Could be reproduced with 3.6.9 and current HEAD.
Testcase:
$ uname -r # or 3.6.9-1.x86_64
3.7.0-0.483.ga1f347c0d5b8.x86_64
$ cat openmany.c
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/stat.h>
int main()
{
for (int i = 0; i < 10000; i++) {
char name[32];
snprintf(name, sizeof(name), "file-%04d.tmp", i);
errno = 0;
int fd = open(name, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd >= 0)
continue;
printf("open(%s, ...)=%d (errno=%d)\n", name, fd, errno);
struct stat st;
printf("stat(%s, ...)=%d\n", name, stat(name, &st));
break;
}
return 0;
}
$ gcc -o openmany openmany.c
$ ls file-*.tmp
ls: cannot access 'file-*.tmp': No such file or directory
$ ulimit -n
3200
$ ./openmany
open(file-3197.tmp, ...)=-1 (errno=24)
stat(file-3197.tmp, ...)=0
$ ls file-*.tmp
file-0000.tmp
file-0001.tmp
...
file-3195.tmp
file-3196.tmp
file-3197.tmp
$ grep -w 24 /usr/include/sys/errno.h
#define EMFILE 24 /* File descriptor value too large */
Looks like the fd is allocated too late.
--
Regards,
Christian
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