/* $OpenBSD: write_entry.c,v 1.5 1998/10/31 06:30:31 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 1992,1995 * * and: Eric S. Raymond * ****************************************************************************/ /* * 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("$From: write_entry.c,v 1.33 1998/09/19 21:24:11 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; 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) { if (make_directory(destination) < 0) _nc_err_abort("%s: permission denied (errno %d)", destination, errno); destination = home; } } /* * 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. * 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) 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 if (tp->Numbers[i] == -2) /* HI/LO won't work */ buf[2*i] = 0376, 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; }