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/*
SSSD
Utility functions related to ID information
Copyright (C) Jan Zeleny <jzeleny@redhat.com> 2012
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "util/util.h"
#include "util/sss_nss.h"
char *expand_homedir_template(TALLOC_CTX *mem_ctx, const char *template,
struct sss_nss_homedir_ctx *homedir_ctx)
{
char *copy;
char *p;
char *n;
char *result = NULL;
char *res = NULL;
TALLOC_CTX *tmp_ctx = NULL;
const char *orig = NULL;
if (template == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Missing template.\n");
return NULL;
}
if (homedir_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Missing home directory data.\n");
return NULL;
}
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return NULL;
copy = talloc_strdup(tmp_ctx, template);
if (copy == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_strdup failed.\n");
goto done;
}
result = talloc_strdup(tmp_ctx, "");
if (result == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_strdup failed.\n");
goto done;
}
p = copy;
while ( (n = strchr(p, '%')) != NULL) {
*n = '\0';
n++;
if ( *n == '\0' ) {
DEBUG(SSSDBG_CRIT_FAILURE, "format error, single %% at the end of "
"the template.\n");
goto done;
}
switch( *n ) {
case 'u':
if (homedir_ctx->username == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Cannot expand user name template because user name "
"is empty.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%s", p,
homedir_ctx->username);
break;
case 'U':
if (homedir_ctx->uid == 0) {
DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand uid template "
"because uid is invalid.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%d", p,
homedir_ctx->uid);
break;
case 'd':
if (homedir_ctx->domain == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand domain name "
"template because domain name "
"is empty.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%s", p,
homedir_ctx->domain);
break;
case 'f':
if (homedir_ctx->domain == NULL
|| homedir_ctx->username == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand fully qualified "
"name template because domain "
"or user name is empty.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%s@%s", p,
homedir_ctx->username,
homedir_ctx->domain);
break;
case 'o':
if (homedir_ctx->original == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Original home directory for %s is not available, "
"using empty string\n", homedir_ctx->username);
orig = "";
} else {
orig = homedir_ctx->original;
}
result = talloc_asprintf_append(result, "%s%s", p, orig);
break;
case 'F':
if (homedir_ctx->flatname == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Cannot expand domain name "
"template because domain flat "
"name is empty.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%s", p,
homedir_ctx->flatname);
break;
case 'H':
if (homedir_ctx->config_homedir_substr == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Cannot expand home directory substring template "
"substring is empty.\n");
goto done;
}
result = talloc_asprintf_append(result, "%s%s", p,
homedir_ctx->config_homedir_substr);
break;
case '%':
result = talloc_asprintf_append(result, "%s%%", p);
break;
default:
DEBUG(SSSDBG_CRIT_FAILURE, "format error, unknown template "
"[%%%c].\n", *n);
goto done;
}
if (result == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_asprintf_append failed.\n");
goto done;
}
p = n + 1;
}
result = talloc_asprintf_append(result, "%s", p);
if (result == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_asprintf_append failed.\n");
goto done;
}
res = talloc_move(mem_ctx, &result);
done:
talloc_zfree(tmp_ctx);
return res;
}
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