format-patch: fix two-argument special case, and make it easier to pick single commits

diff --git a/ident.c b/ident.c
index 06d0e6cbd381f1598ba39a7fbfc7602249f60b11..bc89e1d04c63563c051005754a50247f22256974 100644 (file)
--- a/ident.c
+++ b/ident.c
@@ -8,6 +8,7 @@
 #include "cache.h"
 
 #include <pwd.h>
+#include <netdb.h>
 
 static char git_default_date[50];
 
@@ -64,9 +65,16 @@ int setup_ident(void)
        git_default_email[len++] = '@';
        gethostname(git_default_email + len, sizeof(git_default_email) - len);
        if (!strchr(git_default_email+len, '.')) {
+               struct hostent *he = gethostbyname(git_default_email + len);
+               char *domainname;
+
                len = strlen(git_default_email);
                git_default_email[len++] = '.';
-               getdomainname(git_default_email+len, sizeof(git_default_email)-len);
+               if (he && (domainname = strchr(he->h_name, '.')))
+                       strncpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len);
+               else
+                       strncpy(git_default_email + len, "(none)", sizeof(git_default_email) - len);
+               git_default_email[sizeof(git_default_email) - 1] = 0;
        }
        /* And set the default date */
        datestamp(git_default_date, sizeof(git_default_date));