Re: [libvirt] [PATCH v5 15/20] tests: Extend command test to transfer large data to process on multiple fds

Add a test case to commandtest.c to test the transfer of data to a process who received the read-end of pipes' file descriptors. Transfer large (128 kb) byte streams. Extend the commandhelper.c with support for --readfd <fd> command line parameter and convert the data receive loop to use poll and receive data on multiple file descriptors (up to 3) and read data into distinct buffers that we grow while adding more (string) data. Signed-off-by: Stefan Berger <stefanb(a)linux.ibm.com&gt; --- tests/commandhelper.c | 70 +++++++++++++++++++++++--- tests/commandtest.c | 113 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 177 insertions(+), 6 deletions(-)

@@ -62,13 +63,27 @@ int main(int argc, char **argv) { char *cwd; FILE *log = fopen(abs_builddir "/commandhelper.log", "w"); int ret = EXIT_FAILURE; + int readfds[3] = { STDIN_FILENO, }; + int numreadfds = 1; + struct pollfd fds[3]; + int numpollfds = 0;

+ char *buffers[3] = {NULL, NULL, NULL}; + size_t buflen[3] = {0, 0, 0}; + char c;