| 1 | /* $NetBSD: miscbltin.c,v 1.35 2005/03/19 14:22:50 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | */
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| 34 |
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| 35 | #if 0
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| 36 | #ifndef lint
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| 37 | static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
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| 38 | #else
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| 39 | __RCSID("$NetBSD: miscbltin.c,v 1.35 2005/03/19 14:22:50 dsl Exp $");
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| 40 | #endif /* not lint */
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| 41 | #endif
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| 42 |
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| 43 | /*
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| 44 | * Miscelaneous builtins.
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| 45 | */
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| 46 |
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| 47 | #include <sys/types.h>
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| 48 | #include <stdlib.h>
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| 49 | #include <ctype.h>
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| 50 | #include <errno.h>
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| 51 |
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| 52 | #include "shell.h"
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| 53 | #include "options.h"
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| 54 | #include "var.h"
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| 55 | #include "output.h"
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| 56 | #include "memalloc.h"
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| 57 | #include "error.h"
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| 58 | #include "miscbltin.h"
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| 59 | #include "mystring.h"
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| 60 | #include "shinstance.h"
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| 61 | #include "shfile.h"
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| 62 |
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| 63 | #undef rflag
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| 64 |
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| 65 | void *kash_setmode(shinstance *psh, const char *p);
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| 66 | mode_t kash_getmode(const void *bbox, mode_t omode);
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| 67 |
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| 68 |
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| 69 | /*
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| 70 | * The read builtin.
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| 71 | * Backslahes escape the next char unless -r is specified.
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| 72 | *
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| 73 | * This uses unbuffered input, which may be avoidable in some cases.
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| 74 | *
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| 75 | * Note that if IFS=' :' then read x y should work so that:
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| 76 | * 'a b' x='a', y='b'
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| 77 | * ' a b ' x='a', y='b'
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| 78 | * ':b' x='', y='b'
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| 79 | * ':' x='', y=''
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| 80 | * '::' x='', y=''
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| 81 | * ': :' x='', y=''
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| 82 | * ':::' x='', y='::'
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| 83 | * ':b c:' x='', y='b c:'
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| 84 | */
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| 85 |
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| 86 | int
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| 87 | readcmd(shinstance *psh, int argc, char **argv)
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| 88 | {
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| 89 | char **ap;
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| 90 | char c;
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| 91 | int rflag;
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| 92 | char *prompt;
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| 93 | const char *ifs;
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| 94 | char *p;
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| 95 | int startword;
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| 96 | int status;
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| 97 | int i;
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| 98 | int is_ifs;
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| 99 | int saveall = 0;
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| 100 |
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| 101 | rflag = 0;
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| 102 | prompt = NULL;
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| 103 | while ((i = nextopt(psh, "p:r")) != '\0') {
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| 104 | if (i == 'p')
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| 105 | prompt = psh->optionarg;
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| 106 | else
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| 107 | rflag = 1;
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| 108 | }
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| 109 |
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| 110 | if (prompt && shfile_isatty(&psh->fdtab, 0)) {
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| 111 | out2str(psh, prompt);
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| 112 | output_flushall(psh);
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| 113 | }
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| 114 |
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| 115 | if (*(ap = psh->argptr) == NULL)
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| 116 | error(psh, "arg count");
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| 117 |
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| 118 | if ((ifs = bltinlookup(psh, "IFS", 1)) == NULL)
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| 119 | ifs = " \t\n";
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| 120 |
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| 121 | status = 0;
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| 122 | startword = 2;
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| 123 | STARTSTACKSTR(psh, p);
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| 124 | for (;;) {
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| 125 | if (shfile_read(&psh->fdtab, 0, &c, 1) != 1) {
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| 126 | status = 1;
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| 127 | break;
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| 128 | }
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| 129 | if (c == '\0')
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| 130 | continue;
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| 131 | if (c == '\\' && !rflag) {
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| 132 | if (shfile_read(&psh->fdtab, 0, &c, 1) != 1) {
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| 133 | status = 1;
