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* read_entry.c -- Routine for reading in a compiled terminfo file
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#include <curses.priv.h>
40
#include <hashed_db.h>
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43
#include <term_entry.h>
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MODULE_ID("$Id: read_entry.c,v 1.81 2005/06/02 22:04:32 tom Exp $")
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#define tell(fd) lseek(fd, 0, SEEK_CUR) /* lseek() is POSIX, but not tell() */
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MODULE_ID("$Id: read_entry.c,v 1.99 2006/08/19 15:58:50 tom Exp $")
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#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
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* _nc_read_file_entry(filename, ptr)
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* Read the compiled terminfo entry in the given file into the
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* structure pointed to by ptr, allocating space for the string
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#define BYTE(p,n) (unsigned char)((p)[n])
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#define IS_NEG1(p) ((BYTE(p,0) == 0377) && (BYTE(p,1) == 0377))
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#define IS_NEG2(p) ((BYTE(p,0) == 0376) && (BYTE(p,1) == 0377))
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#define LOW_MSB(p) (BYTE(p,0) + 256*BYTE(p,1))
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static bool have_tic_directory = FALSE;
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static bool keep_tic_directory = FALSE;
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* Record the "official" location of the terminfo directory, according to
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* the place where we're writing to, or the normal default, if not.
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NCURSES_EXPORT(const char *)
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_nc_tic_dir(const char *path)
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static const char *result = TERMINFO;
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if (!keep_tic_directory) {
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have_tic_directory = TRUE;
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} else if (!have_tic_directory && use_terminfo_vars()) {
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if ((envp = getenv("TERMINFO")) != 0)
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return _nc_tic_dir(envp);
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* Special fix to prevent the terminfo directory from being moved after tic
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* has chdir'd to it. If we let it be changed, then if $TERMINFO has a
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* relative path, we'll lose track of the actual directory.
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_nc_keep_tic_dir(const char *path)
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keep_tic_directory = TRUE;
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convert_shorts(char *buf, short *Numbers, int count)
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#define read_shorts(fd, buf, count) \
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(read(fd, buf, (unsigned) (count)*2) == (int) (count)*2)
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fake_read(char *src, int *offset, int limit, char *dst, unsigned want)
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int have = (limit - *offset);
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if ((int) want > have)
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memcpy(dst, src + *offset, want);
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#define Read(buf, count) fake_read(buffer, &offset, limit, buf, count)
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#define read_shorts(buf, count) \
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(Read(buf, (unsigned) (count)*2) == (int) (count)*2)
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#define even_boundary(value) \
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if ((value) % 2 != 0) read(fd, buf, 1)
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if ((value) % 2 != 0) Read(buf, 1)
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read_termtype(int fd, TERMTYPE *ptr)
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_nc_read_termtype(TERMTYPE *ptr, char *buffer, int limit)
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/* return 1 if read, 0 if not found or garbled */
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int name_size, bool_count, num_count, str_count, str_size;
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char buf[MAX_ENTRY_SIZE + 1];
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unsigned want, have;
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TR(TRACE_DATABASE, ("READ termtype header @%ld", (long) tell(fd)));
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TR(TRACE_DATABASE, ("READ termtype header @%d", offset));
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memset(ptr, 0, sizeof(*ptr));
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/* grab the header */
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if (!read_shorts(fd, buf, 6)
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|| LOW_MSB(buf) != MAGIC) {
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if (!read_shorts(buf, 6)
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|| !IS_TIC_MAGIC(buf)) {
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name_size = LOW_MSB(buf + 2);
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|| str_size < 0) {
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want = str_size + name_size + 1;
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/* try to allocate space for the string table */
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if (str_count * 2 >= (int) sizeof(buf)
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|| (ptr->str_table = typeMalloc(char, (unsigned) str_size)) == 0) {
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|| (string_table = typeMalloc(char, want)) == 0) {
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if ((string_table = typeMalloc(char, want)) == 0) {
