Re: pkg/57145: gmake: *** INTERNAL: readdir: Operation not supported. Stop.

[Andrew Cagney <andrew.cagney%gmail.com@localhost>]

This is after a reboot, /source and /testing are automounted.

[root@netbsd ~]# cd /source

[root@netbsd source]# df
Filesystem     512-blocks         Used        Avail %Cap Mounted on
/dev/wd0a        20643484      4176144     15435168  21% /
kernfs                  2            2            0 100% /kern
ptyfs                   2            2            0 100% /dev/pts
procfs                  8            8            0 100% /proc
tmpfs             1048312            0      1048312   0% /var/shm
tmpfs             3897616            8      3897608   0% /tmp
map -noauto             0            0            0 100% /source
map -noauto             0            0            0 100% /testing

[root@netbsd source]# mount

/dev/wd0a on / type ffs (noatime, local)
kernfs on /kern type kernfs (local)
ptyfs on /dev/pts type ptyfs (local)
procfs on /proc type procfs (local)
tmpfs on /var/shm type tmpfs (local)
tmpfs on /tmp type tmpfs (local)
map -noauto on /source type autofs
map -noauto on /testing type autofs

Note that the mount of /source hasn't yet triggered.  Now what I
believe is the test case:

[root@netbsd source]# cc open-lseek.c
[root@netbsd source]# ./a.out
missing mount-point[root@netbsd source 1]# ./a.out /testing
chdir(/testing)
flags 600004 vs 600004
mode f0 vs f0
open(.,600004,f0)
lseek(3, 0, SEEK_CUR)
lseek: Operation not supported

for comparison:

[root@freebsd source]# cc open-lseek.c
[root@freebsd source]# ./a.out
missing mount-point[root@freebsd source 1]# ./a.out /testing
chdir(/testing)
flags 120004 vs 120004
mode f0 vs f0
open(.,120004,f0)
lseek(3, 0, SEEK_CUR)
[root@freebsd source]# df
Filesystem                                     1K-blocks      Used
Avail Capacity  Mounted on
/dev/vtbd0s1a                                    9638812   5610152
3257556    63%    /
devfs                                                  1         0
   1     0%    /dev
map -noauto                                            0         0
   0   100%    /source
map -noauto                                            0         0
   0   100%    /testing
192.168.234.1:/home/libreswan/mainline         960302096 886320800
25126872    97%    /source
192.168.234.1:/home/libreswan/mainline/testing 960302096 886320800
25126872    97%    /testing

and the code:

#include <stdio.h>
#include <stdlib.h> /* for exit() */
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/mount.h>

static void barf(const char *what)
{
perror(what);
exit(1);
}

static unsigned flags(const char *what, unsigned actual, unsigned expected)
{
printf("%s %x vs %x\n", what, actual, expected);
return expected;
}

int main(int argc, char *argv[])
{
if (argc < 2) {
fprintf(stderr, "missing mount-point");
exit(1);
}

const char *mount = argv[1];

printf("chdir(%s)\n", mount);
chdir(mount);
if (errno > 0) {
barf("chdir");
}

unsigned open_flags = flags("flags", O_DIRECTORY|O_CLOEXEC|O_NONBLOCK,
O_DIRECTORY|O_CLOEXEC|O_NONBLOCK);
unsigned open_mode = flags("mode", S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP, 0xf0);
printf("open(%s,%x,%x)\n", ".", open_flags, open_mode);
int fd = open(".", open_flags, open_mode);
if (errno > 0) {
barf("open");
}

printf("lseek(%d, 0, SEEK_CUR)\n", fd);
lseek(fd, /*offset*/0, /*wence*/SEEK_CUR);
if (errno > 0) {
barf("lseek");
}

exit(0);
}