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/* $OpenBSD: write_entry.c,v 1.4 1999/07/11 14:10:11 millert Exp $ */
/****************************************************************************
* Copyright (c) 1998 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 *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
****************************************************************************/
/*
* write_entry.c -- write a terminfo structure onto the file system
*/
#include <curses.priv.h>
#include <sys/stat.h>
#include <tic.h>
#include <term_entry.h>
#ifndef S_ISDIR
#define S_ISDIR(mode) ((mode & S_IFMT) == S_IFDIR)
#endif
#if 0
#define TRACE_OUT(p) DEBUG(2, p)
#else
#define TRACE_OUT(p) /*nothing*/
#endif
MODULE_ID("$From: write_entry.c,v 1.47 1999/07/10 20:29:22 tom Exp $")
static int total_written;
static int write_object(FILE *, TERMTYPE *);
static void write_file(char *filename, TERMTYPE *tp)
{
FILE *fp = (_nc_access(filename, W_OK) == 0) ? fopen(filename, "wb") : 0;
if (fp == 0) {
perror(filename);
_nc_syserr_abort("can't open %s/%s", _nc_tic_dir(0), filename);
}
DEBUG(1, ("Created %s", filename));
if (write_object(fp, tp) == ERR) {
_nc_syserr_abort("error writing %s/%s", _nc_tic_dir(0), filename);
}
fclose(fp);
}
/*
* make_directory(char *path)
*
* Make a directory if it doesn't exist.
*/
static int make_directory(const char *path)
{
int rc;
struct stat statbuf;
char fullpath[PATH_MAX];
const char *destination = _nc_tic_dir(0);
if (path == destination || *path == '/') {
if (strlen(path) + 1 > sizeof(fullpath))
return(-1);
(void)strcpy(fullpath, path);
} else {
if (strlen(destination) + strlen(path) + 2 > sizeof(fullpath))
return(-1);
(void)sprintf(fullpath, "%s/%s", destination, path);
}
if ((rc = stat(path, &statbuf)) < 0) {
rc = mkdir(path, 0777);
} else {
if (_nc_access(path, R_OK|W_OK|X_OK) < 0) {
rc = -1; /* permission denied */
} else if (!(S_ISDIR(statbuf.st_mode))) {
rc = -1; /* not a directory */
}
}
return rc;
}
void _nc_set_writedir(char *dir)
/* set the write directory for compiled entries */
{
const char *destination;
char actual[PATH_MAX];
if (dir != 0)
(void) _nc_tic_dir(dir);
else if (getenv("TERMINFO") != NULL)
(void) _nc_tic_dir(getenv("TERMINFO"));
destination = _nc_tic_dir(0);
if (make_directory(destination) < 0)
{
char *home = _nc_home_terminfo();
if (home != 0) {
destination = home;
if (make_directory(destination) < 0)
_nc_err_abort("%s: permission denied (errno %d)",
destination, errno);
}
}
/*
* Note: because of this code, this logic should be exercised
* *once only* per run.
*/
if (chdir(_nc_tic_dir(destination)) < 0
|| getcwd(actual, sizeof(actual)) == 0)
_nc_err_abort("%s: not a directory", destination);
_nc_keep_tic_dir(strdup(actual));
}
/*
* check_writeable(char code)
*
* Miscellaneous initialisations
*
* Check for access rights to destination directories
* Create any directories which don't exist.
* Note: there's no reason to return the result of make_directory(), since
* this function is called only in instances where that has to succeed.
*
*/
static void check_writeable(int code)
{
static const char dirnames[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
static bool verified[sizeof(dirnames)];
char dir[2];
char *s;
if (code == 0 || (s = strchr(dirnames, code)) == 0)
_nc_err_abort("Illegal terminfo subdirectory \"%c\"", code);
if (verified[s-dirnames])
return;
dir[0] = code;
dir[1] = '\0';
if (make_directory(dir) < 0) {
_nc_err_abort("%s/%s: permission denied", _nc_tic_dir(0), dir);
}
verified[s-dirnames] = TRUE;
}
/*
* _nc_write_entry()
*
* Save the compiled version of a description in the filesystem.
