/****************************************************************************
- * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2015,2016 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
/*
* read_entry.c -- Routine for reading in a compiled terminfo file
- *
*/
#include <curses.priv.h>
+#include <hashed_db.h>
#include <tic.h>
-#include <term_entry.h>
-
-MODULE_ID("$Id: read_entry.c,v 1.81 2005/06/02 22:04:32 tom Exp $")
-#if !HAVE_TELL
-#define tell(fd) lseek(fd, 0, SEEK_CUR) /* lseek() is POSIX, but not tell() */
-#endif
+MODULE_ID("$Id: read_entry.c,v 1.130 2016/05/28 23:22:52 tom Exp $")
#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
-/*
- * int
- * _nc_read_file_entry(filename, ptr)
- *
- * Read the compiled terminfo entry in the given file into the
- * structure pointed to by ptr, allocating space for the string
- * table.
- */
-
-#undef BYTE
-#define BYTE(p,n) (unsigned char)((p)[n])
-
-#define IS_NEG1(p) ((BYTE(p,0) == 0377) && (BYTE(p,1) == 0377))
-#define IS_NEG2(p) ((BYTE(p,0) == 0376) && (BYTE(p,1) == 0377))
-#define LOW_MSB(p) (BYTE(p,0) + 256*BYTE(p,1))
-
-static bool have_tic_directory = FALSE;
-static bool keep_tic_directory = FALSE;
-
-/*
- * Record the "official" location of the terminfo directory, according to
- * the place where we're writing to, or the normal default, if not.
- */
-NCURSES_EXPORT(const char *)
-_nc_tic_dir(const char *path)
-{
- static const char *result = TERMINFO;
-
- if (!keep_tic_directory) {
- if (path != 0) {
- result = path;
- have_tic_directory = TRUE;
- } else if (!have_tic_directory && use_terminfo_vars()) {
- char *envp;
- if ((envp = getenv("TERMINFO")) != 0)
- return _nc_tic_dir(envp);
- }
- }
- return result;
-}
-
-/*
- * Special fix to prevent the terminfo directory from being moved after tic
- * has chdir'd to it. If we let it be changed, then if $TERMINFO has a
- * relative path, we'll lose track of the actual directory.
- */
-NCURSES_EXPORT(void)
-_nc_keep_tic_dir(const char *path)
-{
- _nc_tic_dir(path);
- keep_tic_directory = TRUE;
-}
+#define MyNumber(n) (short) LOW_MSB(n)
+#if NCURSES_USE_DATABASE
static void
convert_shorts(char *buf, short *Numbers, int count)
{
else if (IS_NEG2(buf + 2 * i))
Numbers[i] = CANCELLED_NUMERIC;
else
- Numbers[i] = LOW_MSB(buf + 2 * i);
+ Numbers[i] = MyNumber(buf + 2 * i);
TR(TRACE_DATABASE, ("get Numbers[%d]=%d", i, Numbers[i]));
}
}
Strings[i] = ABSENT_STRING;
} else if (IS_NEG2(buf + 2 * i)) {
Strings[i] = CANCELLED_STRING;
- } else if (LOW_MSB(buf + 2 * i) > size) {
+ } else if (MyNumber(buf + 2 * i) > size) {
Strings[i] = ABSENT_STRING;
} else {
- Strings[i] = (LOW_MSB(buf + 2 * i) + table);
+ Strings[i] = (MyNumber(buf + 2 * i) + table);
TR(TRACE_DATABASE, ("Strings[%d] = %s", i, _nc_visbuf(Strings[i])));
}
}
}
-#define read_shorts(fd, buf, count) \
- (read(fd, buf, (unsigned) (count)*2) == (int) (count)*2)
+static int
+fake_read(char *src, int *offset, int limit, char *dst, unsigned want)
+{
+ int have = (limit - *offset);
+
+ if (have > 0) {
+ if ((int) want > have)
+ want = (unsigned) have;
+ memcpy(dst, src + *offset, (size_t) want);
+ *offset += (int) want;
+ } else {
+ want = 0;
