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732 lines
20 KiB
732 lines
20 KiB
/* Many of the tests require 1.6.n, n > 16, so we may as well assume that
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* POSIX signals are implemented.
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*/
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#define SIGACTION
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/* test38: read(), write() Author: Jan-Mark Wams (jms@cs.vu.nl) */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <errno.h>
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#include <time.h>
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#include <signal.h>
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#include <stdio.h>
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int max_error = 4;
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#include "common.h"
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#define ITERATIONS 3
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#define BUF_SIZE 1024
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#define System(cmd) if (system(cmd) != 0) printf("``%s'' failed\n", cmd)
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#define Chdir(dir) if (chdir(dir) != 0) printf("Can't goto %s\n", dir)
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#define Stat(a,b) if (stat(a,b) != 0) printf("Can't stat %s\n", a)
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int superuser;
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int signumber = 0;
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void test38a(void);
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void test38b(void);
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void test38c(void);
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void setsignumber(int _signumber);
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int main(int argc, char *argv[])
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{
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int i, m = 0xFFFF;
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sync();
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start(38);
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if (argc == 2) m = atoi(argv[1]);
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superuser = (geteuid() == 0);
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umask(0000);
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for (i = 0; i < ITERATIONS; i++) {
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if (m & 0001) test38a();
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if (m & 0002) test38b();
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if (m & 0004) test38c();
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}
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quit();
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return(-1); /* Unreachable */
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}
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void test38a()
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{ /* Try normal operation. */
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int fd1;
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struct stat st1, st2;
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time_t time1;
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char buf[BUF_SIZE];
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int stat_loc;
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int i, j;
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int tube[2];
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subtest = 1;
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System("rm -rf ../DIR_38/*");
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/* Let's open bar. */
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if ((fd1 = open("bar", O_RDWR | O_CREAT, 0777)) != 3) e(1);
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Stat("bar", &st1);
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/* Writing nothing should not affect the file at all. */
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if (write(fd1, "", 0) != 0) e(2);
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Stat("bar", &st2);
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if (st1.st_uid != st2.st_uid) e(3);
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if (st1.st_gid != st2.st_gid) e(4); /* should be same */
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if (st1.st_mode != st2.st_mode) e(5);
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if (st1.st_size != st2.st_size) e(6);
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if (st1.st_nlink != st2.st_nlink) e(7);
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if (st1.st_mtime != st2.st_mtime) e(8);
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if (st1.st_ctime != st2.st_ctime) e(9);
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if (st1.st_atime != st2.st_atime) e(10);
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/* A write should update some status fields. */
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time(&time1);
