Make setgroups(3) function optional

For example, Interix is missing this function, which prevented
ngIRCd to build on this platform. When setgroups(3) isn't available,
a warning message is issued when ngIRCd starts up.

diff --git a/configure.ng b/configure.ng
index bd40694f3ccdef563aefa32803a2941b4cab1564..34094a485180cc9874085daf4d45a2b8ae31aefb 100644 (file)
--- a/configure.ng
+++ b/configure.ng
@@ -221,8 +221,8 @@ AC_CHECK_FUNCS([ \
 # Optional functions
 AC_CHECK_FUNCS_ONCE([
        arc4random arc4random_stir gai_strerror getnameinfo inet_aton \
-       sigaction sigprocmask snprintf vsnprintf strdup strndup strlcpy strlcat \
-       strtok_r unsetenv waitpid])
+       setgroups sigaction sigprocmask snprintf strdup strlcat strlcpy \
+       strndup strtok_r unsetenv vsnprintf waitpid])
 
 WORKING_GETADDRINFO
 

diff --git a/src/ngircd/ngircd.c b/src/ngircd/ngircd.c
index 1b20597d8aa26cf7dbd0c2e490786ea910bab8d5..0e8acb54213e3a3c6e54e99affdf0b9bfed22871 100644 (file)
--- a/src/ngircd/ngircd.c
+++ b/src/ngircd/ngircd.c
@@ -724,6 +724,7 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                        if (real_errno != EPERM) 
                                goto out;
                }
+#ifdef HAVE_SETGROUPS
                if (setgroups(0, NULL) != 0) {
                        real_errno = errno;
                        Log(LOG_ERR, "Can't drop supplementary group IDs: %s!",
@@ -731,6 +732,10 @@ NGIRCd_Init(bool NGIRCd_NoDaemon)
                        if (real_errno != EPERM)
                                goto out;
                }
+#else
+               Log(LOG_WARNING,
+                   "Can't drop supplementary group IDs: setgroups(3) missing!");
+#endif
        }
 #endif