| 1 | /* $NetBSD: miscbltin.c,v 1.29 2001/01/04 15:39:51 lukem 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. All advertising materials mentioning features or use of this software
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| 19 | * must display the following acknowledgement:
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| 20 | * This product includes software developed by the University of
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| 21 | * California, Berkeley and its contributors.
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| 22 | * 4. Neither the name of the University nor the names of its contributors
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| 23 | * may be used to endorse or promote products derived from this software
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| 24 | * without specific prior written permission.
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| 25 | *
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 36 | * SUCH DAMAGE.
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| 37 | */
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| 38 |
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| 39 | #include <sys/cdefs.h>
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| 40 | #ifndef lint
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| 41 | #if 0
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| 42 | static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
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| 43 | #else
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| 44 | __RCSID("$NetBSD: miscbltin.c,v 1.29 2001/01/04 15:39:51 lukem Exp $");
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| 45 | #endif
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| 46 | #endif /* not lint */
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| 47 |
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| 48 | /*
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| 49 | * Miscelaneous builtins.
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| 50 | */
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| 51 |
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| 52 | #include <sys/types.h> /* quad_t */
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| 53 | #include <sys/param.h> /* BSD4_4 */
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| 54 | #include <sys/stat.h>
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| 55 | #include <sys/time.h>
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| 56 | #include <sys/resource.h>
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| 57 | #include <unistd.h>
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| 58 | #include <stdlib.h>
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| 59 | #include <ctype.h>
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| 60 | #include <errno.h>
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| 61 |
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| 62 | #include "shell.h"
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| 63 | #include "options.h"
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| 64 | #include "var.h"
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| 65 | #include "output.h"
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| 66 | #include "memalloc.h"
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| 67 | #include "error.h"
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| 68 | #include "miscbltin.h"
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| 69 | #include "mystring.h"
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| 70 |
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| 71 | #undef rflag
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| 72 |
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| 73 | #ifdef __GLIBC__
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| 74 | mode_t getmode(const void *, mode_t);
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| 75 | void *setmode(const char *);
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| 76 |
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| 77 | #if !defined(__GLIBC__) || __GLIBC__ == 2 && __GLIBC_MINOR__ < 1
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| 78 | typedef enum __rlimit_resource rlim_t;
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| 79 | #endif
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| 80 | #endif
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| 81 |
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| 82 | extern char **argptr; /* argument list for builtin command */
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| 83 |
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| 84 |
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| 85 | /*
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| 86 | * The read builtin. The -e option causes backslashes to escape the
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| 87 | * following character.
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| 88 | *
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| 89 | * This uses unbuffered input, which may be avoidable in some cases.
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| 90 | */
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| 91 |
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| 92 | int
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| 93 | readcmd(argc, argv)
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| 94 | int argc;
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| 95 | char **argv;
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| 96 | {
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| 97 | char **ap;
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| 98 | int backslash;
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| 99 | char c;
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| 100 | int rflag;
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| 101 | char *prompt;
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| 102 | char *ifs;
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| 103 | char *p;
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| 104 | int startword;
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| 105 | int status;
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| 106 | int i;
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| 107 |
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| 108 | rflag = 0;
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| 109 | prompt = NULL;
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| 110 | while ((i = nextopt("p:r")) != '\0') {
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| 111 | if (i == 'p')
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| 112 | prompt = optarg;
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| 113 | else
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| 114 | rflag = 1;
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| 115 | }
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| 116 | if (prompt && isatty(0)) {
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| 117 | out2str(prompt);
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| 118 | flushall();
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| 119 | }
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| 120 | if (*(ap = argptr) == NULL)
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| 121 | error("arg count");
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| 122 | if ((ifs = bltinlookup("IFS", 1)) == NULL)
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| 123 | ifs = nullstr;
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| 124 | status = 0;
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| 125 | startword = 1;
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| 126 | backslash = 0;
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| 127 | STARTSTACKSTR(p);
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| 128 | for (;;) {
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| 129 | if (read(0, &c, 1) != 1) {
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| 130 | status = 1;
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| 131 | break;
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| 132 | }
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| 133 | if (c == '\0')
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| 134 | continue;
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| 135 | if (backslash) {
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| 136 | backslash = 0;
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| 137 | if (c != '\n')
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| 138 | STPUTC(c, p);
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| 139 | continue;
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| 140 | }
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| 141 | if (!rflag && c == '\\') {
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| 142 | backslash++;
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| 143 | continue;
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| 144 | }