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while (time1 >= time((time_t *)0))
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;
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if (write(fd1, "foo", 4) != 4) e(11);
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Stat("bar", &st2);
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if (st1.st_mode != st2.st_mode) e(12);
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if (st1.st_size >= st2.st_size) e(13);
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if ((off_t) 4 != st2.st_size) e(14);
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if (st1.st_nlink != st2.st_nlink) e(15);
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if (st1.st_mtime >= st2.st_mtime) e(16);
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if (st1.st_ctime >= st2.st_ctime) e(17);
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if (st1.st_atime != st2.st_atime) e(18);
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/* Lseeks should not change the file status. */
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if (lseek(fd1, (off_t) - 2, SEEK_END) != 2) e(19);
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Stat("bar", &st1);
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if (st1.st_mode != st2.st_mode) e(20);
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if (st1.st_size != st2.st_size) e(21);
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if (st1.st_nlink != st2.st_nlink) e(22);
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if (st1.st_mtime != st2.st_mtime) e(23);
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if (st1.st_ctime != st2.st_ctime) e(24);
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if (st1.st_atime != st2.st_atime) e(25);
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/* Writing should start at the current (2) position. */
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if (write(fd1, "foo", 4) != 4) e(26);
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Stat("bar", &st2);
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if (st1.st_mode != st2.st_mode) e(27);
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if (st1.st_size >= st2.st_size) e(28);
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if ((off_t) 6 != st2.st_size) e(29);
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if (st1.st_nlink != st2.st_nlink) e(30);
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if (st1.st_mtime > st2.st_mtime) e(31);
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if (st1.st_ctime > st2.st_ctime) e(32);
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if (st1.st_atime != st2.st_atime) e(33);
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/* A read of zero bytes should not affect anything. */
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if (read(fd1, buf, 0) != 0) e(34);
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Stat("bar", &st1);
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if (st1.st_uid != st2.st_uid) e(35);
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if (st1.st_gid != st2.st_gid) e(36); /* should be same */
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if (st1.st_mode != st2.st_mode) e(37);
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if (st1.st_size != st2.st_size) e(38);
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if (st1.st_nlink != st2.st_nlink) e(39);
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if (st1.st_mtime != st2.st_mtime) e(40);
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if (st1.st_ctime != st2.st_ctime) e(41);
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if (st1.st_atime != st2.st_atime) e(42);
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/* The file now should contain ``fofoo\0'' Let's check that. */
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if (lseek(fd1, (off_t) 0, SEEK_SET) != 0) e(43);
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if (read(fd1, buf, BUF_SIZE) != 6) e(44);
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if (strcmp(buf, "fofoo") != 0) e(45);
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/* Only the Access Time should be updated. */
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Stat("bar", &st2);
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if (st1.st_mtime != st2.st_mtime) e(46);
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if (st1.st_ctime != st2.st_ctime) e(47);
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if (st1.st_atime >= st2.st_atime) e(48);
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/* A read of zero bytes should do nothing even at the end of the file. */
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time(&time1);
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while (time1 >= time((time_t *)0))
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;
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if (read(fd1, buf, 0) != 0) e(49);
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Stat("bar", &st1);
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if (st1.st_size != st2.st_size) e(50);
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if (st1.st_mtime != st2.st_mtime) e(51);
