diff options
Diffstat (limited to 'bin/cash/histedit.c')
| -rw-r--r-- | bin/cash/histedit.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/bin/cash/histedit.c b/bin/cash/histedit.c new file mode 100644 index 00000000..a568ea05 --- /dev/null +++ b/bin/cash/histedit.c @@ -0,0 +1,502 @@ +/*- + * 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. + * 3. 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: releng/12.0/bin/sh/histedit.c 319635 2017-06-06 21:08:05Z jilles $"); + +#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 || !is_number(hs)) + histsize = 100; + else + histsize = atoi(hs); + 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 { + const char *s = pat ? + fc_replace(he.str, pat, repl) : 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. + */ + 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); + INTON; + editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); + sprintf(editcmd, "%s %s", editor, editfile); + evalstring(editcmd, 0); /* XXX - should use no JC command */ + 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, __DECONST(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 |