/****************************************************************************
- * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2004,2005 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 *
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ * and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
#include <tic.h>
#include <term_entry.h>
-MODULE_ID("$Id: read_entry.c,v 1.69 2000/10/10 00:57:40 Todd.Miller Exp $")
+MODULE_ID("$Id: read_entry.c,v 1.81 2005/06/02 22:04:32 tom Exp $")
#if !HAVE_TELL
-#define tell(fd) 0 /* lseek() is POSIX, but not tell() - odd... */
+#define tell(fd) lseek(fd, 0, SEEK_CUR) /* lseek() is POSIX, but not tell() */
#endif
+#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
+
/*
* int
* _nc_read_file_entry(filename, ptr)
* Record the "official" location of the terminfo directory, according to
* the place where we're writing to, or the normal default, if not.
*/
-const char *
+NCURSES_EXPORT(const char *)
_nc_tic_dir(const char *path)
{
static const char *result = TERMINFO;
* 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.
*/
-void
+NCURSES_EXPORT(void)
_nc_keep_tic_dir(const char *path)
{
_nc_tic_dir(path);
}
}
-#define read_shorts(fd, buf, count) (read(fd, buf, (count)*2) == (count)*2)
+#define read_shorts(fd, buf, count) \
+ (read(fd, buf, (unsigned) (count)*2) == (int) (count)*2)
#define even_boundary(value) \
if ((value) % 2 != 0) read(fd, buf, 1)
static int
-read_termtype(int fd, TERMTYPE * ptr)
+read_termtype(int fd, TERMTYPE *ptr)
/* return 1 if read, 0 if not found or garbled */
{
int name_size, bool_count, num_count, str_count, str_size;
int i;
- char buf[MAX_ENTRY_SIZE];
+ char buf[MAX_ENTRY_SIZE + 1];
+ unsigned want, have;
- TR(TRACE_DATABASE, ("READ termtype header @%d", tell(fd)));
+ TR(TRACE_DATABASE, ("READ termtype header @%ld", (long) tell(fd)));
memset(ptr, 0, sizeof(*ptr));
return (0);
}
- _nc_free_termtype(ptr);
name_size = LOW_MSB(buf + 2);
bool_count = LOW_MSB(buf + 4);
num_count = LOW_MSB(buf + 6);
str_count = 0;
}
- /* grab the name (a null-terminate string) */
- read(fd, buf, min(MAX_NAME_SIZE, (unsigned) name_size));
- buf[MAX_NAME_SIZE] = '\0';
- ptr->term_names = typeCalloc(char, strlen(buf) + 1);
+ /* 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);
+ }
+ 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);
- if (name_size > MAX_NAME_SIZE)
- lseek(fd, (off_t) (name_size - MAX_NAME_SIZE), 1);
+ if (have > MAX_NAME_SIZE)
+ lseek(fd, (off_t) (have - MAX_NAME_SIZE), 1);
/* grab the booleans */
- if ((ptr->Booleans = typeCalloc(char, max(BOOLCOUNT, bool_count))) == 0
+ if ((ptr->Booleans = TYPE_CALLOC(char, max(BOOLCOUNT, bool_count))) == 0
|| read(fd, ptr->Booleans, (unsigned) bool_count) < bool_count) {
return (0);
}
even_boundary(name_size + bool_count);
/* grab the numbers */
- if ((ptr->Numbers = typeCalloc(short, max(NUMCOUNT, num_count))) == 0
+ if ((ptr->Numbers = TYPE_CALLOC(short, max(NUMCOUNT, num_count))) == 0
|| !read_shorts(fd, buf, num_count)) {
return (0);
}
convert_shorts(buf, ptr->Numbers, num_count);
- if ((ptr->Strings = typeCalloc(char *, max(STRCOUNT, str_count))) == 0)
+ if ((ptr->Strings = TYPE_CALLOC(char *, max(STRCOUNT, str_count))) == 0)
return (0);
if (str_count) {
* Read extended entries, if any, after the normal end of terminfo data.
