return 0; /* Allow the environment contents to be parsed. */
}
+/*******************************************************************
+ Given a pointer to a %$(NAME) in p and the whole string in str
+ expand it as an environment variable.
+ Return a new allocated and expanded string.
+ Based on code by Branko Cibej <branko.cibej@hermes.si>
+ When this is called p points at the '%' character.
+ May substitute multiple occurrencies of the same env var.
+********************************************************************/
+
+
+static char * realloc_expand_env_var(char *str, char *p)
+{
+ char *envname;
+ char *envval;
+ char *q, *r;
+ int copylen;
+
+ if (p[0] != '%' || p[1] != '$' || p[2] != '(')
+ return str;
+
+ /*
+ * Look for the terminating ')'.
+ */
+
+ if ((q = strchr_m(p,')')) == NULL) {
+ DEBUG(0,("expand_env_var: Unterminated environment variable [%s]\n", p));
+ return str;
+ }
+
+ /*
+ * Extract the name from within the %$(NAME) string.
+ */
+
+ r = p + 3;
+ copylen = q - r;
+ envname = (char *)malloc(copylen + 1 + 4); /* reserve space for use later add %$() chars */
+ if (envname == NULL) return NULL;
+ strncpy(envname,r,copylen);
+ envname[copylen] = '\0';
+
+ if ((envval = getenv(envname)) == NULL) {
+ DEBUG(0,("expand_env_var: Environment variable [%s] not set\n", envname));
+ SAFE_FREE(envname);
+ return str;
+ }
+
+ /*
+ * Copy the full %$(NAME) into envname so it
+ * can be replaced.
+ */
+
+ copylen = q + 1 - p;
+ strncpy(envname,p,copylen);
+ envname[copylen] = '\0';
+ r = realloc_string_sub(str, envname, envval);
+ SAFE_FREE(envname);
+ if (r == NULL) return NULL;
+ return r;
+}
+
/*******************************************************************
Patch from jkf@soton.ac.uk
Added this to implement %p (NIS auto-map version of %H)
/****************************************************************************
Do some standard substitutions in a string.
+ len is the length in bytes of the space allowed in string str. If zero means
+ don't allow expansions.
****************************************************************************/
-void standard_sub_basic(const char *smb_name, char *str)
+void standard_sub_basic(const char *smb_name, char *str,size_t len)
{
char *p, *s;
fstring pidstr;
for (s=str; (p=strchr_m(s, '%'));s=p) {
fstring tmp_str;
- int l = sizeof(pstring) - (int)(p-str);
+ int l = (int)len - (int)(p-str);
+
+ if (l < 0)
+ l = 0;
switch (*(p+1)) {
case 'U' :
strupper(tmp_str);
string_sub(p,"%D", tmp_str,l);
break;
- case 'I' : string_sub(p,"%I", client_addr(),l); break;
+ case 'I' :
+ string_sub(p,"%I", client_addr(),l);
+ break;
case 'L' :
- if (*local_machine) {
+ if (*local_machine)
string_sub(p,"%L", local_machine,l);
- } else {
+ else
string_sub(p,"%L", global_myname,l);
- }
break;
- case 'M' : string_sub(p,"%M", client_name(),l); break;
- case 'R' : string_sub(p,"%R", remote_proto,l); break;
- case 'T' : string_sub(p,"%T", timestring(False),l); break;
- case 'a' : string_sub(p,"%a", remote_arch,l); break;
+ case 'M' :
+ string_sub(p,"%M", client_name(),l);
+ break;
+ case 'R' :
+ string_sub(p,"%R", remote_proto,l);
+ break;
+ case 'T' :
+ string_sub(p,"%T", timestring(False),l);
+ break;
+ case 'a' :
+ string_sub(p,"%a", remote_arch,l);
+ break;
case 'd' :
slprintf(pidstr,sizeof(pidstr)-1, "%d",(int)sys_getpid());
string_sub(p,"%d", pidstr,l);
break;
- case 'h' : string_sub(p,"%h", myhostname(),l); break;
- case 'm' : string_sub(p,"%m", remote_machine,l); break;
- case 'v' : string_sub(p,"%v", VERSION,l); break;
- case '$' : p += expand_env_var(p,l); break; /* Expand environment variables */
+ case 'h' :
+ string_sub(p,"%h", myhostname(),l);
+ break;
+ case 'm' :
+ string_sub(p,"%m", remote_machine,l);
+ break;
+ case 'v' :
+ string_sub(p,"%v", VERSION,l);
+ break;
+ case '$' :
+ p += expand_env_var(p,l);
+ break; /* Expand environment variables */
case '\0':
p++;
break; /* don't run off the end of the string */
}
}
-/****************************************************************************
- Do some standard substitutions in a string.