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| 134 | break;
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| 135 | }
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| 136 | if (c != '\n')
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| 137 | STPUTC(psh, c, p);
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| 138 | continue;
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| 139 | }
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| 140 | if (c == '\n')
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| 141 | break;
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| 142 | if (strchr(ifs, c))
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| 143 | is_ifs = strchr(" \t\n", c) ? 1 : 2;
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| 144 | else
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| 145 | is_ifs = 0;
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| 146 |
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| 147 | if (startword != 0) {
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| 148 | if (is_ifs == 1) {
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| 149 | /* Ignore leading IFS whitespace */
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| 150 | if (saveall)
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| 151 | STPUTC(psh, c, p);
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| 152 | continue;
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| 153 | }
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| 154 | if (is_ifs == 2 && startword == 1) {
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| 155 | /* Only one non-whitespace IFS per word */
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| 156 | startword = 2;
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| 157 | if (saveall)
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| 158 | STPUTC(psh, c, p);
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| 159 | continue;
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | if (is_ifs == 0) {
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| 164 | /* append this character to the current variable */
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| 165 | startword = 0;
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| 166 | if (saveall)
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| 167 | /* Not just a spare terminator */
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| 168 | saveall++;
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| 169 | STPUTC(psh, c, p);
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| 170 | continue;
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| 171 | }
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| 172 |
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| 173 | /* end of variable... */
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| 174 | startword = is_ifs;
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| 175 |
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| 176 | if (ap[1] == NULL) {
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| 177 | /* Last variable needs all IFS chars */
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| 178 | saveall++;
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| 179 | STPUTC(psh, c, p);
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| 180 | continue;
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| 181 | }
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| 182 |
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| 183 | STACKSTRNUL(psh, p);
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| 184 | setvar(psh, *ap, stackblock(psh), 0);
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| 185 | ap++;
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| 186 | STARTSTACKSTR(psh, p);
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| 187 | }
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| 188 | STACKSTRNUL(psh, p);
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| 189 |
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| 190 | /* Remove trailing IFS chars */
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| 191 | for (; stackblock(psh) <= --p; *p = 0) {
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| 192 | if (!strchr(ifs, *p))
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| 193 | break;
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| 194 | if (strchr(" \t\n", *p))
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| 195 | /* Always remove whitespace */
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| 196 | continue;
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| 197 | if (saveall > 1)
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| 198 | /* Don't remove non-whitespace unless it was naked */
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| 199 | break;
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| 200 | }
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| 201 | setvar(psh, *ap, stackblock(psh), 0);
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| 202 |
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| 203 | /* Set any remaining args to "" */
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| 204 | while (*++ap != NULL)
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| 205 | setvar(psh, *ap, nullstr, 0);
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| 206 | return status;
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| 207 | }
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| 208 |
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| 209 |
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| 210 |
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| 211 | int
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| 212 | umaskcmd(shinstance *psh, int argc, char **argv)
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| 213 | {
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| 214 | char *ap;
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| 215 | int mask;
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| 216 | int i;
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| 217 | int symbolic_mode = 0;
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| 218 |
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| 219 | while ((i = nextopt(psh, "S")) != '\0') {
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| 220 | symbolic_mode = 1;
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| 221 | }
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| 222 |
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| 223 | mask = shfile_get_umask(&psh->fdtab);
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| 224 |
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| 225 | if ((ap = *psh->argptr) == NULL) {
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| 226 | if (symbolic_mode) {
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| 227 | char u[4], g[4], o[4];
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| 228 |
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| 229 | i = 0;
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| 230 | if ((mask & S_IRUSR) == 0)
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| 231 | u[i++] = 'r';
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| 232 | if ((mask & S_IWUSR) == 0)
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| 233 | u[i++] = 'w';
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| 234 | if ((mask & S_IXUSR) == 0)
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| 235 | u[i++] = 'x';
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| 236 | u[i] = '\0';
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| 237 |
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| 238 | i = 0;