*
* make a copy of the name-list
* break it up into first-name and all-but-last-name
* creat(first-name)
* write object information to first-name
* close(first-name)
* for each name in all-but-last-name
* link to first-name
*
* Using 'time()' to obtain a reference for file timestamps is unreliable,
* e.g., with NFS, because the filesystem may have a different time
* reference. We check for pre-existence of links by latching the first
* timestamp from a file that we create.
*
* The _nc_warning() calls will report a correct line number only if
* _nc_curr_line is properly set before the write_entry() call.
*/
void _nc_write_entry(TERMTYPE *const tp)
{
struct stat statbuf;
char name_list[MAX_TERMINFO_LENGTH];
char *first_name, *other_names;
char *ptr;
char filename[PATH_MAX];
char linkname[PATH_MAX];
#if USE_SYMLINKS
char symlinkname[PATH_MAX];
#endif /* USE_SYMLINKS */
static int call_count;
static time_t start_time; /* time at start of writes */
if (call_count++ == 0) {
start_time = 0;
}
(void) strcpy(name_list, tp->term_names);
DEBUG(7, ("Name list = '%s'", name_list));
first_name = name_list;
ptr = &name_list[strlen(name_list) - 1];
other_names = ptr + 1;
while (ptr > name_list && *ptr != '|')
ptr--;
if (ptr != name_list) {
*ptr = '\0';
for (ptr = name_list; *ptr != '\0' && *ptr != '|'; ptr++)
continue;
if (*ptr == '\0')
other_names = ptr;
else {
*ptr = '\0';
other_names = ptr + 1;
}
}
DEBUG(7, ("First name = '%s'", first_name));
DEBUG(7, ("Other names = '%s'", other_names));
_nc_set_type(first_name);
if (strlen(first_name) > sizeof(filename)-3)
_nc_warning("terminal name too long.");
sprintf(filename, "%c/%s", first_name[0], first_name);
/*
* Has this primary name been written since the first call to
* write_entry()? If so, the newer write will step on the older,
* so warn the user.
*/
if (start_time > 0 &&
stat(filename, &statbuf) >= 0
&& statbuf.st_mtime >= start_time)
{
_nc_warning("name multiply defined.");
}
check_writeable(first_name[0]);
write_file(filename, tp);
if (start_time == 0) {
if (stat(filename, &statbuf) < 0
|| (start_time = statbuf.st_mtime) == 0) {
_nc_syserr_abort("error obtaining time from %s/%s",
_nc_tic_dir(0), filename);
}
}
while (*other_names != '\0') {
ptr = other_names++;
while (*other_names != '|' && *other_names != '\0')
other_names++;
if (*other_names != '\0')
*(other_names++) = '\0';
if (strlen(ptr) > sizeof(linkname)-3) {
_nc_warning("terminal alias %s too long.", ptr);
continue;
}
if (strchr(ptr, '/') != 0) {
_nc_warning("cannot link alias %s.", ptr);
continue;
}
check_writeable(ptr[0]);
sprintf(linkname, "%c/%s", ptr[0], ptr);
if (strcmp(filename, linkname) == 0) {
_nc_warning("self-synonym ignored");
}
else if (stat(linkname, &statbuf) >= 0 &&
statbuf.st_mtime < start_time)
{
_nc_warning("alias %s multiply defined.", ptr);
}
else if (_nc_access(linkname, W_OK) == 0)
#if HAVE_LINK
{
int code;
#if USE_SYMLINKS
strcpy(symlinkname, "../");
strncat(symlinkname, filename, sizeof(symlinkname) - 4);
symlinkname[sizeof(symlinkname) - 1] = '\0';
#endif /* USE_SYMLINKS */
#if HAVE_REMOVE
code = remove(linkname);
#else
code = unlink(linkname);
#endif
if (code != 0 && errno == ENOENT)
code = 0;
#if USE_SYMLINKS
if (symlink(symlinkname, linkname) < 0)
#else
if (link(filename, linkname) < 0)
#endif /* USE_SYMLINKS */
{
/*
* If there wasn't anything there, and we cannot
* link to the target because it is the same as the
* target, then the source must be on a filesystem
* that uses caseless filenames, such as Win32, etc.
