Attachment 158364 Details for Bug 246509 – Test program to exercise the bug

Test program to exercise the bug

shmctl-bug.c (text/plain), 2.06 KB, created by Tom Lane on 2007-07-02 18:55:47 UTC

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Creator: Tom Lane

Created: 2007-07-02 18:55:47 UTC

Size: 2.06 KB

patch

obsolete

>#include <sys/ipc.h>
>#include <sys/shm.h>
>
>#include <errno.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>
>int
>main(int argc, char *argv[])
>{
>    int              shmid1;
>    int              shmid2;
>    int              shmid3;
>    struct shmid_ds  buf;
>
>    /* make and stat 2 shmem segments */
>    shmid1 = shmget(0x12345678, 1024 * 1024, IPC_CREAT | IPC_EXCL | 0600);
>    if (shmid1 < 0)
>    {
>	perror("shmget 1 failed");
>	exit(1);
>    }
>    printf("id1 = %d / %#x\n", shmid1, shmid1);
>
>    shmid2 = shmget(0x12345679, 1024 * 1024, IPC_CREAT | IPC_EXCL | 0600);
>    if (shmid2 < 0)
>    {
>	perror("shmget 2 failed");
>	exit(1);
>    }
>    printf("id2 = %d / %#x\n", shmid2, shmid2);
>
>    if (shmctl(shmid1, IPC_STAT, &buf) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_STAT): ERROR: %s\n", shmid1, shmid1,
>	       strerror(errno));
>    }
>
>    if (shmctl(shmid2, IPC_STAT, &buf) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_STAT): ERROR: %s\n", shmid2, shmid2,
>	       strerror(errno));
>    }
>
>    /* remove both */
>    if (shmctl(shmid1, IPC_RMID, NULL) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_RMID): ERROR: %s\n", shmid1, shmid1,
>	       strerror(errno));
>    }
>    if (shmctl(shmid2, IPC_RMID, NULL) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_RMID): ERROR: %s\n", shmid2, shmid2,
>	       strerror(errno));
>    }
>
>    /* make a third one */
>    shmid3 = shmget(0x1234567A, 1024 * 1024, IPC_CREAT | IPC_EXCL | 0600);
>    if (shmid3 < 0)
>    {
>	perror("shmget 3 failed");
>	exit(1);
>    }
>    printf("id3 = %d / %#x\n", shmid3, shmid3);
>
>    /* now observe stat behavior for the two old IDs */
>
>    if (shmctl(shmid1, IPC_STAT, &buf) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_STAT): ERROR: %s\n", shmid1, shmid1,
>	       strerror(errno));
>    }
>
>    if (shmctl(shmid2, IPC_STAT, &buf) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_STAT): ERROR: %s\n", shmid2, shmid2,
>	       strerror(errno));
>    }
>
>    /* clean up by removing third segment */
>    if (shmctl(shmid3, IPC_RMID, NULL) < 0)
>    {
>	printf("shmctl(%d / %#x, IPC_RMID): ERROR: %s\n", shmid3, shmid3,
>	       strerror(errno));
>    }
>
>    return 0;
>}

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Attachments on bug 246509: 158364