/bin/sh/histedit.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 501 lines · 361 code · 39 blank · 101 comment · 132 complexity · 1afa2b353122d5235bcaf207e615bd6a MD5 · raw file
- /*-
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * 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.
- * 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[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
- #endif
- #endif /* not lint */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include <sys/param.h>
- #include <limits.h>
- #include <paths.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- /*
- * Editline and history functions (and glue).
- */
- #include "shell.h"
- #include "parser.h"
- #include "var.h"
- #include "options.h"
- #include "main.h"
- #include "output.h"
- #include "mystring.h"
- #ifndef NO_HISTORY
- #include "myhistedit.h"
- #include "error.h"
- #include "eval.h"
- #include "memalloc.h"
- #include "builtins.h"
- #define MAXHISTLOOPS 4 /* max recursions through fc */
- #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
- History *hist; /* history cookie */
- EditLine *el; /* editline cookie */
- int displayhist;
- static FILE *el_in, *el_out, *el_err;
- static char *fc_replace(const char *, char *, char *);
- static int not_fcnumber(const char *);
- static int str_to_event(const char *, int);
- /*
- * Set history and editing status. Called whenever the status may
- * have changed (figures out what to do).
- */
- void
- histedit(void)
- {
- #define editing (Eflag || Vflag)
- if (iflag) {
- if (!hist) {
- /*
- * turn history on
- */
- INTOFF;
- hist = history_init();
- INTON;
- if (hist != NULL)
- sethistsize(histsizeval());
- else
- out2fmt_flush("sh: can't initialize history\n");
- }
- if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
- /*
- * turn editing on
- */
- char *term;
- INTOFF;
- if (el_in == NULL)
- el_in = fdopen(0, "r");
- if (el_err == NULL)
- el_err = fdopen(1, "w");
- if (el_out == NULL)
- el_out = fdopen(2, "w");
- if (el_in == NULL || el_err == NULL || el_out == NULL)
- goto bad;
- term = lookupvar("TERM");
- if (term)
- setenv("TERM", term, 1);
- else
- unsetenv("TERM");
- el = el_init(arg0, el_in, el_out, el_err);
- if (el != NULL) {
- if (hist)
- el_set(el, EL_HIST, history, hist);
- el_set(el, EL_PROMPT, getprompt);
- el_set(el, EL_ADDFN, "sh-complete",
- "Filename completion",
- _el_fn_sh_complete);
- } else {
- bad:
- out2fmt_flush("sh: can't initialize editing\n");
- }
- INTON;
- } else if (!editing && el) {
- INTOFF;
- el_end(el);
- el = NULL;
- INTON;
- }
- if (el) {
- if (Vflag)
- el_set(el, EL_EDITOR, "vi");
- else if (Eflag)
- el_set(el, EL_EDITOR, "emacs");
- el_set(el, EL_BIND, "^I", "sh-complete", NULL);
- el_source(el, NULL);
- }
- } else {
- INTOFF;
- if (el) { /* no editing if not interactive */
- el_end(el);
- el = NULL;
- }
- if (hist) {
- history_end(hist);
- hist = NULL;
- }
- INTON;
- }
- }
- void
- sethistsize(const char *hs)
- {
- int histsize;
- HistEvent he;
- if (hist != NULL) {
- if (hs == NULL || *hs == '\0' ||
- (histsize = atoi(hs)) < 0)
- histsize = 100;
- history(hist, &he, H_SETSIZE, histsize);
- history(hist, &he, H_SETUNIQUE, 1);
- }
- }
- void
- setterm(const char *term)
- {
- if (rootshell && el != NULL && term != NULL)
- el_set(el, EL_TERMINAL, term);
- }
- int
- histcmd(int argc, char **argv __unused)
- {
- int ch;
- const char *editor = NULL;
- HistEvent he;
- int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
- int i, retval;
- const char *firststr, *laststr;
- int first, last, direction;
- char *pat = NULL, *repl = NULL;
- static int active = 0;
- struct jmploc jmploc;
- struct jmploc *savehandler;
- char editfilestr[PATH_MAX];
- char *volatile editfile;
- FILE *efp = NULL;
- int oldhistnum;
- if (hist == NULL)
- error("history not active");
- if (argc == 1)
- error("missing history argument");
- while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
- switch ((char)ch) {
- case 'e':
- editor = shoptarg;
- break;
- case 'l':
- lflg = 1;
- break;
- case 'n':
- nflg = 1;
- break;
- case 'r':
- rflg = 1;
- break;
- case 's':
- sflg = 1;
- break;
- }
- savehandler = handler;
- /*
- * If executing...
- */
- if (lflg == 0 || editor || sflg) {
- lflg = 0; /* ignore */
- editfile = NULL;
- /*
- * Catch interrupts to reset active counter and
- * cleanup temp files.
- */
- if (setjmp(jmploc.loc)) {
- active = 0;
- if (editfile)
- unlink(editfile);
- handler = savehandler;
- longjmp(handler->loc, 1);
- }
- handler = &jmploc;
- if (++active > MAXHISTLOOPS) {
- active = 0;
- displayhist = 0;
- error("called recursively too many times");
- }
- /*
- * Set editor.