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if (st1.st_ctime != st2.st_ctime) e(52);
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if (st1.st_atime != st2.st_atime) e(53);
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/* Reading should be done from the current offset. */
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if (read(fd1, buf, BUF_SIZE) != 0) e(54);
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if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(55);
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if (read(fd1, buf, BUF_SIZE) != 4) e(56);
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if (strcmp(buf, "foo") != 0) e(57);
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/* Reading should effect the current file position. */
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if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(58);
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if (read(fd1, buf, 1) != 1) e(59);
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if (*buf != 'f') e(60);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 3) e(61);
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if (read(fd1, buf, 1) != 1) e(62);
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if (*buf != 'o') e(63);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 4) e(64);
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if (read(fd1, buf, 1) != 1) e(65);
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if (*buf != 'o') e(66);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 5) e(67);
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if (read(fd1, buf, 1) != 1) e(68);
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if (*buf != '\0') e(69);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(70);
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/* Read's at EOF should return 0. */
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if (read(fd1, buf, BUF_SIZE) != 0) e(71);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(72);
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if (read(fd1, buf, BUF_SIZE) != 0) e(73);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(74);
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if (read(fd1, buf, BUF_SIZE) != 0) e(75);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(76);
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if (read(fd1, buf, BUF_SIZE) != 0) e(77);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(78);
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if (read(fd1, buf, BUF_SIZE) != 0) e(79);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 6) e(80);
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/* Writing should not always change the file size. */
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if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(81);
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if (write(fd1, "ba", 2) != 2) e(82);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 4) e(83);
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Stat("bar", &st1);
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if (st1.st_size != 6) e(84);
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/* Kill the \0 at the end. */
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if (lseek(fd1, (off_t) 5, SEEK_SET) != 5) e(85);
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if (write(fd1, "x", 1) != 1) e(86);
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/* And close the bar. */
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if (close(fd1) != 0) e(87);
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/* Try some stuff with O_APPEND. Bar contains ``fobaox'' */
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if ((fd1 = open("bar", O_RDWR | O_APPEND)) != 3) e(88);
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/* No matter what the file position is. Writes should append. */
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if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(89);
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if (write(fd1, "y", 1) != 1) e(90);
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Stat("bar", &st1);
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if (st1.st_size != (off_t) 7) e(91);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 7) e(92);
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if (lseek(fd1, (off_t) 2, SEEK_SET) != 2) e(93);
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if (write(fd1, "z", 2) != 2) e(94);
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/* The file should contain ``fobaoxyz\0'' == 9 chars long. */
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Stat("bar", &st1);
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if (st1.st_size != (off_t) 9) e(95);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 9) e(96);
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/* Reading on a O_APPEND flag should be from the current offset. */
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if (lseek(fd1, (off_t) 0, SEEK_SET) != 0) e(97);
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if (read(fd1, buf, BUF_SIZE) != 9) e(98);
