1 /****************************************************************************
2 * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 ****************************************************************************/
36 * Termcap compatibility support
38 * If your OS integrator didn't install a terminfo database, you can call
39 * _nc_read_termcap_entry() to support reading and translating capabilities
40 * from the system termcap file. This is a kludge; it will bulk up and slow
41 * down every program that uses ncurses, and translated termcap entries cannot
42 * use full terminfo capabilities. Don't use it unless you absolutely have to;
43 * instead, get your system people to run tic(1) from root on the terminfo
44 * master included with ncurses to translate it into a terminfo database.
46 * If USE_GETCAP is enabled, we use what is effectively a copy of the 4.4BSD
47 * getcap code to fetch entries. There are disadvantages to this; mainly that
48 * getcap(3) does its own resolution, meaning that entries read in in this way
49 * can't reference the terminfo tree. The only thing it buys is faster startup
50 * time, getcap(3) is much faster than our tic parser.
53 #include <curses.priv.h>
56 #include <sys/types.h>
59 MODULE_ID("$Id: read_termcap.c,v 1.89 2013/12/15 00:32:43 tom Exp $")
64 #define TC_NOT_FOUND -1
66 #define TC_REF_LOOP -3
67 #define TC_UNRESOLVED -4 /* this is not returned by BSD cgetent */
69 static NCURSES_CONST char *
72 NCURSES_CONST char *result;
74 if (!use_terminfo_vars() || (result = getenv("TERMPATH")) == 0)
76 TR(TRACE_DATABASE, ("TERMPATH is %s", result));
82 * getcap(), cgetent(), etc., are BSD functions. A copy of those was added to
83 * this file in November 1995, derived from the BSD4.4 Lite sources.
85 * The initial adaptation uses 518 lines from that source.
86 * The current source (in 2009) uses 183 lines of BSD4.4 Lite (441 ignoring
92 #define _nc_cgetcap cgetcap
93 #define _nc_cgetent(buf, oline, db_array, name) cgetent(buf, db_array, name)
94 #define _nc_cgetmatch cgetmatch
95 #define _nc_cgetset cgetset
97 static int _nc_cgetmatch(char *, const char *);
98 static int _nc_getent(char **, unsigned *, int *, int, char **, int, const char
100 static int _nc_nfcmp(const char *, char *);
103 * Copyright (c) 1992, 1993
104 * The Regents of the University of California. All rights reserved.
106 * This code is derived from software contributed to Berkeley by
107 * Casey Leedom of Lawrence Livermore National Laboratory.
109 * Redistribution and use in source and binary forms, with or without
110 * modification, are permitted provided that the following conditions
112 * 1. Redistributions of source code must retain the above copyright
113 * notice, this list of conditions and the following disclaimer.
114 * 2. Redistributions in binary form must reproduce the above copyright
115 * notice, this list of conditions and the following disclaimer in the
116 * documentation and/or other materials provided with the distribution.
117 * 3. Neither the name of the University nor the names of its contributors
118 * may be used to endorse or promote products derived from this software
119 * without specific prior written permission.
121 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
122 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
123 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
124 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
125 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
126 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
127 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
128 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
129 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
130 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
134 /* static char sccsid[] = "@(#)getcap.c 8.3 (Berkeley) 3/25/94"; */
138 #define MAX_RECURSION 32 /* maximum getent recursion */
140 static size_t topreclen; /* toprec length */
141 static char *toprec; /* Additional record specified by cgetset() */
142 static int gottoprec; /* Flag indicating retrieval of toprecord */
145 * Cgetset() allows the addition of a user specified buffer to be added to the
146 * database array, in effect "pushing" the buffer on top of the virtual
147 * database. 0 is returned on success, -1 on failure.
150 _nc_cgetset(const char *ent)
153 FreeIfNeeded(toprec);
158 topreclen = strlen(ent);
159 if ((toprec = typeMalloc(char, topreclen + 1)) == 0) {
164 _nc_STRCPY(toprec, ent, topreclen);
169 * Cgetcap searches the capability record buf for the capability cap with type
170 * `type'. A pointer to the value of cap is returned on success, 0 if the
171 * requested capability couldn't be found.
173 * Specifying a type of ':' means that nothing should follow cap (:cap:). In
174 * this case a pointer to the terminating ':' or NUL will be returned if cap is
177 * If (cap, '@') or (cap, terminator, '@') is found before (cap, terminator)
181 _nc_cgetcap(char *buf, const char *cap, int type)
183 register const char *cp;
189 * Skip past the current capability field - it's either the
190 * name field if this is the first time through the loop, or
191 * the remainder of a field whose name failed to match cap.