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| 145 | if (c == '\n')
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| 146 | break;
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| 147 | if (startword && *ifs == ' ' && strchr(ifs, c)) {
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| 148 | continue;
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| 149 | }
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| 150 | startword = 0;
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| 151 | if (backslash && c == '\\') {
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| 152 | if (read(0, &c, 1) != 1) {
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| 153 | status = 1;
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| 154 | break;
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| 155 | }
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| 156 | STPUTC(c, p);
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| 157 | } else if (ap[1] != NULL && strchr(ifs, c) != NULL) {
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| 158 | STACKSTRNUL(p);
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| 159 | setvar(*ap, stackblock(), 0);
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| 160 | ap++;
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| 161 | startword = 1;
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| 162 | STARTSTACKSTR(p);
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| 163 | } else {
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| 164 | STPUTC(c, p);
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| 165 | }
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| 166 | }
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| 167 | STACKSTRNUL(p);
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| 168 | /* Remove trailing blanks */
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| 169 | while (stackblock() <= --p && strchr(ifs, *p) != NULL)
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| 170 | *p = '\0';
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| 171 | setvar(*ap, stackblock(), 0);
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| 172 | while (*++ap != NULL)
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| 173 | setvar(*ap, nullstr, 0);
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| 174 | return status;
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| 175 | }
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| 176 |
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| 177 |
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| 178 |
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| 179 | int
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| 180 | umaskcmd(argc, argv)
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| 181 | int argc;
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| 182 | char **argv;
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| 183 | {
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| 184 | char *ap;
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| 185 | int mask;
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| 186 | int i;
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| 187 | int symbolic_mode = 0;
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| 188 |
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| 189 | while ((i = nextopt("S")) != '\0') {
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| 190 | symbolic_mode = 1;
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| 191 | }
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| 192 |
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| 193 | INTOFF;
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| 194 | mask = umask(0);
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| 195 | umask(mask);
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| 196 | INTON;
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| 197 |
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| 198 | if ((ap = *argptr) == NULL) {
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| 199 | if (symbolic_mode) {
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| 200 | char u[4], g[4], o[4];
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| 201 |
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| 202 | i = 0;
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| 203 | if ((mask & S_IRUSR) == 0)
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| 204 | u[i++] = 'r';
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| 205 | if ((mask & S_IWUSR) == 0)
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| 206 | u[i++] = 'w';
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| 207 | if ((mask & S_IXUSR) == 0)
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| 208 | u[i++] = 'x';
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| 209 | u[i] = '\0';
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| 210 |
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| 211 | i = 0;
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| 212 | if ((mask & S_IRGRP) == 0)
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| 213 | g[i++] = 'r';
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| 214 | if ((mask & S_IWGRP) == 0)
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| 215 | g[i++] = 'w';
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| 216 | if ((mask & S_IXGRP) == 0)
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| 217 | g[i++] = 'x';
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| 218 | g[i] = '\0';
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| 219 |
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| 220 | i = 0;
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| 221 | if ((mask & S_IROTH) == 0)
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| 222 | o[i++] = 'r';
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| 223 | if ((mask & S_IWOTH) == 0)
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| 224 | o[i++] = 'w';
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| 225 | if ((mask & S_IXOTH) == 0)
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| 226 | o[i++] = 'x';
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| 227 | o[i] = '\0';
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| 228 |
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| 229 | out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
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| 230 | } else {
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| 231 | out1fmt("%.4o\n", mask);
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| 232 | }
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| 233 | } else {
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| 234 | if (isdigit((unsigned char)*ap)) {
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| 235 | mask = 0;
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| 236 | do {
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| 237 | if (*ap >= '8' || *ap < '0')
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| 238 | error("Illegal number: %s", argv[1]);
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| 239 | mask = (mask << 3) + (*ap - '0');
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| 240 | } while (*++ap != '\0');
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| 241 | umask(mask);
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| 242 | } else {
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| 243 | void *set;
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| 244 |
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| 245 | INTOFF;
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| 246 | if ((set = setmode(ap)) != 0) {
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| 247 | mask = getmode(set, ~mask & 0777);
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| 248 | ckfree(set);
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| 249 | }
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| 250 | INTON;
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| 251 | if (!set)
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| 252 | error("Illegal mode: %s", ap);
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| 253 |
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| 254 | umask(~mask & 0777);
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| 255 | }
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| 256 | }
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| 257 | return 0;
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| 258 | }
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| 259 |
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| 260 | /*
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| 261 | * ulimit builtin
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| 262 | *
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| 263 | * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
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| 264 | * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
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| 265 | * ash by J.T. Conklin.
