From bc2b876ae20675d2673f5b57db10ddc99c063e63 Mon Sep 17 00:00:00 2001
From: Nathan Wagner <nw@hydaspes.if.org>
Date: Sat, 16 Feb 2019 09:27:20 +0000
Subject: [PATCH] add option to determine name from url

---
 src/fetchurl.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

diff --git a/src/fetchurl.c b/src/fetchurl.c
index 3a9436b..9d52696 100644
--- a/src/fetchurl.c
+++ b/src/fetchurl.c
@@ -508,6 +508,37 @@ static void fake_header(struct io *io, int fd) {
 	tls_buffer_append(hdr, "\r\n", 2);
 }
 
+char *pathlast(char *path) {
+	char *last = 0;
+	size_t len = 0;
+
+	if (path == 0) {
+		return 0;
+	}
+
+	while (*path == '/') {
+		path++;
+	}
+
+	do {
+		last = path;
+		len = 0;
+		while (*path && *path != '/') {
+			path++;
+			len++;
+		}
+		while (*path == '/') {
+			path++;
+		}
+	} while (*path);
+
+	if (len == 0) {
+		return 0;
+	}
+
+	return strndup(last, len);
+}
+
 int main(int ac, char *av[]) {
 	int sockfd, port = -1, rv;
 	ssize_t ret;
@@ -536,13 +567,14 @@ int main(int ac, char *av[]) {
 	size_t header_len;
 	char *url = 0;
 	int redirs = 0, redirlimit = 50, printstatus = 0;
-	int verifypolicy = 1;
+	int verifypolicy = 1, calcoutfile = 0;
 
 	ltc_mp = tfm_desc;
 
-	while ((option = getopt(ac, av, "o:rIfz:#R:SkK")) != -1) {
+	while ((option = getopt(ac, av, "o:OrIfz:#R:SkK")) != -1) {
 		switch (option) {
 			case 'o': outfile = optarg; break;
+			case 'O': calcoutfile = 1; break;
 			case 'S': printstatus = 1; head = 1; break;
 			case 'k': verifypolicy = 0; break;
 			case 'K': verifypolicy = 2; break;
@@ -586,6 +618,19 @@ int main(int ac, char *av[]) {
 		exit(EXIT_FAILURE);
 	}
 
+	if (calcoutfile && !outfile) {
+		tls_parse_uri(url, &uri);
+		outfile = pathlast(uri.path);
+		/* outfile leaks memory here, so if this
+		 * were turned into a library function,
+		 * we'd need to track it
+		 */
+		if (!outfile) {
+			fprintf(stderr, "unable to determine outfile\n");
+			exit(EXIT_FAILURE);
+		}
+	}
+
 	if (outfile) {
 		out = open(outfile, O_WRONLY|O_CREAT, 0600);
 		if (out == -1) {
@@ -609,6 +654,7 @@ int main(int ac, char *av[]) {
 		port = atoi(uri.port);
 		req_file = uri.path;
 
+
 		/* construct request */
 		if (head) {
 			tls_buffer_append(&request, "HEAD ", 5);
-- 
2.40.0