*/
if (code == 0 && errno == EEXIST)
_nc_warning("can't link %s to %s", filename, linkname);
else if (code == 0 && errno == EPERM)
write_file(linkname, tp);
else
_nc_syserr_abort("can't link %s to %s", filename, linkname);
}
else
{
DEBUG(1, ("Linked %s", linkname));
}
}
#else /* just make copies */
write_file(linkname, tp);
#endif /* HAVE_LINK */
}
}
#undef LITTLE_ENDIAN /* BSD/OS defines this as a feature macro */
#define HI(x) ((x) / 256)
#define LO(x) ((x) % 256)
#define LITTLE_ENDIAN(p, x) (p)[0] = LO(x), (p)[1] = HI(x)
#define WRITE_STRING(str) (fwrite(str, sizeof(char), strlen(str) + 1, fp) == strlen(str) + 1)
static int compute_offsets(char **Strings, int strmax, short *offsets)
{
size_t nextfree = 0;
int i;
for (i = 0; i < strmax; i++) {
if (Strings[i] == ABSENT_STRING) {
offsets[i] = -1;
} else if (Strings[i] == CANCELLED_STRING) {
offsets[i] = -2;
} else {
offsets[i] = nextfree;
nextfree += strlen(Strings[i]) + 1;
TRACE_OUT(("put Strings[%d]=%s(%d)", i, _nc_visbuf(Strings[i]), nextfree));
}
}
return nextfree;
}
static void convert_shorts(unsigned char *buf, short *Numbers, int count)
{
int i;
for (i = 0; i < count; i++) {
if (Numbers[i] == -1) { /* HI/LO won't work */
buf[2*i] = buf[2*i + 1] = 0377;
} else if (Numbers[i] == -2) { /* HI/LO won't work */
buf[2*i] = 0376;
buf[2*i + 1] = 0377;
} else {
LITTLE_ENDIAN(buf + 2*i, Numbers[i]);
TRACE_OUT(("put Numbers[%d]=%d", i, Numbers[i]));
}
}
}
#define even_boundary(value) \
((value) % 2 != 0 && fwrite(&zero, sizeof(char), 1, fp) != 1)
static int write_object(FILE *fp, TERMTYPE *tp)
{
char *namelist;
size_t namelen, boolmax, nummax, strmax;
char zero = '\0';
size_t i;
short nextfree;
short offsets[MAX_ENTRY_SIZE/2];
unsigned char buf[MAX_ENTRY_SIZE];
namelist = tp->term_names;
namelen = strlen(namelist) + 1;
/*
* BOOLWRITE, etc., are less than BOOLCOUNT because we store some
* values internally.
