Added basename

1 files changed, 83 insertions, 0 deletions

diff --git a/basename/basename.c b/basename/basename.c
new file mode 100644
index 0000000..83f3b8f
--- /dev/null
+++ b/basename/basename.c
@@ -0,0 +1,83 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+char	*g_name = "basename";
+
+void	fatal(char *message)
+{
+	fprintf(stderr, "%s: %s\n", g_name, message);
+	exit(EXIT_FAILURE);
+}
+
+char	*truncate_path(char *s, char *suffix)
+{
+	if (*s == '\0')
+		return s;
+
+	size_t last = strlen(s) - 1;
+	while (s[last] == '/' && last != 0)
+	{
+		s[last] = '\0';
+		last--;
+	}
+
+	char *last_slash = strrchr(s, '/');
+	if (last_slash != NULL && last_slash != s)
+		s = last_slash + 1;
+
+	if (suffix != NULL)
+	{
+		char *end = s + strlen(s) - strlen(suffix);
+		if (end > s && strcmp(end, suffix) == 0)
+			*end = '\0';
+	}
+	return s;
+}
+
+int		main(int argc, char **argv)
+{
+	int		option;
+	char	*suffix = NULL;
+	bool	multiple = false;
+	char	line_delim = '\n';
+
+	g_name = argv[0];
+	while ((option = getopt(argc, argv, "as:z")) != -1)
+	{
+		switch (option)
+		{
+			case 's':
+				suffix = optarg;
+			case 'a':
+				multiple = true;
+				break;
+			case 'z':
+				line_delim = '\0';
+				break;
+			default:
+				return EXIT_FAILURE;
+		}
+	}
+
+	if (optind == argc)
+		fatal("missing operand");
+
+	if (!multiple)
+	{
+		argv[optind] = truncate_path(argv[optind], argv[optind + 1]);
+		fputs(argv[optind], stdout);
+		putchar(line_delim);
+		return EXIT_SUCCESS;
+	}
+
+	for (; optind < argc; optind++)
+	{
+		argv[optind] = truncate_path(argv[optind], suffix);
+		fputs(argv[optind], stdout);
+		putchar(line_delim);
+	}
+	return EXIT_SUCCESS;
+}