+ }
+ return (int) want;
+}
+
+#define Read(buf, count) fake_read(buffer, &offset, limit, (char *) buf, (unsigned) count)
+
+#define read_shorts(buf, count) \
+ (Read(buf, (count)*2) == (int) (count)*2)
#define even_boundary(value) \
- if ((value) % 2 != 0) read(fd, buf, 1)
+ if ((value) % 2 != 0) Read(buf, 1)
+#endif
-static int
-read_termtype(int fd, TERMTYPE *ptr)
-/* return 1 if read, 0 if not found or garbled */
+NCURSES_EXPORT(void)
+_nc_init_termtype(TERMTYPE *const tp)
+{
+ unsigned i;
+
+#if NCURSES_XNAMES
+ tp->num_Booleans = BOOLCOUNT;
+ tp->num_Numbers = NUMCOUNT;
+ tp->num_Strings = STRCOUNT;
+ tp->ext_Booleans = 0;
+ tp->ext_Numbers = 0;
+ tp->ext_Strings = 0;
+#endif
+ if (tp->Booleans == 0)
+ TYPE_MALLOC(NCURSES_SBOOL, BOOLCOUNT, tp->Booleans);
+ if (tp->Numbers == 0)
+ TYPE_MALLOC(short, NUMCOUNT, tp->Numbers);
+ if (tp->Strings == 0)
+ TYPE_MALLOC(char *, STRCOUNT, tp->Strings);
+
+ for_each_boolean(i, tp)
+ tp->Booleans[i] = FALSE;
+
+ for_each_number(i, tp)
+ tp->Numbers[i] = ABSENT_NUMERIC;
+
+ for_each_string(i, tp)
+ tp->Strings[i] = ABSENT_STRING;
+}
+
+#if NCURSES_USE_DATABASE
+#if NCURSES_XNAMES
+static bool
+valid_shorts(char *buffer, int limit)
{
+ bool result = FALSE;
+ int n;
+ for (n = 0; n < limit; ++n) {
+ if (MyNumber(buffer + (n * 2)) > 0) {
+ result = TRUE;
+ break;
+ }
+ }
+ return result;
+}
+#endif
+
+/*
+ * Return TGETENT_YES if read, TGETENT_NO if not found or garbled.
+ */
+NCURSES_EXPORT(int)
+_nc_read_termtype(TERMTYPE *ptr, char *buffer, int limit)
+{
+ int offset = 0;
int name_size, bool_count, num_count, str_count, str_size;
int i;
- char buf[MAX_ENTRY_SIZE + 1];
+ char buf[MAX_ENTRY_SIZE + 2];
+ char *string_table;
unsigned want, have;
- TR(TRACE_DATABASE, ("READ termtype header @%ld", (long) tell(fd)));
+ TR(TRACE_DATABASE, ("READ termtype header @%d", offset));
memset(ptr, 0, sizeof(*ptr));
/* grab the header */
- if (!read_shorts(fd, buf, 6)
- || LOW_MSB(buf) != MAGIC) {
- return (0);
+ if (!read_shorts(buf, 6)
+ || !IS_TIC_MAGIC(buf)) {
+ return (TGETENT_NO);
}
- name_size = LOW_MSB(buf + 2);
- bool_count = LOW_MSB(buf + 4);
- num_count = LOW_MSB(buf + 6);
- str_count = LOW_MSB(buf + 8);
- str_size = LOW_MSB(buf + 10);
+ name_size = MyNumber(buf + 2);
+ bool_count = MyNumber(buf + 4);
+ num_count = MyNumber(buf + 6);
+ str_count = MyNumber(buf + 8);
+ str_size = MyNumber(buf + 10);
TR(TRACE_DATABASE,
("TERMTYPE name_size=%d, bool=%d/%d, num=%d/%d str=%d/%d(%d)",
|| num_count < 0
|| str_count < 0
|| str_size < 0) {
- return (0);
+ return (TGETENT_NO);
}
+ want = (unsigned) (str_size + name_size + 1);
if (str_size) {
/* try to allocate space for the string table */
- if (str_count * 2 >= (int) sizeof(buf)
- || (ptr->str_table = typeMalloc(char, (unsigned) str_size)) == 0) {
- return (0);
+ if (str_count * 2 >= MAX_ENTRY_SIZE
+ || (string_table = typeMalloc(char, want)) == 0) {
+ return (TGETENT_NO);
}
} else {
str_count = 0;
+ if ((string_table = typeMalloc(char, want)) == 0) {
+ return (TGETENT_NO);
+ }
}
/* grab the name (a null-terminated string) */
want = min(MAX_NAME_SIZE, (unsigned) name_size);
- if ((have = read(fd, buf, want)) != want) {
