252a83f614
Also did some cleanup in ash sources, to make minix modifications more obvious, as well as some simplifications (by removing code which is never compiled) Removed EDITLINE support, use libedit, which does the termcap/terminfo handling. Change-Id: I19f7f425ed6a61298844631f9d7f3173cf7f30c0
497 lines
10 KiB
C
497 lines
10 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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/*
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__FBSDID("$FreeBSD: src/bin/sh/miscbltin.c,v 1.30 2004/04/06 20:06:51 markm Exp $");
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*/
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/*
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* Miscellaneous builtins.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/select.h>
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#include <time.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include "shell.h"
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#include "options.h"
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#include "var.h"
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#include "output.h"
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#include "memalloc.h"
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#include "error.h"
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#include "mystring.h"
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#include "builtins.h"
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#undef eflag
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/*
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* The read builtin. The -r option causes backslashes to be treated like
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* ordinary characters.
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*
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* This uses unbuffered input, which may be avoidable in some cases.
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*/
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int
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readcmd(int argc __unused, char **argv __unused)
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{
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char **ap;
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int backslash;
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char c;
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int rflag;
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char *prompt;
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char *ifs;
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char *p;
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int startword;
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int status;
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int i;
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struct timeval tv;
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char *tvptr;
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#ifndef __minix
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fd_set ifds;
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struct termios told, tnew;
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int tsaved;
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#endif
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rflag = 0;
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prompt = NULL;
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tv.tv_sec = -1;
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tv.tv_usec = 0;
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while ((i = nextopt("erp:t:")) != '\0') {
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switch(i) {
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case 'p':
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prompt = shoptarg;
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break;
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case 'e':
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break;
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case 'r':
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rflag = 1;
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break;
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case 't':
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tv.tv_sec = strtol(shoptarg, &tvptr, 0);
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if (tvptr == shoptarg)
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error("timeout value");
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switch(*tvptr) {
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case 0:
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case 's':
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break;
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case 'h':
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tv.tv_sec *= 60;
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/* FALLTHROUGH */
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case 'm':
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tv.tv_sec *= 60;
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break;
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default:
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error("timeout unit");
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}
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break;
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}
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}
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if (prompt && isatty(0)) {
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out2str(prompt);
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flushall();
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}
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if (*(ap = argptr) == NULL)
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error("arg count");
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if ((ifs = bltinlookup("IFS", 1)) == NULL)
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ifs = nullstr;
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if (tv.tv_sec >= 0) {
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#ifdef __minix
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abort();
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#else
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/*
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* See if we can disable input processing; this will
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* not give the desired result if we are in a pipeline
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* and someone upstream is still in line-by-line mode.
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*/
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tsaved = 0;
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if (tcgetattr(0, &told) == 0) {
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memcpy(&tnew, &told, sizeof(told));
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cfmakeraw(&tnew);
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tcsetattr(0, TCSANOW, &tnew);
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tsaved = 1;
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}
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/*
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* Wait for something to become available.
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*/
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FD_ZERO(&ifds);
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FD_SET(0, &ifds);
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status = select(1, &ifds, NULL, NULL, &tv);
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if (tsaved)
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tcsetattr(0, TCSANOW, &told);
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/*
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* If there's nothing ready, return an error.