-****************************************************************************/
-
-void standard_sub_advanced(int snum, const char *user, const char *connectpath, gid_t gid, const char *smb_name, char *str)
+static void standard_sub_advanced(int snum, const char *user,
+ const char *connectpath, gid_t gid,
+ const char *smb_name, char *str, size_t len)
{
char *p, *s, *home;
for (s=str; (p=strchr_m(s, '%'));s=p) {
- int l = sizeof(pstring) - (int)(p-str);
-
+ int l = (int)len - (int)(p-str);
+
+ if (l < 0)
+ l = 0;
+
switch (*(p+1)) {
- case 'N' : string_sub(p,"%N", automount_server(user),l); break;
+ case 'N' :
+ string_sub(p,"%N", automount_server(user),l);
+ break;
case 'H':
- if ((home = get_user_home_dir(user))) {
+ if ((home = get_user_home_dir(user)))
string_sub(p,"%H",home, l);
- } else {
+ else
p += 2;
- }
break;
case 'P':
string_sub(p,"%P", connectpath, l);
break;
-
case 'S':
string_sub(p,"%S", lp_servicename(snum), l);
break;
-
case 'g':
string_sub(p,"%g", gidtoname(gid), l);
break;
}
}
- standard_sub_basic(smb_name, str);
+ standard_sub_basic(smb_name, str, len);
}
/****************************************************************************
Do some standard substitutions in a string.
+ This function will return an allocated string that have to be freed.
****************************************************************************/
-void standard_sub_conn(connection_struct *conn, char *str)
+char *talloc_sub_basic(TALLOC_CTX *mem_ctx, const char *smb_name, const char *str)
{
- standard_sub_advanced(SNUM(conn), conn->user, conn->connectpath, conn->gid, current_user_info.smb_name, str);
+ char *a, *t;
+ a = alloc_sub_basic(smb_name, str);
+ if (!a) return NULL;
+ t = talloc_strdup(mem_ctx, a);
+ SAFE_FREE(a);
+ return t;
+}
+
+char *alloc_sub_basic(const char *smb_name, const char *str)
+{
+ char *b, *p, *s, *t, *r, *a_string;
+ fstring pidstr;
+ struct passwd *pass;
+
+ a_string = strdup(str);
+ if (a_string == NULL) {
+ DEBUG(0, ("alloc_sub_specified: Out of memory!\n"));
+ return NULL;
+ }
+
+ for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
+
+ r = NULL;
+ b = t = a_string;
+
+ switch (*(p+1)) {
+ case 'U' :
+ r = strdup_lower(smb_name);
+ if (r == NULL) goto error;
+ t = realloc_string_sub(t, "%U", r);
+ break;
+ case 'G' :
+ r = strdup(smb_name);
+ if (r == NULL) goto error;
+ if ((pass = Get_Pwnam(r))!=NULL) {
+ t = realloc_string_sub(t, "%G", gidtoname(pass->pw_gid));
+ }
+ break;
+ case 'D' :
+ r = strdup_upper(current_user_info.domain);
+ if (r == NULL) goto error;
+ t = realloc_string_sub(t, "%D", r);
+ break;
+ case 'I' :
+ t = realloc_string_sub(t, "%I", client_addr());
+ break;
+ case 'L' :
+ if (*local_machine)
+ t = realloc_string_sub(t, "%L", local_machine);
+ else
+ t = realloc_string_sub(t, "%L", global_myname);
+ break;
+ case 'M' :
+ t = realloc_string_sub(t, "%M", client_name());
+ break;
+ case 'R' :
+ t = realloc_string_sub(t, "%R", remote_proto);
+ break;
+ case 'T' :
+ t = realloc_string_sub(t, "%T", timestring(False));
+ break;
+ case 'a' :
+ t = realloc_string_sub(t, "%a", remote_arch);
+ break;
+ case 'd' :
+ slprintf(pidstr,sizeof(pidstr)-1, "%d",(int)sys_getpid());
+ t = realloc_string_sub(t, "%d", pidstr);
+ break;