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/* grab the name (a null-terminated string) */
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want = min(MAX_NAME_SIZE, (unsigned) name_size);
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if ((have = read(fd, buf, want)) != want) {
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memset(buf + have, 0, want - have);
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ptr->term_names = TYPE_CALLOC(char, strlen(buf) + 1);
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if (ptr->term_names == NULL) {
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(void) strcpy(ptr->term_names, buf);
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ptr->str_table = string_table;
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ptr->term_names = string_table;
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if ((have = Read(ptr->term_names, want)) != want) {
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memset(ptr->term_names + have, 0, want - have);
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ptr->term_names[want] = '\0';
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string_table += (want + 1);
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if (have > MAX_NAME_SIZE)
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lseek(fd, (off_t) (have - MAX_NAME_SIZE), 1);
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offset = (have - MAX_NAME_SIZE);
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/* grab the booleans */
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if ((ptr->Booleans = TYPE_CALLOC(char, max(BOOLCOUNT, bool_count))) == 0
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|| read(fd, ptr->Booleans, (unsigned) bool_count) < bool_count) {
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if ((ptr->Booleans = TYPE_CALLOC(NCURSES_SBOOL,
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max(BOOLCOUNT, bool_count))) == 0
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|| Read(ptr->Booleans, (unsigned) bool_count) < bool_count) {
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/* grab the numbers */
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if ((ptr->Numbers = TYPE_CALLOC(short, max(NUMCOUNT, num_count))) == 0
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|| !read_shorts(fd, buf, num_count)) {
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|| !read_shorts(buf, num_count)) {
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convert_shorts(buf, ptr->Numbers, num_count);
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if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0)
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/* grab the string offsets */
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if (!read_shorts(fd, buf, str_count)) {
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if (!read_shorts(buf, str_count)) {
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/* finally, grab the string table itself */
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if (read(fd, ptr->str_table, (unsigned) str_size) != str_size)
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convert_strings(buf, ptr->Strings, str_count, str_size, ptr->str_table);
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if (Read(string_table, (unsigned) str_size) != str_size)
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convert_strings(buf, ptr->Strings, str_count, str_size, string_table);
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#if NCURSES_XNAMES
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ext_bool_count, ext_num_count, ext_str_count,
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ext_str_size, ext_str_limit));
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TR(TRACE_DATABASE, ("READ %d extended-booleans @%ld",
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ext_bool_count, (long) tell(fd)));
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TR(TRACE_DATABASE, ("READ %d extended-booleans @%d",
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ext_bool_count, offset));
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if ((ptr->ext_Booleans = ext_bool_count) != 0) {
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if (read(fd, ptr->Booleans + BOOLCOUNT, (unsigned)
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if (Read(ptr->Booleans + BOOLCOUNT, (unsigned)
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ext_bool_count) != ext_bool_count)
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even_boundary(ext_bool_count);
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TR(TRACE_DATABASE, ("READ %d extended-numbers @%ld",
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ext_num_count, (long) tell(fd)));
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TR(TRACE_DATABASE, ("READ %d extended-numbers @%d",
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ext_num_count, offset));
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if ((ptr->ext_Numbers = ext_num_count) != 0) {
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if (!read_shorts(fd, buf, ext_num_count))
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if (!read_shorts(buf, ext_num_count))
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TR(TRACE_DATABASE, ("Before converting extended-numbers"));
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convert_shorts(buf, ptr->Numbers + NUMCOUNT, ext_num_count);
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TR(TRACE_DATABASE, ("READ extended-offsets @%ld", (long) tell(fd)));
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TR(TRACE_DATABASE, ("READ extended-offsets @%d", offset));
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if ((ext_str_count || need)
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&& !read_shorts(fd, buf, ext_str_count + need))
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&& !read_shorts(buf, ext_str_count + need))
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TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%ld",
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ext_str_limit, (long) tell(fd)));
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TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%d",
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ext_str_limit, offset));
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if (ext_str_limit) {
