vendor/kyua/0.13-a685f91vendor/kyua

1 files changed, 92 insertions, 0 deletions

diff --git a/m4/signals.m4 b/m4/signals.m4
new file mode 100644
index 000000000000..8e8b56e1eb73
--- /dev/null
+++ b/m4/signals.m4
@@ -0,0 +1,92 @@
+dnl Copyright 2010 The Kyua Authors.
+dnl All rights reserved.
+dnl
+dnl Redistribution and use in source and binary forms, with or without
+dnl modification, are permitted provided that the following conditions are
+dnl met:
+dnl
+dnl * Redistributions of source code must retain the above copyright
+dnl   notice, this list of conditions and the following disclaimer.
+dnl * Redistributions in binary form must reproduce the above copyright
+dnl   notice, this list of conditions and the following disclaimer in the
+dnl   documentation and/or other materials provided with the distribution.
+dnl * Neither the name of Google Inc. nor the names of its contributors
+dnl   may be used to endorse or promote products derived from this software
+dnl   without specific prior written permission.
+dnl
+dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+dnl "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+dnl OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+dnl SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+dnl LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+dnl DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+dnl THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+dnl OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+dnl
+dnl KYUA_LAST_SIGNO
+dnl
+dnl Detect the last valid signal number.
+dnl
+AC_DEFUN([KYUA_LAST_SIGNO], [
+    AC_CACHE_CHECK(
+        [for the last valid signal],
+        [kyua_cv_signals_lastno], [
+        AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <err.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdio.h>
+#include <stdlib.h>], [
+    static const int max_signals = 256;
+    int i;
+    FILE *f;
+
+    i = 0;
+    while (i < max_signals) {
+        i++;
+        if (i != SIGKILL && i != SIGSTOP) {
+            struct sigaction sa;
+            int ret;
+
+            sa.sa_handler = SIG_DFL;
+            sigemptyset(&sa.sa_mask);
+            sa.sa_flags = 0;
+
+            ret = sigaction(i, &sa, NULL);
+            if (ret == -1) {
+                warn("sigaction(%d) failed", i);
+                if (errno == EINVAL) {
+                    i--;
+                    break;
+                } else
+                    err(EXIT_FAILURE, "sigaction failed");
+            }
+        }
+    }
+    if (i == max_signals)
+        errx(EXIT_FAILURE, "too many signals");
+
+    f = fopen("conftest.cnt", "w");
+    if (f == NULL)
+        err(EXIT_FAILURE, "failed to open file");
+
+    fprintf(f, "%d\n", i);
+    fclose(f);
+
+    return EXIT_SUCCESS;
+])],
+        [if test ! -f conftest.cnt; then
+             kyua_cv_signals_lastno=15
+         else
+             kyua_cv_signals_lastno=$(cat conftest.cnt)
+             rm -f conftest.cnt
+         fi],
+        [kyua_cv_signals_lastno=15])
+    ])
+    AC_DEFINE_UNQUOTED([LAST_SIGNO], [${kyua_cv_signals_lastno}],
+                       [Define to the last valid signal number])
+])