Commit | Line | Data |
---|---|---|
bb0cfa24 | 1 | /* |
06c5d283 KB |
2 | * Copyright (c) 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
af359dea C |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
bb0cfa24 DF |
32 | */ |
33 | ||
2ce81398 | 34 | #if defined(LIBC_SCCS) && !defined(lint) |
af359dea | 35 | static char sccsid[] = "@(#)getttyent.c 5.10 (Berkeley) 3/23/91"; |
06c5d283 | 36 | #endif /* LIBC_SCCS and not lint */ |
d011ae29 | 37 | |
06c5d283 | 38 | #include <ttyent.h> |
d011ae29 | 39 | #include <stdio.h> |
06c5d283 | 40 | #include <ctype.h> |
6ebcb998 | 41 | #include <string.h> |
d011ae29 | 42 | |
9c787b65 | 43 | static char zapchar; |
06c5d283 | 44 | static FILE *tf; |
d011ae29 | 45 | |
06c5d283 KB |
46 | struct ttyent * |
47 | getttynam(tty) | |
c5980113 | 48 | const char *tty; |
d011ae29 | 49 | { |
06c5d283 KB |
50 | register struct ttyent *t; |
51 | ||
52 | setttyent(); | |
53 | while (t = getttyent()) | |
54 | if (!strcmp(tty, t->ty_name)) | |
55 | break; | |
0d344169 MK |
56 | endttyent(); |
57 | return (t); | |
d011ae29 RC |
58 | } |
59 | ||
06c5d283 KB |
60 | struct ttyent * |
61 | getttyent() | |
d011ae29 | 62 | { |
06c5d283 KB |
63 | static struct ttyent tty; |
64 | register int c; | |
65 | register char *p; | |
66 | #define MAXLINELENGTH 100 | |
67 | static char line[MAXLINELENGTH]; | |
c5980113 | 68 | static char *skip(), *value(); |
06c5d283 KB |
69 | |
70 | if (!tf && !setttyent()) | |
0d344169 | 71 | return (NULL); |
7baa3ecd KB |
72 | for (;;) { |
73 | if (!fgets(p = line, sizeof(line), tf)) | |
0d344169 | 74 | return (NULL); |
06c5d283 | 75 | /* skip lines that are too big */ |
7baa3ecd | 76 | if (!index(p, '\n')) { |
06c5d283 KB |
77 | while ((c = getc(tf)) != '\n' && c != EOF) |
78 | ; | |
79 | continue; | |
80 | } | |
7baa3ecd KB |
81 | while (isspace(*p)) |
82 | ++p; | |
83 | if (*p && *p != '#') | |
84 | break; | |
85 | } | |
06c5d283 KB |
86 | |
87 | zapchar = 0; | |
88 | tty.ty_name = p; | |
89 | p = skip(p); | |
90 | if (!*(tty.ty_getty = p)) | |
91 | tty.ty_getty = tty.ty_type = NULL; | |
92 | else { | |
93 | p = skip(p); | |
94 | if (!*(tty.ty_type = p)) | |
95 | tty.ty_type = NULL; | |
96 | else | |
97 | p = skip(p); | |
d011ae29 | 98 | } |
06c5d283 KB |
99 | tty.ty_status = 0; |
100 | tty.ty_window = NULL; | |
101 | ||
102 | #define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace(p[sizeof(e) - 1]) | |
103 | #define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '=' | |
104 | for (; *p; p = skip(p)) { | |
105 | if (scmp(_TTYS_OFF)) | |
106 | tty.ty_status &= ~TTY_ON; | |
107 | else if (scmp(_TTYS_ON)) | |
108 | tty.ty_status |= TTY_ON; | |
109 | else if (scmp(_TTYS_SECURE)) | |
110 | tty.ty_status |= TTY_SECURE; | |
111 | else if (vcmp(_TTYS_WINDOW)) | |
112 | tty.ty_window = value(p); | |
113 | else | |
114 | break; | |
115 | } | |
116 | ||
117 | if (zapchar == '#' || *p == '#') | |
118 | while ((c = *++p) == ' ' || c == '\t') | |
119 | ; | |
120 | tty.ty_comment = p; | |
121 | if (*p == 0) | |
122 | tty.ty_comment = 0; | |
123 | if (p = index(p, '\n')) | |
124 | *p = '\0'; | |
0d344169 | 125 | return (&tty); |
d011ae29 RC |
126 | } |
127 | ||
06c5d283 | 128 | #define QUOTED 1 |
18971fdd RC |
129 | |
130 | /* | |
06c5d283 KB |
131 | * Skip over the current field, removing quotes, and return a pointer to |
132 | * the next field. | |
18971fdd | 133 | */ |
d011ae29 RC |
134 | static char * |
135 | skip(p) | |
18971fdd | 136 | register char *p; |
d011ae29 | 137 | { |
06c5d283 KB |
138 | register char *t; |
139 | register int c, q; | |
d011ae29 | 140 | |
06c5d283 | 141 | for (q = 0, t = p; (c = *p) != '\0'; p++) { |
18971fdd RC |
142 | if (c == '"') { |
143 | q ^= QUOTED; /* obscure, but nice */ | |
144 | continue; | |
145 | } | |
9c787b65 MK |
146 | if (q == QUOTED && *p == '\\' && *(p+1) == '"') |
147 | p++; | |
148 | *t++ = *p; | |
18971fdd RC |
149 | if (q == QUOTED) |
150 | continue; | |
d011ae29 | 151 | if (c == '#') { |
9c787b65 MK |
152 | zapchar = c; |
153 | *p = 0; | |
d011ae29 RC |
154 | break; |
155 | } | |
156 | if (c == '\t' || c == ' ' || c == '\n') { | |
9c787b65 MK |
157 | zapchar = c; |
158 | *p++ = 0; | |
d011ae29 RC |
159 | while ((c = *p) == '\t' || c == ' ' || c == '\n') |
160 | p++; | |
161 | break; | |
162 | } | |
d011ae29 | 163 | } |
9c787b65 | 164 | *--t = '\0'; |
0d344169 | 165 | return (p); |
d011ae29 RC |
166 | } |
167 | ||
18971fdd RC |
168 | static char * |
169 | value(p) | |
170 | register char *p; | |
171 | { | |
0d344169 MK |
172 | |
173 | return ((p = index(p, '=')) ? ++p : NULL); | |
18971fdd RC |
174 | } |
175 | ||
c5980113 | 176 | int |
06c5d283 | 177 | setttyent() |
d011ae29 | 178 | { |
0d344169 | 179 | |
06c5d283 KB |
180 | if (tf) { |
181 | (void)rewind(tf); | |
0d344169 | 182 | return (1); |
06c5d283 | 183 | } else if (tf = fopen(_PATH_TTYS, "r")) |
0d344169 MK |
184 | return (1); |
185 | return (0); | |
06c5d283 | 186 | } |
d011ae29 | 187 | |
c5980113 | 188 | int |
06c5d283 KB |
189 | endttyent() |
190 | { | |
191 | int rval; | |
192 | ||
193 | if (tf) { | |
194 | rval = !(fclose(tf) == EOF); | |
195 | tf = NULL; | |
0d344169 | 196 | return (rval); |
d011ae29 | 197 | } |
0d344169 | 198 | return (1); |
d011ae29 | 199 | } |