summaryrefslogtreecommitdiffstats
path: root/src/util/sss_nss.c
blob: 2b7338329f668d4893b204d7cc282ab4e29ac886 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
   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,
                              const char *username, uint32_t uid,
                              const char *original, const char *domain,
                              const char *flatname)
{
    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;
    }

    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 (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,
                                                username);
                break;

            case 'U':
                if (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,
                                                uid);
                break;

            case 'd':
                if (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,
                                                domain);
                break;

            case 'f':
                if (domain == NULL || 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,
                                                username, domain);
                break;

            case 'o':
                if (original == NULL) {
                    DEBUG(SSSDBG_CRIT_FAILURE,
                          ("Original home directory for %s is not available, "
                           "using empty string\n", username));
                    orig = "";
                } else {
                    orig = original;
                }
                result = talloc_asprintf_append(result, "%s%s", p, orig);
                break;

            case 'F':
                if (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, flatname);
                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;
}