244 lines
6.1 KiB
C
244 lines
6.1 KiB
C
/* test29: dup() dup2() Author: Jan-Mark Wams (jms@cs.vu.nl) */
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/* The definition of ``dup2()'' is realy a big mess! For:
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**
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** (1) if fildes2 is less than zero or greater than {OPEN_MAX}
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** errno has to set to [EBADF]. But if fildes2 equals {OPEN_MAX}
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** errno has to be set to [EINVAL]. And ``fcntl(F_DUPFD...)'' always
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** returns [EINVAL] if fildes2 is out of range!
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**
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** (2) if the number of file descriptors would exceed {OPEN_MAX}, or no
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** file descriptors above fildes2 are available, errno has to be set
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** to [EMFILE]. But this can never occur!
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*/
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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 <stdio.h>
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#define MAX_ERROR 4
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#define ITERATIONS 10
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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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#define IS_CLOEXEC(fd) ((fcntl(fd, F_GETFD) & FD_CLOEXEC) == FD_CLOEXEC)
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#define SET_CLOEXEC(fd) fcntl(fd, F_SETFD, FD_CLOEXEC)
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int errct = 0;
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int subtest = 1;
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int superuser;
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char MaxName[NAME_MAX + 1]; /* Name of maximum length */
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char MaxPath[PATH_MAX]; /* Same for path */
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char ToLongName[NAME_MAX + 2]; /* Name of maximum +1 length */
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char ToLongPath[PATH_MAX + 1]; /* Same for path, both too long */
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_PROTOTYPE(void test29a, (void));
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_PROTOTYPE(void test29b, (void));
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_PROTOTYPE(void test29c, (void));
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_PROTOTYPE(void e, (int number));
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_PROTOTYPE(void quit, (void));
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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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if (argc == 2) m = atoi(argv[1]);
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printf("Test 29 ");
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fflush(stdout);
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System("rm -rf DIR_29; mkdir DIR_29");
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Chdir("DIR_29");
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superuser = (geteuid() == 0);
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for (i = 0; i < ITERATIONS; i++) {
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if (m & 0001) test29a();
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if (m & 0002) test29b();
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if (m & 0004) test29c();
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}
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quit();
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}
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void test29a()
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{
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int fd1, fd2, fd3, fd4, fd5;
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struct flock flock;
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subtest = 1;
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/* Basic checking. */
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if ((fd1 = dup(0)) != 3) e(1);
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if ((fd2 = dup(0)) != 4) e(2);
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if ((fd3 = dup(0)) != 5) e(3);
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if ((fd4 = dup(0)) != 6) e(4);
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if ((fd5 = dup(0)) != 7) e(5);
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if (close(fd2) != 0) e(6);
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if (close(fd4) != 0) e(7);
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if ((fd2 = dup(0)) != 4) e(8);
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if ((fd4 = dup(0)) != 6) e(9);
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if (close(fd1) != 0) e(10);
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if (close(fd3) != 0) e(11);
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if (close(fd5) != 0) e(12);
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if ((fd1 = dup(0)) != 3) e(13);
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if ((fd3 = dup(0)) != 5) e(14);
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if ((fd5 = dup(0)) != 7) e(15);
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if (close(fd1) != 0) e(16);
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if (close(fd2) != 0) e(17);
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if (close(fd3) != 0) e(18);
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if (close(fd4) != 0) e(19);
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if (close(fd5) != 0) e(20);
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/* FD_CLOEXEC should be cleared. */
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if ((fd1 = dup(0)) != 3) e(21);
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if (SET_CLOEXEC(fd1) == -1) e(22);
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if (!IS_CLOEXEC(fd1)) e(23);
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if ((fd2 = dup(fd1)) != 4) e(24);
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if ((fd3 = dup(fd2)) != 5) e(25);
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if (IS_CLOEXEC(fd2)) e(26);
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if (IS_CLOEXEC(fd3)) e(27);
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if (SET_CLOEXEC(fd2) == -1) e(28);
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if (!IS_CLOEXEC(fd2)) e(29);
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if (IS_CLOEXEC(fd3)) e(30);
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if (close(fd1) != 0) e(31);
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if (close(fd2) != 0) e(32);
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if (close(fd3) != 0) e(33);
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/* Locks should be shared, so we can lock again. */
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System("echo 'Hallo' > file");
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if ((fd1 = open("file", O_RDWR)) != 3) e(34);
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flock.l_whence = SEEK_SET;
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flock.l_start = 0;
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flock.l_len = 10;
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flock.l_type = F_WRLCK;
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if (fcntl(fd1, F_SETLK, &flock) == -1) e(35);
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if (fcntl(fd1, F_SETLK, &flock) == -1) e(36);
