remove scanf dependency from getaddrinfo /etc/services support

[musl] / src / network / getaddrinfo.c

diff --git a/src/network/getaddrinfo.c b/src/network/getaddrinfo.c
index d16b656..8386216 100644 (file)
--- a/src/network/getaddrinfo.c
+++ b/src/network/getaddrinfo.c
@@ -79,18 +79,17 @@ int getaddrinfo(const char *host, const char *serv, const struct addrinfo *hint,
                if (!*z && port > 65535) return EAI_SERVICE;
                if (!port) {
                        size_t servlen = strlen(serv);
-                       char protname[4];
+                       char *end = line;
 
                        if (flags & AI_NUMERICSERV) return EAI_SERVICE;
 
                        f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf);
                        if (!f) return EAI_SERVICE;
                        while (fgets(line, sizeof line, f)) {
-                               if (strncmp(line, serv, servlen))
+                               if (strncmp(line, serv, servlen) || !isspace(line[servlen]))
                                        continue;
-                               if (sscanf(line+servlen, "%lu/%3s", &port, protname) < 2)
-                                       continue;
-                               if (strcmp(protname, proto==IPPROTO_UDP ? "udp" : "tcp"))
+                               port = strtoul(line+servlen, &end, 10);
+                               if (strncmp(end, proto==IPPROTO_UDP ? "/udp" : "/tcp", 4))
                                        continue;
                                break;
                        }