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if (strcmp(buf, "fobaoxyz") != 0) e(99);
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if (lseek(fd1, (off_t) 0, SEEK_CUR) != 9) e(100);
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if (close(fd1) != 0) e(101);
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/* Let's test fifo writes. First blocking. */
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if (mkfifo("fifo", 0777) != 0) e(102);
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/* Read from fifo but no writer. */
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System("rm -rf /tmp/sema.38a");
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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if ((fd1 = open("fifo", O_RDONLY)) != 3) e(103);
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system("> /tmp/sema.38a");
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system("while test -f /tmp/sema.38a; do sleep 1; done");
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errno =0;
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if (read(fd1, buf, BUF_SIZE) != 0) e(104);
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if (read(fd1, buf, BUF_SIZE) != 0) e(105);
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if (read(fd1, buf, BUF_SIZE) != 0) e(106);
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if (close(fd1) != 0) e(107);
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exit(0);
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default:
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(108);
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while (stat("/tmp/sema.38a", &st1) != 0) sleep(1);
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if (close(fd1) != 0) e(109);
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unlink("/tmp/sema.38a");
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if (wait(&stat_loc) == -1) e(110);
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if (stat_loc != 0) e(111); /* Alarm? */
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}
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/* Read from fifo should wait for writer. */
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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if ((fd1 = open("fifo", O_RDONLY)) != 3) e(112);
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if (read(fd1, buf, BUF_SIZE) != 10) e(113);
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if (strcmp(buf, "Hi reader") != 0) e(114);
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if (close(fd1) != 0) e(115);
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exit(0);
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default:
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(116);
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sleep(1);
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if (write(fd1, "Hi reader", 10) != 10) e(117);
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if (close(fd1) != 0) e(118);
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if (wait(&stat_loc) == -1) e(119);
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if (stat_loc != 0) e(120); /* Alarm? */
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}
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#if DEAD_CODE
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/* Does this test test what it is supposed to test??? */
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/* Read from fifo should wait for all writers to close. */
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(60);
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(121);
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printf("C2 did open\n");
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if (close(fd1) != 0) e(122);
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printf("C2 did close\n");
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exit(0);
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default:
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printf("C1 scheduled\n");
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(123);
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printf("C1 did open\n");
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sleep(2);
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if (close(fd1) != 0) e(124);
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printf("C1 did close\n");
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sleep(1);
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if (wait(&stat_loc) == -1) e(125);
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if (stat_loc != 0) e(126); /* Alarm? */
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}
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exit(stat_loc);
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default: {
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int wait_status;
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printf("Parent running\n");
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sleep(1); /* open in childs first */
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if ((fd1 = open("fifo", O_RDONLY)) != 3) e(127);
