Date: Wed, 17 Jul 2013 12:28:49 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r253420 - head/share/examples/kld/syscall/test Message-ID: <201307171228.r6HCSnng075338@svn.freebsd.org>
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Author: glebius Date: Wed Jul 17 12:28:48 2013 New Revision: 253420 URL: http://svnweb.freebsd.org/changeset/base/253420 Log: Improve example, so that it doesn't dump core when example module isn't loaded. Modified: head/share/examples/kld/syscall/test/call.c Modified: head/share/examples/kld/syscall/test/call.c ============================================================================== --- head/share/examples/kld/syscall/test/call.c Wed Jul 17 11:51:24 2013 (r253419) +++ head/share/examples/kld/syscall/test/call.c Wed Jul 17 12:28:48 2013 (r253420) @@ -30,6 +30,7 @@ #include <sys/module.h> #include <sys/syscall.h> +#include <err.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> @@ -37,11 +38,14 @@ int main(int argc __unused, char **argv __unused) { - int syscall_num; + int modid, syscall_num; struct module_stat stat; stat.version = sizeof(stat); - modstat(modfind("sys/syscall"), &stat); + if ((modid = modfind("sys/syscall")) == -1) + err(1, "modfind"); + if (modstat(modid, &stat) != 0) + err(1, "mostat"); syscall_num = stat.data.intval; return syscall (syscall_num); }
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