summaryrefslogtreecommitdiff
path: root/conf/pam_conv1/pam_conv_y.y
blob: b03af76bde232cf0137bddaa8e8438c247787cdf (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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
%{

/*
 * $Id: pam_conv_y.y,v 1.1 2006/07/24 16:14:40 kukuk Exp $
 *
 * Copyright (c) Andrew G. Morgan 1997 <morgan@parc.power.net>
 *
 * This file is covered by the Linux-PAM License (which should be
 * distributed with this file.)
 */

    static const char bisonid[]=
	"$Id: pam_conv_y.y,v 1.1 2006/07/24 16:14:40 kukuk Exp $\n"
	"Copyright (c) Andrew G. Morgan 1997-8 <morgan@linux.kernel.org>\n";

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>

    extern int yylex(void);

    int current_line=1;
    extern char *yytext;

/* XXX - later we'll change this to be the specific conf file(s) */
#define newpamf stderr

#define PAM_D                "./pam.d"
#define PAM_D_MODE           0755
#define PAM_D_MAGIC_HEADER   \
    "#%%PAM-1.0\n" \
    "#[For version 1.0 syntax, the above header is optional]\n"

#define PAM_D_FILE_FMT       PAM_D "/%s"

    const char *old_to_new_ctrl_flag(const char *old);
    void yyerror(const char *format, ...);
%}

%union {
    int def;
    char *string;
}

%token NL EOFILE TOK

%type <string> tok path tokenls

%start complete

%%

complete
:
| complete NL
| complete line
| complete EOFILE {
    return 0;
}
;

line
: tok tok tok path tokenls NL {
    char *filename;
    FILE *conf;
    int i;

    /* make sure we have lower case */
    for (i=0; $1[i]; ++i) {
	$1[i] = tolower($1[i]);
    }

    /* $1 = service-name */
    yyerror("Appending to " PAM_D "/%s", $1);

    filename = malloc(strlen($1) + sizeof(PAM_D) + 6);
    sprintf(filename, PAM_D_FILE_FMT, $1);
    conf = fopen(filename, "r");
    if (conf == NULL) {
	/* new file */
	conf = fopen(filename, "w");
	if (conf != NULL) {
	    fprintf(conf, PAM_D_MAGIC_HEADER);
	    fprintf(conf,
		    "#\n"
		    "# The PAM configuration file for the `%s' service\n"
		    "#\n", $1);
	}
    } else {
	fclose(conf);
	conf = fopen(filename, "a");
    }
    if (conf == NULL) {
	yyerror("trouble opening %s - aborting", filename);
	exit(1);
    }
    free(filename);

    /* $2 = module-type */
    fprintf(conf, "%-10s", $2);
    free($2);

    /* $3 = required etc. */
    {
	const char *trans;

	trans = old_to_new_ctrl_flag($3);
	free($3);
	fprintf(conf, " %-10s", trans);
    }

    /* $4 = module-path */
    fprintf(conf, " %s", $4);
    free($4);

    /* $5 = arguments */
    if ($5 != NULL) {
	fprintf(conf, " \\\n\t\t%s", $5);
	free($5);
    }

    /* end line */
    fprintf(conf, "\n");

    fclose(conf);
}
| error NL {
    yyerror("malformed line");
}
;

tokenls
: {
    $$=NULL;
}
| tokenls tok {
    int len;

    if ($1) {
	len = strlen($1) + strlen($2) + 2;
	$$ = malloc(len);
	sprintf($$,"%s %s",$1,$2);
	free($1);
	free($2);
    } else {
	$$ = $2;
    }
}
;

path
: TOK {
    /* XXX - this could be used to check if file present */
    $$ = strdup(yytext);
}

tok
: TOK {
    $$ = strdup(yytext);
}

%%

const char *old_to_new_ctrl_flag(const char *old)
{
    static const char *clist[] = {
	"requisite",
	"required",
	"sufficient",
	"optional",
	NULL,
    };
    int i;

    for (i=0; clist[i]; ++i) {
	if (strcasecmp(clist[i], old) == 0) {
	    break;
	}
    }

    return clist[i];
}

void yyerror(const char *format, ...)
{
    va_list args;

    fprintf(stderr, "line %d: ", current_line);
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
    fprintf(stderr, "\n");
}

int main(void)
{
    if (mkdir(PAM_D, PAM_D_MODE) != 0) {
	yyerror(PAM_D " already exists.. aborting");
	exit(1);
    }
    yyparse();
    exit(0);
}