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if (read(fd1, buf, BUF_SIZE) != 0) e(128);
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if (close(fd1) != 0) e(129);
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printf("Parent closed\n");
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if ((wait_status=wait(&stat_loc)) == -1) e(130);
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printf("wait_status %d, stat_loc %d:", wait_status, stat_loc);
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if (WIFSIGNALED(stat_loc)) {
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printf(" killed, signal number %d\n", WTERMSIG(stat_loc));
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}
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else if (WIFEXITED(stat_loc)) {
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printf(" normal exit, status %d\n", WEXITSTATUS(stat_loc));
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}
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if (stat_loc != 0) e(131); /* Alarm? */
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}
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}
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#endif
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/* PIPE_BUF has to have a nice value. */
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if (PIPE_BUF < 5) e(132);
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if (BUF_SIZE < 1000) e(133);
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/* Writes of blocks smaller than PIPE_BUF should be atomic. */
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System("rm -rf /tmp/sema.38b;> /tmp/sema.38b");
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(134);
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for (i = 0; i < 100; i++) write(fd1, "1234 ", 5);
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system("while test -f /tmp/sema.38b; do sleep 1; done");
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if (close(fd1) != 0) e(135);
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exit(0);
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default:
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if ((fd1 = open("fifo", O_WRONLY)) != 3) e(136);
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for (i = 0; i < 100; i++) write(fd1, "1234 ", 5);
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while (stat("/tmp/sema.38b", &st1) == 0) sleep(1);
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if (close(fd1) != 0) e(137);
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if (wait(&stat_loc) == -1) e(138);
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if (stat_loc != 0) e(139); /* Alarm? */
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}
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exit(stat_loc);
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default:
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if ((fd1 = open("fifo", O_RDONLY)) != 3) e(140);
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i = 0;
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memset(buf, '\0', BUF_SIZE);
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/* Read buffer full or till EOF. */
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do {
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j = read(fd1, buf + i, BUF_SIZE - i);
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if (j > 0) {
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if (j % 5 != 0) e(141);
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i += j;
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}
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} while (j > 0 && i < 1000);
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/* Signal the children to close write ends. This should not be */
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/* Necessary. But due to a bug in 1.16.6 this is necessary. */
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unlink("/tmp/sema.38b");
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if (j < 0) e(142);
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if (i != 1000) e(143);
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if (wait(&stat_loc) == -1) e(144);
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if (stat_loc != 0) e(145); /* Alarm? */
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/* Check 200 times 1234. */
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for (i = 0; i < 200; i++)
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if (strncmp(buf + (i * 5), "1234 ", 5) != 0) break;
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if (i != 200) e(146);
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if (buf[1000] != '\0') e(147);
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if (buf[1005] != '\0') e(148);
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if (buf[1010] != '\0') e(149);
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if (read(fd1, buf, BUF_SIZE) != 0) e(150);
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if (close(fd1) != 0) e(151);
