/* $OpenBSD: file.c,v 1.6 1998/05/18 20:38:20 deraadt Exp $ */ /* $NetBSD: file.c,v 1.11 1996/11/08 19:34:37 christos Exp $ */ /*- * Copyright (c) 1980, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)file.c 8.2 (Berkeley) 3/19/94"; #else static char rcsid[] = "$OpenBSD: file.c,v 1.6 1998/05/18 20:38:20 deraadt Exp $"; #endif #endif /* not lint */ #ifdef FILEC #include <sys/param.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <termios.h> #include <dirent.h> #include <pwd.h> #include <stdlib.h> #include <unistd.h> #ifndef SHORT_STRINGS #include <string.h> #endif /* SHORT_STRINGS */ #ifdef __STDC__ # include <stdarg.h> #else # include <varargs.h> #endif #include "csh.h" #include "extern.h" /* * Tenex style file name recognition, .. and more. * History: * Author: Ken Greer, Sept. 1975, CMU. * Finally got around to adding to the Cshell., Ken Greer, Dec. 1981. */ #define ON 1 #define OFF 0 #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #define ESC '\033' typedef enum { LIST, RECOGNIZE } COMMAND; static void setup_tty __P((int)); static void back_to_col_1 __P((void)); static void pushback __P((Char *)); static void catn __P((Char *, Char *, int)); static void copyn __P((Char *, Char *, int)); static Char filetype __P((Char *, Char *)); static void print_by_column __P((Char *, Char *[], int)); static Char *tilde __P((Char *, Char *)); static void retype __P((void)); static void beep __P((void)); static void print_recognized_stuff __P((Char *)); static void extract_dir_and_name __P((Char *, Char *, Char *)); static Char *getentry __P((DIR *, int)); static void free_items __P((Char **)); static int tsearch __P((Char *, COMMAND, int)); static int recognize __P((Char *, Char *, int, int)); static int is_prefix __P((Char *, Char *)); static int is_suffix __P((Char *, Char *)); static int ignored __P((Char *)); /* * Put this here so the binary can be patched with adb to enable file * completion by default. Filec controls completion, nobeep controls * ringing the terminal bell on incomplete expansions. */ bool filec = 0; static void setup_tty(on) int on; { struct termios tchars; (void) tcgetattr(SHIN, &tchars); if (on) { tchars.c_cc[VEOL] = ESC; if (tchars.c_lflag & ICANON) on = TCSADRAIN; else { tchars.c_lflag |= ICANON; on = TCSAFLUSH; } } else { tchars.c_cc[VEOL] = _POSIX_VDISABLE; on = TCSADRAIN; } (void) tcsetattr(SHIN, on, &tchars); } /* * Move back to beginning of current line */ static void back_to_col_1() { struct termios tty, tty_normal; sigset_t sigset, osigset; sigemptyset(&sigset); sigaddset(&sigset, SIGINT); sigprocmask(SIG_BLOCK, &sigset, &osigset); (void) tcgetattr(SHOUT, &tty); tty_normal = tty; tty.c_iflag &= ~INLCR; tty.c_oflag &= ~ONLCR; (void) tcsetattr(SHOUT, TCSADRAIN, &tty); (void) write(SHOUT, "\r", 1); (void) tcsetattr(SHOUT, TCSADRAIN, &tty_normal); sigprocmask(SIG_SETMASK, &osigset, NULL); } /* * Push string contents back into tty queue */ static void pushback(string) Char *string; { register Char *p; struct termios tty, tty_normal; sigset_t sigset, osigset; char c; sigemptyset(&sigset); sigaddset(&sigset, SIGINT); sigprocmask(SIG_BLOCK, &sigset, &osigset); (void) tcgetattr(SHOUT, &tty); tty_normal = tty; tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOCTL); (void) tcsetattr(SHOUT, TCSADRAIN, &tty); for (p = string; (c = *p) != '\0'; p++) (void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c); (void) tcsetattr(SHOUT, TCSADRAIN, &tty_normal); sigprocmask(SIG_SETMASK, &osigset, NULL); } /* * Concatenate src onto tail of