*/
boolmax = 0;
for (i = 0; i < BOOLWRITE; i++) {
if (tp->Booleans[i])
boolmax = i+1;
}
nummax = 0;
for (i = 0; i < NUMWRITE; i++) {
if (tp->Numbers[i] != ABSENT_NUMERIC)
nummax = i+1;
}
strmax = 0;
for (i = 0; i < STRWRITE; i++) {
if (tp->Strings[i] != ABSENT_STRING)
strmax = i+1;
}
nextfree = compute_offsets(tp->Strings, strmax, offsets);
/* fill in the header */
LITTLE_ENDIAN(buf, MAGIC);
LITTLE_ENDIAN(buf+2, min(namelen, MAX_NAME_SIZE + 1));
LITTLE_ENDIAN(buf+4, boolmax);
LITTLE_ENDIAN(buf+6, nummax);
LITTLE_ENDIAN(buf+8, strmax);
LITTLE_ENDIAN(buf+10, nextfree);
/* write out the header */
TRACE_OUT(("Header of %s @%ld", namelist, ftell(fp)));
if (fwrite(buf, 12, 1, fp) != 1
|| fwrite(namelist, sizeof(char), namelen, fp) != namelen
|| fwrite(tp->Booleans, sizeof(char), boolmax, fp) != boolmax)
return(ERR);
if (even_boundary(namelen+boolmax))
return(ERR);
TRACE_OUT(("Numerics begin at %04lx", ftell(fp)));
/* the numerics */
convert_shorts(buf, tp->Numbers, nummax);
if (fwrite(buf, 2, nummax, fp) != nummax)
return(ERR);
TRACE_OUT(("String offsets begin at %04lx", ftell(fp)));
/* the string offsets */
convert_shorts(buf, offsets, strmax);
if (fwrite(buf, 2, strmax, fp) != strmax)
return(ERR);
TRACE_OUT(("String table begins at %04lx", ftell(fp)));
/* the strings */
for (i = 0; i < strmax; i++)
if (VALID_STRING(tp->Strings[i]))
if (!WRITE_STRING(tp->Strings[i]))
return(ERR);
#if NCURSES_XNAMES
if (NUM_EXT_NAMES(tp)) {
unsigned extcnt = NUM_EXT_NAMES(tp);
if (even_boundary(nextfree))
return(ERR);
nextfree = compute_offsets(tp->Strings + STRCOUNT, tp->ext_Strings, offsets);
TRACE_OUT(("after extended string capabilities, nextfree=%d", nextfree));
nextfree += compute_offsets(tp->ext_Names, extcnt, offsets + tp->ext_Strings);
TRACE_OUT(("after extended capnames, nextfree=%d", nextfree));
strmax = tp->ext_Strings + extcnt;
/*
* Write the extended header
*/
LITTLE_ENDIAN(buf+0, tp->ext_Booleans);
LITTLE_ENDIAN(buf+2, tp->ext_Numbers);
LITTLE_ENDIAN(buf+4, tp->ext_Strings);
LITTLE_ENDIAN(buf+6, strmax);
LITTLE_ENDIAN(buf+8, nextfree);
TRACE_OUT(("WRITE extended-header @%ld", ftell(fp)));
if (fwrite(buf, 10, 1, fp) != 1)
return(ERR);
TRACE_OUT(("WRITE %d booleans @%ld", tp->ext_Booleans, ftell(fp)));
if (tp->ext_Booleans
&& fwrite(tp->Booleans + BOOLCOUNT, sizeof(char), tp->ext_Booleans, fp) != tp->ext_Booleans)
return(ERR);
if (even_boundary(tp->ext_Booleans))
return(ERR);
TRACE_OUT(("WRITE %d numbers @%ld", tp->ext_Numbers, ftell(fp)));
if (tp->ext_Numbers) {
convert_shorts(buf, tp->Numbers + NUMCOUNT, tp->ext_Numbers);
if (fwrite(buf, 2, tp->ext_Numbers, fp) != tp->ext_Numbers)
return(ERR);
}
/*
* Convert the offsets for the ext_Strings and ext_Names tables,
* in that order.
*/
convert_shorts(buf, offsets, strmax);
TRACE_OUT(("WRITE offsets @%ld", ftell(fp)));
if (fwrite(buf, 2, strmax, fp) != strmax)
return(ERR);
/*
* Write the string table after the offset tables so we do not
* have to do anything about alignment.
*/
for (i = 0; i < tp->ext_Strings; i++) {
if (VALID_STRING(tp->Strings[i+STRCOUNT])) {
TRACE_OUT(("WRITE ext_Strings[%d]=%s", i, _nc_visbuf(tp->Strings[i+STRCOUNT])));
if (!WRITE_STRING(tp->Strings[i+STRCOUNT]))
return(ERR);
}
}
/*
* Write the extended names
*/
for (i = 0; i < extcnt; i++) {
TRACE_OUT(("WRITE ext_Names[%d]=%s", i, tp->ext_Names[i]));
if (!WRITE_STRING(tp->ext_Names[i]))
return(ERR);
}
}
#endif /* NCURSES_XNAMES */
total_written++;
return(OK);
}
/*
* Returns the total number of entries written by this process
*/
int _nc_tic_written(void)
{
return total_written;
}
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