- memset(buf + have, 0, want - have);
+ ptr->str_table = string_table;
+ ptr->term_names = string_table;
+ if ((have = (unsigned) Read(ptr->term_names, want)) != want) {
+ memset(ptr->term_names + have, 0, (size_t) (want - have));
}
- buf[want] = '\0';
- ptr->term_names = TYPE_CALLOC(char, strlen(buf) + 1);
- if (ptr->term_names == NULL) {
- return (0);
- }
- (void) strcpy(ptr->term_names, buf);
+ ptr->term_names[want] = '\0';
+ string_table += (want + 1);
+
if (have > MAX_NAME_SIZE)
- lseek(fd, (off_t) (have - MAX_NAME_SIZE), 1);
+ offset = (int) (have - MAX_NAME_SIZE);
/* grab the booleans */
- if ((ptr->Booleans = TYPE_CALLOC(char, max(BOOLCOUNT, bool_count))) == 0
- || read(fd, ptr->Booleans, (unsigned) bool_count) < bool_count) {
- return (0);
+ if ((ptr->Booleans = TYPE_CALLOC(NCURSES_SBOOL,
+ max(BOOLCOUNT, bool_count))) == 0
+ || Read(ptr->Booleans, (unsigned) bool_count) < bool_count) {
+ return (TGETENT_NO);
}
/*
/* grab the numbers */
if ((ptr->Numbers = TYPE_CALLOC(short, max(NUMCOUNT, num_count))) == 0
- || !read_shorts(fd, buf, num_count)) {
- return (0);
+ || !read_shorts(buf, num_count)) {
+ return (TGETENT_NO);
}
convert_shorts(buf, ptr->Numbers, num_count);
- if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0)
- return (0);
+ if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0) {
+ return (TGETENT_NO);
+ }
if (str_count) {
/* grab the string offsets */
- if (!read_shorts(fd, buf, str_count)) {
- return (0);
+ if (!read_shorts(buf, str_count)) {
+ return (TGETENT_NO);
}
/* finally, grab the string table itself */
- if (read(fd, ptr->str_table, (unsigned) str_size) != str_size)
- return (0);
- convert_strings(buf, ptr->Strings, str_count, str_size, ptr->str_table);
+ if (Read(string_table, (unsigned) str_size) != str_size) {
+ return (TGETENT_NO);
+ }
+ convert_strings(buf, ptr->Strings, str_count, str_size, string_table);
}
#if NCURSES_XNAMES
* Read extended entries, if any, after the normal end of terminfo data.
*/
even_boundary(str_size);
- TR(TRACE_DATABASE, ("READ extended_header @%ld", (long) tell(fd)));
- if (_nc_user_definable && read_shorts(fd, buf, 5)) {
- int ext_bool_count = LOW_MSB(buf + 0);
- int ext_num_count = LOW_MSB(buf + 2);
- int ext_str_count = LOW_MSB(buf + 4);
- int ext_str_size = LOW_MSB(buf + 6);
- int ext_str_limit = LOW_MSB(buf + 8);
- unsigned need = (ext_bool_count + ext_num_count + ext_str_count);
+ TR(TRACE_DATABASE, ("READ extended_header @%d", offset));
+ if (_nc_user_definable && read_shorts(buf, 5) && valid_shorts(buf, 5)) {
+ int ext_bool_count = MyNumber(buf + 0);
+ int ext_num_count = MyNumber(buf + 2);
+ int ext_str_count = MyNumber(buf + 4);
+ int ext_str_size = MyNumber(buf + 6);
+ int ext_str_limit = MyNumber(buf + 8);
+ unsigned need = (unsigned) (ext_bool_count + ext_num_count + ext_str_count);
int base = 0;
- if (need >= sizeof(buf)
- || ext_str_size >= (int) sizeof(buf)
- || ext_str_limit >= (int) sizeof(buf)
+ if (need >= (MAX_ENTRY_SIZE / 2)
+ || ext_str_size >= MAX_ENTRY_SIZE
+ || ext_str_limit >= MAX_ENTRY_SIZE
|| ext_bool_count < 0
|| ext_num_count < 0
|| ext_str_count < 0
|| ext_str_size < 0
- || ext_str_limit < 0)
