2 files changed, 42 insertions, 0 deletions
diff --git a/src/cmd/pwd/makefile b/src/cmd/pwd/makefile
new file mode 100755
index 0000000..85f4d06
--- /dev/null
+++ b/src/cmd/pwd/makefile
@@ -0,0 +1,12 @@
+CFLAGS=-Wall -Werror
+
+build: pwd
+	@cp pwd $(PROROOT)/build/bin/pwd
+
+pwd: pwd.c
+	$(CC) $(CFLAGS) -o pwd pwd.c
+
+clean:
+	@rm -r pwd
+
+.PHONY: build clean
diff --git a/src/cmd/pwd/pwd.c b/src/cmd/pwd/pwd.c
new file mode 100755
index 0000000..d8c4c2a
--- /dev/null
+++ b/src/cmd/pwd/pwd.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define MAXLEN	1024
+
+/* print the current working directory */
+int main(void)
+{
+	char *cwd, i = 1;
+
+	do {
+		size_t size = i * MAXLEN;
+		cwd = (char *)malloc(size);
+		getcwd(cwd, size);
+		if (errno == ERANGE)
+			free((void *)cwd);
+	} while (errno == ERANGE && ++i < 10);
+
+	if (errno == ERANGE) {
+		fprintf(stderr, "pwd: directory name is too large\n");
+		return -1;
+	}
+
+	printf("%s\n", cwd);
+	free((void *)cwd);
+	return 0;
+}
+