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image: Open parent image dir with -at calls

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After fixes with -W option we've changed the cwd at the
time parent images are opened. Use the -at syscall to
proerly access ones.

[ Cleanup and comment from xemul@ ]

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Ruslan Kuprieiev
2013-11-18 13:22:10 +04:00
committed by Pavel Emelyanov
parent 80559828d6
commit 486cad37cc
1 changed files with 9 additions and 7 deletions
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16
image.c
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@@ -241,25 +241,27 @@ int open_image_dir(char *dir)
ret = install_service_fd(IMG_FD_OFF, fd); ret = install_service_fd(IMG_FD_OFF, fd);
close(fd);
if (opts.img_parent) { if (opts.img_parent) {
ret = symlink(opts.img_parent, CR_PARENT_LINK); int pfd;
ret = symlinkat(opts.img_parent, fd, CR_PARENT_LINK);
if (ret < 0) { if (ret < 0) {
pr_perror("Can't link parent snapshot."); pr_perror("Can't link parent snapshot.");
goto err; goto err;
} }
fd = open(CR_PARENT_LINK, O_RDONLY); pfd = openat(fd, CR_PARENT_LINK, O_RDONLY);
if (fd < 0) { if (pfd < 0) {
pr_perror("Can't open parent snapshot."); pr_perror("Can't open parent snapshot.");
goto err; goto err;
} }
ret = install_service_fd(PARENT_FD_OFF, fd); ret = install_service_fd(PARENT_FD_OFF, pfd);
close(pfd);
}
close(fd); close(fd);
}
return ret; return ret;