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Red Hat Bugzilla – Attachment 159344 Details for
Bug 248405
the open(2) man page lists an incorrect requirement on O_DIRECT buffer alignment
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reproducer program
t.c (text/plain), 562 bytes, created by
Jeff Moyer
on 2007-07-16 17:40:15 UTC
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Description:
reproducer program
Filename:
MIME Type:
Creator:
Jeff Moyer
Created:
2007-07-16 17:40:15 UTC
Size:
562 bytes
patch
obsolete
>#define _GNU_SOURCE >#include <stdio.h> >#include <stdlib.h> >#include <fcntl.h> >#include <unistd.h> >#include <string.h> >#include <errno.h> > >static unsigned char buffer[4096] __attribute((aligned (4096))); > >int main(void) >{ > int fd, ret; > char *buf = buffer + 512; > > fd = open("/tmp/x", O_CREAT|O_RDWR|O_DIRECT, 0600); > if (fd < 0) { > perror("open"); > exit(1); > } > > ret = ftruncate(fd, 300); > if (ret < 0) { > printf("truncate returned error %d\n", errno); > exit(1); > } > > ret = read(fd, buf, 512); > if (ret < 0) { > perror("read(2)"); > exit(1); > } > return 0; >}
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bug 248405
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