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if ((ptr->ext_str_table = typeMalloc(char, ext_str_limit)) == 0)
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if (read(fd, ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit)
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if (Read(ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit)
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TR(TRACE_DATABASE, ("first extended-string is %s", _nc_visbuf(ptr->ext_str_table)));
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for (i = str_count; i < STRCOUNT; i++)
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ptr->Strings[i] = ABSENT_STRING;
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return (TGETENT_YES);
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* _nc_read_file_entry(filename, ptr)
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* Read the compiled terminfo entry in the given file into the
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* structure pointed to by ptr, allocating space for the string
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NCURSES_EXPORT(int)
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_nc_read_file_entry(const char *const filename, TERMTYPE *ptr)
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/* return 1 if read, 0 if not found or garbled */
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int code, fd = -1;
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char buffer[MAX_ENTRY_SIZE + 1];
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if (_nc_access(filename, R_OK) < 0
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|| (fd = open(filename, O_RDONLY | O_BINARY)) < 0) {
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T(("cannot open terminfo %s (errno=%d)", filename, errno));
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T(("read terminfo %s", filename));
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if ((code = read_termtype(fd, ptr)) == 0) {
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_nc_free_termtype(ptr);
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if ((limit = read(fd, buffer, sizeof(buffer))) > 0) {
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T(("read terminfo %s", filename));
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if ((code = _nc_read_termtype(ptr, buffer, limit)) == TGETENT_NO) {
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_nc_free_termtype(ptr);
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* Build a terminfo pathname and try to read the data. Returns 1 on success,
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_nc_read_tic_entry(char *const filename,
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const char *const dir, const char *ttn, TERMTYPE *const tp)
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int need = 2 + strlen(dir) + strlen(ttn);
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(void) sprintf(filename, "%s/%s", dir, ttn);
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return _nc_read_file_entry(filename, tp);
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* Process the list of :-separated directories, looking for the terminal type.
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* We don't use strtok because it does not show us empty tokens.
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_nc_read_terminfo_dirs(const char *dirs, char *const filename, const char *const
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ttn, TERMTYPE *const tp)
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/* we'll modify the argument, so we must copy */
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if ((b = a = list = strdup(dirs)) == NULL)
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if (c == 0 || c == NCURSES_PATHSEP) {
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if (_nc_read_tic_entry(filename, b, ttn, tp) == 1) {
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* Build a terminfo pathname and try to read the data. Returns TGETENT_YES on
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* success, TGETENT_NO on failure.
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_nc_read_tic_entry(char *filename,
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const char *const path,
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int result = TGETENT_NO;
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* If we are looking in a directory, assume the entry is a file under that,
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* according to the normal rules.
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* FIXME - add caseless-filename fixup.
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if (_nc_is_dir_path(path)) {
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unsigned need = 4 + strlen(path) + strlen(name);
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(void) sprintf(filename, "%s/%c/%s", path, *name, name);
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result = _nc_read_file_entry(filename, tp);
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static const char suffix[] = DBM_SUFFIX;
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unsigned lens = sizeof(suffix) - 1;
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unsigned size = strlen(path);
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unsigned need = lens + size;
426
&& !strcmp(path + size - lens, suffix))
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(void) strcpy(filename, path);
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(void) sprintf(filename, "%s%s", path, suffix);
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* It would be nice to optimize the dbopen/close activity, as
433
* done in the cgetent implementation for tc= clauses. However,
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* since we support multiple database locations, we cannot do
437
if ((capdbp = _nc_db_open(filename, FALSE)) != 0) {
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char *save = strdup(name);
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memset(&key, 0, sizeof(key));
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key.size = strlen(save);
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* This lookup could return termcap data, which we do not want.
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* We are looking for compiled (binary) terminfo data.
