a start for pwd

src/pwd/pwd.c

@@ -1,6 +1,64 @@
+#include <errno.h>
+#include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-int main(void) {
-  printf("Hello, World!\n");
-  return 0;
-}
+#define NAME "pwd (canoutils)"
+#define VERSION "0.0.1"
+#define AUTHOR "cospplredman"
+
+#include "cgetopt.h"
+#include "version_info.h"
+
+static const char usage[] = {"Usage: pwd [Option]...\n"
+                             "  --version   version information\n"
+                             "  --help      display this help and exit\n"
+                             "  -L          print contents of PWD if it is the "
+                             "current directory (default)\n"
+                             "  -P          path written to standard out shall "
+                             "not have any symbolic names in it\n"};
+
+// flags
+static int output_format = 'L';
+
+static struct option long_options[] = {
+    {"version", no_argument, NULL, 'v'},
+    {"help", no_argument, NULL, 'h'},
+};
+
+int main(int argc, char **argv) {
+
+  int opt, option_index;
+  while ((opt = getopt_long(argc, argv, "LP", long_options, &option_index)) !=
+         -1) {
+    switch (opt) {
+    case 0:
+      break;
+    case 'v':
+      print_version();
+      return EXIT_SUCCESS;
+      break;
+    case 'h':
+      printf("%s\n", usage);
+      return EXIT_SUCCESS;
+    case 'L':
+      output_format = 'L';
+      break; // TODO implement
+    case 'P':
+      output_format = 'P';
+      break; // TODO
+    }
+  }
+
+  argc -= optind;
+  argv += optind;
+
+  if (argc > 0) {
+    fprintf(stderr, "%s\n", usage);
+    return EXIT_FAILURE;
+  }
+
+  char *path = getenv("PWD");
+  printf("%s\n", path);
+}