- */
- if (sflg == 0) {
- if (editor == NULL &&
- (editor = bltinlookup("FCEDIT", 1)) == NULL &&
- (editor = bltinlookup("EDITOR", 1)) == NULL)
- editor = DEFEDITOR;
- if (editor[0] == '-' && editor[1] == '\0') {
- sflg = 1; /* no edit */
- editor = NULL;
- }
- }
- }
- /*
- * If executing, parse [old=new] now
- */
- if (lflg == 0 && *argptr != NULL &&
- ((repl = strchr(*argptr, '=')) != NULL)) {
- pat = *argptr;
- *repl++ = '\0';
- argptr++;
- }
- /*
- * determine [first] and [last]
- */
- if (*argptr == NULL) {
- firststr = lflg ? "-16" : "-1";
- laststr = "-1";
- } else if (argptr[1] == NULL) {
- firststr = argptr[0];
- laststr = lflg ? "-1" : argptr[0];
- } else if (argptr[2] == NULL) {
- firststr = argptr[0];
- laststr = argptr[1];
- } else
- error("too many arguments");
- /*
- * Turn into event numbers.
- */
- first = str_to_event(firststr, 0);
- last = str_to_event(laststr, 1);
- if (rflg) {
- i = last;
- last = first;
- first = i;
- }
- /*
- * XXX - this should not depend on the event numbers
- * always increasing. Add sequence numbers or offset
- * to the history element in next (diskbased) release.
- */
- direction = first < last ? H_PREV : H_NEXT;
- /*
- * If editing, grab a temp file.
- */
- if (editor) {
- int fd;
- INTOFF; /* easier */
- sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
- if ((fd = mkstemp(editfilestr)) < 0)
- error("can't create temporary file %s", editfile);
- editfile = editfilestr;
- if ((efp = fdopen(fd, "w")) == NULL) {
- close(fd);
- error("Out of space");
- }
- }
- /*
- * Loop through selected history events. If listing or executing,
- * do it now. Otherwise, put into temp file and call the editor
- * after.
- *
- * The history interface needs rethinking, as the following
- * convolutions will demonstrate.
- */
- history(hist, &he, H_FIRST);
- retval = history(hist, &he, H_NEXT_EVENT, first);
- for (;retval != -1; retval = history(hist, &he, direction)) {
- if (lflg) {
- if (!nflg)
- out1fmt("%5d ", he.num);
- out1str(he.str);
- } else {
- char *s = pat ?
- fc_replace(he.str, pat, repl) : (char *)he.str;
- if (sflg) {
- if (displayhist) {
- out2str(s);
- flushout(out2);
- }
- evalstring(s, 0);
- if (displayhist && hist) {
- /*
- * XXX what about recursive and
- * relative histnums.
- */
- oldhistnum = he.num;
- history(hist, &he, H_ENTER, s);
- /*
- * XXX H_ENTER moves the internal
- * cursor, set it back to the current
- * entry.
- */
- retval = history(hist, &he,
- H_NEXT_EVENT, oldhistnum);
- }
- } else
- fputs(s, efp);
- }
- /*
- * At end? (if we were to lose last, we'd sure be
- * messed up).
- */
- if (he.num == last)
- break;
- }
- if (editor) {
- char *editcmd;
- fclose(efp);
- editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
- sprintf(editcmd, "%s %s", editor, editfile);
- evalstring(editcmd, 0); /* XXX - should use no JC command */
- INTON;
- readcmdfile(editfile); /* XXX - should read back - quick tst */
- unlink(editfile);
- }
- if (lflg == 0 && active > 0)
- --active;
- if (displayhist)
- displayhist = 0;
- handler = savehandler;
- return 0;
- }
- static char *
- fc_replace(const char *s, char *p, char *r)
- {
- char *dest;
- int plen = strlen(p);
- STARTSTACKSTR(dest);
- while (*s) {
- if (*s == *p && strncmp(s, p, plen) == 0) {
- STPUTS(r, dest);
- s += plen;
- *p = '\0'; /* so no more matches */
- } else
- STPUTC(*s++, dest);
- }
- STPUTC('\0', dest);
- dest = grabstackstr(dest);
- return (dest);
- }
- static int
- not_fcnumber(const char *s)
- {
- if (s == NULL)
- return (0);
- if (*s == '-')
- s++;
- return (!is_number(s));
- }
- static int
- str_to_event(const char *str, int last)
- {
- HistEvent he;
- const char *s = str;
- int relative = 0;
- int i, retval;
- retval = history(hist, &he, H_FIRST);
- switch (*s) {
- case '-':
- relative = 1;
- /*FALLTHROUGH*/
- case '+':
- s++;
- }
- if (is_number(s)) {
- i = atoi(s);
- if (relative) {
- while (retval != -1 && i--) {
- retval = history(hist, &he, H_NEXT);
- }
- if (retval == -1)
- retval = history(hist, &he, H_LAST);
- } else {
- retval = history(hist, &he, H_NEXT_EVENT, i);
- if (retval == -1) {
- /*
- * the notion of first and last is
- * backwards to that of the history package
- */
- retval = history(hist, &he, last ? H_FIRST : H_LAST);
- }
- }
- if (retval == -1)
- error("history number %s not found (internal error)",
- str);
- } else {
- /*
- * pattern
- */
- retval = history(hist, &he, H_PREV_STR, str);
- if (retval == -1)
- error("history pattern not found: %s", str);
- }
- return (he.num);
- }
- int
- bindcmd(int argc, char **argv)
- {
- if (el == NULL)
- error("line editing is disabled");
- return (el_parse(el, argc, (const char **)argv));
- }
- #else
- #include "error.h"
- int
- histcmd(int argc, char **argv)
- {
- error("not compiled with history support");
- /*NOTREACHED*/
- return (0);
- }
- int
- bindcmd(int argc, char **argv)
- {
- error("not compiled with line editing support");
- return (0);
- }
- #endif