compose: Move the passwd/group migration code to passwd-util
Pure code motion; no functional changes. Trying to get all of the passwd/group code in the same place so I can fix bugs in the interaction between them more easily.
This commit is contained in:
Colin Walters
parent
a960c6ed9d
commit
60b279ce48
@ -668,6 +668,165 @@ rpmostree_check_groups (OstreeRepo *repo,
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treedata, cancellable, error);
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}
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static FILE *
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gfopen (const char *path,
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const char *mode,
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GCancellable *cancellable,
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GError **error)
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{
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FILE *ret = NULL;
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ret = fopen (path, mode);
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if (!ret)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fopen(%s): ", path);
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return NULL;
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}
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return ret;
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}
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static gboolean
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gfflush (FILE *f,
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GCancellable *cancellable,
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GError **error)
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{
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if (fflush (f) != 0)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fflush: ");
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return FALSE;
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}
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return TRUE;
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}
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/*
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* This function is taking the /etc/passwd generated in the install
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* root, and splitting it into two streams: a new /etc/passwd that
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* just contains the root entry, and /usr/lib/passwd which contains
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* everything else.
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*
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* The implementation is kind of horrible because I wanted to avoid
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* duplicating the user/group code.
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*/
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gboolean
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rpmostree_passwd_migrate_except_root (GFile *rootfs,
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RpmOstreePasswdMigrateKind kind,
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GHashTable *preserve,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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const char *name = kind == RPM_OSTREE_PASSWD_MIGRATE_PASSWD ? "passwd" : "group";
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gs_free char *src_path = g_strconcat (gs_file_get_path_cached (rootfs), "/etc/", name, NULL);
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gs_free char *etctmp_path = g_strconcat (gs_file_get_path_cached (rootfs), "/etc/", name, ".tmp", NULL);
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gs_free char *usrdest_path = g_strconcat (gs_file_get_path_cached (rootfs), "/usr/lib/", name, NULL);
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FILE *src_stream = NULL;
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FILE *etcdest_stream = NULL;
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FILE *usrdest_stream = NULL;
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src_stream = gfopen (src_path, "r", cancellable, error);
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if (!src_stream)
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goto out;
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etcdest_stream = gfopen (etctmp_path, "w", cancellable, error);
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if (!etcdest_stream)
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goto out;
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usrdest_stream = gfopen (usrdest_path, "a", cancellable, error);
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if (!usrdest_stream)
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goto out;
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errno = 0;
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while (TRUE)
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{
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struct passwd *pw = NULL;
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struct group *gr = NULL;
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FILE *deststream;
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int r;
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guint32 id;
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const char *name;
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if (kind == RPM_OSTREE_PASSWD_MIGRATE_PASSWD)
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pw = fgetpwent (src_stream);
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else
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gr = fgetgrent (src_stream);
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if (!(pw || gr))
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{
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if (errno != 0 && errno != ENOENT)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fgetpwent: ");
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goto out;
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}
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else
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break;
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}
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if (pw)
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{
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id = pw->pw_uid;
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name = pw->pw_name;
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}
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else
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{
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id = gr->gr_gid;
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name = gr->gr_name;
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}
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if (id == 0)
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deststream = etcdest_stream;
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else
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deststream = usrdest_stream;
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if (pw)
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r = putpwent (pw, deststream);
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else
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r = putgrent (gr, deststream);
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/* If it's marked in the preserve group, we need to write to
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* *both* /etc and /usr/lib in order to preserve semantics for
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* upgraded systems from before we supported the preserve
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* concept.
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*/
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if (preserve && g_hash_table_contains (preserve, name))
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{
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/* We should never be trying to preserve the root entry, it
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* should always be only in /etc.
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*/
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g_assert (deststream == usrdest_stream);
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if (pw)
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r = putpwent (pw, etcdest_stream);
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else
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r = putgrent (gr, etcdest_stream);
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}
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if (r == -1)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "putpwent: ");
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goto out;
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}
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}
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if (!gfflush (etcdest_stream, cancellable, error))
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goto out;
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if (!gfflush (usrdest_stream, cancellable, error))
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goto out;
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if (rename (etctmp_path, src_path) != 0)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "rename(%s, %s): ",
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etctmp_path, src_path);
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goto out;
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}
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ret = TRUE;
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out:
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if (src_stream) (void) fclose (src_stream);
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if (etcdest_stream) (void) fclose (etcdest_stream);
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if (usrdest_stream) (void) fclose (usrdest_stream);
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return ret;
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}
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static gboolean
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concat_passwd_file (GFile *yumroot,
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GFile *previous_commit,
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@ -40,6 +40,18 @@ rpmostree_check_groups (OstreeRepo *repo,
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GCancellable *cancellable,
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GError **error);
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typedef enum {
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RPM_OSTREE_PASSWD_MIGRATE_PASSWD,
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RPM_OSTREE_PASSWD_MIGRATE_GROUP
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} RpmOstreePasswdMigrateKind;
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gboolean
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rpmostree_passwd_migrate_except_root (GFile *rootfs,
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RpmOstreePasswdMigrateKind kind,
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GHashTable *preserve,
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GCancellable *cancellable,
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GError **error);
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gboolean
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rpmostree_generate_passwd_from_previous (OstreeRepo *repo,
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GFile *yumroot,
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@ -34,6 +34,7 @@
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#include <stdlib.h>
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#include "rpmostree-postprocess.h"
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#include "rpmostree-passwd-util.h"
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#include "rpmostree-libcontainer.h"
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#include "rpmostree-cleanup.h"
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#include "rpmostree-json-parsing.h"
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@ -593,170 +594,6 @@ workaround_selinux_cross_labeling (GFile *rootfs,
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return ret;
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}
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static FILE *
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gfopen (const char *path,
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const char *mode,
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GCancellable *cancellable,
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GError **error)
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{
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FILE *ret = NULL;
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ret = fopen (path, mode);
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if (!ret)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fopen(%s): ", path);
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return NULL;
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}
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return ret;
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}
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static gboolean
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gfflush (FILE *f,
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GCancellable *cancellable,
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GError **error)
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{
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if (fflush (f) != 0)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fflush: ");
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return FALSE;
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}
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return TRUE;
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}
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typedef enum {
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MIGRATE_PASSWD,
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MIGRATE_GROUP
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} MigrateKind;
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/*
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* This function is taking the /etc/passwd generated in the install
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* root, and splitting it into two streams: a new /etc/passwd that
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* just contains the root entry, and /usr/lib/passwd which contains
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* everything else.
