1 /*
2 * termcap.c 1.1 20/7/87 agc Joypace Ltd
3 *
4 * Copyright Joypace Ltd, London, UK, 1987. All rights reserved.
5 * This file may be freely distributed provided that this notice
6 * remains attached.
7 *
8 * A public domain implementation of the termcap(3) routines.
9 */
10 #include "sh.h"
11
12 #if defined(_VMS_POSIX) || defined(_OSD_POSIX) || defined(__ANDROID__)
13 /* efth 1988-Apr-29
14
15 - Correct when TERM != name and TERMCAP is defined [tgetent]
16 - Correct the comparison for the terminal name [tgetent]
17 - Correct the value of ^x escapes [tgetstr]
18 - Added %r to reverse row/column [tgoto]
19
20 Paul Gillingwater <paul@actrix.gen.nz> July 1992
21 - Modified to allow terminal aliases in termcap file
22 - Uses TERMCAP environment variable for file only
23 */
24
25 #include <stdio.h>
26 #include <string.h>
27
28 #define CAPABLEN 2
29
30 #define ISSPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\r' || (c) == '\n')
31 #define ISDIGIT(x) ((x) >= '0' && (x) <= '9')
32
33 char *capab; /* the capability itself */
34
35 extern char *getenv(); /* new, improved getenv */
36 #ifndef fopen
37 extern FILE *fopen(); /* old fopen */
38 #endif
39
40 /*
41 * tgetent - get the termcap entry for terminal name, and put it
42 * in bp (which must be an array of 1024 chars). Returns 1 if
43 * termcap entry found, 0 if not found, and -1 if file not found.
44 */
45 int
tgetent(char * bp,char * name)46 tgetent(char *bp, char *name)
47 {
48 #ifdef __ANDROID__
49 /* Use static termcap entry since termcap file usually doesn't exist. */
50 capab = bp;
51 strcpy(bp,
52 "linux|linux console:"
53 ":am:eo:mi:ms:xn:xo:"
54 ":it#8:"
55 ":AL=\\E[%dL:DC=\\E[%dP:DL=\\E[%dM:IC=\\E[%d@:K2=\\E[G:al=\\E[L:"
56 ":bl=^G:cd=\\E[J:ce=\\E[K:cl=\\E[H\\E[J:cm=\\E[%i%d;%dH:cr=^M:"
57 ":cs=\\E[%i%d;%dr:ct=\\E[3g:dc=\\E[P:dl=\\E[M:do=^J:ec=\\E[%dX:"
58 ":ei=\\E[4l:ho=\\E[H:ic=\\E[@:im=\\E[4h:k1=\\E[[A:k2=\\E[[B:"
59 ":k3=\\E[[C:k4=\\E[[D:k5=\\E[[E:k6=\\E[17~:k7=\\E[18~:k8=\\E[19~:"
60 ":k9=\\E[20~:kD=\\E[3~:kI=\\E[2~:kN=\\E[6~:kP=\\E[5~:kb=\\177:"
61 ":kd=\\E[B:kh=\\E[1~:kl=\\E[D:kr=\\E[C:ku=\\E[A:le=^H:mb=\\E[5m:"
62 ":md=\\E[1m:me=\\E[0m:mh=\\E[2m:mr=\\E[7m:nd=\\E[C:nw=^M^J:"
63 ":rc=\\E8:sc=\\E7:se=\\E[27m:sf=^J:so=\\E[7m:sr=\\EM:st=\\EH:ta=^I:"
64 ":ue=\\E[24m:up=\\E[A:us=\\E[4m:vb=200\\E[?5h\\E[?5l:"
65 ":ve=\\E[?25h\\E[?0c:vi=\\E[?25l\\E[?1c:vs=\\E[?25h\\E[?0c:"
66 );
67 return(1);
68 #else
69 FILE *fp;
70 char *termfile;
71 char *cp,
72 *ptr, /* temporary pointer */
73 tmp[1024]; /* buffer for terminal name *//*FIXBUF*/
74 size_t len = strlen(name);
75
76 capab = bp;
77
78 /* Use TERMCAP to override default. */
79
80 termfile = getenv("TERMCAP");
81 if (termfile == NULL ) termfile = "/etc/termcap";
82
83 if ((fp = fopen(termfile, "r")) == (FILE *) NULL) {
84 fprintf(stderr, CGETS(31, 1,
85 "Can't open TERMCAP: [%s]\n"), termfile);
86 fprintf(stderr, CGETS(31, 2, "Can't open %s.\n"), termfile);