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| 239 | if ((mask & S_IRGRP) == 0)
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| 240 | g[i++] = 'r';
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| 241 | if ((mask & S_IWGRP) == 0)
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| 242 | g[i++] = 'w';
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| 243 | if ((mask & S_IXGRP) == 0)
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| 244 | g[i++] = 'x';
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| 245 | g[i] = '\0';
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| 246 |
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| 247 | i = 0;
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| 248 | if ((mask & S_IROTH) == 0)
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| 249 | o[i++] = 'r';
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| 250 | if ((mask & S_IWOTH) == 0)
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| 251 | o[i++] = 'w';
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| 252 | if ((mask & S_IXOTH) == 0)
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| 253 | o[i++] = 'x';
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| 254 | o[i] = '\0';
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| 255 |
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| 256 | out1fmt(psh, "u=%s,g=%s,o=%s\n", u, g, o);
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| 257 | } else {
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| 258 | out1fmt(psh, "%.4o\n", mask);
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| 259 | }
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| 260 | } else {
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| 261 | if (isdigit((unsigned char)*ap)) {
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| 262 | mask = 0;
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| 263 | do {
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| 264 | if (*ap >= '8' || *ap < '0')
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| 265 | error(psh, "Illegal number: %s", argv[1]);
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| 266 | mask = (mask << 3) + (*ap - '0');
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| 267 | } while (*++ap != '\0');
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| 268 | shfile_set_umask(&psh->fdtab, mask);
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| 269 | } else {
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| 270 | void *set;
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| 271 |
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| 272 | INTOFF;
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| 273 | if ((set = kash_setmode(psh, ap)) != 0) {
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| 274 | mask = kash_getmode(set, ~mask & 0777);
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| 275 | ckfree(psh, set);
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| 276 | }
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| 277 | INTON;
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| 278 | if (!set)
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| 279 | error(psh, "Illegal mode: %s", ap);
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| 280 |
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| 281 | shfile_set_umask(&psh->fdtab, ~mask & 0777);
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| 282 | }
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| 283 | }
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| 284 | return 0;
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| 285 | }
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| 286 |
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| 287 | /*
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| 288 | * ulimit builtin
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| 289 | *
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| 290 | * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
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| 291 | * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
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| 292 | * ash by J.T. Conklin.
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| 293 | *
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| 294 | * Public domain.
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| 295 | */
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| 296 |
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| 297 | struct limits {
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| 298 | const char *name;
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| 299 | int cmd;
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| 300 | int factor; /* multiply by to get rlim_{cur,max} values */
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| 301 | char option;
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| 302 | };
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| 303 |
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| 304 | static const struct limits limits[] = {
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| 305 | #ifdef RLIMIT_CPU
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| 306 | { "time(seconds)", RLIMIT_CPU, 1, 't' },
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| 307 | #endif
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| 308 | #ifdef RLIMIT_FSIZE
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| 309 | { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
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| 310 | #endif
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| 311 | #ifdef RLIMIT_DATA
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| 312 | { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
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| 313 | #endif
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| 314 | #ifdef RLIMIT_STACK
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| 315 | { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
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| 316 | #endif
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| 317 | #ifdef RLIMIT_CORE
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| 318 | { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
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| 319 | #endif
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| 320 | #ifdef RLIMIT_RSS
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| 321 | { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
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| 322 | #endif
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| 323 | #ifdef RLIMIT_MEMLOCK
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| 324 | { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
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| 325 | #endif
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| 326 | #ifdef RLIMIT_NPROC
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| 327 | { "process(processes)", RLIMIT_NPROC, 1, 'p' },
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| 328 | #endif
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| 329 | #ifdef RLIMIT_NOFILE
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| 330 | { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
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| 331 | #endif
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| 332 | #ifdef RLIMIT_VMEM
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| 333 | { "vmemory(kbytes)", RLIMIT_VMEM, 1024, 'v' },
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| 334 | #endif
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| 335 | #ifdef RLIMIT_SWAP
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| 336 | { "swap(kbytes)", RLIMIT_SWAP, 1024, 'w' },