des. * Des is a string whose maximum length is count. * Always null terminate. */ static void catn(des, src, count) register Char *des, *src; register int count; { while (--count >= 0 && *des) des++; while (--count >= 0) if ((*des++ = *src++) == 0) return; *des = '\0'; } /* * Like strncpy but always leave room for trailing \0 * and always null terminate. */ static void copyn(des, src, count) register Char *des, *src; register int count; { while (--count >= 0) if ((*des++ = *src++) == 0) return; *des = '\0'; } static Char filetype(dir, file) Char *dir, *file; { Char path[MAXPATHLEN]; struct stat statb; catn(Strcpy(path, dir), file, sizeof(path) / sizeof(Char)); if (lstat(short2str(path), &statb) == 0) { switch (statb.st_mode & S_IFMT) { case S_IFDIR: return ('/'); case S_IFLNK: if (stat(short2str(path), &statb) == 0 && /* follow it out */ S_ISDIR(statb.st_mode)) return ('>'); else return ('@'); case S_IFSOCK: return ('='); default: if (statb.st_mode & 0111) return ('*'); } } return (' '); } static struct winsize win; /* * Print sorted down columns */ static void print_by_column(dir, items, count) Char *dir, *items[]; int count; { register int i, rows, r, c, maxwidth = 0, columns; if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0) win.ws_col = 80; for (i = 0; i < count; i++) maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r; maxwidth += 2; /* for the file tag and space */ columns = win.ws_col / maxwidth; if (columns == 0) columns = 1; rows = (count + (columns - 1)) / columns; for (r = 0; r < rows; r++) { for (c = 0; c < columns; c++) { i = c * rows + r; if (i < count) { register int w; (void) fprintf(cshout, "%s", vis_str(items[i])); (void) fputc(dir ? filetype(dir, items[i]) : ' ', cshout); if (c < columns - 1) { /* last column? */ w = Strlen(items[i]) + 1; for (; w < maxwidth; w++) (void) fputc(' ', cshout); } } } (void) fputc('\r', cshout); (void) fputc('\n', cshout); } } /* * Expand file name with possible tilde usage * ~person/mumble * expands to * home_directory_of_person/mumble */ static Char * tilde(new, old) Char *new, *old; { register Char *o, *p; register struct passwd *pw; static Char person[40]; if (old[0] != '~') return (Strcpy(new, old)); for (p = person, o = &old[1]; *o && *o != '/'; *p++ = *o++) continue; *p = '\0'; if (person[0] == '\0') (void) Strcpy(new, value(STRhome)); else { pw = getpwnam(short2str(person)); if (pw == NULL) return (NULL); (void) Strcpy(new, str2short(pw->pw_dir)); } (void) Strcat(new, o); return (new); } /* * Cause pending line to be printed */ static void retype() { struct termios tty; (void) tcgetattr(SHOUT, &tty); tty.c_lflag |= PENDIN; (void) tcsetattr(SHOUT, TCSADRAIN, &tty); } static void beep() { if (adrof(STRnobeep) == 0) (void) write(SHOUT, "\007", 1); } /* * Erase that silly ^[ and * print the recognized part of the string */ static void print_recognized_stuff(recognized_part) Char *recognized_part; { /* An optimized erasing of that silly ^[ */ (void) fputc('\b', cshout); (void) fputc('\b', cshout); switch (Strlen(recognized_part)) { case 0: /* erase two Characters: ^[ */ (void) fputc(' ', cshout); (void) fputc(' ', cshout); (void) fputc('\b', cshout); (void) fputc('\b', cshout); break; case 1: /* overstrike the ^, erase the [ */ (void) fprintf(cshout, "%s", vis_str(recognized_part)); (void) fputc(' ', cshout); (void) fputc('\b', cshout); break; default: /* overstrike both Characters ^[ */ (void) fprintf(cshout, "%s", vis_str(recognized_part)); break; } (void) fflush(cshout); } /* * Parse full path in file into 