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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [sim/] [testsuite/] [sim/] [cris/] [c/] [pipe6.c] - Rev 308
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/* Check that writing an inordinate amount of data works (somewhat). #notarget: cris*-*-elf #output: got: a\nexit: 0\n This test-case will *not* work on host (or for real): the first pipemax+1 bytes will be successfully written. It's just for exercising a rare execution path. */ #include <stddef.h> #include <stdlib.h> #include <stdio.h> #include <limits.h> #include <unistd.h> #include <sched.h> #include <signal.h> #include <errno.h> #include <sys/types.h> #include <sys/wait.h> int pip[2]; int pipemax; int process (void *arg) { char *s = arg; char *buf = calloc (pipemax * 100, 1); int ret; if (buf == NULL) abort (); *buf = *s; ret = write (pip[1], buf, pipemax * 100); if (ret != -1 || errno != EFBIG) { perror ("write"); abort (); } return 0; } int main (void) { int retcode; int pid; int st = 0; long stack[16384]; char buf[1]; retcode = pipe (pip); if (retcode != 0) { fprintf (stderr, "Bad pipe %d\n", retcode); abort (); } #ifdef PIPE_MAX pipemax = PIPE_MAX; #else pipemax = fpathconf (pip[1], _PC_PIPE_BUF); #endif if (pipemax <= 0) { fprintf (stderr, "Bad pipemax %d\n", pipemax); abort (); } pid = clone (process, (char *) stack + sizeof (stack) - 64, (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND) | SIGCHLD, "ab"); if (pid <= 0) { fprintf (stderr, "Bad clone %d\n", pid); abort (); } while ((retcode = read (pip[0], buf, 1)) == 0) ; if (retcode != 1) { fprintf (stderr, "Bad read 1: %d\n", retcode); abort (); } printf ("got: %c\n", buf[0]); if (close (pip[0]) != 0) { perror ("pip close"); abort (); } retcode = waitpid (pid, &st, __WALL); if (retcode != pid || !WIFEXITED (st)) { fprintf (stderr, "Bad wait %d:%d %x\n", pid, retcode, st); perror ("errno"); abort (); } printf ("exit: %d\n", WEXITSTATUS (st)); return 0; }
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