From 4bdc7f18c524353b3216e8a0ce91663e3a68eb38 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89rico=20Nogueira?= <erico.erc@gmail.com>
Date: Mon, 17 May 2021 23:19:26 -0300
Subject: [PATCH] Initial commit.

Can delete a sequence of files of directories in the command line, no
recursion yet.

Assumes remove(3) is fast and reasonable:

   unlink(); if (errno==EISDIR) rmdir();
---
 .gitignore |  1 +
 Makefile   |  3 +++
 erm.c      | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 erm.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ce8b0d1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+erm
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..99b9393
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,3 @@
+.PHONY: all
+
+all: erm
diff --git a/erm.c b/erm.c
new file mode 100644
index 0000000..5f3b283
--- /dev/null
+++ b/erm.c
@@ -0,0 +1,56 @@
+#include <errno.h>
+#include <stdbool.h>
+#include <stdnoreturn.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+noreturn void usage(int s)
+{
+	puts("erm [-reh] [files]");
+	exit(s);
+}
+
+int main(int argc, char **argv)
+{
+	bool recursive = false;
+	bool stop_at_error = true;
+
+	int opt;
+	while ((opt = getopt(argc, argv, "reh")) != -1) {
+		switch (opt) {
+			case 'r':
+				recursive = true;
+				break;
+			case 'e':
+				stop_at_error = false;
+				break;
+			case 'h':
+				usage(0);
+			default:
+				usage(1);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	int rv = 0;
+	if (recursive) {
+		/* TODO: descend */
+	} else {
+		for (int i = 0; i < argc; i++) {
+			char *path = argv[i];
+			if (remove(path)) {
+				fprintf(stderr, "failed to remove '%s': %s\n", path, strerror(errno));
+				if (stop_at_error) {
+					return 1;
+				} else {
+					rv = 1;
+				}
+			}
+		}
+	}
+
+	return rv;
+}