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git://sourceware.org/git/glibc.git
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20b6b8e8a5
With fortification enabled, read calls return result needs to be checked,
has it gets the __wur macro enabled.
Note on read call removal from sysdeps/pthread/tst-cancel20.c and
sysdeps/pthread/tst-cancel21.c:
It is assumed that this second read call was there to overcome the race
condition between pipe closure and thread cancellation that could happen
in the original code. Since this race condition got fixed by
d0e3ffb7a5 the second call seems
superfluous. Hence, instead of checking for the return value of read, it
looks reasonable to simply remove it.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
131 lines
2.2 KiB
C
131 lines
2.2 KiB
C
#include <stdio.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <stdbool.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <support/xunistd.h>
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#ifndef O_NOATIME
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# define O_NOATIME 0
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#endif
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static int
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do_test (void)
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{
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char fname[] = "/tmp/jXXXXXX";
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int fd = mkstemp (fname);
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if (fd == -1)
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{
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puts ("mkstemp failed");
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return 1;
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}
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xwrite (fd, "hello", 5);
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close (fd);
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struct stat64 st;
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if (stat64 (fname, &st) == -1)
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{
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puts ("first stat failed");
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return 0;
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}
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/* Make sure there is enough time between the creation and the access. */
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sleep (2);
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fd = open (fname, O_RDONLY | O_NOATIME);
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if (fd == -1)
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{
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puts ("first open failed");
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return 1;
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}
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char buf[5];
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xread(fd, buf, sizeof (buf));
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close(fd);
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struct stat64 st2;
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if (stat64 (fname, &st2) == -1)
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{
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puts ("second stat failed");
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return 0;
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}
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bool no_noatime = false;
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#ifdef _STATBUF_ST_NSEC
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if (st.st_atim.tv_sec != st2.st_atim.tv_sec
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|| st.st_atim.tv_nsec != st2.st_atim.tv_nsec)
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#else
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if (st.st_atime != st2.st_atime)
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#endif
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{
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puts ("file atime changed");
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no_noatime = true;
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}
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unlink(fname);
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strcpy(fname, "/tmp/dXXXXXX");
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char *d = mkdtemp (fname);
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if (d == NULL)
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{
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puts ("mkdtemp failed");
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return 1;
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}
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if (stat64 (d, &st) == -1)
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{
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puts ("third stat failed");
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return 0;
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}
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sleep (2);
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fd = open64 (d, O_RDONLY|O_NDELAY|O_DIRECTORY|O_NOATIME);
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if (fd == -1)
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{
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puts ("second open failed");
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return 1;
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}
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DIR *dir = fdopendir (fd);
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if (dir == NULL)
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{
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puts ("fdopendir failed");
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return 1;
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}
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struct dirent *de;
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while ((de = readdir (dir)) != NULL)
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;
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closedir (dir);
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if (stat64 (d, &st2) == -1)
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{
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puts ("fourth stat failed");
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return 0;
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}
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#ifdef _STATBUF_ST_NSEC
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if (!no_noatime
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&& (st.st_atim.tv_sec != st2.st_atim.tv_sec
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|| st.st_atim.tv_nsec != st2.st_atim.tv_nsec))
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#else
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if (!no_noatime && st.st_atime != st2.st_atime)
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#endif
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{
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puts ("directory atime changed");
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return 1;
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}
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rmdir(fname);
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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