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*/
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if (status <= 0)
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return(1);
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#endif
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}
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status = 0;
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startword = 1;
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backslash = 0;
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STARTSTACKSTR(p);
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for (;;) {
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if (read(STDIN_FILENO, &c, 1) != 1) {
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status = 1;
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break;
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}
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if (c == '\0')
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continue;
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if (backslash) {
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backslash = 0;
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if (c != '\n')
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STPUTC(c, p);
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continue;
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}
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if (!rflag && c == '\\') {
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backslash++;
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continue;
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}
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if (c == '\n')
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break;
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if (startword && *ifs == ' ' && strchr(ifs, c)) {
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continue;
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}
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startword = 0;
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if (backslash && c == '\\') {
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if (read(STDIN_FILENO, &c, 1) != 1) {
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status = 1;
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break;
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}
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STPUTC(c, p);
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} else if (ap[1] != NULL && strchr(ifs, c) != NULL) {
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STACKSTRNUL(p);
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setvar(*ap, stackblock(), 0);
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ap++;
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startword = 1;
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STARTSTACKSTR(p);
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} else {
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STPUTC(c, p);
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}
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}
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STACKSTRNUL(p);
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setvar(*ap, stackblock(), 0);
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while (*++ap != NULL)
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setvar(*ap, nullstr, 0);
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return status;
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}
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int
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umaskcmd(int argc __unused, char **argv)
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{
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char *ap;
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int mask;
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int i;
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int symbolic_mode = 0;
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while ((i = nextopt("S")) != '\0') {
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symbolic_mode = 1;
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}
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INTOFF;
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mask = umask(0);
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umask(mask);
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INTON;
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if ((ap = *argptr) == NULL) {
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if (symbolic_mode) {
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char u[4], g[4], o[4];
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i = 0;
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if ((mask & S_IRUSR) == 0)
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u[i++] = 'r';
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if ((mask & S_IWUSR) == 0)
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u[i++] = 'w';
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if ((mask & S_IXUSR) == 0)
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u[i++] = 'x';
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u[i] = '\0';
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i = 0;
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if ((mask & S_IRGRP) == 0)
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g[i++] = 'r';
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if ((mask & S_IWGRP) == 0)
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g[i++] = 'w';
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if ((mask & S_IXGRP) == 0)
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g[i++] = 'x';
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g[i] = '\0';
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i = 0;
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if ((mask & S_IROTH) == 0)
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o[i++] = 'r';
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if ((mask & S_IWOTH) == 0)
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o[i++] = 'w';
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if ((mask & S_IXOTH) == 0)
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o[i++] = 'x';
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o[i] = '\0';
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out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
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} else {
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out1fmt("%.4o\n", mask);
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}
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} else {
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if (isdigit(*ap)) {
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mask = 0;
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do {
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if (*ap >= '8' || *ap < '0')
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error("Illegal number: %s", argv[1]);
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mask = (mask << 3) + (*ap - '0');
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} while (*++ap != '\0');
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umask(mask);
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} else {
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void *set;
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if ((set = setmode (ap)) == 0)
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error("Illegal number: %s", ap);
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mask = getmode (set, ~mask & 0777);
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umask(~mask & 0777);
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free(set);
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}
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}
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return 0;
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}
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#ifdef __minix
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struct rlimit
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{
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unsigned long rlim_cur; /* current (soft) limit */
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unsigned long rlim_max; /* maximum value for rlim_cur */
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};
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#define RLIM_INFINITY (((unsigned long)1 << 31) - 1)
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int getrlimit (int, struct rlimit *);
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int setrlimit (int, const struct rlimit *);
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int getrlimit(resource, rlp)
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int resource;
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struct rlimit *rlp;
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{
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errno= ENOSYS;
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return -1;
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}
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int setrlimit(resource, rlp)
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int resource;
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const struct rlimit *rlp;
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{
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errno= ENOSYS;
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return -1;
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}
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#endif
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/*
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* ulimit builtin
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*
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* This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
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* Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
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* ash by J.T. Conklin.
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*
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* Public domain.
