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/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
* write_entry.c -- write a terminfo structure onto the file system
*/
#include <curses.priv.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include "tic.h"
#include "term.h"
#include "term_entry.h"
#if !HAVE_EXTERN_ERRNO
extern int errno;
#endif
static int write_object(FILE *, TERMTYPE *);
static char *destination = TERMINFO;
/*
* check_writeable(void)
*
* Miscellaneous initialisations
*
* Check for access rights to destination directories
* Create any directories which don't exist.
*
*/
static void check_writeable(void)
{
struct stat statbuf;
char *dirnames = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
char envhome[PATH_MAX], homedir[PATH_MAX], dir[2];
if (getenv("TERMINFO") != NULL)
destination = getenv("TERMINFO");
if (access(destination, W_OK) < 0) {
char *home;
/* ncurses extension...fall back on user's private directory */
if ((home = getenv("HOME")) != (char *)NULL)
{
/* total paranoia -- avoid potential buffer spamming */
(void) strncpy(envhome, home, PATH_MAX-sizeof(PRIVATE_INFO)-1);
envhome[PATH_MAX-sizeof(PRIVATE_INFO)-1] = '\0';
(void) sprintf(homedir, PRIVATE_INFO, envhome);
if (access(homedir, X_OK) < 0)
mkdir(homedir, 0777);
destination = homedir;
}
}
if (access(destination, W_OK) < 0)
_nc_err_abort("%s: non-existant or permission denied (errno %d)",
destination, errno);
/*
* Note: because of this code, this function should be called
* *once only* per run.
*/
if (chdir(destination) < 0) {
_nc_err_abort("%s: not a directory", destination);
}
dir[1] = '\0';
for (dir[0] = *dirnames; *dirnames != '\0'; dir[0] = *(++dirnames)) {
if (stat(dir, &statbuf) < 0) {
mkdir(dir, 0755);
} else if (access(dir, 7) < 0) {
_nc_err_abort("%s/%s: permission denied",destination, dir);
}
#ifdef _POSIX_SOURCE
else if (!(S_ISDIR(statbuf.st_mode)))
#else
else if ((statbuf.st_mode & S_IFMT) != S_IFDIR)
#endif
_nc_err_abort("%s/%s: not a directory", destination,dir);
}
}
/*
* _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;
FILE *fp;
char name_list[MAX_TERMINFO_LENGTH];
char *first_name, *other_names;
char *ptr;
char filename[PATH_MAX];
char linkname[PATH_MAX];
#ifdef 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) {
check_writeable();
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.");
}
fp = fopen(filename, "w");
if (fp == NULL) {
perror(filename);
_nc_syserr_abort("can't open %s/%s", destination, filename);
}
DEBUG(1, ("Created %s", filename));
if (write_object(fp, tp) == ERR) {
_nc_syserr_abort("error writing %s/%s", destination, filename);
}
fclose(fp);
if (start_time == 0) {
if (stat(filename, &statbuf) < 0
|| (start_time = statbuf.st_mtime) == 0) {
_nc_syserr_abort("error obtaining time from %s/%s",
destination, 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;
}
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
{
#ifdef USE_SYMLINKS
strcpy(symlinkname, "../");
strcat(symlinkname, filename);
#endif /* USE_SYMLINKS */
unlink(linkname);
#ifndef USE_SYMLINKS
if (link(filename, linkname) < 0)
#else
if (symlink(symlinkname, linkname) < 0)
#endif /* USE_SYMLINKS */
_nc_syserr_abort("can't link %s to %s", filename, linkname);
DEBUG(1, ("Linked %s", linkname));
}
}
}
#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)
static int write_object(FILE *fp, TERMTYPE *tp)
{
char *namelist;
short namelen, boolmax, nummax, strmax;
char zero = '\0';
short i, nextfree;
short offsets[STRCOUNT];
unsigned char buf[MAX_ENTRY_SIZE];
namelist = tp->term_names;
namelen = strlen(namelist) + 1;
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 = 0;
for (i = 0; i < strmax; i++)
if (tp->Strings[i] == ABSENT_STRING)
offsets[i] = -1;
else if (tp->Strings[i] == CANCELLED_STRING)
offsets[i] = -2;
else
{
offsets[i] = nextfree;
nextfree += strlen(tp->Strings[i]) + 1;
}
/* 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 */
if (fwrite(buf, 12, 1, fp) != 1
|| fwrite(namelist, sizeof(char), (size_t)namelen, fp) != namelen
|| fwrite(tp->Booleans, sizeof(char), (size_t)boolmax, fp) != boolmax)
return(ERR);
/* the even-boundary padding byte */
if ((namelen+boolmax) % 2 != 0 && fwrite(&zero, sizeof(char), 1, fp) != 1)
return(ERR);
#ifdef SHOWOFFSET
(void) fprintf(stderr, "Numerics begin at %04lx\n", ftell(fp));
#endif /* SHOWOFFSET */
/* the numerics */
for (i = 0; i < nummax; i++)
{
if (tp->Numbers[i] == -1) /* HI/LO won't work */
buf[2*i] = buf[2*i + 1] = 0377;
else
LITTLE_ENDIAN(buf + 2*i, tp->Numbers[i]);
}
if (fwrite(buf, 2, (size_t)nummax, fp) != nummax)
return(ERR);
#ifdef SHOWOFFSET
(void) fprintf(stderr, "String offets begin at %04lx\n", ftell(fp));
#endif /* SHOWOFFSET */
/* the string offsets */
for (i = 0; i < strmax; i++)
if (offsets[i] == -1) /* HI/LO won't work */
buf[2*i] = buf[2*i + 1] = 0377;
else if (offsets[i] == -2) /* HI/LO won't work */
{
buf[2*i] = 0376;
buf[2*i + 1] = 0377;
}
else
LITTLE_ENDIAN(buf + 2*i, offsets[i]);
if (fwrite(buf, 2, (size_t)strmax, fp) != strmax)
return(ERR);
#ifdef SHOWOFFSET
(void) fprintf(stderr, "String table begins at %04lx\n", ftell(fp));
#endif /* SHOWOFFSET */
/* the strings */
for (i = 0; i < strmax; i++)
if (tp->Strings[i] != ABSENT_STRING && tp->Strings[i] != CANCELLED_STRING)
if (fwrite(tp->Strings[i], sizeof(char), strlen(tp->Strings[i]) + 1, fp) != strlen(tp->Strings[i]) + 1)
return(ERR);
return(OK);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.