87 sleep(1);
88 return(-1);
89 }
90
91 while (fgets(bp, 1024, fp) != NULL) {
92 /* Any line starting with # or NL is skipped as a comment */
93 if ((*bp == '#') || (*bp == '\n')) continue;
94
95 /* Look for lines which end with two backslashes,
96 and then append the next line. */
97 while (*(cp = &bp[strlen(bp) - 2]) == '\\')
98 fgets(cp, 1024, fp);
99
100 /* Skip over any spaces or tabs */
101 for (++cp ; ISSPACE(*cp) ; cp++);
102
103 /* Make sure "name" matches exactly (efth) */
104
105 /* Here we might want to look at any aliases as well. We'll use
106 sscanf to look at aliases. These are delimited by '|'. */
107
108 sscanf(bp,"%[^|]",tmp);
109 if (strncmp(name, tmp, len) == 0) {
110 fclose(fp);
111 #ifdef DEBUG
112 fprintf(stderr, CGETS(31, 3, "Found %s in %s.\n"), name, termfile);
113 sleep(1);
114 #endif /* DEBUG */
115 return(1);
116 }
117 ptr = bp;
118 while ((ptr = strchr(ptr,'|')) != NULL) {
119 ptr++;
120 if (strchr(ptr,'|') == NULL) break;
121 sscanf(ptr,"%[^|]",tmp);
122 if (strncmp(name, tmp, len) == 0) {
123 fclose(fp);
124 #ifdef DEBUG
125 fprintf(stderr,CGETS(31, 3, "Found %s in %s.\n"), name, termfile);
126 sleep(1);
127 #endif /* DEBUG */
128 return(1);
129 }
130 }
131 }
132 /* If we get here, then we haven't found a match. */
133 fclose(fp);
134 #ifdef DEBUG
135 fprintf(stderr,CGETS(31, 4, "No match found for %s in file %s\n"),
136 name, termfile);
137 sleep(1);
138 #endif /* DEBUG */
139 return(0);
140 #endif /* ANDROID */
141 }
142
143 /*
144 * tgetnum - get the numeric terminal capability corresponding
145 * to id. Returns the value, -1 if invalid.
146 */
147 int
tgetnum(char * id)148 tgetnum(char *id)
149 {
150 char *cp;
151 int ret;
152
153 if ((cp = capab) == NULL || id == NULL)
154 return(-1);
155 while (*++cp != ':')
156 ;
157 for (++cp ; *cp ; cp++) {
158 while (ISSPACE(*cp))
159 cp++;
160 if (strncmp(cp, id, CAPABLEN) == 0) {
161 while (*cp && *cp != ':' && *cp != '#')
162 cp++;
163 if (*cp != '#')
164 return(-1);
165 for (ret = 0, cp++ ; *cp && ISDIGIT(*cp) ; cp++)
166 ret = ret * 10 + *cp - '0';
167 return(ret);
168 }
169 while (*cp && *cp != ':')
170 cp++;
171 }
172 return(-1);
173 }
174
175 /*
176 * tgetflag - get the boolean flag corresponding to id. Returns -1
177 * if invalid, 0 if the flag is not in termcap entry, or 1 if it is
178 * present.
179 */
180 int
tgetflag(char * id)181 tgetflag(char *id)
182 {
183 char *cp;
184
185 if ((cp = capab) == NULL || id == NULL)
186 return(-1);
187 while (*++cp != ':')
188 ;
189 for (++cp ; *cp ; cp++) {
190 while (ISSPACE(*cp))
191 cp++;
192 if (strncmp(cp, id, CAPABLEN) == 0)
193 return(1);
194 while (*cp && *cp != ':')
195 cp++;
196 }
197 return(0);
198 }
199
200 /*
201 * tgetstr - get the string capability corresponding to id and place
202 * it in area (advancing area at same time). Expand escape sequences
203 * etc. Returns the string, or NULL if it can't do it.