2 parts: directory and file names * Should leave final slash (/) at end of dir. */ static void extract_dir_and_name(path, dir, name) Char *path, *dir, *name; { register Char *p; p = Strrchr(path, '/'); if (p == NULL) { copyn(name, path, MAXNAMLEN); dir[0] = '\0'; } else { copyn(name, ++p, MAXNAMLEN); copyn(dir, path, p - path); } } static Char * getentry(dir_fd, looking_for_lognames) DIR *dir_fd; int looking_for_lognames; { register struct passwd *pw; register struct dirent *dirp; if (looking_for_lognames) { if ((pw = getpwent()) == NULL) return (NULL); return (str2short(pw->pw_name)); } if ((dirp = readdir(dir_fd)) != NULL) return (str2short(dirp->d_name)); return (NULL); } static void free_items(items) register Char **items; { register int i; for (i = 0; items[i]; i++) xfree((ptr_t) items[i]); xfree((ptr_t) items); } #define FREE_ITEMS(items) { \ sigset_t sigset, osigset;\ \ sigemptyset(&sigset);\ sigaddset(&sigset, SIGINT);\ sigprocmask(SIG_BLOCK, &sigset, &osigset);\ free_items(items);\ items = NULL;\ sigprocmask(SIG_SETMASK, &osigset, NULL);\ } /* * Perform a RECOGNIZE or LIST command on string "word". */ static int tsearch(word, command, max_word_length) Char *word; COMMAND command; int max_word_length; { static Char **items = NULL; register DIR *dir_fd; register numitems = 0, ignoring = TRUE, nignored = 0; register name_length, looking_for_lognames; Char tilded_dir[MAXPATHLEN], dir[MAXPATHLEN]; Char name[MAXNAMLEN + 1], extended_name[MAXNAMLEN + 1]; Char *entry; #define MAXITEMS 1024 if (items != NULL) FREE_ITEMS(items); looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL); if (looking_for_lognames) { (void) setpwent(); copyn(name, &word[1], MAXNAMLEN); /* name sans ~ */ dir_fd = NULL; } else { extract_dir_and_name(word, dir, name); if (tilde(tilded_dir, dir) == 0) return (0); dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : "."); if (dir_fd == NULL) return (0); } again: /* search for matches */ name_length = Strlen(name); for (numitems = 0; (entry = getentry(dir_fd, looking_for_lognames)) != NULL;) { if (!is_prefix(name, entry)) continue; /* Don't match . files on null prefix match */ if (name_length == 0 && entry[0] == '.' && !looking_for_lognames) continue; if (command == LIST) { if (numitems >= MAXITEMS) { (void) fprintf(csherr, "\nYikes!! Too many %s!!\n", looking_for_lognames ? "names in password file" : "files"); break; } if (items == NULL) items = (Char **) xcalloc(sizeof(items[0]), MAXITEMS); items[numitems] = (Char *) xmalloc((size_t) (Strlen(entry) + 1) * sizeof(Char)); copyn(items[numitems], entry, MAXNAMLEN); numitems++; } else { /* RECOGNIZE command */ if (ignoring && ignored(entry)) nignored++; else if (recognize(extended_name, entry, name_length, ++numitems)) break; } } if (ignoring && numitems == 0 && nignored > 0) { ignoring = FALSE; nignored = 0; if (looking_for_lognames) (void) setpwent(); else rewinddir(dir_fd); goto again; } if (looking_for_lognames) (void) endpwent(); else (void) closedir(dir_fd); if (numitems == 0) return (0); if (command == RECOGNIZE) { if (looking_for_lognames) copyn(word, STRtilde, 1); else /* put back dir part */ copyn(word, dir, max_word_length); /* add extended name */ catn(word, extended_name, max_word_length); return (numitems); } else { /* LIST */ qsort((ptr_t) items, numitems, sizeof(items[0]), (int (*) __P((const void *, const void *))) sortscmp); print_by_column(looking_for_lognames ? NULL : tilded_dir, items, numitems); if (items != NULL) FREE_ITEMS(items); } return (0); } /* * Object: extend