- return (0);
+ || ext_str_limit < 0) {
+ return (TGETENT_NO);
+ }
- ptr->num_Booleans = BOOLCOUNT + ext_bool_count;
- ptr->num_Numbers = NUMCOUNT + ext_num_count;
- ptr->num_Strings = STRCOUNT + ext_str_count;
+ ptr->num_Booleans = UShort(BOOLCOUNT + ext_bool_count);
+ ptr->num_Numbers = UShort(NUMCOUNT + ext_num_count);
+ ptr->num_Strings = UShort(STRCOUNT + ext_str_count);
- ptr->Booleans = typeRealloc(char, ptr->num_Booleans, ptr->Booleans);
- ptr->Numbers = typeRealloc(short, ptr->num_Numbers, ptr->Numbers);
- ptr->Strings = typeRealloc(char *, ptr->num_Strings, ptr->Strings);
+ TYPE_REALLOC(NCURSES_SBOOL, ptr->num_Booleans, ptr->Booleans);
+ TYPE_REALLOC(short, ptr->num_Numbers, ptr->Numbers);
+ TYPE_REALLOC(char *, ptr->num_Strings, ptr->Strings);
TR(TRACE_DATABASE, ("extended header is %d/%d/%d(%d:%d)",
ext_bool_count, ext_num_count, ext_str_count,
ext_str_size, ext_str_limit));
- TR(TRACE_DATABASE, ("READ %d extended-booleans @%ld",
- ext_bool_count, (long) tell(fd)));
- if ((ptr->ext_Booleans = ext_bool_count) != 0) {
- if (read(fd, ptr->Booleans + BOOLCOUNT, (unsigned)
- ext_bool_count) != ext_bool_count)
- return (0);
+ TR(TRACE_DATABASE, ("READ %d extended-booleans @%d",
+ ext_bool_count, offset));
+ if ((ptr->ext_Booleans = UShort(ext_bool_count)) != 0) {
+ if (Read(ptr->Booleans + BOOLCOUNT, (unsigned)
+ ext_bool_count) != ext_bool_count) {
+ return (TGETENT_NO);
+ }
}
even_boundary(ext_bool_count);
- TR(TRACE_DATABASE, ("READ %d extended-numbers @%ld",
- ext_num_count, (long) tell(fd)));
- if ((ptr->ext_Numbers = ext_num_count) != 0) {
- if (!read_shorts(fd, buf, ext_num_count))
- return (0);
+ TR(TRACE_DATABASE, ("READ %d extended-numbers @%d",
+ ext_num_count, offset));
+ if ((ptr->ext_Numbers = UShort(ext_num_count)) != 0) {
+ if (!read_shorts(buf, ext_num_count)) {
+ return (TGETENT_NO);
+ }
TR(TRACE_DATABASE, ("Before converting extended-numbers"));
convert_shorts(buf, ptr->Numbers + NUMCOUNT, ext_num_count);
}
- TR(TRACE_DATABASE, ("READ extended-offsets @%ld", (long) tell(fd)));
+ TR(TRACE_DATABASE, ("READ extended-offsets @%d", offset));
+ if ((unsigned) (ext_str_count + (int) need) >= (MAX_ENTRY_SIZE / 2)) {
+ return (TGETENT_NO);
+ }
if ((ext_str_count || need)
- && !read_shorts(fd, buf, ext_str_count + need))
- return (0);
+ && !read_shorts(buf, ext_str_count + (int) need)) {
+ return (TGETENT_NO);
+ }
- TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%ld",
- ext_str_limit, (long) tell(fd)));
+ TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%d",
+ ext_str_limit, offset));
if (ext_str_limit) {
- if ((ptr->ext_str_table = typeMalloc(char, ext_str_limit)) == 0)
- return (0);
- if (read(fd, ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit)
- return (0);
+ ptr->ext_str_table = typeMalloc(char, (size_t) ext_str_limit);
+ if (ptr->ext_str_table == 0) {
+ return (TGETENT_NO);
+ }
+ if (Read(ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit) {
+ return (TGETENT_NO);
+ }
TR(TRACE_DATABASE, ("first extended-string is %s", _nc_visbuf(ptr->ext_str_table)));
}
- if ((ptr->ext_Strings = ext_str_count) != 0) {
+ if ((ptr->ext_Strings = UShort(ext_str_count)) != 0) {