204 */
205 char *
tgetstr(char * id,char ** area)206 tgetstr(char *id, char **area)
207 {
208 char *cp;
209 char *ret;
210 int i;
211
212 if ((cp = capab) == NULL || id == NULL)
213 return(NULL);
214 while (*++cp != ':')
215 ;
216 for (++cp ; *cp ; cp++) {
217 while (ISSPACE(*cp))
218 cp++;
219 if (strncmp(cp, id, CAPABLEN) == 0) {
220 while (*cp && *cp != ':' && *cp != '=')
221 cp++;
222 if (*cp != '=')
223 return(NULL);
224 for (ret = *area, cp++; *cp && *cp != ':' ;
225 (*area)++, cp++)
226 switch(*cp) {
227 case '^' :
228 **area = *++cp - '@'; /* fix (efth)*/
229 break;
230 case '\\' :
231 switch(*++cp) {
232 case 'E' :
233 **area = CTL_ESC('\033');
234 break;
235 case 'n' :
236 **area = '\n';
237 break;
238 case 'r' :
239 **area = '\r';
240 break;
241 case 't' :
242 **area = '\t';
243 break;
244 case 'b' :
245 **area = '\b';
246 break;
247 case 'f' :
248 **area = '\f';
249 break;
250 case '0' :
251 case '1' :
252 case '2' :
253 case '3' :
254 for (i=0 ; *cp && ISDIGIT(*cp) ;
255 cp++)
256 i = i * 8 + *cp - '0';
257 **area = i;
258 cp--;
259 break;
260 case '^' :
261 case '\\' :
262 **area = *cp;
263 break;
264 }
265 break;
266 default :
267 **area = *cp;
268 }
269 *(*area)++ = '\0';
270 return(ret);
271 }
272 while (*cp && *cp != ':')
273 cp++;
274 }
275 return(NULL);
276 }
277
278 /*
279 * tgoto - given the cursor motion string cm, make up the string
280 * for the cursor to go to (destcol, destline), and return the string.
281 * Returns "OOPS" if something's gone wrong, or the string otherwise.
282 */
283 char *
tgoto(char * cm,int destcol,int destline)284 tgoto(char *cm, int destcol, int destline)
285 {
286 char *rp;
287 static char ret[24];
288 int incr = 0;
289 int argno = 0, numval;
290
291 for (rp = ret ; *cm ; cm++) {
292 switch(*cm) {
293 case '%' :
294 switch(*++cm) {
295 case '+' :
296 numval = (argno == 0 ? destline : destcol);
297 argno = 1 - argno;
298 *rp++ = numval + incr + *++cm;
299 break;
300
301 case '%' :
302 *rp++ = '%';
303 break;
304
305 case 'i' :
306 incr = 1;
307 break;
308
309 case 'd' :
310 numval = (argno == 0 ? destline : destcol);
311 numval += incr;
312 argno = 1 - argno;
313 *rp++ = '0' + (numval/10);
314 *rp++ = '0' + (numval%10);
315 break;
316
317 case 'r' :
318 argno = 1;
319 break;
320 }
321
322 break;
323 default :
324 *rp++ = *cm;
325 }
326 }
327 *rp = '\0';
328 return(ret);
329 }
330
331 /*
332 * tputs - put the string cp out onto the terminal, using the function
333 * outc. This should do padding for the terminal, but I can't find a
334 * terminal that needs padding at the moment...
335 */
336 int
tputs(char * cp,int affcnt,int (* outc)())337 tputs(char *cp, int affcnt, int (*outc)())
338 {
339 unsigned long delay = 0;
340
341 if (cp == NULL)
342 return(1);
343 /* do any padding interpretation - left null for MINIX just now */
344 for (delay = 0; *cp && ISDIGIT(*cp) ; cp++)
345 delay = delay * 10 + *cp - '0';
346 while (*cp)
347 (*outc)(*cp++);
348 #ifdef _OSD_POSIX
349 usleep(delay*100); /* strictly spoken, it should be *1000 */
350 #endif
351 return(1);
352 }
353 #endif /* _VMS_POSIX || _OSD_POSIX */
354