1 files changed, 130 insertions, 0 deletions
diff --git a/rm/rm.c b/rm/rm.c
new file mode 100644
index 0000000..2bcf68f
--- /dev/null
+++ b/rm/rm.c
@@ -0,0 +1,130 @@
+#define _POSIX_C_SOURCE 200112L
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+typedef enum
+{
+	FLAG_FORCE            = 1 << 0,
+	FLAG_INTERACTIVE      = 1 << 1,
+	/* FLAG_INTERACTIVE_ONCE = 1 << 2, */ // TODO
+	FLAG_RECURSIVE        = 1 << 3,
+	FLAG_DIRECTORY        = 1 << 4,
+	FLAG_VERBOSE          = 1 << 5,
+}	t_flags;
+
+char	*g_name = "rm";
+
+void	log_errno(char *path)
+{
+	fprintf(stderr, "%s: cannot remove '%s': %s\n", g_name, path, strerror(errno));
+}
+
+void	fatal_errno(char *path)
+{
+	log_errno(path);
+	exit(EXIT_FAILURE);
+}
+
+int		rm_file(char *path, t_flags flags)
+{
+	struct stat	statbuf;
+	char		recursive_path[PATH_MAX + 1] = {'\0'};
+
+	if (lstat(path, &statbuf) == -1)
+		fatal_errno(path);
+	if (flags & FLAG_INTERACTIVE
+		|| (!(flags & FLAG_FORCE)
+		&& !((statbuf.st_mode & S_IWUSR && statbuf.st_uid == getuid()) ||
+			 (statbuf.st_mode & S_IWGRP && statbuf.st_gid == getgid()) ||
+			  statbuf.st_mode & S_IWOTH)))
+	{
+		printf("%s: remove regular file '%s'? ", g_name, path);
+		if (tolower(getchar()) != 'y')
+			return 0;
+	}
+
+	if (S_ISDIR(statbuf.st_mode) && flags & FLAG_RECURSIVE)
+	{
+		DIR				*directory;
+		struct dirent	*entry;
+
+		if ((directory = opendir(path)) == NULL)
+		{
+			log_errno(path);
+			return 0;
+		}
+		strcpy(recursive_path, path);
+		if (path[strlen(path) - 1] != '/')
+			strcat(recursive_path, "/");
+		while ((entry = readdir(directory)) != NULL)
+		{
+			if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
+				continue;
+			strcat(recursive_path, entry->d_name);
+			rm_file(recursive_path, flags);
+			strrchr(recursive_path, '/')[1] = '\0';
+		}
+		closedir(directory);
+		if (rmdir(path) == -1)
+			log_errno(path);
+		else if (flags & FLAG_VERBOSE)
+			printf("removed directory '%s'\n", path);
+	}
+	else if (S_ISDIR(statbuf.st_mode) && flags & FLAG_DIRECTORY)
+	{
+		if (rmdir(path) == -1)
+			log_errno(path);
+		else if (flags & FLAG_VERBOSE)
+			printf("removed directory '%s'\n", path);
+	}
+	else
+	{
+		if (unlink(path) == -1)
+			log_errno(path);
+		else if (flags & FLAG_VERBOSE)
+			printf("removed '%s'\n", path);
+	}
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	if (argc == 1)
+	{
+		fprintf(stderr, "%s: missing operand\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+	g_name = argv[0];
+
+	int		option;
+	t_flags	flags = 0;
+
+	while ((option = getopt(argc, argv, "firRdv")) != -1)
+	{
+		switch (option)
+		{
+			case 'f': flags |= FLAG_FORCE;            break;
+			case 'i': flags |= FLAG_INTERACTIVE;      break;
+			/* case 'I': flags |= FLAG_INTERACTIVE_ONCE; break; */
+			case 'd': flags |= FLAG_DIRECTORY;        break;
+			case 'v': flags |= FLAG_VERBOSE;          break;
+
+			case 'r':
+			case 'R':
+				flags |=  FLAG_RECURSIVE; break;
+				break;
+		}
+	}
+
+	for (; optind < argc; optind++)
+		rm_file(argv[optind], flags);
+	return EXIT_SUCCESS;
+}