/****************************************************************************
- * Copyright (c) 1998-2010,2011 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2014,2015 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 *
#include <tic.h>
-MODULE_ID("$Id: read_entry.c,v 1.109 2011/07/25 22:21:34 tom Exp $")
+MODULE_ID("$Id: read_entry.c,v 1.129 2015/06/27 16:16:40 tom Exp $")
#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
-#if USE_DATABASE
+#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] = (short) 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 ((int) 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])));
}
if (have > 0) {
if ((int) want > have)
want = (unsigned) have;
- memcpy(dst, src + *offset, want);
+ 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, buf, count)
+#define Read(buf, count) fake_read(buffer, &offset, limit, (char *) buf, (unsigned) count)
#define read_shorts(buf, count) \
- (Read(buf, (unsigned) (count)*2) == (int) (count)*2)
+ (Read(buf, (count)*2) == (int) (count)*2)
#define even_boundary(value) \
if ((value) % 2 != 0) Read(buf, 1)
+#endif
+
+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)
-/* return 1 if read, 0 if not found or garbled */
{
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;
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)",
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)
+ if (str_count * 2 >= MAX_ENTRY_SIZE
|| (string_table = typeMalloc(char, want)) == 0) {
return (TGETENT_NO);
}
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, want - have);
+ memset(ptr->term_names + have, 0, (size_t) (want - have));
}
ptr->term_names[want] = '\0';
string_table += (want + 1);
}
convert_shorts(buf, ptr->Numbers, num_count);
- if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0)
- return (TGETENT_NO);
+ if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0) {
+ return (TGETENT_NO);
+ }
if (str_count) {
/* grab the string offsets */
return (TGETENT_NO);
}
/* finally, grab the string table itself */
- if (Read(string_table, (unsigned) str_size) != str_size)
+ 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
*/
even_boundary(str_size);
TR(TRACE_DATABASE, ("READ extended_header @%d", offset));
- if (_nc_user_definable && read_shorts(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);
+ 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)
+ || ext_str_limit < 0) {
return (TGETENT_NO);
+ }
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(NCURSES_SBOOL, 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_bool_count, offset));
if ((ptr->ext_Booleans = UShort(ext_bool_count)) != 0) {
if (Read(ptr->Booleans + BOOLCOUNT, (unsigned)
- ext_bool_count) != ext_bool_count)
+ ext_bool_count) != ext_bool_count) {
return (TGETENT_NO);
+ }
}
even_boundary(ext_bool_count);
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))
+ 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 @%d", offset));
+ if ((unsigned) (ext_str_count + (int) need) >= (MAX_ENTRY_SIZE / 2)) {
+ return (TGETENT_NO);
+ }
if ((ext_str_count || need)
- && !read_shorts(buf, ext_str_count + (int) need))
+ && !read_shorts(buf, ext_str_count + (int) need)) {
return (TGETENT_NO);
+ }
TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%d",
ext_str_limit, offset));
if (ext_str_limit) {
ptr->ext_str_table = typeMalloc(char, (size_t) ext_str_limit);
- if (ptr->ext_str_table == 0)
+ if (ptr->ext_str_table == 0) {
return (TGETENT_NO);
- if (Read(ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit)
+ }
+ 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 (need) {
- if (ext_str_count >= (MAX_ENTRY_SIZE * 2))
+ if (ext_str_count >= (MAX_ENTRY_SIZE / 2)) {
return (TGETENT_NO);
- if ((ptr->ext_Names = TYPE_CALLOC(char *, need)) == 0)
- 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
if (_nc_access(filename, R_OK) < 0
|| (fp = fopen(filename, "rb")) == 0) {
- T(("cannot open terminfo %s (errno=%d)", filename, errno));
+ TR(TRACE_DATABASE, ("cannot open terminfo %s (errno=%d)", filename, errno));
code = TGETENT_NO;
} else {
if ((limit = (int) fread(buffer, sizeof(char), sizeof(buffer), fp))
> 0) {
- T(("read terminfo %s", filename));
+ TR(TRACE_DATABASE, ("read terminfo %s", filename));
if ((code = _nc_read_termtype(ptr, buffer, limit)) == TGETENT_NO) {
_nc_free_termtype(ptr);
}
return (code);
}
+#if USE_HASHED_DB
+/*
+ * Return if if we can build the filename of a ".db" file.
+ */
+static bool
+make_db_filename(char *filename, unsigned limit, const char *const path)
+{
+ static const char suffix[] = DBM_SUFFIX;
+
+ 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
+
+/*
+ * 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.
{
int code = TGETENT_NO;
- /*
- * If we are looking in a directory, assume the entry is a file under that,
- * according to the normal rules.
- */
- unsigned need = (unsigned) (LEAF_LEN + 3 + strlen(path) + strlen(name));
- if (need <= limit)
- (void) sprintf(filename, "%s/" LEAF_FMT "/%s", path, *name, name);
-
- if (_nc_is_dir_path(path))
- code = _nc_read_file_entry(filename, tp);
- else {
#if USE_HASHED_DB
- static const char suffix[] = DBM_SUFFIX;
- DB *capdbp;
- unsigned lens = sizeof(suffix) - 1;
- unsigned size = strlen(path);
- unsigned test = lens + size;
-
- if (test < limit) {
- if (size >= lens
- && !strcmp(path + size - lens, suffix))
- (void) strcpy(filename, path);
- else
- (void) sprintf(filename, "%s%s", path, suffix);
+ 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;
+ }
/*
- * It would be nice to optimize the dbopen/close activity, as
- * done in the cgetent implementation for tc= clauses. However,
- * since we support multiple database locations, we cannot do
- * that.
+ * Just in case we have a corrupt database, do not waste time with
+ * it.
*/
- if ((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 = 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;
- }
-
- /*
- * 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;
- }
+ if (++reccnt >= 3)
+ break;
- _nc_db_close(capdbp);
- free(save);
- }
- }
-#endif
-#if USE_TERMCAP
- if (code != TGETENT_YES) {
- code = _nc_read_termcap_entry(name, tp);
- sprintf(filename, "%.*s", PATH_MAX - 1, _nc_get_source());
+ /*
+ * Prepare for the second level.
+ */
+ key.data = have;
+ key.size = used;
}
+
+ 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 /* USE_DATABASE */
+#endif /* NCURSES_USE_DATABASE */
/*
* _nc_read_entry(char *name, char *filename, TERMTYPE *tp)
{
int code = TGETENT_NO;
- sprintf(filename, "%.*s", PATH_MAX - 1, name);
+ _nc_SPRINTF(filename, _nc_SLIMIT(PATH_MAX)
+ "%.*s", PATH_MAX - 1, name);
+
if (strlen(name) == 0
|| strcmp(name, ".") == 0
|| strcmp(name, "..") == 0
|| _nc_pathlast(name) != 0
|| strchr(name, NCURSES_PATHSEP) != 0) {
- T(("illegal or missing entry name '%s'", name));
+ TR(TRACE_DATABASE, ("illegal or missing entry name '%s'", name));
} else {
-#if USE_DATABASE
- DBDIRS state = dbdTIC;
- int offset = 0;
+#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;
}
}
-#elif USE_TERMCAP
+#elif NCURSES_USE_TERMCAP
if (code != TGETENT_YES) {
code = _nc_read_termcap_entry(name, tp);
- sprintf(filename, "%.*s", PATH_MAX - 1, _nc_get_source());
+ _nc_SPRINTF(filename, _nc_SLIMIT(PATH_MAX)
+ "%.*s", PATH_MAX - 1, _nc_get_source());
}
#endif
}
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