196 else if (*bp++ == ':')
201 * Try to match (cap, type) in buf.
203 for (cp = cap; *cp == *bp && *bp != '\0'; cp++, bp++)
210 if (*bp != '\0' && *bp != ':')
217 return (*bp == '@' ? 0 : bp);
223 * Cgetent extracts the capability record name from the NULL terminated file
224 * array db_array and returns a pointer to a malloc'd copy of it in buf. Buf
225 * must be retained through all subsequent calls to cgetcap, cgetnum, cgetflag,
226 * and cgetstr, but may then be freed.
230 * positive # on success (i.e., the index in db_array)
231 * TC_NOT_FOUND if the requested record couldn't be found
232 * TC_SYS_ERR if a system error was encountered (e.g.,couldn't open a file)
233 * TC_REF_LOOP if a potential reference loop is detected
234 * TC_UNRESOLVED if we had too many recurrences to resolve
237 _nc_cgetent(char **buf, int *oline, char **db_array, const char *name)
241 return (_nc_getent(buf, &dummy, oline, 0, db_array, -1, name, 0, 0));
245 * Getent implements the functions of cgetent. If fd is non-negative,
246 * *db_array has already been opened and fd is the open file descriptor. We
247 * do this to save time and avoid using up file descriptors for tc=
250 * Getent returns the same success/failure codes as cgetent. On success, a
251 * pointer to a malloc'd capability record with all tc= capabilities fully
252 * expanded and its length (not including trailing ASCII NUL) are left in
256 * + Allocate memory incrementally as needed in chunks of size BFRAG
257 * for capability buffer.
258 * + Recurse for each tc=name and interpolate result. Stop when all
259 * names interpolated, a name can't be found, or depth exceeds
262 #define DOALLOC(size) typeRealloc(char, size, record)
265 char **cap, /* termcap-content */
266 unsigned *len, /* length, needed for recursion */
267 int *beginning, /* line-number at match */
268 int in_array, /* index in 'db_array[] */
269 char **db_array, /* list of files to search */
275 register char *r_end, *rp;
283 * Return with ``loop detected'' error if we've recurred more than
284 * MAX_RECURSION times.
286 if (depth > MAX_RECURSION)
287 return (TC_REF_LOOP);
290 * Check if we have a top record from cgetset().
292 if (depth == 0 && toprec != 0 && _nc_cgetmatch(toprec, name) == 0) {
293 if ((record = DOALLOC(topreclen + BFRAG)) == 0) {
297 _nc_STRCPY(record, toprec, topreclen + BFRAG);
298 rp = record + topreclen + 1;
305 * Allocate first chunk of memory.
307 if ((record = DOALLOC(BFRAG)) == 0) {
311 rp = r_end = record + BFRAG;
315 * Loop through database array until finding the record.
317 for (current = in_array; db_array[current] != 0; current++) {
321 * Open database if not already open.
324 (void) lseek(fd, (off_t) 0, SEEK_SET);
325 } else if ((_nc_access(db_array[current], R_OK) < 0)
326 || (fd = open(db_array[current], O_RDONLY, 0)) < 0) {
327 /* No error on unfound file. */
338 * Find the requested capability record ...
342 register char *b_end = buf;
343 register char *bp = buf;
348 * There is always room for one more character in record.
349 * R_end always points just past end of record.
350 * Rp always points just past last character in record.
351 * B_end always points just past last character in buf.
352 * Bp always points at next character in buf.
356 int first = lineno + 1;
359 * Read in a line implementing (\, newline)
367 n = read(fd, buf, sizeof(buf));
387 * Unlike BSD 4.3, this ignores a backslash at the
388 * end of a comment-line. That makes it consistent
389 * with the rest of ncurses -TD
393 || *(rp - 1) != '\\')
399 * Enforce loop invariant: if no room
400 * left in record buffer, try to get
408 newsize = r_end - record + BFRAG;
409 record = DOALLOC(newsize);
416 r_end = record + newsize;
420 /* loop invariant lets us do this */
424 * If encountered eof check next file.
430 * Toss blank lines and comments.
432 if (*record == '\0' || *record == '#')
436 * See if this is the record we want ...