450
* cgetent uses a two-level lookup. On the first it uses the
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* given name to return a record containing only the aliases
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* for an entry. On the second (using that list of aliases as
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* a key), it returns the content of the terminal description.
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* We expect second lookup to return data beginning with the
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* same set of aliases.
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* For compiled terminfo, the list of aliases in the second
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* case will be null-terminated. A termcap entry will not be,
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* and will run on into the description. So we can easily
460
* distinguish between the two (source/binary) by checking the
463
while (_nc_db_get(capdbp, &key, &data) == 0) {
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int used = data.size - 1;
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char *have = (char *) data.data;
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if (data.size > key.size
469
&& IS_TIC_MAGIC(have)) {
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result = _nc_read_termtype(tp, have, used);
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if (result == TGETENT_NO) {
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_nc_free_termtype(tp);
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* Just in case we have a corrupt database, do not waste
486
* Prepare for the second level.
492
_nc_db_close(capdbp);
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#endif /* USE_DATABASE */
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* _nc_read_entry(char *tn, char *filename, TERMTYPE *tp)
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* _nc_read_entry(char *name, char *filename, TERMTYPE *tp)
462
505
* Find and read the compiled entry for a given terminal type,
463
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* if it exists. We take pains here to make sure no combination
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511
NCURSES_EXPORT(int)
469
_nc_read_entry(const char *const tn, char *const filename, TERMTYPE *const tp)
512
_nc_read_entry(const char *const name, char *const filename, TERMTYPE *const tp)
475
|| strcmp(tn, ".") == 0
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|| strcmp(tn, "..") == 0
477
|| _nc_pathlast(tn) != 0) {
478
T(("illegal or missing entry name '%s'", tn));
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/* truncate the terminal name to prevent buffer overflow */
483
(void) sprintf(ttn, "%c/%.*s", *tn, (int) sizeof(ttn) - 3, tn);
485
/* This is System V behavior, in conjunction with our requirements for
486
* writing terminfo entries.
488
if (have_tic_directory
489
&& _nc_read_tic_entry(filename, _nc_tic_dir(0), ttn, tp) == 1)
492
if (use_terminfo_vars()) {
493
if ((envp = getenv("TERMINFO")) != 0
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&& _nc_read_tic_entry(filename, _nc_tic_dir(envp), ttn, tp) == 1)
497
/* this is an ncurses extension */
498
if ((envp = _nc_home_terminfo()) != 0) {
499
if (_nc_read_tic_entry(filename, envp, ttn, tp) == 1) {
514
int code = TGETENT_NO;
516
if (strlen(name) == 0
517
|| strcmp(name, ".") == 0
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|| strcmp(name, "..") == 0
519
|| _nc_pathlast(name) != 0
520
|| strchr(name, NCURSES_PATHSEP) != 0) {
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T(("illegal or missing entry name '%s'", name));
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DBDIRS state = dbdTIC;
528
while ((path = _nc_next_db(&state, &offset)) != 0) {
529
code = _nc_read_tic_entry(filename, PATH_MAX, path, name, tp);
530
if (code == TGETENT_YES) {
504
/* this is an ncurses extension */
505
if ((envp = getenv("TERMINFO_DIRS")) != 0)
506
return _nc_read_terminfo_dirs(envp, filename, ttn, tp);
537
if (code != TGETENT_YES) {
538
code = _nc_read_termcap_entry(name, tp);
539
sprintf(filename, "%.*s", PATH_MAX - 1, _nc_get_source());
509
/* Try the system directory. Note that the TERMINFO_DIRS value, if
510
* defined by the configure script, begins with a ":", which will be
511
* interpreted as TERMINFO.
514
return _nc_read_terminfo_dirs(TERMINFO_DIRS, filename, ttn, tp);
516
return _nc_read_tic_entry(filename, TERMINFO, ttn, tp);
added
removed
ncurses/tinfo/read_entry.c
