Dmitry V. Levin
77a1b6bc41
* tests/pselect6.c: New file. * tests/pselect6.test: New test. * tests/Makefile.am (check_PROGRAMS): Add pselect6. (TESTS): Add pselect6.test. * tests/.gitignore: Add pselect6.
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* Based on test by Dr. David Alan Gilbert <dave@treblig.org>
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/select.h>
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#ifndef NSIG
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# warning NSIG is not defined, using 32
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# define NSIG 32
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#endif
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static fd_set set[3][0x1000000 / sizeof(fd_set)];
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int main(int ac, char **av)
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{
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int fds[2];
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struct timespec timeout = { .tv_sec = 0, .tv_nsec = 100 };
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, SIGHUP);
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sigaddset(&mask, SIGCHLD);
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assert(pipe(fds) == 0);
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/*
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* Start with a nice simple pselect.
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*/
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FD_SET(fds[0], set[0]);
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FD_SET(fds[1], set[0]);
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FD_SET(fds[0], set[1]);
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FD_SET(fds[1], set[1]);
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FD_SET(1, set[2]);
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FD_SET(2, set[2]);
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assert(pselect(fds[1] + 1, set[0], set[1], set[2], NULL, NULL) == 1);
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printf("pselect6(%d, [%d %d], [%d %d], [1 2], NULL, {NULL, %u}) "
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"= 1 (out [%d])\n",
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fds[1] + 1, fds[0], fds[1],
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fds[0], fds[1],
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NSIG / 8, fds[1]);
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/*
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* Now the crash case that trinity found, negative nfds
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* but with a pointer to a large chunk of valid memory.
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*/
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FD_ZERO(set[0]);
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FD_SET(fds[1],set[0]);
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assert(pselect(-1, NULL, set[0], NULL, NULL, &mask) == -1);
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printf("pselect6(-1, NULL, %p, NULL, NULL, {[HUP CHLD], %u}) "
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"= -1 EINVAL (Invalid argument)\n", set[0], NSIG / 8);
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/*
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* Another variant, with nfds exceeding FD_SETSIZE limit.
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*/
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FD_ZERO(set[0]);
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FD_SET(fds[0],set[0]);
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FD_ZERO(set[1]);
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assert(pselect(FD_SETSIZE + 1, set[0], set[1], NULL, &timeout, &mask) == 0);
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printf("pselect6(%d, [%d], [], NULL, {0, 100}, {[HUP CHLD], %u}) "
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"= 0 (Timeout)\n", FD_SETSIZE + 1, fds[0], NSIG / 8);
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puts("+++ exited with 0 +++");
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return 0;
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}
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