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*/
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struct limits {
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const char *name;
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const char *units;
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int cmd;
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int factor; /* multiply by to get rlim_{cur,max} values */
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char option;
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};
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static const struct limits limits[] = {
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#ifdef RLIMIT_CPU
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{ "cpu time", "seconds", RLIMIT_CPU, 1, 't' },
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#endif
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#ifdef RLIMIT_FSIZE
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{ "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' },
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#endif
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#ifdef RLIMIT_DATA
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{ "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' },
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#endif
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#ifdef RLIMIT_STACK
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{ "stack size", "kbytes", RLIMIT_STACK, 1024, 's' },
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#endif
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#ifdef RLIMIT_CORE
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{ "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' },
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#endif
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#ifdef RLIMIT_RSS
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{ "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' },
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#endif
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#ifdef RLIMIT_MEMLOCK
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{ "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' },
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#endif
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#ifdef RLIMIT_NPROC
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{ "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' },
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#endif
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#ifdef RLIMIT_NOFILE
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{ "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' },
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#endif
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#ifdef RLIMIT_VMEM
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{ "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' },
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#endif
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#ifdef RLIMIT_SWAP
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{ "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' },
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#endif
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#ifdef RLIMIT_SBSIZE
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{ "sbsize", "bytes", RLIMIT_SBSIZE, 1, 'b' },
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#endif
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{ (char *) 0, (char *)0, 0, 0, '\0' }
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};
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int
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ulimitcmd(int argc __unused, char **argv __unused)
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{
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int c;
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intmax_t val = 0;
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enum { SOFT = 0x1, HARD = 0x2 }
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how = SOFT | HARD;
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const struct limits *l;
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int set, all = 0;
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int optc, what;
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struct rlimit limit;
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what = 'f';
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while ((optc = nextopt("HSatfdsmcnuvlb")) != '\0')
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switch (optc) {
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case 'H':
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how = HARD;
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break;
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case 'S':
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how = SOFT;
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break;
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case 'a':
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all = 1;
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break;
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default:
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what = optc;
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}
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for (l = limits; l->name && l->option != what; l++)
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;
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if (!l->name)
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error("internal error (%c)", what);
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set = *argptr ? 1 : 0;
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if (set) {
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char *p = *argptr;
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if (all || argptr[1])
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error("too many arguments");
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if (strcmp(p, "unlimited") == 0)
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val = RLIM_INFINITY;
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else {
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val = 0;
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while ((c = *p++) >= '0' && c <= '9')
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{
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val = (val * 10) + (long)(c - '0');
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if (val < 0)
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break;
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}
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if (c)
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error("bad number");
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val *= l->factor;
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}
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}
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if (all) {
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for (l = limits; l->name; l++) {
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char optbuf[40];
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if (getrlimit(l->cmd, &limit) < 0)
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error("can't get limit: %s", strerror(errno));
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if (how & SOFT)
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val = limit.rlim_cur;
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else if (how & HARD)
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val = limit.rlim_max;
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if (l->units)
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snprintf(optbuf, sizeof(optbuf),
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"(%s, -%c) ", l->units, l->option);
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else
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snprintf(optbuf, sizeof(optbuf),
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"(-%c) ", l->option);
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out1fmt("%-18s %18s ", l->name, optbuf);
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if (val == RLIM_INFINITY)
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out1fmt("unlimited\n");
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else
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{
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val /= l->factor;
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out1fmt("%jd\n", (intmax_t)val);
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}
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}
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return 0;
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}
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if (getrlimit(l->cmd, &limit) < 0)
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error("can't get limit: %s", strerror(errno));
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if (set) {
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if (how & SOFT)
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limit.rlim_cur = val;
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if (how & HARD)
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limit.rlim_max = val;
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if (setrlimit(l->cmd, &limit) < 0)
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error("bad limit: %s", strerror(errno));
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} else {
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if (how & SOFT)
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val = limit.rlim_cur;
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else if (how & HARD)
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val = limit.rlim_max;
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if (val == RLIM_INFINITY)
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out1fmt("unlimited\n");
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else
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{
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val /= l->factor;
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out1fmt("%jd\n", (intmax_t)val);
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}
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}
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return 0;
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}
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/*
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* $PchId: miscbltin.c,v 1.7 2006/05/23 11:59:08 philip Exp $
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*/
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