438 if (_nc_cgetmatch(record, name) == 0
440 || !_nc_nfcmp(nfield, record))) {
443 break; /* found it! */
453 return (TC_NOT_FOUND);
458 * Got the capability record, but now we have to expand all tc=name
459 * references in it ...
462 register char *newicap, *s;
463 register int newilen;
465 int diff, iret, tclen, oline;
466 char *icap = 0, *scan, *tc, *tcstart, *tcend;
470 * There is room for one more character in record.
471 * R_end points just past end of record.
472 * Rp points just past last character in record.
473 * Scan points at remainder of record that needs to be
474 * scanned for tc=name constructs.
477 tc_not_resolved = FALSE;
479 if ((tc = _nc_cgetcap(scan, "tc", '=')) == 0) {
484 * Find end of tc=name and stomp on the trailing `:'
485 * (if present) so we can use it to call ourselves.
499 iret = _nc_getent(&icap, &ilen, &oline, current, db_array, fd,
501 newicap = icap; /* Put into a register. */
503 if (iret != TC_SUCCESS) {
505 if (iret < TC_NOT_FOUND) {
512 if (iret == TC_UNRESOLVED) {
513 tc_not_resolved = TRUE;
514 /* couldn't resolve tc */
515 } else if (iret == TC_NOT_FOUND) {
518 tc_not_resolved = TRUE;
523 /* not interested in name field of tc'ed record */
525 while (*s != '\0' && *s++ != ':') ;
526 newilen -= s - newicap;
529 /* make sure interpolated record is `:'-terminated */
531 if (*(s - 1) != ':') {
532 *s = ':'; /* overwrite NUL with : */
537 * Make sure there's enough room to insert the
540 diff = newilen - tclen;
541 if (diff >= r_end - rp) {
542 unsigned pos, tcpos, tcposend;
546 newsize = r_end - record + diff + BFRAG;
547 tcpos = tcstart - record;
548 tcposend = tcend - record;
549 record = DOALLOC(newsize);
557 r_end = record + newsize;
559 tcstart = record + tcpos;
560 tcend = record + tcposend;
564 * Insert tc'ed record into our record.
566 s = tcstart + newilen;
567 memmove(s, tcend, (size_t) (rp - tcend));
568 memmove(tcstart, newicap, (size_t) newilen);
573 * Start scan on `:' so next cgetcap works properly
574 * (cgetcap always skips first field).
581 * Close file (if we opened it), give back any extra memory, and
582 * return capability, length and success.
586 *len = rp - record - 1; /* don't count NUL */
588 if ((record = DOALLOC((size_t) (rp - record))) == 0) {
595 if (tc_not_resolved) {
596 return (TC_UNRESOLVED);
602 * Cgetmatch will return 0 if name is one of the names of the capability
603 * record buf, -1 if not.
606 _nc_cgetmatch(char *buf, const char *name)
608 register const char *np;
612 * Start search at beginning of record.
617 * Try to match a record name.
622 if (*bp == '|' || *bp == ':' || *bp == '\0')
626 } else if (*bp++ != *np++) {
632 * Match failed, skip to next name in record.
634 bp--; /* a '|' or ':' may have stopped the match */
636 if (*bp == '\0' || *bp == ':')
637 return (-1); /* match failed totally */
638 else if (*bp++ == '|')
639 break; /* found next name */
645 * Compare name field of record.
648 _nc_nfcmp(const char *nf, char *rec)
653 for (cp = rec; *cp != ':'; cp++) ;
657 ret = strcmp(nf, rec);
662 #endif /* HAVE_BSD_CGETENT */
665 * Since ncurses provides its own 'tgetent()', we cannot use the native one.
666 * So we reproduce the logic to get down to cgetent() -- or our cut-down
667 * version of that -- to circumvent the problem of configuring against the
670 #define USE_BSD_TGETENT 1
674 * Copyright (c) 1980, 1993
675 * The Regents of the University of California. All rights reserved.
677 * Redistribution and use in source and binary forms, with or without
678 * modification, are permitted provided that the following conditions
680 * 1. Redistributions of source code must retain the above copyright
681 * notice, this list of conditions and the following disclaimer.
682 * 2. Redistributions in binary form must reproduce the above copyright
683 * notice, this list of conditions and the following disclaimer in the
684 * documentation and/or other materials provided with the distribution.
685 * 3. All advertising materials mentioning features or use of this software
686 * must display the following acknowledgment:
687 * This product includes software developed by the University of
688 * California, Berkeley and its contributors.
