/*************************************************************************** * 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 #include #include #include #include #ifndef S_ISDIR #define S_ISDIR(mode) ((mode & S_IFMT) == S_IFDIR) #endif MODULE_ID("$Id: write_entry.c,v 1.16 1997/05/10 17:33:12 tom Exp $") static int total_written; static int write_object(FILE *, TERMTYPE *); /* * 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 == '/') (void)strcpy(fullpath, path); else (void)sprintf(fullpath, "%s/%s", destination, path); if ((rc = stat(path, &statbuf)) < 0) { rc = mkdir(path, 0777); } else { if (access(path, R_OK|W_OK|X_OK) < 0) { _nc_err_abort("%s: permission denied", fullpath); } else if (!(S_ISDIR(statbuf.st_mode))) { _nc_err_abort("%s: not a directory", fullpath); } } return rc; } void _nc_set_writedir(char *dir) /* set the write directory for compiled entries */ { const char *destination; 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; /* ncurses extension...fall back on user's private directory */ if ((home = getenv("HOME")) != (char *)NULL) { char *temp = malloc(sizeof(PRIVATE_INFO) + strlen(home)); (void) sprintf(temp, PRIVATE_INFO, home); destination = temp; 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) _nc_err_abort("%s: not a directory", destination); } /* * check_writeable(char code) * * Miscellaneous initialisations * * Check for access rights to destination directories * Create any directories which don't exist. * */ 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'; (void) make_directory(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; FILE *fp; 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]); fp = fopen(filename, "w"); if (fp == NULL) { 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); 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; } 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 USE_SYMLINKS strcpy(symlinkname, "../"); strcat(symlinkname, filename); #endif /* USE_SYMLINKS */ unlink(linkname); #if USE_SYMLINKS if (symlink(symlinkname, linkname) < 0) #else if (link(filename, 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; size_t namelen, boolmax, nummax, strmax; char zero = '\0'; size_t i; short 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); total_written++; return(OK); } /* * Returns the total number of entries written by this process */ int _nc_tic_written(void) { return total_written; }