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}
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/* Read from pipe should wait for writer. */
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if (pipe(tube) != 0) e(152);
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switch (fork()) {
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case -1: printf("Can't fork\n"); break;
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case 0:
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alarm(20);
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if (close(tube[1]) != 0) e(153);
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if (read(tube[0], buf, BUF_SIZE) != 10) e(154);
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if (strcmp(buf, "Hi reader") != 0) e(155);
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if (close(tube[0]) != 0) e(156);
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exit(0);
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default:
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if (close(tube[0]) != 0) e(157);
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sleep(1);
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if (write(tube[1], "Hi reader", 10) != 10) e(158);
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if (close(tube[1]) != 0) e(159);
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|
if (wait(&stat_loc) == -1) e(160);
|
|
if (stat_loc != 0) e(161); /* Alarm? */
|
|
}
|
|
|
|
/* Read from pipe should wait for all writers to close. */
|
|
if (pipe(tube) != 0) e(162);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
if (close(tube[0]) != 0) e(163);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
if (close(tube[1]) != 0) e(164);
|
|
exit(0);
|
|
default:
|
|
sleep(1);
|
|
if (close(tube[1]) != 0) e(165);
|
|
if (wait(&stat_loc) == -1) e(166);
|
|
if (stat_loc != 0) e(167); /* Alarm? */
|
|
}
|
|
exit(stat_loc);
|
|
default:
|
|
if (close(tube[1]) != 0) e(168);
|
|
if (read(tube[0], buf, BUF_SIZE) != 0) e(169);
|
|
if (close(tube[0]) != 0) e(170);
|
|
if (wait(&stat_loc) == -1) e(171);
|
|
if (stat_loc != 0) e(172); /* Alarm? */
|
|
}
|
|
|
|
/* Writes of blocks smaller than PIPE_BUF should be atomic. */
|
|
System("rm -rf /tmp/sema.38c;> /tmp/sema.38c");
|
|
if (pipe(tube) != 0) e(173);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
if (close(tube[0]) != 0) e(174);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
for (i = 0; i < 100; i++) write(tube[1], "1234 ", 5);
|
|
system("while test -f /tmp/sema.38c; do sleep 1; done");
|
|
if (close(tube[1]) != 0) e(175);
|
|
exit(0);
|
|
default:
|
|
for (i = 0; i < 100; i++) write(tube[1], "1234 ", 5);
|
|
while (stat("/tmp/sema.38c", &st1) == 0) sleep(1);
|
|
if (close(tube[1]) != 0) e(176);
|
|
if (wait(&stat_loc) == -1) e(177);
|
|
if (stat_loc != 0) e(178); /* Alarm? */
|
|
}
|
|
exit(stat_loc);
|
|
default:
|
|
i = 0;
|
|
if (close(tube[1]) != 0) e(179);
|
|
memset(buf, '\0', BUF_SIZE);
|
|
do {
|
|
j = read(tube[0], buf + i, BUF_SIZE - i);
|
|
if (j > 0) {
|
|
if (j % 5 != 0) e(180);
|
|
i += j;
|
|
} else
|
|
break; /* EOF seen. */
|
|
} while (i < 1000);
|
|
unlink("/tmp/sema.38c");
|
|
if (j < 0) e(181);
|
|
if (i != 1000) e(182);
|
|
if (close(tube[0]) != 0) e(183);
|
|
if (wait(&stat_loc) == -1) e(184);
|
|
if (stat_loc != 0) e(185); /* Alarm? */
|
|
|
|
/* Check 200 times 1234. */
|
|
for (i = 0; i < 200; i++)
|
|
if (strncmp(buf + (i * 5), "1234 ", 5) != 0) break;
|
|
if (i != 200) e(186);
|
|
}
|
|
}
|
|
|
|
void test38b()
|
|
{
|
|
int i, fd, stat_loc;
|
|
char buf[BUF_SIZE];
|
|
char buf2[BUF_SIZE];
|
|
struct stat st;
|
|
|
|
subtest = 2;
|
|
System("rm -rf ../DIR_38/*");
|
|
|
|
/* Lets try sequential writes. */
|
|
system("rm -rf /tmp/sema.38d");
|
|
System("> testing");
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
if ((fd = open("testing", O_WRONLY | O_APPEND)) != 3) e(1);
|
|
if (write(fd, "one ", 4) != 4) e(2);
|
|
if (close(fd) != 0) e(3);
|
|
system("> /tmp/sema.38d");
|
|
system("while test -f /tmp/sema.38d; do sleep 1; done");
|
|
if ((fd = open("testing", O_WRONLY | O_APPEND)) != 3) e(4);
|
|
if (write(fd, "three ", 6) != 6) e(5);
|
|
if (close(fd) != 0) e(6);
|
|
system("> /tmp/sema.38d");
|
|
exit(0);
|
|
default:
|
|
while (stat("/tmp/sema.38d", &st) != 0) sleep(1);
|
|
if ((fd = open("testing", O_WRONLY | O_APPEND)) != 3) e(7);
|
|
if (write(fd, "two ", 4) != 4) e(8);
|
|
if (close(fd) != 0) e(9);
|
|
unlink("/tmp/sema.38d");
|
|
while (stat("/tmp/sema.38d", &st) != 0) sleep(1);
|
|
if ((fd = open("testing", O_WRONLY | O_APPEND)) != 3) e(10);
|
|
if (write(fd, "four", 5) != 5) e(11);
|
|
if (close(fd) != 0) e(12);
|
|
if (wait(&stat_loc) == -1) e(13);
|
|
if (stat_loc != 0) e(14); /* The alarm went off? */
|
|
unlink("/tmp/sema.38d");
|
|
}
|
|
if ((fd = open("testing", O_RDONLY)) != 3) e(15);
|
|
if (read(fd, buf, BUF_SIZE) != 19) e(16);
|
|
if (strcmp(buf, "one two three four") != 0) e(17);
|
|
if (close(fd) != 0) e(18);
|
|
|
|
/* Non written bytes in regular files should be zero. */
|
|
memset(buf2, '\0', BUF_SIZE);
|
|
if ((fd = open("bigfile", O_RDWR | O_CREAT, 0644)) != 3) e(19);
|
|
if (lseek(fd, (off_t) 102400, SEEK_SET) != (off_t) 102400L) e(20);
|
|
if (read(fd, buf, BUF_SIZE) != 0) e(21);
