
+LS_NAME = ls
+LS_LIBS = c
+LS_INSTALL_PATH = bin/

userland/utilities/ls/BUILD.gn

@@ -0,0 +1,8 @@
+import("//build/userland/TEMPLATE.gni")
+
+xOS_executable("ls") {
+  install_path = "bin/"
+  sources = [ "main.c" ]
+  configs = [ "//build/userland:userland_flags" ]
+  deplibs = [ "libc" ]
+}

userland/utilities/ls/main.c

@@ -0,0 +1,72 @@
+#include <dirent.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define BUF_SIZE 1024
+
+struct linux_dirent {
+    uint32_t inode;
+    uint16_t rec_len;
+    uint8_t name_len;
+    uint8_t file_type;
+    char* name;
+};
+
+int main(int argc, char** argv)
+{
+    int fd, nread;
+    char buf[BUF_SIZE];
+    struct linux_dirent* d;
+    int bpos;
+    char d_type;
+    char has_path = 0;
+    char show_inodes = 0;
+    char show_private = 0;
+
+    for (int i = 1; i < argc; i++) {
+        if (memcmp(argv[i], "-i", 3) == 0) {
+            show_inodes = 1;
+        } else if (memcmp(argv[i], "-a", 3) == 0) {
+            show_private = 1;
+        } else {
+            has_path = 1;
+        }
+    }
+
+    if (has_path) {
+        fd = open(argv[1], O_RDONLY | O_DIRECTORY);
+    } else {
+        fd = open(".", O_RDONLY | O_DIRECTORY);
+    }
+
+    if (fd < 0) {
+        printf("ls: can't open file\n");
+        return -1;
+    }
+    for (;;) {
+        nread = getdents(fd, buf, BUF_SIZE);
+        if (nread < 0) {
+            printf("ls: can't read dir\n");
+            return -1;
+        }
+
+        if (nread == 0)
+            break;
+
+        for (bpos = 0; bpos < nread;) {
+            d = (struct linux_dirent*)(buf + bpos);
+            if (((char*)&d->name)[0] != '.' || show_private) {
+                printf("%s", (char*)&d->name);
+                if (show_inodes) {
+                    printf(" %d", d->inode);
+                }
+                printf("\n");
+            }
+            bpos += d->rec_len;
+        }
+    }
+    return 0;
+}