689 * 4. Neither the name of the University nor the names of its contributors
690 * may be used to endorse or promote products derived from this software
691 * without specific prior written permission.
693 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
694 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
695 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
696 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
697 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
698 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
699 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
700 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
701 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
702 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
706 /* static char sccsid[] = "@(#)termcap.c 8.1 (Berkeley) 6/4/93" */
708 #define PBUFSIZ 512 /* max length of filename path */
709 #define PVECSIZ 32 /* max number of names in path */
710 #define TBUFSIZ (2048*2)
713 * On entry, srcp points to a non ':' character which is the beginning of the
714 * token, if any. We'll try to return a string that doesn't end with a ':'.
717 get_tc_token(char **srcp, int *endp)
725 for (s = base = *srcp; *s != '\0';) {
730 } else if (*s++ == '\n') {
731 while (isspace(UChar(*s)))
736 } else if (ch == ':') {
745 } else if (isgraph(UChar(ch))) {
750 /* malformed entry may end without a ':' */
751 if (tok == 0 && found) {
759 copy_tc_token(char *dst, const char *src, size_t len)
763 while ((ch = *src++) != '\0') {
764 if (ch == '\\' && *src == '\n') {
765 while (isspace(UChar(*src)))
779 * Get an entry for terminal name in buffer bp from the termcap file.
782 _nc_tgetent(char *bp, char **sourcename, int *lineno, const char *name)
784 static char *the_source;
789 CGETENT_CONST char **fname;
792 char pathbuf[PBUFSIZ]; /* holds raw path of filenames */
793 CGETENT_CONST char *pathvec[PVECSIZ]; /* point to names in pathbuf */
794 NCURSES_CONST char *termpath;
800 cp = use_terminfo_vars()? getenv("TERMCAP") : NULL;
803 * TERMCAP can have one of two things in it. It can be the name of a file
804 * to use instead of /etc/termcap. In this case it better start with a
805 * "/". Or it can be an entry to use so we don't have to read the file.
806 * In this case it has to already have the newlines crunched out. If
807 * TERMCAP does not hold a file name then a path of names is searched
808 * instead. The path is found in the TERMPATH variable, or becomes
809 * "$HOME/.termcap /etc/termcap" if no TERMPATH exists.
811 _nc_str_init(&desc, pathbuf, sizeof(pathbuf));
813 _nc_safe_strcpy(&desc, get_termpath());
814 } else if (!_nc_is_abs_path(cp)) { /* TERMCAP holds an entry */
815 if ((termpath = get_termpath()) != 0) {
816 _nc_safe_strcat(&desc, termpath);
820 if ((home = getenv("HOME")) != 0 && *home != '\0'
821 && strchr(home, ' ') == 0
822 && strlen(home) < sizeof(temp) - 10) { /* setup path */
823 _nc_SPRINTF(temp, _nc_SLIMIT(sizeof(temp))
824 "%s/", home); /* $HOME first */
826 /* if no $HOME look in current directory */
827 _nc_STRCAT(temp, ".termcap", sizeof(temp));
828 _nc_safe_strcat(&desc, temp);
829 _nc_safe_strcat(&desc, " ");
830 _nc_safe_strcat(&desc, get_termpath());
832 } else { /* user-defined name in TERMCAP */
833 _nc_safe_strcat(&desc, cp); /* still can be tokenized */
836 *fname++ = pathbuf; /* tokenize path into vector of names */
838 if (*p == ' ' || *p == NCURSES_PATHSEP) {
841 if (*p != ' ' && *p != NCURSES_PATHSEP)
846 if (fname >= pathvec + PVECSIZ) {
852 *fname = 0; /* mark end of vector */
853 #if !HAVE_BSD_CGETENT
854 (void) _nc_cgetset(0);
856 if (_nc_is_abs_path(cp)) {
857 if (_nc_cgetset(cp) < 0) {
862 i = _nc_cgetent(&dummy, lineno, pathvec, name);
864 /* ncurses' termcap-parsing routines cannot handle multiple adjacent
865 * empty fields, and mistakenly use the last valid cap entry instead of
866 * the first (breaks tc= includes)
877 while (!endflag && (tok = get_tc_token(&ps, &endflag)) != 0) {
880 for (n = 1; n < count; n++) {
888 if (ignore != TRUE) {
890 pd = copy_tc_token(pd, tok, (size_t) (TBUFSIZ - (2 + pd - bp)));
902 FreeIfNeeded(the_source);
905 /* This is not related to the BSD cgetent(), but to fake up a suitable
906 * filename for ncurses' error reporting. (If we are not using BSD
907 * cgetent, then it is the actual filename).
