-/*
+/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
-
+
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "rsync.h"
+#ifdef HAVE_GETGROUPS
+# if !defined(GETGROUPS_T)
+# define GETGROUPS_T gid_t
+# endif
+# ifndef NGROUPS_MAX
+/* It ought to be defined, but just in case. */
+# define NGROUPS_MAX 32
+# endif
+#endif
+
+extern int verbose;
extern int preserve_uid;
extern int preserve_gid;
extern int numeric_ids;
+extern int am_root;
struct idlist {
struct idlist *next;
static struct idlist *add_list(int id, char *name)
{
- struct idlist *list = (struct idlist *)malloc(sizeof(list[0]));
+ struct idlist *list = new(struct idlist);
if (!list) out_of_memory("add_list");
list->next = NULL;
list->name = strdup(name);
static int map_uid(int id, char *name)
{
uid_t uid;
- if (name_to_uid(name, &uid) && uid != 0)
+ if (uid != 0 && name_to_uid(name, &uid))
return uid;
return id;
}
static int map_gid(int id, char *name)
{
gid_t gid;
- if (name_to_gid(name, &gid) && gid != 0)
+ if (gid != 0 && name_to_gid(name, &gid))
return gid;
return id;
}
+static int is_in_group(gid_t gid)
+{
+#ifdef HAVE_GETGROUPS
+ static gid_t last_in = GID_NONE, last_out;
+ static int ngroups = -2;
+ static GETGROUPS_T *gidset;
+ int n;
+
+ if (gid == last_in)
+ return last_out;
+ if (ngroups < -1) {
+ gid_t mygid = MY_GID();
+ if ((ngroups = getgroups(0, 0)) < 0)
+ ngroups = 0;
+ gidset = new_array(GETGROUPS_T, ngroups+1);
+ if (ngroups > 0)
+ 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] == mygid)
+ break;
+ }
+ if (n == ngroups)
+ gidset[ngroups++] = mygid;
+ if (verbose > 3) {
+ char gidbuf[NGROUPS_MAX*16+32];
+ int pos;
+ sprintf(gidbuf, "process has %d gid%s: ",
+ ngroups, ngroups == 1? "" : "s");
+ pos = strlen(gidbuf);
+ for (n = 0; n < ngroups; n++) {
+ sprintf(gidbuf+pos, " %ld", (long)gidset[n]);
+ pos += strlen(gidbuf+pos);
+ }
+ rprintf(FINFO, "%s\n", gidbuf);
+ }
+ }
+
+ last_in = gid;
+ for (n = 0; n < ngroups; n++) {
+ if (gidset[n] == gid)
+ return last_out = 1;
+ }
+ return last_out = 0;
+
+#else
+ static gid_t mygid = GID_NONE;
+ if (mygid == GID_NONE) {
+ mygid = MY_GID();
+ if (verbose > 3)
+ rprintf(FINFO, "process has gid %ld\n", (long)mygid);
+ }
+ return gid == mygid;
+#endif
+}
+
/* this function is a definate candidate for a faster algorithm */
static uid_t match_uid(uid_t uid)
{
static uid_t last_in, last_out;
struct idlist *list = uidlist;
- if (uid == last_in) return last_out;
+ if (uid == last_in)
+ return last_out;
last_in = uid;
}
list = list->next;
}
-
+
last_out = uid;
return last_out;
}
static gid_t match_gid(gid_t gid)
{
- static gid_t last_in, last_out;
+ static gid_t last_in = GID_NONE, last_out = GID_NONE;
struct idlist *list = gidlist;
- if (gid == last_in) return last_out;
+ if (gid == last_in)
+ return last_out;
last_in = gid;
list = list->next;
}
- last_out = gid;
+ if (am_root || is_in_group(gid))
+ last_out = gid;
+ else
+ last_out = GID_NONE;
return last_out;
}
}
/* terminate the uid list with a 0 uid. We explicitly exclude
- 0 from the list */
+ * 0 from the list */
write_int(f, 0);
}
}
/* recv a complete uid/gid mapping from the peer and map the uid/gid
- in the file list to local names */
+ * in the file list to local names */
void recv_uid_list(int f, struct file_list *flist)
{
int id, i;
if (preserve_uid) {
/* read the uid list */
list = uidlist;
- id = read_int(f);
- while (id != 0) {
+ while ((id = read_int(f)) != 0) {
int len = read_byte(f);
- name = (char *)malloc(len+1);
+ name = new_array(char, len+1);
if (!name) out_of_memory("recv_uid_list");
read_sbuf(f, name, len);
if (!list) {
}
list->id2 = map_uid(id, name);
free(name);
- id = read_int(f);
+ }
+ if (verbose > 3) {
+ for (list = uidlist; list; list = list->next) {
+ rprintf(FINFO, "uid %ld (%s) maps to %ld\n",
+ (long)list->id, list->name,
+ (long)list->id2);
+ }
}
}
if (preserve_gid) {
/* and the gid list */
list = gidlist;
- id = read_int(f);
- while (id != 0) {
+ while ((id = read_int(f)) != 0) {
int len = read_byte(f);
- name = (char *)malloc(len+1);
+ name = new_array(char, len+1);
if (!name) out_of_memory("recv_uid_list");
read_sbuf(f, name, len);
if (!list) {
list = list->next;
}
list->id2 = map_gid(id, name);
+ if (!am_root && !is_in_group(list->id2))
+ list->id2 = GID_NONE;
free(name);
- id = read_int(f);
+ }
+ if (verbose > 3) {
+ for (list = gidlist; list; list = list->next) {
+ rprintf(FINFO, "gid %ld (%s) maps to %ld\n",
+ (long)list->id, list->name,
+ (long)list->id2);
+ }
}
}
- if (!uidlist && !gidlist) return;
+ if (!(am_root && preserve_uid) && !preserve_gid) return;
/* now convert the uid/gid of all files in the list to the mapped
- uid/gid */
- for (i=0;i<flist->count;i++) {
- if (preserve_uid && flist->files[i]->uid != 0) {
+ * uid/gid */
+ for (i = 0; i < flist->count; i++) {
+ if (am_root && preserve_uid && flist->files[i]->uid != 0)
flist->files[i]->uid = match_uid(flist->files[i]->uid);
- }
- if (preserve_gid && flist->files[i]->gid != 0) {
+ if (preserve_gid && (!am_root || flist->files[i]->gid != 0))
flist->files[i]->gid = match_gid(flist->files[i]->gid);
- }
}
}
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