From a2fae4ab76941c59b8a60d4cbba46f7ae346a69d Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Tue, 24 Oct 2023 20:23:32 +0300
Subject: [PATCH] mktemp

---
 TODO               |  3 +-
 coreutils/mktemp.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++
 coreutils/rm.c     |  5 ++-
 3 files changed, 98 insertions(+), 4 deletions(-)
 create mode 100644 coreutils/mktemp.c

diff --git a/TODO b/TODO
index c9d93d2..de5b049 100644
--- a/TODO
+++ b/TODO
@@ -1,8 +1,6 @@
 With "micro-" prefix
 
 *Todo:
-mktemp
-ln
 nice
 renice
 nohup
@@ -12,6 +10,7 @@ split
 truncate
 date
 tee
+ln
 tr
 cut
 shuf
diff --git a/coreutils/mktemp.c b/coreutils/mktemp.c
new file mode 100644
index 0000000..89626a1
--- /dev/null
+++ b/coreutils/mktemp.c
@@ -0,0 +1,94 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+
+int make_temp_dir(char *tmp) {
+	if (!mkdtemp(tmp)) {
+		if (errno == EINVAL)
+			fprintf(stderr, "mktemp: template does not end in exactly 'XXXXX': %s\n", tmp);
+
+		else
+			fprintf(stderr, "mktemp: %s\n", strerror(errno));
+
+		return 1;
+	}
+
+	return 0;
+}
+
+int get_suffix(const char *str) {
+	size_t len = strlen(str);
+	for (size_t i = len - 1; i >= 0; i--)
+		if (str[i] == 'X')
+			return len - i - 1;
+
+	exit(1);
+}
+
+int make_temp_file(char *tmp) {
+	if (!strstr(tmp, "XXXXXX")) {
+		fprintf(stderr, "mktemp: too few X's in template: %s\n", tmp);
+		return 1;
+	}
+
+	int fd = mkstemps(tmp, get_suffix(tmp));
+	if (fd < 0) {
+		fprintf(stderr, "mktemp: %s\n", strerror(errno));
+		return 1;
+	}
+
+	close(fd);
+	return 0;
+}
+
+int main(const int argc, char **argv) {
+	unsigned int d_flag = 0;
+
+	int i;
+	for (i = 1; i < argc; i++) {
+		if (argv[i][0] != '-')
+			break;
+
+		else if (!strcmp(argv[i], "-d"))
+			d_flag = 1;
+
+		else if (!strcmp(argv[i], "--help")) {
+			printf("mktemp [-d] [file]\n");
+			return 0;
+		}
+	}
+
+	if (argc - i == 0) {
+		fprintf(stderr, "mktemp: missing operand\n");
+		return 1;
+	}
+
+	if (argc - 1 > i) {
+		fprintf(stderr, "mktemp: extra operands\n");
+		return 1;
+	}
+
+	char *path = getenv("TMPDIR");
+	if (!path || path[0] == '\0')
+		path = "/tmp";
+
+	if (chdir(path)) {
+		fprintf(stderr, "mktemp: %s\n", strerror(errno));
+		return 1;
+	}
+
+	if (d_flag) {
+		if (make_temp_dir(argv[i]))
+			return 1;
+	}
+
+	else {
+		if (make_temp_file(argv[i]))
+			return 1;
+	}
+
+	printf("%s/%s\n", path, argv[i]);
+	return 0;
+}
diff --git a/coreutils/rm.c b/coreutils/rm.c
index f513c5a..cfaddc0 100644
--- a/coreutils/rm.c
+++ b/coreutils/rm.c
@@ -64,15 +64,16 @@ int main(const int argc, char **argv) {
 		return 0;
 	}
 
+	int status = 0;
 	for (int i = 1; i < argc; i++) {
 		if (argv[i][0] == '-')
 			continue;
 
 		int status = rmtree(argv[i]);
 		if (status != 0)
-			return status;
+			status = 1;
 	}
 
-	return 0;
+	return status;
 }