913 _nc_str_init(&desc, temp, sizeof(temp));
914 _nc_safe_strcpy(&desc, pathvec[i]);
915 _nc_safe_strcat(&desc, ".db");
916 if (_nc_access(temp, R_OK) == 0) {
917 _nc_safe_strcpy(&desc, pathvec[i]);
919 if ((the_source = strdup(temp)) != 0)
920 *sourcename = the_source;
922 if ((the_source = strdup(pathvec[i])) != 0)
923 *sourcename = the_source;
929 #endif /* USE_BSD_TGETENT */
930 #endif /* USE_GETCAP */
935 * Add a filename to the list in 'termpaths[]', checking that we really have
936 * a right to open the file.
940 add_tc(char *termpaths[], char *path, int count)
942 char *save = strchr(path, NCURSES_PATHSEP);
946 && _nc_access(path, R_OK) == 0) {
947 termpaths[count++] = path;
948 TR(TRACE_DATABASE, ("Adding termpath %s", path));
950 termpaths[count] = 0;
952 *save = NCURSES_PATHSEP;
955 #define ADD_TC(path, count) filecount = add_tc(termpaths, path, count)
956 #endif /* !USE_GETCAP */
959 _nc_read_termcap_entry(const char *const tn, TERMTYPE *const tp)
961 int found = TGETENT_NO;
964 char cwd_buf[PATH_MAX];
967 char *p, tc[TBUFSIZ];
972 TR(TRACE_DATABASE, ("read termcap entry for %s", tn));
975 || strcmp(tn, ".") == 0
976 || strcmp(tn, "..") == 0
977 || _nc_pathlast(tn) != 0) {
978 TR(TRACE_DATABASE, ("illegal or missing entry name '%s'", tn));
982 if (use_terminfo_vars() && (p = getenv("TERMCAP")) != 0
983 && !_nc_is_abs_path(p) && _nc_name_match(p, tn, "|:")) {
984 /* TERMCAP holds a termcap entry */
985 strncpy(tc, p, sizeof(tc) - 1);
986 tc[sizeof(tc) - 1] = '\0';
987 _nc_set_source("TERMCAP");
989 /* we're using getcap(3) */
990 if ((status = _nc_tgetent(tc, &source, &lineno, tn)) < 0)
991 return (status == TC_NOT_FOUND ? TGETENT_NO : TGETENT_ERR);
993 _nc_curr_line = lineno;
994 _nc_set_source(source);
996 _nc_read_entry_source((FILE *) 0, tc, FALSE, TRUE, NULLHOOK);
999 * Here is what the 4.4BSD termcap(3) page prescribes:
1001 * It will look in the environment for a TERMCAP variable. If found, and
1002 * the value does not begin with a slash, and the terminal type name is the
1003 * same as the environment string TERM, the TERMCAP string is used instead
1004 * of reading a termcap file. If it does begin with a slash, the string is
1005 * used as a path name of the termcap file to search. If TERMCAP does not
1006 * begin with a slash and name is different from TERM, tgetent() searches
1007 * the files $HOME/.termcap and /usr/share/misc/termcap, in that order,
1008 * unless the environment variable TERMPATH exists, in which case it
1009 * specifies a list of file pathnames (separated by spaces or colons) to be
1012 * It goes on to state:
1014 * Whenever multiple files are searched and a tc field occurs in the
1015 * requested entry, the entry it names must be found in the same file or
1016 * one of the succeeding files.
1018 * However, this restriction is relaxed in ncurses; tc references to
1019 * previous files are permitted.
1021 * This routine returns 1 if an entry is found, 0 if not found, and -1 if
1022 * the database is not accessible.
