From b442e375256d93637b38f997a78e330ba4774c43 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 8 Mar 2012 14:14:22 +1030 Subject: failtest: don't assume FD_SETSIZE is maximum runtime fd. This breaks when rlimit is less. Unfortunately, valgrind (32 bit x86, 3.7.0.SVN, Ubuntu) fails to set the file limit properly on the test: reducing it to the obvious getrlimit/setrlimit/getrlimit works fine, so leaving diagnostics for another day. Signed-off-by: Rusty Russell (Imported from CCAN commit a85a809bb17af6b6cf6fa31b300c6622f64ee700) Autobuild-User: Rusty Russell Autobuild-Date: Thu Mar 8 06:30:48 CET 2012 on sn-devel-104 --- lib/ccan/failtest/test/run-with-fdlimit.c | 51 +++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 lib/ccan/failtest/test/run-with-fdlimit.c (limited to 'lib/ccan/failtest/test') diff --git a/lib/ccan/failtest/test/run-with-fdlimit.c b/lib/ccan/failtest/test/run-with-fdlimit.c new file mode 100644 index 0000000000..6b4483f07e --- /dev/null +++ b/lib/ccan/failtest/test/run-with-fdlimit.c @@ -0,0 +1,51 @@ +/* Include the C files directly. */ +#include +#include +#include +#include + +int main(void) +{ + int fd, pfd[2], ecode; + struct rlimit lim; + + if (getrlimit(RLIMIT_NOFILE, &lim) != 0) + err(1, "getrlimit RLIMIT_NOFILE fail?"); + + printf("rlimit = %lu/%lu (inf=%lu)\n", + (long)lim.rlim_cur, (long)lim.rlim_max, + (long)RLIM_INFINITY); + lim.rlim_cur /= 2; + if (lim.rlim_cur < 8) + errx(1, "getrlimit limit %li too low", (long)lim.rlim_cur); + if (setrlimit(RLIMIT_NOFILE, &lim) != 0) + err(1, "setrlimit RLIMIT_NOFILE (%li/%li)", + (long)lim.rlim_cur, (long)lim.rlim_max); + + plan_tests(2); + failtest_init(0, NULL); + + if (pipe(pfd)) + abort(); + + fd = failtest_open("run-with-fdlimit-scratch", "run-with_fdlimit.c", 1, + O_RDWR|O_CREAT, 0600); + if (fd == -1) { + /* We are the child: write error code for parent to check. */ + ecode = errno; + if (write(pfd[1], &ecode, sizeof(ecode)) != sizeof(ecode)) + abort(); + failtest_exit(0); + } + + /* Check child got correct errno. */ + ok1(read(pfd[0], &ecode, sizeof(ecode)) == sizeof(ecode)); + ok1(ecode == EACCES); + + /* Clean up. */ + failtest_close(fd, "run-open.c", 1); + close(pfd[0]); + close(pfd[1]); + + return exit_status(); +} -- cgit