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| 337 | #endif
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| 338 | #ifdef RLIMIT_SBSIZE
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| 339 | { "sbsize(bytes)", RLIMIT_SBSIZE, 1, 'b' },
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| 340 | #endif
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| 341 | { (char *) 0, 0, 0, '\0' }
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| 342 | };
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| 343 |
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| 344 | int
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| 345 | ulimitcmd(shinstance *psh, int argc, char **argv)
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| 346 | {
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| 347 | int c;
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| 348 | shrlim_t val = 0;
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| 349 | enum { SOFT = 0x1, HARD = 0x2 }
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| 350 | how = SOFT | HARD;
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| 351 | const struct limits *l;
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| 352 | int set, all = 0;
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| 353 | int optc, what;
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| 354 | shrlimit limit;
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| 355 |
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| 356 | what = 'f';
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| 357 | while ((optc = nextopt(psh, "HSabtfdsmcnpl")) != '\0')
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| 358 | switch (optc) {
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| 359 | case 'H':
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| 360 | how = HARD;
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| 361 | break;
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| 362 | case 'S':
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| 363 | how = SOFT;
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| 364 | break;
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| 365 | case 'a':
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| 366 | all = 1;
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| 367 | break;
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| 368 | default:
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| 369 | what = optc;
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| 370 | }
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| 371 |
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| 372 | for (l = limits; l->name && l->option != what; l++)
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| 373 | ;
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| 374 | if (!l->name)
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| 375 | error(psh, "internal error (%c)", what);
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| 376 |
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| 377 | set = *psh->argptr ? 1 : 0;
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| 378 | if (set) {
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| 379 | char *p = *psh->argptr;
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| 380 |
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| 381 | if (all || psh->argptr[1])
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| 382 | error(psh, "too many arguments");
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| 383 | if (strcmp(p, "unlimited") == 0)
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| 384 | val = RLIM_INFINITY;
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| 385 | else {
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| 386 | val = (shrlim_t) 0;
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| 387 |
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| 388 | while ((c = *p++) >= '0' && c <= '9')
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| 389 | {
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| 390 | val = (val * 10) + (long)(c - '0');
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| 391 | if (val < (shrlim_t) 0)
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| 392 | break;
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| 393 | }
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| 394 | if (c)
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| 395 | error(psh, "bad number");
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| 396 | val *= l->factor;
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| 397 | }
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| 398 | }
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| 399 | if (all) {
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| 400 | for (l = limits; l->name; l++) {
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| 401 | sh_getrlimit(psh, l->cmd, &limit);
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| 402 | if (how & SOFT)
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| 403 | val = limit.rlim_cur;
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| 404 | else if (how & HARD)
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| 405 | val = limit.rlim_max;
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| 406 |
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| 407 | out1fmt(psh, "%-20s ", l->name);
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| 408 | if (val == RLIM_INFINITY)
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| 409 | out1fmt(psh, "unlimited\n");
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| 410 | else
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| 411 | {
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| 412 | val /= l->factor;
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| 413 | out1fmt(psh, "%lld\n", (long long) val);
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| 414 | }
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| 415 | }
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| 416 | return 0;
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| 417 | }
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| 418 |
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| 419 | sh_getrlimit(psh, l->cmd, &limit);
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| 420 | if (set) {
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| 421 | if (how & HARD)
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| 422 | limit.rlim_max = val;
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| 423 | if (how & SOFT)
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| 424 | limit.rlim_cur = val;
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| 425 | if (sh_setrlimit(psh, l->cmd, &limit) < 0)
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|---|
| 426 | error(psh, "error setting limit (%s)", sh_strerror(psh, errno));
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|---|
| 427 | } else {
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|---|
| 428 | if (how & SOFT)
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|---|
| 429 | val = limit.rlim_cur;
|
|---|
| 430 | else if (how & HARD)
|
|---|
| 431 | val = limit.rlim_max;
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|---|
| 432 |
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|---|
| 433 | if (val == RLIM_INFINITY)
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|---|
| 434 | out1fmt(psh, "unlimited\n");
|
|---|
| 435 | else
|
|---|
| 436 | {
|
|---|
| 437 | val /= l->factor;
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|---|
| 438 | out1fmt(psh, "%lld\n", (long long) val);
|
|---|
| 439 | }
|
|---|
| 440 | }
|
|---|
| 441 | return 0;
|
|---|
| 442 | }
|
|---|