1025 char *tc, *termpaths[MAXPATHS];
1028 bool use_buffer = FALSE;
1031 char pathbuf[PATH_MAX];
1034 struct stat test_stat[MAXPATHS];
1036 termpaths[filecount] = 0;
1037 if (use_terminfo_vars() && (tc = getenv("TERMCAP")) != 0) {
1038 if (_nc_is_abs_path(tc)) { /* interpret as a filename */
1041 } else if (_nc_name_match(tc, tn, "|:")) { /* treat as a capability file */
1044 _nc_SLIMIT(sizeof(tc_buf))
1045 "%.*s\n", (int) sizeof(tc_buf) - 2, tc);
1050 if (normal) { /* normal case */
1051 char envhome[PATH_MAX], *h;
1053 copied = strdup(get_termpath());
1054 for (cp = copied; *cp; cp++) {
1055 if (*cp == NCURSES_PATHSEP)
1057 else if (cp == copied || cp[-1] == '\0') {
1058 ADD_TC(cp, filecount);
1062 #define PRIVATE_CAP "%s/.termcap"
1064 if (use_terminfo_vars() && (h = getenv("HOME")) != NULL && *h != '\0'
1065 && (strlen(h) + sizeof(PRIVATE_CAP)) < PATH_MAX) {
1066 /* user's .termcap, if any, should override it */
1067 _nc_STRCPY(envhome, h, sizeof(envhome));
1068 _nc_SPRINTF(pathbuf, _nc_SLIMIT(sizeof(pathbuf))
1069 PRIVATE_CAP, envhome);
1070 ADD_TC(pathbuf, filecount);
1075 * Probably /etc/termcap is a symlink to /usr/share/misc/termcap.
1076 * Avoid reading the same file twice.
1079 for (j = 0; j < filecount; j++) {
1081 if (stat(termpaths[j], &test_stat[j]) != 0
1082 || !S_ISREG(test_stat[j].st_mode)) {
1085 for (k = 0; k < j; k++) {
1086 if (test_stat[k].st_dev == test_stat[j].st_dev
1087 && test_stat[k].st_ino == test_stat[j].st_ino) {
1094 TR(TRACE_DATABASE, ("Path %s is a duplicate", termpaths[j]));
1095 for (k = j + 1; k < filecount; k++) {
1096 termpaths[k - 1] = termpaths[k];
1097 test_stat[k - 1] = test_stat[k];
1105 /* parse the sources */
1107 _nc_set_source("TERMCAP");
1110 * We don't suppress warning messages here. The presumption is
1111 * that since it's just a single entry, they won't be a pain.
1113 _nc_read_entry_source((FILE *) 0, tc_buf, FALSE, FALSE, NULLHOOK);
1117 for (i = 0; i < filecount; i++) {
1119 TR(TRACE_DATABASE, ("Looking for %s in %s", tn, termpaths[i]));
1120 if (_nc_access(termpaths[i], R_OK) == 0
1121 && (fp = fopen(termpaths[i], "r")) != (FILE *) 0) {
1122 _nc_set_source(termpaths[i]);
1125 * Suppress warning messages. Otherwise you get 400 lines of
1126 * crap from archaic termcap files as ncurses complains about
1127 * all the obsolete capabilities.
1129 _nc_read_entry_source(fp, (char *) 0, FALSE, TRUE, NULLHOOK);
1137 #endif /* USE_GETCAP */
1140 return (TGETENT_ERR);
1142 /* resolve all use references */
1143 _nc_resolve_uses2(TRUE, FALSE);
1145 /* find a terminal matching tn, if we can */
1146 #if USE_GETCAP_CACHE
1147 if (getcwd(cwd_buf, sizeof(cwd_buf)) != 0) {
1148 _nc_set_writedir((char *) 0); /* note: this does a chdir */
1150 for_entry_list(ep) {
1151 if (_nc_name_match(ep->tterm.term_names, tn, "|:")) {
1153 * Make a local copy of the terminal capabilities, delinked
1157 _nc_free_entry(_nc_head, &(ep->tterm));
1160 * OK, now try to write the type to user's terminfo directory.
1161 * Next time he loads this, it will come through terminfo.
1163 * Advantage: Second and subsequent fetches of this entry will
1166 * Disadvantage: After the first time a termcap type is loaded
1167 * by its user, editing it in the /etc/termcap file, or in
1168 * TERMCAP, or in a local ~/.termcap, will be ineffective
1169 * unless the terminfo entry is explicitly removed.
1171 #if USE_GETCAP_CACHE
1172 (void) _nc_write_entry(tp);
1174 found = TGETENT_YES;
1178 #if USE_GETCAP_CACHE
1187 NCURSES_EXPORT(void)
1188 _nc_read_termcap(void);
1189 NCURSES_EXPORT(void)
1190 _nc_read_termcap(void)
1193 #endif /* PURE_TERMINFO */