TR(TRACE_DATABASE,
("Before computing extended-string capabilities str_count=%d, ext_str_count=%d",
str_count, ext_str_count));
_nc_visbuf(ptr->Strings[i + str_count])));
ptr->Strings[i + STRCOUNT] = ptr->Strings[i + str_count];
if (VALID_STRING(ptr->Strings[i + STRCOUNT]))
- base += (strlen(ptr->Strings[i + STRCOUNT]) + 1);
+ base += (int) (strlen(ptr->Strings[i + STRCOUNT]) + 1);
TR(TRACE_DATABASE, ("... to [%d] %s",
i + STRCOUNT,
_nc_visbuf(ptr->Strings[i + STRCOUNT])));
}
if (need) {
- if ((ptr->ext_Names = TYPE_CALLOC(char *, need)) == 0)
- return (0);
+ if (ext_str_count >= (MAX_ENTRY_SIZE / 2)) {
+ return (TGETENT_NO);
+ }
+ if ((ptr->ext_Names = TYPE_CALLOC(char *, need)) == 0) {
+ return (TGETENT_NO);
+ }
TR(TRACE_DATABASE,
("ext_NAMES starting @%d in extended_strings, first = %s",
base, _nc_visbuf(ptr->ext_str_table + base)));
ext_str_limit, ptr->ext_str_table + base);
}
- T(("...done reading terminfo bool %d(%d) num %d(%d) str %d(%d)",
- ptr->num_Booleans, ptr->ext_Booleans,
- ptr->num_Numbers, ptr->ext_Numbers,
- ptr->num_Strings, ptr->ext_Strings));
+ TR(TRACE_DATABASE,
+ ("...done reading terminfo bool %d(%d) num %d(%d) str %d(%d)",
+ ptr->num_Booleans, ptr->ext_Booleans,
+ ptr->num_Numbers, ptr->ext_Numbers,
+ ptr->num_Strings, ptr->ext_Strings));
TR(TRACE_DATABASE, ("extend: num_Booleans:%d", ptr->num_Booleans));
} else
#endif /* NCURSES_XNAMES */
{
- T(("...done reading terminfo bool %d num %d str %d",
- bool_count, num_count, str_count));
+ TR(TRACE_DATABASE, ("...done reading terminfo bool %d num %d str %d",
+ bool_count, num_count, str_count));
#if NCURSES_XNAMES
TR(TRACE_DATABASE, ("normal: num_Booleans:%d", ptr->num_Booleans));
#endif
for (i = str_count; i < STRCOUNT; i++)
ptr->Strings[i] = ABSENT_STRING;
- return (1);
+ return (TGETENT_YES);
}
+/*
+ * int
+ * _nc_read_file_entry(filename, ptr)
+ *
+ * Read the compiled terminfo entry in the given file into the
+ * structure pointed to by ptr, allocating space for the string
+ * table.
+ */
NCURSES_EXPORT(int)
_nc_read_file_entry(const char *const filename, TERMTYPE *ptr)
/* return 1 if read, 0 if not found or garbled */
{
- int code, fd = -1;
+ FILE *fp = 0;
+ int code;
if (_nc_access(filename, R_OK) < 0
- || (fd = open(filename, O_RDONLY | O_BINARY)) < 0) {
- T(("cannot open terminfo %s (errno=%d)", filename, errno));
- code = 0;
+ || (fp = fopen(filename, "rb")) == 0) {
+ TR(TRACE_DATABASE, ("cannot open terminfo %s (errno=%d)", filename, errno));
+ code = TGETENT_NO;
} else {
- T(("read terminfo %s", filename));
- if ((code = read_termtype(fd, ptr)) == 0) {
- _nc_free_termtype(ptr);
+ int limit;
+ char buffer[MAX_ENTRY_SIZE + 1];
+
+ if ((limit = (int) fread(buffer, sizeof(char), sizeof(buffer), fp))
+ > 0) {
+
+ TR(TRACE_DATABASE, ("read terminfo %s", filename));
+ if ((code = _nc_read_termtype(ptr, buffer, limit)) == TGETENT_NO) {
+ _nc_free_termtype(ptr);
+ }
+ } else {
+ code = TGETENT_NO;
}
- close(fd);
+ fclose(fp);
}
return (code);
}
+#if USE_HASHED_DB
/*
- * Build a terminfo pathname and try to read the data. Returns 1 on success,
- * 0 on failure.
+ * Return if if we can build the filename of a ".db" file.