+ case 'h' :
+ t = realloc_string_sub(t, "%h", myhostname());
+ break;
+ case 'm' :
+ t = realloc_string_sub(t, "%m", remote_machine);
+ break;
+ case 'v' :
+ t = realloc_string_sub(t, "%v", VERSION);
+ break;
+ case '$' :
+ t = realloc_expand_env_var(t, p); /* Expand environment variables */
+ break;
+
+ default:
+ break;
+ }
+
+ p++;
+ SAFE_FREE(r);
+ if (t == NULL) goto error;
+ a_string = t;
+ }
+
+ return a_string;
+error:
+ SAFE_FREE(a_string);
+ return NULL;
}
/****************************************************************************
- Like standard_sub but for a homes share where snum still points to the [homes]
- share. No user specific snum created yet so servicename should be the username.
+ Do some specific substitutions in a string.
+ This function will return an allocated string that have to be freed.
****************************************************************************/
-void standard_sub_home(int snum, const char *user, char *str)
+char *talloc_sub_specified(TALLOC_CTX *mem_ctx,
+ const char *input_string,
+ const char *username,
+ const char *domain,
+ uid_t uid,
+ gid_t gid)
{
- char *p, *s;
+ char *a, *t;
+ a = alloc_sub_specified(input_string, username, domain, uid, gid);
+ if (!a) return NULL;
+ t = talloc_strdup(mem_ctx, a);
+ SAFE_FREE(a);
+ return t;
+}
- for (s=str; (p=strchr_m(s, '%'));s=p) {
- int l = sizeof(pstring) - (int)(p-str);
+char *alloc_sub_specified(const char *input_string,
+ const char *username,
+ const char *domain,
+ uid_t uid,
+ gid_t gid)
+{
+ char *a_string, *ret_string;
+ char *b, *p, *s, *t;
+
+ a_string = strdup(input_string);
+ if (a_string == NULL) {
+ DEBUG(0, ("alloc_sub_specified: Out of memory!\n"));
+ return NULL;
+ }
+
+ for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
+
+ b = t = a_string;
+
+ switch (*(p+1)) {
+ case 'U' :
+ t = realloc_string_sub(t, "%U", username);
+ break;
+ case 'u' :
+ t = realloc_string_sub(t, "%u", username);
+ break;
+ case 'G' :
+ if (gid != -1) {
+ t = realloc_string_sub(t, "%G", gidtoname(gid));
+ } else {
+ t = realloc_string_sub(t, "%G", "NO_GROUP");
+ }
+ break;
+ case 'g' :
+ if (gid != -1) {
+ t = realloc_string_sub(t, "%g", gidtoname(gid));
+ } else {
+ t = realloc_string_sub(t, "%g", "NO_GROUP");
+ }
+ break;
+ case 'D' :
+ t = realloc_string_sub(t, "%D", domain);
+ break;
+ case 'N' :
+ t = realloc_string_sub(t, "%N", automount_server(username));
+ break;
+ default:
+ break;
+ }
+
+ p++;
+ if (t == NULL) {
+ SAFE_FREE(a_string);
+ return NULL;
+ }
+ a_string = t;
+ }
+
+ ret_string = alloc_sub_basic(username, a_string);
+ SAFE_FREE(a_string);
+ return ret_string;
+}
+
+char *talloc_sub_advanced(TALLOC_CTX *mem_ctx,
+ int snum,
+ const char *user,
+ const char *connectpath,
+ gid_t gid,
+ const char *smb_name,
+ char *str)
+{
+ char *a, *t;
+ a = alloc_sub_advanced(snum, user, connectpath, gid, smb_name, str);
+ if (!a) return NULL;
+ t = talloc_strdup(mem_ctx, a);
+ SAFE_FREE(a);
+ return t;
+}
+
+char *alloc_sub_advanced(int snum, const char *user,
+ const char *connectpath, gid_t gid,
+ const char *smb_name, char *str)
+{
+ char *a_string, *ret_string;
+ char *b, *p, *s, *t, *h;
+
+ a_string = strdup(str);
+ if (a_string == NULL) {