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if ((fd2 = dup(fd1)) != 4) e(37);
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if (fcntl(fd1, F_SETLK, &flock) == -1) e(38);
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if (fcntl(fd1, F_GETLK, &flock) == -1) e(39);
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#if 0 /* XXX - see test7.c */
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if (flock.l_type != F_WRLCK) e(40);
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if (flock.l_pid != getpid()) e(41);
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#endif /* 0 */
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flock.l_type = F_WRLCK;
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if (fcntl(fd2, F_GETLK, &flock) == -1) e(42);
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#if 0 /* XXX - see test7.c */
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if (flock.l_type != F_WRLCK) e(43);
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if (flock.l_pid != getpid()) e(44);
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#endif /* 0 */
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if (close(fd1) != 0) e(45);
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if (close(fd2) != 0) e(46);
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System("rm -rf ../DIR_29/*");
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}
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void test29b()
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{
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int fd;
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char buf[32];
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subtest = 2;
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/* Test file called ``file''. */
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System("echo 'Hallo!' > file");
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/* Check dup2() call with the same fds. Should have no effect. */
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if ((fd = open("file", O_RDONLY)) != 3) e(1);
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if (read(fd, buf, 2) != 2) e(2);
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if (strncmp(buf, "Ha", 2) != 0) e(3);
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if (dup2(fd, fd) != fd) e(4);
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if (read(fd, buf, 2) != 2) e(5);
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if (strncmp(buf, "ll", 2) != 0) e(6);
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if (dup2(fd, fd) != fd) e(7);
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if (read(fd, buf, 2) != 2) e(8);
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if (strncmp(buf, "o!", 2) != 0) e(9);
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if (close(fd) != 0) e(10);
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/* If dup2() call fails, the fildes2 argument has to stay open. */
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if ((fd = open("file", O_RDONLY)) != 3) e(11);
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if (read(fd, buf, 2) != 2) e(12);
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if (strncmp(buf, "Ha", 2) != 0) e(13);
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if (dup2(OPEN_MAX + 3, fd) != -1) e(14);
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if (errno != EBADF) e(15);
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if (read(fd, buf, 2) != 2) e(16);
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if (strncmp(buf, "ll", 2) != 0) e(17);
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if (dup2(-4, fd) != -1) e(18);
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if (errno != EBADF) e(19);
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if (read(fd, buf, 2) != 2) e(20);
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if (strncmp(buf, "o!", 2) != 0) e(21);
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if (close(fd) != 0) e(22);
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System("rm -rf ../DIR_29/*");
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}
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void test29c()
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{
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int i;
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subtest = 3;
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/* Check bad arguments to dup() and dup2(). */
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for (i = -OPEN_MAX; i < OPEN_MAX * 2; i++) {
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/* ``i'' is a valid and open fd. */
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if (i >= 0 && i < 3) continue;
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/* If ``i'' is a valid fd it is not open. */
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if (dup(i) != -1) e(1);
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if (errno != EBADF) e(2);
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/* ``i'' Is OPEN_MAX. */
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if (i == OPEN_MAX) {
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if (dup2(0, i) != -1) e(3);
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if (errno != EINVAL) e(4);
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}
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/* ``i'' Is out of range. */
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if (i < 0 || i > OPEN_MAX) {
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if (dup2(0, i) != -1) e(5);
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if (errno != EBADF) e(6);
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}
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}
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System("rm -rf ../DIR_29/*");
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}
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void e(n)
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int n;
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{
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int err_num = errno; /* Save in case printf clobbers it. */
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printf("Subtest %d, error %d errno=%d: ", subtest, n, errno);
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errno = err_num;
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perror("");
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if (errct++ > MAX_ERROR) {
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printf("Too many errors; test aborted\n");
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chdir("..");
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system("rm -rf DIR*");
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exit(1);
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}
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errno = 0;
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}
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void quit()
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{
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Chdir("..");
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System("rm -rf DIR_29");
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if (errct == 0) {
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printf("ok\n");
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exit(0);
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} else {
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printf("%d errors\n", errct);
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exit(1);
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}
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}
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