*/
-static int
-_nc_read_tic_entry(char *const filename,
- const char *const dir, const char *ttn, TERMTYPE *const tp)
+static bool
+make_db_filename(char *filename, unsigned limit, const char *const path)
{
- int need = 2 + strlen(dir) + strlen(ttn);
+ static const char suffix[] = DBM_SUFFIX;
- if (need > PATH_MAX)
- return 0;
- (void) sprintf(filename, "%s/%s", dir, ttn);
- return _nc_read_file_entry(filename, tp);
+ size_t lens = sizeof(suffix) - 1;
+ size_t size = strlen(path);
+ size_t test = lens + size;
+ bool result = FALSE;
+
+ if (test < limit) {
+ if (size >= lens
+ && !strcmp(path + size - lens, suffix))
+ _nc_STRCPY(filename, path, limit);
+ else
+ _nc_SPRINTF(filename, _nc_SLIMIT(limit) "%s%s", path, suffix);
+ result = TRUE;
+ }
+ return result;
}
+#endif
/*
- * Process the list of :-separated directories, looking for the terminal type.
- * We don't use strtok because it does not show us empty tokens.
+ * Return true if we can build the name of a filesystem entry.
+ */
+static bool
+make_dir_filename(char *filename,
+ unsigned limit,
+ const char *const path,
+ const char *name)
+{
+ bool result = FALSE;
+
+#if NCURSES_USE_TERMCAP
+ if (_nc_is_dir_path(path))
+#endif
+ {
+ unsigned need = (unsigned) (LEAF_LEN + 3 + strlen(path) + strlen(name));
+
+ if (need <= limit) {
+ _nc_SPRINTF(filename, _nc_SLIMIT(limit)
+ "%s/" LEAF_FMT "/%s", path, *name, name);
+ result = TRUE;
+ }
+ }
+ return result;
+}
+
+/*
+ * Build a terminfo pathname and try to read the data. Returns TGETENT_YES on
+ * success, TGETENT_NO on failure.
*/
static int
-_nc_read_terminfo_dirs(const char *dirs, char *const filename, const char *const
- ttn, TERMTYPE *const tp)
+_nc_read_tic_entry(char *filename,
+ unsigned limit,
+ const char *const path,
+ const char *name,
+ TERMTYPE *const tp)
{
- char *list, *a;
- const char *b;
- int code = 0;
-
- /* we'll modify the argument, so we must copy */
- if ((b = a = list = strdup(dirs)) == NULL)
- return (0);
-
- for (;;) {
- int c = *a;
- if (c == 0 || c == NCURSES_PATHSEP) {
- *a = 0;
- if ((b + 1) >= a)
- b = TERMINFO;
- if (_nc_read_tic_entry(filename, b, ttn, tp) == 1) {
- code = 1;
+ int code = TGETENT_NO;
+
+#if USE_HASHED_DB
+ DB *capdbp;
+
+ if (make_db_filename(filename, limit, path)
+ && (capdbp = _nc_db_open(filename, FALSE)) != 0) {
+
+ DBT key, data;
+ int reccnt = 0;
+ char *save = strdup(name);
+
+ memset(&key, 0, sizeof(key));
+ key.data = save;
+ key.size = strlen(save);
+
+ /*
+ * This lookup could return termcap data, which we do not want. We are
+ * looking for compiled (binary) terminfo data.
+ *
+ * cgetent uses a two-level lookup. On the first it uses the given
+ * name to return a record containing only the aliases for an entry.
+ * On the second (using that list of aliases as a key), it returns the
+ * content of the terminal description. We expect second lookup to
+ * return data beginning with the same set of aliases.
+ *
+ * For compiled terminfo, the list of aliases in the second case will
+ * be null-terminated. A termcap entry will not be, and will run on
+ * into the description. So we can easily distinguish between the two
+ * (source/binary) by checking the lengths.
+ */
+ while (_nc_db_get(capdbp, &key, &data) == 0) {
+ int used = (int) data.size - 1;
+ char *have = (char *) data.data;
+
+ if (*have++ == 0) {
+ if (data.size > key.size
+ && IS_TIC_MAGIC(have)) {
+ code = _nc_read_termtype(tp, have, used);
+ if (code == TGETENT_NO) {
+ _nc_free_termtype(tp);
+ }
+ }
break;
}
- b = a + 1;
- if (c == 0)
+
+ /*
+ * Just in case we have a corrupt database, do not waste time with
+ * it.
+ */
+ if (++reccnt >= 3)
break;
+
+ /*
+ * Prepare for the second level.