|
|
if (write(fd, ".", 1) != 1) e(22);
|
|
Stat("bigfile", &st);
|
|
if (st.st_size != (off_t) 102401) e(23);
|
|
if (lseek(fd, (off_t) 0, SEEK_SET) != 0) e(24);
|
|
for (i = 0; i < 102400 / BUF_SIZE; i++) {
|
|
if (read(fd, buf, BUF_SIZE) != BUF_SIZE) e(25);
|
|
if (memcmp(buf, buf2, BUF_SIZE) != 0) e(26);
|
|
}
|
|
if (close(fd) != 0) e(27);
|
|
}
|
|
|
|
void test38c()
|
|
{ /* Test correct error behavior. */
|
|
char buf[BUF_SIZE];
|
|
int fd, tube[2], stat_loc;
|
|
struct stat st;
|
|
pid_t pid;
|
|
#ifdef SIGACTION
|
|
struct sigaction act, oact;
|
|
#else
|
|
void (*oldfunc) (int);
|
|
#endif
|
|
|
|
subtest = 3;
|
|
System("rm -rf ../DIR_38/*");
|
|
|
|
/* To test if writing processes on closed pipes are signumbered. */
|
|
#ifdef SIGACTION
|
|
act.sa_handler = setsignumber;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
if (sigaction(SIGPIPE, &act, &oact) != 0) e(1);
|
|
#else
|
|
oldfunc = signal(SIGPIPE, setsignumber);
|
|
#endif
|
|
|
|
/* Non valid file descriptors should be an error. */
|
|
for (fd = -111; fd < 0; fd++) {
|
|
errno = 0;
|
|
if (read(fd, buf, BUF_SIZE) != -1) e(2);
|
|
if (errno != EBADF) e(3);
|
|
}
|
|
for (fd = 3; fd < 111; fd++) {
|
|
errno = 0;
|
|
if (read(fd, buf, BUF_SIZE) != -1) e(4);
|
|
if (errno != EBADF) e(5);
|
|
}
|
|
for (fd = -111; fd < 0; fd++) {
|
|
errno = 0;
|
|
if (write(fd, buf, BUF_SIZE) != -1) e(6);
|
|
if (errno != EBADF) e(7);
|
|
}
|
|
for (fd = 3; fd < 111; fd++) {
|
|
errno = 0;
|
|
if (write(fd, buf, BUF_SIZE) != -1) e(8);
|
|
if (errno != EBADF) e(9);
|
|
}
|
|
|
|
/* Writing a pipe with no readers should trigger SIGPIPE. */
|
|
if (pipe(tube) != 0) e(10);
|
|
close(tube[0]);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
signumber = 0;
|
|
if (write(tube[1], buf, BUF_SIZE) != -1) e(11);
|
|
if (errno != EPIPE) e(12);
|
|
if (signumber != SIGPIPE) e(13);
|
|
if (close(tube[1]) != 0) e(14);
|
|
exit(0);
|
|
default:
|
|
close(tube[1]);
|
|
if (wait(&stat_loc) == -1) e(15);
|
|
if (stat_loc != 0) e(16); /* Alarm? */
|
|
}
|
|
|
|
/* Writing a fifo with no readers should trigger SIGPIPE. */
|
|
System("> /tmp/sema.38e");
|
|
if (mkfifo("fifo", 0666) != 0) e(17);
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
if ((fd = open("fifo", O_WRONLY)) != 3) e(18);
|
|
system("while test -f /tmp/sema.38e; do sleep 1; done");
|
|
signumber = 0;
|
|
if (write(fd, buf, BUF_SIZE) != -1) e(19);
|
|
if (errno != EPIPE) e(20);
|
|
if (signumber != SIGPIPE) e(21);
|
|
if (close(fd) != 0) e(22);
|
|
exit(0);
|
|
default:
|
|
if ((fd = open("fifo", O_RDONLY)) != 3) e(23);
|
|
if (close(fd) != 0) e(24);
|
|
unlink("/tmp/sema.38e");
|
|
if (wait(&stat_loc) == -1) e(25);
|
|
if (stat_loc != 0) e(26); /* Alarm? */
|
|
}
|
|
|
|
#ifdef SIGACTION
|
|
/* Restore normal (re)action to SIGPIPE. */
|
|
if (sigaction(SIGPIPE, &oact, NULL) != 0) e(27);
|
|
#else
|
|
signal(SIGPIPE, oldfunc);
|
|
#endif
|
|
|
|
/* Read from fifo should return -1 and set errno to EAGAIN. */
|
|
System("rm -rf /tmp/sema.38[fgh]");
|
|
switch (fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
system("while test ! -f /tmp/sema.38f; do sleep 1; done");
|
|
System("rm -rf /tmp/sema.38f");
|
|
if ((fd = open("fifo", O_WRONLY | O_NONBLOCK)) != 3) e(28);
|
|
close(creat("/tmp/sema.38g", 0666));
|
|
system("while test ! -f /tmp/sema.38h; do sleep 1; done");
|
|
if (close(fd) != 0) e(38);
|
|
System("rm -rf /tmp/sema.38h");
|
|
exit(0);
|
|
default:
|
|
if ((fd = open("fifo", O_RDONLY | O_NONBLOCK)) != 3) e(30);
|
|
close(creat("/tmp/sema.38f", 0666));
|
|
system("while test ! -f /tmp/sema.38g; do sleep 1; done");
|
|
System("rm -rf /tmp/sema.38g");
|
|
if (read(fd, buf, BUF_SIZE) != -1) e(31);
|
|
if (errno != EAGAIN) e(32);
|
|
if (read(fd, buf, BUF_SIZE) != -1) e(33);
|
|
if (errno != EAGAIN) e(34);
|
|
if (read(fd, buf, BUF_SIZE) != -1) e(35);
|
|
if (errno != EAGAIN) e(36);
|
|
close(creat("/tmp/sema.38h", 0666));
|
|
while (stat("/tmp/sema.38h", &st) == 0) sleep(1);
|
|
if (read(fd, buf, BUF_SIZE) != 0) e(37);
|
|
if (close(fd) != 0) e(38);
|
|
if (wait(&stat_loc) == -1) e(39);
|
|
if (stat_loc != 0) e(40); /* Alarm? */
|
|
}
|
|
System("rm -rf fifo");
|
|
|
|
/* If a read is interrupted by a SIGNAL. */
|
|
if (pipe(tube) != 0) e(41);
|
|
switch (pid = fork()) {
|
|
case -1: printf("Can't fork\n"); break;
|
|
case 0:
|
|
alarm(20);
|
|
#ifdef SIGACTION
|
|
act.sa_handler = setsignumber;
|
|
sigemptyset(&act.sa_mask);
|
|
act.sa_flags = 0;
|
|
if (sigaction(SIGUSR1, &act, &oact) != 0) e(42);
|
|
#else
|
|
oldfunc = signal(SIGUSR1, setsignumber);
|
|
#endif
|
|
if (read(tube[0], buf, BUF_SIZE) != -1) e(43);
|
|
if (errno != EINTR) e(44);
|
|
if (signumber != SIGUSR1) e(45);
|
|
#ifdef SIGACTION
|
|
/* Restore normal (re)action to SIGPIPE. */
|
|
if (sigaction(SIGUSR1, &oact, NULL) != 0) e(46);
|
|
#else
|
|
signal(SIGUSR1, oldfunc);
|
|
#endif
|
|
close(tube[0]);
|
|
close(tube[1]);
|
|
exit(0);
|
|
default:
|
|
/* The sleep 1 should give the child time to start the read. */
|
|
sleep(1);
|
|
close(tube[0]);
|
|
kill(pid, SIGUSR1);
|
|
wait(&stat_loc);
|
|
if (stat_loc != 0) e(47); /* Alarm? */
|
|
close(tube[1]);
|
|
}
|
|
}
|
|
|
|
void setsignumber(signum)
|
|
int signum;
|
|
{
|
|
signumber = signum;
|
|
}
|
|
|
|
|