what user typed up to an ambiguity. * Algorithm: * On first match, copy full entry (assume it'll be the only match) * On subsequent matches, shorten extended_name to the first * Character mismatch between extended_name and entry. * If we shorten it back to the prefix length, stop searching. */ static int recognize(extended_name, entry, name_length, numitems) Char *extended_name, *entry; int name_length, numitems; { if (numitems == 1) /* 1st match */ copyn(extended_name, entry, MAXNAMLEN); else { /* 2nd & subsequent matches */ register Char *x, *ent; register int len = 0; x = extended_name; for (ent = entry; *x && *x == *ent++; x++, len++) continue; *x = '\0'; /* Shorten at 1st Char diff */ if (len == name_length) /* Ambiguous to prefix? */ return (-1); /* So stop now and save time */ } return (0); } /* * Return true if check matches initial Chars in template. * This differs from PWB imatch in that if check is null * it matches anything. */ static int is_prefix(check, template) register Char *check, *template; { do if (*check == 0) return (TRUE); while (*check++ == *template++); return (FALSE); } /* * Return true if the Chars in template appear at the * end of check, I.e., are it's suffix. */ static int is_suffix(check, template) Char *check, *template; { register Char *c, *t; for (c = check; *c++;) continue; for (t = template; *t++;) continue; for (;;) { if (t == template) return 1; if (c == check || *--t != *--c) return 0; } } int tenex(inputline, inputline_size) Char *inputline; int inputline_size; { register int numitems, num_read; char tinputline[BUFSIZ]; setup_tty(ON); while ((num_read = read(SHIN, tinputline, BUFSIZ)) > 0) { int i; static Char delims[] = {' ', '\'', '"', '\t', ';', '&', '<', '>', '(', ')', '|', '^', '%', '\0'}; register Char *str_end, *word_start, last_Char, should_retype; register int space_left; COMMAND command; for (i = 0; i < num_read; i++) inputline[i] = (unsigned char) tinputline[i]; last_Char = inputline[num_read - 1] & ASCII; if (last_Char == '\n' || num_read == inputline_size) break; command = (last_Char == ESC) ? RECOGNIZE : LIST; if (command == LIST) (void) fputc('\n', cshout); str_end = &inputline[num_read]; if (last_Char == ESC) --str_end; /* wipeout trailing cmd Char */ *str_end = '\0'; /* * Find LAST occurrence of a delimiter in the inputline. The word start * is one Character past it. */ for (word_start = str_end; word_start > inputline; --word_start) if (Strchr(delims, word_start[-1])) break; space_left = inputline_size - (word_start - inputline) - 1; numitems = tsearch(word_start, command, space_left); if (command == RECOGNIZE) { /* print from str_end on */ print_recognized_stuff(str_end); if (numitems != 1) /* Beep = No match/ambiguous */ beep(); } /* * Tabs in the input line cause trouble after a pushback. tty driver * won't backspace over them because column positions are now * incorrect. This is solved by retyping over current line. */ should_retype = FALSE; if (Strchr(inputline, '\t')) { /* tab Char in input line? */ back_to_col_1(); should_retype = TRUE; } if (command == LIST) /* Always retype after a LIST */ should_retype = TRUE; if (should_retype) printprompt(); pushback(inputline); if (should_retype) retype(); } setup_tty(OFF); return (num_read); } static int ignored(entry) register Char *entry; { struct varent *vp; register Char **cp; if ((vp = adrof(STRfignore)) == NULL || (cp = vp->vec) == NULL) return (FALSE); for (; *cp != NULL; cp++) if (is_suffix(entry, *cp)) return (TRUE); return (FALSE); } #endif /* FILEC */