commit f270548637fc35b5b9576bd91ac1bdcbffb1f039
from: Christian Weisgerber <naddy@mips.inka.de>
date: Sun May 30 15:37:51 2021 UTC

dial_git(): fix memory leak and simplify

Simplify dial_git() by formatting the initial Git protocol packet
with dprintf, suggested by millert, and stop leaking an asprintf
buffer.
ok stsp

commit - 57c181985845591d1fcd97be660feb8e256fd4be
commit + f270548637fc35b5b9576bd91ac1bdcbffb1f039
blob - b581bbe3e8fc97d4d3215bc948d761fa9c4135e9
blob + 0c3e36643b33aa891a6ae0ca06eac2c739842c4c
--- lib/fetch.c
+++ lib/fetch.c
@@ -156,8 +156,8 @@ dial_git(int *fetchfd, const char *host, const char *p
 {
 	const struct got_error *err = NULL;
 	struct addrinfo hints, *servinfo, *p;
-	char *cmd = NULL, *pkt = NULL;
-	int fd = -1, totlen, r, eaicode;
+	char *cmd = NULL;
+	int fd = -1, len, r, eaicode;
 
 	*fetchfd = -1;
 
@@ -190,31 +190,15 @@ dial_git(int *fetchfd, const char *host, const char *p
 		goto done;
 
 	if (asprintf(&cmd, "git-%s-pack %s", direction, path) == -1) {
-		err = got_error_from_errno("asprintf");
-		goto done;
-	}
-	totlen = 4 + strlen(cmd) + 1 + strlen("host=") + strlen(host) + 1;
-	if (asprintf(&pkt, "%04x%s", totlen, cmd) == -1) {
-		err = got_error_from_errno("asprintf");
-		goto done;
-	}
-	r = write(fd, pkt, strlen(pkt) + 1);
-	if (r == -1) {
-		err = got_error_from_errno("write");
-		goto done;
-	}
-	if (asprintf(&pkt, "host=%s", host) == -1) {
 		err = got_error_from_errno("asprintf");
 		goto done;
 	}
-	r = write(fd, pkt, strlen(pkt) + 1);
-	if (r == -1) {
-		err = got_error_from_errno("write");
-		goto done;
-	}
+	len = 4 + strlen(cmd) + 1 + strlen("host=") + strlen(host) + 1;
+	r = dprintf(fd, "%04x%s%chost=%s%c", len, cmd, '\0', host, '\0');
+	if (r < 0)
+		err = got_error_from_errno("dprintf");
 done:
 	free(cmd);
-	free(pkt);
 	if (err) {
 		if (fd != -1)
 			close(fd);