+ DEBUG(0, ("alloc_sub_specified: Out of memory!\n"));
+ return NULL;
+ }
+
+ for (b = s = a_string; (p = strchr_m(s, '%')); s = a_string + (p - b)) {
+
+ b = t = a_string;
switch (*(p+1)) {
+ case 'N' :
+ t = realloc_string_sub(t, "%N", automount_server(user));
+ break;
+ case 'H':
+ if ((h = get_user_home_dir(user)))
+ t = realloc_string_sub(t, "%H", h);
+ break;
+ case 'P':
+ t = realloc_string_sub(t, "%P", connectpath);
+ break;
case 'S':
- string_sub(p,"%S", user, l);
+ t = realloc_string_sub(t, "%S", lp_servicename(snum));
+ break;
+ case 'g':
+ t = realloc_string_sub(t, "%g", gidtoname(gid));
+ break;
+ case 'u':
+ t = realloc_string_sub(t, "%u", user);
break;
+
+ /* Patch from jkf@soton.ac.uk Left the %N (NIS
+ * server name) in standard_sub_basic as it is
+ * a feature for logon servers, hence uses the
+ * username. The %p (NIS server path) code is
+ * here as it is used instead of the default
+ * "path =" string in [homes] and so needs the
+ * service name, not the username. */
case 'p':
- string_sub(p,"%p", automount_path(user), l);
+ t = realloc_string_sub(t, "%p", automount_path(lp_servicename(snum)));
break;
- case '\0':
- p++;
- break; /* don't run off the end of the string */
- default: p+=2;
+ default:
break;
}
+
+ p++;
+ if (t == NULL) {
+ SAFE_FREE(a_string);
+ return NULL;
+ }
+ a_string = t;
}
- standard_sub_advanced(snum, user, "", -1, current_user_info.smb_name, str);
+ ret_string = alloc_sub_basic(smb_name, a_string);
+ SAFE_FREE(a_string);
+ return ret_string;
+}
+
+/****************************************************************************
+ Do some standard substitutions in a string.
+****************************************************************************/
+
+void standard_sub_conn(connection_struct *conn, char *str, size_t len)
+{
+ standard_sub_advanced(SNUM(conn), conn->user, conn->connectpath,
+ conn->gid, current_user_info.smb_name, str, len);
}
/****************************************************************************
Like standard_sub but by snum.
****************************************************************************/
-void standard_sub_snum(int snum, char *str)
+void standard_sub_snum(int snum, char *str, size_t len)
{
extern struct current_user current_user;
static uid_t cached_uid = -1;
cached_uid = current_user.uid;
}
- standard_sub_advanced(snum, cached_user, "", -1, current_user_info.smb_name, str);
-}
-
-/*******************************************************************
- Substitute strings with useful parameters.
-********************************************************************/
-
-void standard_sub_vuser(char *str, user_struct *vuser)
-{
- standard_sub_advanced(-1, vuser->user.unix_name, "", -1, current_user_info.smb_name, str);
-}
-
-/*******************************************************************
- Substitute strings with useful parameters.
-********************************************************************/
-
-void standard_sub_vsnum(char *str, user_struct *vuser, int snum)
-{
- standard_sub_advanced(snum, vuser->user.unix_name, "", -1, current_user_info.smb_name, str);
+ standard_sub_advanced(snum, cached_user, "", -1,
+ current_user_info.smb_name, str, len);
}
git.samba.org / samba.git / blobdiff