*/
even_boundary(str_size);
- TR(TRACE_DATABASE, ("READ extended_header @%d", tell(fd)));
+ 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);
- int need = (ext_bool_count + ext_num_count + ext_str_count);
+ unsigned need = (ext_bool_count + ext_num_count + ext_str_count);
int base = 0;
- if (need >= (int) sizeof(buf)
+ if (need >= sizeof(buf)
|| ext_str_size >= (int) sizeof(buf)
|| ext_str_limit >= (int) sizeof(buf)
|| ext_bool_count < 0
ext_bool_count, ext_num_count, ext_str_count,
ext_str_size, ext_str_limit));
- TR(TRACE_DATABASE, ("READ %d extended-booleans @%d",
- ext_bool_count, tell(fd)));
+ 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)
}
even_boundary(ext_bool_count);
- TR(TRACE_DATABASE, ("READ %d extended-numbers @%d",
- ext_num_count, tell(fd)));
+ 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);
convert_shorts(buf, ptr->Numbers + NUMCOUNT, ext_num_count);
}
- TR(TRACE_DATABASE, ("READ extended-offsets @%d", tell(fd)));
+ TR(TRACE_DATABASE, ("READ extended-offsets @%ld", (long) tell(fd)));
if ((ext_str_count || need)
&& !read_shorts(fd, buf, ext_str_count + need))
return (0);
- TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%d",
- ext_str_limit, tell(fd)));
+ TR(TRACE_DATABASE, ("READ %d bytes of extended-strings @%ld",
+ ext_str_limit, (long) tell(fd)));
if (ext_str_limit) {
if ((ptr->ext_str_table = typeMalloc(char, ext_str_limit)) == 0)
return (0);
- if (read(fd, ptr->ext_str_table, ext_str_limit) != ext_str_limit)
+ if (read(fd, ptr->ext_str_table, (unsigned) ext_str_limit) != ext_str_limit)
return (0);
TR(TRACE_DATABASE, ("first extended-string is %s", _nc_visbuf(ptr->ext_str_table)));
}
}
if (need) {
- if ((ptr->ext_Names = typeCalloc(char *, need)) == 0)
+ if ((ptr->ext_Names = TYPE_CALLOC(char *, need)) == 0)
return (0);
TR(TRACE_DATABASE,
("ext_NAMES starting @%d in extended_strings, first = %s",
base, _nc_visbuf(ptr->ext_str_table + base)));
- convert_strings(buf + (2 * ext_str_count), ptr->ext_Names, need,
+ convert_strings(buf + (2 * ext_str_count),
+ ptr->ext_Names,
+ (int) need,
ext_str_limit, ptr->ext_str_table + base);
}
return (1);
}
-int
-_nc_read_file_entry(const char *const filename, TERMTYPE * ptr)
+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;
if (_nc_access(filename, R_OK) < 0
|| (fd = open(filename, O_RDONLY | O_BINARY)) < 0) {
T(("cannot open terminfo %s (errno=%d)", filename, errno));
- return (0);
+ code = 0;
+ } else {
+ T(("read terminfo %s", filename));
+ if ((code = read_termtype(fd, ptr)) == 0) {
+ _nc_free_termtype(ptr);
+ }
+ close(fd);
}
- T(("read terminfo %s", filename));
- if ((code = read_termtype(fd, ptr)) == 0)
- _nc_free_termtype(ptr);
- close(fd);
-
return (code);
}
*/
static int
_nc_read_tic_entry(char *const filename,
- const char *const dir, const char *ttn, TERMTYPE * const tp)
+ const char *const dir, const char *ttn, TERMTYPE *const tp)
{
-/* maximum safe length of terminfo root directory name */
-#define MAX_TPATH (PATH_MAX - MAX_ALIAS - 6)
+ int need = 2 + strlen(dir) + strlen(ttn);
- if (strlen(dir) > MAX_TPATH)
+ if (need > PATH_MAX)
return 0;
(void) sprintf(filename, "%s/%s", dir, ttn);
return _nc_read_file_entry(filename, tp);
*/
static int
_nc_read_terminfo_dirs(const char *dirs, char *const filename, const char *const
- ttn, TERMTYPE * const tp)
+ ttn, TERMTYPE *const tp)
{
char *list, *a;
const char *b;
for (;;) {
int c = *a;
- if (c == 0 || c == ':') {
+ if (c == 0 || c == NCURSES_PATHSEP) {
*a = 0;
if ((b + 1) >= a)
b = TERMINFO;
* overrun the file buffer.
*/
-int
-_nc_read_entry(const char *const tn, char *const filename, TERMTYPE * const tp)
+NCURSES_EXPORT(int)
+_nc_read_entry(const char *const tn, char *const filename, TERMTYPE *const tp)
{
char *envp;
- char ttn[MAX_ALIAS + 3];
+ 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;
+ }
- /* truncate the terminal name to prevent dangerous buffer airline */
- (void) sprintf(ttn, "%c/%.*s", *tn, MAX_ALIAS, tn);
+ /* truncate the terminal name to prevent buffer overflow */
+ (void) sprintf(ttn, "%c/%.*s", *tn, (int) sizeof(ttn) - 3, tn);
/* This is System V behavior, in conjunction with our requirements for
* writing terminfo entries.
/* this is an ncurses extension */
if ((envp = _nc_home_terminfo()) != 0) {
if (_nc_read_tic_entry(filename, envp, ttn, tp) == 1) {
- return (1);
+ return 1;
}
}
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