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*
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* The implementation is kind of horrible because I wanted to avoid
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* duplicating the user/group code.
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*/
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static gboolean
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migrate_passwd_file_except_root (GFile *rootfs,
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MigrateKind kind,
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GHashTable *preserve,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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const char *name = kind == MIGRATE_PASSWD ? "passwd" : "group";
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gs_free char *src_path = g_strconcat (gs_file_get_path_cached (rootfs), "/etc/", name, NULL);
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gs_free char *etctmp_path = g_strconcat (gs_file_get_path_cached (rootfs), "/etc/", name, ".tmp", NULL);
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gs_free char *usrdest_path = g_strconcat (gs_file_get_path_cached (rootfs), "/usr/lib/", name, NULL);
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FILE *src_stream = NULL;
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FILE *etcdest_stream = NULL;
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FILE *usrdest_stream = NULL;
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src_stream = gfopen (src_path, "r", cancellable, error);
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if (!src_stream)
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goto out;
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etcdest_stream = gfopen (etctmp_path, "w", cancellable, error);
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if (!etcdest_stream)
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goto out;
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usrdest_stream = gfopen (usrdest_path, "a", cancellable, error);
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if (!usrdest_stream)
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goto out;
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errno = 0;
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while (TRUE)
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{
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struct passwd *pw = NULL;
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struct group *gr = NULL;
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FILE *deststream;
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int r;
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guint32 id;
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const char *name;
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if (kind == MIGRATE_PASSWD)
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pw = fgetpwent (src_stream);
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else
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gr = fgetgrent (src_stream);
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if (!(pw || gr))
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{
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if (errno != 0 && errno != ENOENT)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "fgetpwent: ");
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goto out;
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}
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else
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break;
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}
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if (pw)
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{
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id = pw->pw_uid;
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name = pw->pw_name;
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}
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else
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{
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id = gr->gr_gid;
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name = gr->gr_name;
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}
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if (id == 0)
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deststream = etcdest_stream;
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else
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deststream = usrdest_stream;
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if (pw)
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r = putpwent (pw, deststream);
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else
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r = putgrent (gr, deststream);
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/* If it's marked in the preserve group, we need to write to
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* *both* /etc and /usr/lib in order to preserve semantics for
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* upgraded systems from before we supported the preserve
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* concept.
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*/
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if (preserve && g_hash_table_contains (preserve, name))
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{
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/* We should never be trying to preserve the root entry, it
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* should always be only in /etc.
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*/
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g_assert (deststream == usrdest_stream);
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if (pw)
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r = putpwent (pw, etcdest_stream);
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else
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r = putgrent (gr, etcdest_stream);
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}
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if (r == -1)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "putpwent: ");
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goto out;
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}
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}
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if (!gfflush (etcdest_stream, cancellable, error))
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goto out;
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if (!gfflush (usrdest_stream, cancellable, error))
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goto out;
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if (rename (etctmp_path, src_path) != 0)
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{
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_rpmostree_set_prefix_error_from_errno (error, errno, "rename(%s, %s): ",
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etctmp_path, src_path);
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goto out;
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}
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ret = TRUE;
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out:
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if (src_stream) (void) fclose (src_stream);
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if (etcdest_stream) (void) fclose (etcdest_stream);
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if (usrdest_stream) (void) fclose (usrdest_stream);
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return ret;
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}
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static gboolean
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replace_nsswitch (GFile *target_usretc,
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GCancellable *cancellable,
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@ -908,7 +745,7 @@ create_rootfs_from_yumroot_content (GFile *targetroot,
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goto out;
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g_print ("Migrating /etc/passwd to /usr/lib/\n");
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if (!migrate_passwd_file_except_root (yumroot, MIGRATE_PASSWD, NULL,
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if (!rpmostree_passwd_migrate_except_root (yumroot, RPM_OSTREE_PASSWD_MIGRATE_PASSWD, NULL,
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cancellable, error))
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goto out;
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@ -919,7 +756,8 @@ create_rootfs_from_yumroot_content (GFile *targetroot,
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}
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g_print ("Migrating /etc/group to /usr/lib/\n");
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if (!migrate_passwd_file_except_root (yumroot, MIGRATE_GROUP, preserve_groups_set,
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if (!rpmostree_passwd_migrate_except_root (yumroot, RPM_OSTREE_PASSWD_MIGRATE_GROUP,
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preserve_groups_set,
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cancellable, error))
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goto out;
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