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support_chroot_create: Add support for /etc/hosts, /etc/host.conf

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This commit is contained in:
Florian Weimer 2017-09-01 08:58:07 +02:00
parent a2881ef014
commit 65329bd233
3 changed files with 41 additions and 12 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2017-09-01 Florian Weimer <fweimer@redhat.com>
* support/namespace.h (struct support_chroot_configuration): Add
hosts, host_conf.
(struct support_chroot): Add path_hosts, path_host_conf.
* support/support_chroot.c (write_file): New function.
(support_chroot_create): Call it to process /etc/resolv.conf,
/etc/hosts, /etc/host.conf.
(support_chroot_free): Update.
2017-09-01 Florian Weimer <fweimer@redhat.com> 2017-09-01 Florian Weimer <fweimer@redhat.com>
* sysdeps/posix/getaddrinfo.c (gaih_inet): Only use h_errno if * sysdeps/posix/getaddrinfo.c (gaih_inet): Only use h_errno if

11
support/namespace.h
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@ -66,7 +66,9 @@ struct support_chroot_configuration
{ {
/* File contents. The files are not created if the field is /* File contents. The files are not created if the field is
NULL. */ NULL. */
const char *resolv_conf; const char *resolv_conf; /* /etc/resolv.conf. */
const char *hosts; /* /etc/hosts. */
const char *host_conf; /* /etc/host.conf. */
}; };
/* The result of the creation of a chroot. */ /* The result of the creation of a chroot. */
@ -78,8 +80,11 @@ struct support_chroot
/* Path to the chroot directory. */ /* Path to the chroot directory. */
char *path_chroot; char *path_chroot;
/* Path to the /etc/resolv.conf file. */ /* Paths to files in the chroot. These are absolute and outside of
char *path_resolv_conf; the chroot. */
char *path_resolv_conf; /* /etc/resolv.conf. */
char *path_hosts; /* /etc/hosts. */
char *path_host_conf; /* /etc/host.conf. */
}; };
/* Create a chroot environment. The returned data should be freed /* Create a chroot environment. The returned data should be freed

32
support/support_chroot.c
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@ -24,6 +24,23 @@
#include <support/test-driver.h> #include <support/test-driver.h>
#include <support/xunistd.h> #include <support/xunistd.h>
/* If CONTENTS is not NULL, write it to the file at DIRECTORY/RELPATH,
and store the name in *ABSPATH. If CONTENTS is NULL, store NULL in
*ABSPATH. */
static void
write_file (const char *directory, const char *relpath, const char *contents,
char **abspath)
{
if (contents != NULL)
{
*abspath = xasprintf ("%s/%s", directory, relpath);
add_temp_file (*abspath);
support_write_file_string (*abspath, contents);
}
else
*abspath = NULL;
}
struct support_chroot * struct support_chroot *
support_chroot_create (struct support_chroot_configuration conf) support_chroot_create (struct support_chroot_configuration conf)
{ {
@ -39,15 +56,10 @@ support_chroot_create (struct support_chroot_configuration conf)
xmkdir (path_etc, 0777); xmkdir (path_etc, 0777);
add_temp_file (path_etc); add_temp_file (path_etc);
if (conf.resolv_conf != NULL) write_file (path_etc, "resolv.conf", conf.resolv_conf,
{ &chroot->path_resolv_conf);
/* Create an empty resolv.conf file. */ write_file (path_etc, "hosts", conf.hosts, &chroot->path_hosts);
chroot->path_resolv_conf = xasprintf ("%s/resolv.conf", path_etc); write_file (path_etc, "host.conf", conf.host_conf, &chroot->path_host_conf);
add_temp_file (chroot->path_resolv_conf);
support_write_file_string (chroot->path_resolv_conf, conf.resolv_conf);
}
else
chroot->path_resolv_conf = NULL;
free (path_etc); free (path_etc);
@ -67,5 +79,7 @@ support_chroot_free (struct support_chroot *chroot)
{ {
free (chroot->path_chroot); free (chroot->path_chroot);
free (chroot->path_resolv_conf); free (chroot->path_resolv_conf);
free (chroot->path_hosts);
free (chroot->path_host_conf);
free (chroot); free (chroot);
} }