closefrom: Close all file descriptors above a certain value.

[ccan] / tools / configurator / configurator.c

diff --git a/tools/configurator/configurator.c b/tools/configurator/configurator.c
index c0598509b8c0fa677ea426ab11e8b2a674f12838..57779f29905b68d82e537e8c4f0c49c2d282ebec 100644 (file)
--- a/tools/configurator/configurator.c
+++ b/tools/configurator/configurator.c
@@ -498,6 +498,43 @@ static const struct test base_tests[] = {
          "     return __builtin_cpu_supports(\"mmx\");\n"
          "}"
        },
+       { "HAVE_CLOSEFROM", "closefrom() offered by system",
+         "DEFINES_EVERYTHING", NULL, NULL,
+         "#include <stdlib.h>\n"
+         "#include <unistd.h>\n"
+         "int main(void) {\n"
+         "    closefrom(STDERR_FILENO + 1);\n"
+         "    return 0;\n"
+         "}\n"
+       },
+       { "HAVE_F_CLOSEM", "F_CLOSEM defined for fctnl.",
+         "DEFINES_EVERYTHING", NULL, NULL,
+         "#include <fcntl.h>\n"
+         "#include <unistd.h>\n"
+         "int main(void) {\n"
+         "    int res = fcntl(STDERR_FILENO + 1, F_CLOSEM, 0);\n"
+         "    return res < 0;\n"
+         "}\n"
+       },
+       { "HAVE_NR_CLOSE_RANGE", "close_range syscall available as __NR_close_range.",
+         "DEFINES_EVERYTHING", NULL, NULL,
+         "#include <limits.h>\n"
+         "#include <sys/syscall.h>\n"
+         "#include <unistd.h>\n"
+         "int main(void) {\n"
+         "    int res = syscall(__NR_close_range, STDERR_FILENO + 1, INT_MAX, 0);\n"
+         "    return res < 0;\n"
+         "}\n"
+       },
+       { "HAVE_F_MAXFD", "F_MAXFD defined for fcntl.",
+         "DEFINES_EVERYTHING", NULL, NULL,
+         "#include <fcntl.h>\n"
+         "#include <unistd.h>\n"
+         "int main(void) {\n"
+         "    int res = fcntl(0, F_MAXFD);\n"
+         "    return res < 0;\n"
+         "}\n"
+       },
 };
 
 static void c12r_err(int eval, const char *fmt, ...)