*
* Copyright (C) 1996 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
- * Copyright (C) 2004-2020 Wayne Davison
+ * Copyright (C) 2004-2022 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
extern int preserve_gid;
extern int preserve_acls;
extern int numeric_ids;
+extern int xmit_id0_names;
+extern pid_t namecvt_pid;
extern gid_t our_gid;
extern char *usermap;
extern char *groupmap;
static struct idlist *uidlist, *uidmap;
static struct idlist *gidlist, *gidmap;
+static inline int id_eq_uid(id_t id, uid_t uid)
+{
+ return id == (id_t)uid;
+}
+
+static inline int id_eq_gid(id_t id, gid_t gid)
+{
+ return id == (id_t)gid;
+}
+
static id_t id_parse(const char *num_str)
{
id_t tmp, num = 0;
}
/* turn a uid into a user name */
-char *uid_to_user(uid_t uid)
+const char *uid_to_user(uid_t uid)
{
- struct passwd *pass = getpwuid(uid);
- if (pass)
- return strdup(pass->pw_name);
- return NULL;
+ const char *name = NULL;
+
+ if (namecvt_pid) {
+ id_t id = uid;
+ namecvt_call("uid", &name, &id);
+ } else {
+ struct passwd *pass = getpwuid(uid);
+ if (pass)
+ name = strdup(pass->pw_name);
+ }
+
+ return name;
}
/* turn a gid into a group name */
-char *gid_to_group(gid_t gid)
+const char *gid_to_group(gid_t gid)
{
- struct group *grp = getgrgid(gid);
- if (grp)
- return strdup(grp->gr_name);
- return NULL;
+ const char *name = NULL;
+
+ if (namecvt_pid) {
+ id_t id = gid;
+ namecvt_call("gid", &name, &id);
+ } else {
+ struct group *grp = getgrgid(gid);
+ if (grp)
+ name = strdup(grp->gr_name);
+ }
+
+ return name;
}
/* Parse a user name or (optionally) a number into a uid */
int user_to_uid(const char *name, uid_t *uid_p, BOOL num_ok)
{
- struct passwd *pass;
if (!name || !*name)
return 0;
+
if (num_ok && name[strspn(name, "0123456789")] == '\0') {
*uid_p = id_parse(name);
return 1;
}
- if (!(pass = getpwnam(name)))
- return 0;
- *uid_p = pass->pw_uid;
+
+ if (namecvt_pid) {
+ id_t id;
+ if (!namecvt_call("usr", &name, &id))
+ return 0;
+ *uid_p = id;
+ } else {
+ struct passwd *pass = getpwnam(name);
+ if (!pass)
+ return 0;
+ *uid_p = pass->pw_uid;
+ }
+
return 1;
}
/* Parse a group name or (optionally) a number into a gid */
int group_to_gid(const char *name, gid_t *gid_p, BOOL num_ok)
{
- struct group *grp;
if (!name || !*name)
return 0;
+
if (num_ok && name[strspn(name, "0123456789")] == '\0') {
*gid_p = id_parse(name);
return 1;
}
- if (!(grp = getgrnam(name)))
- return 0;
- *gid_p = grp->gr_gid;
+
+ if (namecvt_pid) {
+ id_t id;
+ if (!namecvt_call("grp", &name, &id))
+ return 0;
+ *gid_p = id;
+ } else {
+ struct group *grp = getgrnam(name);
+ if (!grp)
+ return 0;
+ *gid_p = grp->gr_gid;
+ }
+
return 1;
}
ngroups = getgroups(ngroups, gidset);
/* The default gid might not be in the list on some systems. */
for (n = 0; n < ngroups; n++) {
- if (gidset[n] == our_gid)
+ if ((gid_t)gidset[n] == our_gid)
break;
}
if (n == ngroups)
last_in = gid;
for (n = 0; n < ngroups; n++) {
- if (gidset[n] == gid)
+ if ((gid_t)gidset[n] == gid)
return last_out = 1;
}
return last_out = 0;
else if (*name && id) {
if (idlist_ptr == &uidlist) {
uid_t uid;
- id2 = user_to_uid(name, &uid, False) ? uid : id;
+ id2 = user_to_uid(name, &uid, False) ? (id_t)uid : id;
} else {
gid_t gid;
- id2 = group_to_gid(name, &gid, False) ? gid : id;
+ id2 = group_to_gid(name, &gid, False) ? (id_t)gid : id;
}
} else
id2 = id;
static struct idlist *last = NULL;
struct idlist *list;
- if (last && uid == last->id)
+ if (last && id_eq_uid(last->id, uid))
return last->id2;
for (list = uidlist; list; list = list->next) {
- if (list->id == uid)
+ if (id_eq_uid(list->id, uid))
break;
}
static struct idlist *last = NULL;
struct idlist *list;
- if (last && gid == last->id)
+ if (last && id_eq_gid(last->id, gid))
list = last;
else {
for (list = gidlist; list; list = list->next) {
- if (list->id == gid)
+ if (id_eq_gid(list->id, gid))
break;
}
if (!list)
struct idlist *node;
union name_or_id noiu;
- if (uid == 0) /* don't map root */