+ */
+ key.data = have;
+ key.size = used;
}
- a++;
- }
- free(list);
- return (code);
+ free(save);
+ } else /* may be either filesystem or flat file */
+#endif
+ if (make_dir_filename(filename, limit, path, name)) {
+ code = _nc_read_file_entry(filename, tp);
+ }
+#if NCURSES_USE_TERMCAP
+ else if (code != TGETENT_YES) {
+ code = _nc_read_termcap_entry(name, tp);
+ _nc_SPRINTF(filename, _nc_SLIMIT(PATH_MAX)
+ "%.*s", PATH_MAX - 1, _nc_get_source());
+ }
+#endif
+ return code;
}
+#endif /* NCURSES_USE_DATABASE */
/*
- * _nc_read_entry(char *tn, char *filename, TERMTYPE *tp)
+ * _nc_read_entry(char *name, char *filename, TERMTYPE *tp)
*
* Find and read the compiled entry for a given terminal type,
* if it exists. We take pains here to make sure no combination
*/
NCURSES_EXPORT(int)
-_nc_read_entry(const char *const tn, char *const filename, TERMTYPE *const tp)
+_nc_read_entry(const char *const name, char *const filename, TERMTYPE *const tp)
{
- char *envp;
- char ttn[PATH_MAX];
-
- if (strlen(tn) == 0
- || strcmp(tn, ".") == 0
- || strcmp(tn, "..") == 0
- || _nc_pathlast(tn) != 0) {
- T(("illegal or missing entry name '%s'", tn));
- return 0;
- }
+ int code = TGETENT_NO;
- /* truncate the terminal name to prevent buffer overflow */
- (void) sprintf(ttn, "%c/%.*s", *tn, (int) sizeof(ttn) - 3, tn);
+ _nc_SPRINTF(filename, _nc_SLIMIT(PATH_MAX)
+ "%.*s", PATH_MAX - 1, name);
- /* This is System V behavior, in conjunction with our requirements for
- * writing terminfo entries.
- */
- if (have_tic_directory
- && _nc_read_tic_entry(filename, _nc_tic_dir(0), ttn, tp) == 1)
- return 1;
-
- if (use_terminfo_vars()) {
- if ((envp = getenv("TERMINFO")) != 0
- && _nc_read_tic_entry(filename, _nc_tic_dir(envp), ttn, tp) == 1)
- return 1;
-
- /* this is an ncurses extension */
- if ((envp = _nc_home_terminfo()) != 0) {
- if (_nc_read_tic_entry(filename, envp, ttn, tp) == 1) {
- return 1;
+ if (strlen(name) == 0
+ || strcmp(name, ".") == 0
+ || strcmp(name, "..") == 0
+ || _nc_pathlast(name) != 0
+ || strchr(name, NCURSES_PATHSEP) != 0) {
+ TR(TRACE_DATABASE, ("illegal or missing entry name '%s'", name));
+ } else {
+#if NCURSES_USE_DATABASE
+ DBDIRS state;
+ int offset;
+ const char *path;
+
+ _nc_first_db(&state, &offset);
+ code = TGETENT_ERR;
+ while ((path = _nc_next_db(&state, &offset)) != 0) {
+ TR(TRACE_DATABASE, ("_nc_read_tic_entry path=%s, name=%s", path, name));
+ code = _nc_read_tic_entry(filename, PATH_MAX, path, name, tp);
+ if (code == TGETENT_YES) {
+ _nc_last_db();
+ break;
}
}
-
- /* this is an ncurses extension */
- if ((envp = getenv("TERMINFO_DIRS")) != 0)
- return _nc_read_terminfo_dirs(envp, filename, ttn, tp);
- }
-
- /* Try the system directory. Note that the TERMINFO_DIRS value, if
- * defined by the configure script, begins with a ":", which will be
- * interpreted as TERMINFO.
- */
-#ifdef TERMINFO_DIRS
- return _nc_read_terminfo_dirs(TERMINFO_DIRS, filename, ttn, tp);
-#else
- return _nc_read_tic_entry(filename, TERMINFO, ttn, tp);
+#elif NCURSES_USE_TERMCAP
+ if (code != TGETENT_YES) {
+ code = _nc_read_termcap_entry(name, tp);
+ _nc_SPRINTF(filename, _nc_SLIMIT(PATH_MAX)
+ "%.*s", PATH_MAX - 1, _nc_get_source());
+ }
#endif
+ }
+ return code;
}
projects / ncurses.git / blobdiff