- return NULL;
-
for (list = uidlist; list; list = list->next) {
- if (list->id == uid)
+ if (id_eq_uid(list->id, uid))
return NULL;
}
struct idlist *node;
union name_or_id noiu;
- if (gid == 0) /* don't map root */
- return NULL;
-
for (list = gidlist; list; list = list->next) {
- if (list->id == gid)
+ if (id_eq_gid(list->id, gid))
return NULL;
}
return node->u.name;
}
-/* send a complete uid/gid mapping to the peer */
-void send_id_list(int f)
+static void send_one_name(int f, id_t id, const char *name)
{
- struct idlist *list;
+ int len;
- if (preserve_uid || preserve_acls) {
- int len;
- /* we send sequences of uid/byte-length/name */
- for (list = uidlist; list; list = list->next) {
- if (!list->u.name)
- continue;
- len = strlen(list->u.name);
- write_varint30(f, list->id);
- write_byte(f, len);
- write_buf(f, list->u.name, len);
- }
+ if (!name)
+ name = "";
+ if ((len = strlen(name)) > 255) /* Impossible? */
+ len = 255;
- /* terminate the uid list with a 0 uid. We explicitly exclude
- * 0 from the list */
- write_varint30(f, 0);
+ write_varint30(f, id);
+ write_byte(f, len);
+ if (len)
+ write_buf(f, name, len);
+}
+
+static void send_one_list(int f, struct idlist *idlist, int usernames)
+{
+ struct idlist *list;
+
+ /* we send sequences of id/byte-len/name */
+ for (list = idlist; list; list = list->next) {
+ if (list->id && list->u.name)
+ send_one_name(f, list->id, list->u.name);
}
- if (preserve_gid || preserve_acls) {
- int len;
- for (list = gidlist; list; list = list->next) {
- if (!list->u.name)
- continue;
- len = strlen(list->u.name);
- write_varint30(f, list->id);
- write_byte(f, len);
- write_buf(f, list->u.name, len);
- }
+ /* Terminate the uid list with 0 (which was excluded above).
+ * A modern rsync also sends the name of id 0. */
+ if (xmit_id0_names)
+ send_one_name(f, 0, usernames ? uid_to_user(0) : gid_to_group(0));
+ else
write_varint30(f, 0);
- }
+}
+
+/* send a complete uid/gid mapping to the peer */
+void send_id_lists(int f)
+{
+ if (preserve_uid || preserve_acls)
+ send_one_list(f, uidlist, 1);
+
+ if (preserve_gid || preserve_acls)
+ send_one_list(f, gidlist, 0);
}
uid_t recv_user_name(int f, uid_t uid)
{
struct idlist *node;
int len = read_byte(f);
- char *name = new_array(char, len+1);
- read_sbuf(f, name, len);
- if (numeric_ids < 0) {
- free(name);
+ char *name;
+
+ if (len) {
+ name = new_array(char, len+1);
+ read_sbuf(f, name, len);
+ if (numeric_ids < 0) {
+ free(name);
+ name = NULL;
+ }
+ } else
name = NULL;
- }
+
node = recv_add_id(&uidlist, uidmap, uid, name); /* node keeps name's memory */
return node->id2;
}
{
struct idlist *node;
int len = read_byte(f);
- char *name = new_array(char, len+1);
- read_sbuf(f, name, len);
- if (numeric_ids < 0) {
- free(name);
+ char *name;
+
+ if (len) {
+ name = new_array(char, len+1);
+ read_sbuf(f, name, len);
+ if (numeric_ids < 0) {
+ free(name);
+ name = NULL;
+ }
+ } else
name = NULL;
- }
+
node = recv_add_id(&gidlist, gidmap, gid, name); /* node keeps name's memory */
if (flags_ptr && node->flags & FLAG_SKIP_GROUP)
*flags_ptr |= FLAG_SKIP_GROUP;
/* read the uid list */
while ((id = read_varint30(f)) != 0)
recv_user_name(f, id);
+ if (xmit_id0_names)
+ recv_user_name(f, 0);
}
if ((preserve_gid || preserve_acls) && numeric_ids <= 0) {
/* read the gid list */
while ((id = read_varint30(f)) != 0)
recv_group_name(f, id, NULL);
+ if (xmit_id0_names)
+ recv_group_name(f, 0, NULL);
}
/* Now convert all the uids/gids from sender values to our values. */
*--cp = '\0'; /* replace comma */
}
- /* The 0 user/group doesn't get its name sent, so add it explicitly. */
- recv_add_id(idlist_ptr, *idmap_ptr, 0, numeric_ids ? NULL : usernames ? uid_to_user(0) : gid_to_group(0));
+ /* If the sender isn't going to xmit the id0 name, we assume it's "root". */
+ if (!xmit_id0_names)
+ recv_add_id(idlist_ptr, *idmap_ptr, 0, numeric_ids ? NULL : "root");
}
#ifdef HAVE_GETGROUPLIST
git.samba.org / rsync.git / blobdiff