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| 266 | *
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| 267 | * Public domain.
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| 268 | */
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| 269 |
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| 270 | struct limits {
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| 271 | const char *name;
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| 272 | int cmd;
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| 273 | int factor; /* multiply by to get rlim_{cur,max} values */
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| 274 | char option;
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| 275 | };
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| 276 |
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| 277 | static const struct limits limits[] = {
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| 278 | #ifdef RLIMIT_CPU
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| 279 | { "time(seconds)", RLIMIT_CPU, 1, 't' },
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| 280 | #endif
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| 281 | #ifdef RLIMIT_FSIZE
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| 282 | { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
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| 283 | #endif
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| 284 | #ifdef RLIMIT_DATA
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| 285 | { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
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| 286 | #endif
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| 287 | #ifdef RLIMIT_STACK
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| 288 | { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
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| 289 | #endif
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| 290 | #ifdef RLIMIT_CORE
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| 291 | { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
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| 292 | #endif
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| 293 | #ifdef RLIMIT_RSS
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| 294 | { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
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| 295 | #endif
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| 296 | #ifdef RLIMIT_MEMLOCK
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| 297 | { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
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| 298 | #endif
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| 299 | #ifdef RLIMIT_NPROC
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| 300 | { "process(processes)", RLIMIT_NPROC, 1, 'p' },
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| 301 | #endif
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| 302 | #ifdef RLIMIT_NOFILE
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| 303 | { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
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| 304 | #endif
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| 305 | #ifdef RLIMIT_VMEM
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| 306 | { "vmemory(kbytes)", RLIMIT_VMEM, 1024, 'v' },
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| 307 | #endif
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| 308 | #ifdef RLIMIT_SWAP
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| 309 | { "swap(kbytes)", RLIMIT_SWAP, 1024, 'w' },
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| 310 | #endif
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| 311 | { (char *) 0, 0, 0, '\0' }
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| 312 | };
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| 313 |
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| 314 | int
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| 315 | ulimitcmd(argc, argv)
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| 316 | int argc;
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| 317 | char **argv;
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| 318 | {
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| 319 | int c;
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| 320 | rlim_t val = 0;
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| 321 | enum { SOFT = 0x1, HARD = 0x2 }
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| 322 | how = SOFT | HARD;
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| 323 | const struct limits *l;
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| 324 | int set, all = 0;
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| 325 | int optc, what;
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| 326 | struct rlimit limit;
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| 327 |
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| 328 | what = 'f';
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| 329 | while ((optc = nextopt("HSatfdsmcnpl")) != '\0')
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| 330 | switch (optc) {
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| 331 | case 'H':
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| 332 | how = HARD;
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| 333 | break;
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| 334 | case 'S':
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| 335 | how = SOFT;
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| 336 | break;
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| 337 | case 'a':
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| 338 | all = 1;
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| 339 | break;
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| 340 | default:
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| 341 | what = optc;
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| 342 | }
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| 343 |
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| 344 | for (l = limits; l->name && l->option != what; l++)
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| 345 | ;
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| 346 | if (!l->name)
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| 347 | error("internal error (%c)", what);
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| 348 |
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| 349 | set = *argptr ? 1 : 0;
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| 350 | if (set) {
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| 351 | char *p = *argptr;
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| 352 |
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| 353 | if (all || argptr[1])
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| 354 | error("too many arguments");
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| 355 | if (strcmp(p, "unlimited") == 0)
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| 356 | val = RLIM_INFINITY;
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| 357 | else {
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| 358 | val = (rlim_t) 0;
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| 359 |
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| 360 | while ((c = *p++) >= '0' && c <= '9')
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| 361 | {
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| 362 | val = (val * 10) + (long)(c - '0');
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| 363 | if (val < (rlim_t) 0)
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| 364 | break;
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| 365 | }
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| 366 | if (c)
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| 367 | error("bad number");
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| 368 | val *= l->factor;
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| 369 | }
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| 370 | }
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| 371 | if (all) {
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| 372 | for (l = limits; l->name; l++) {
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| 373 | getrlimit(l->cmd, &limit);
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| 374 | if (how & SOFT)
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| 375 | val = limit.rlim_cur;
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| 376 | else if (how & HARD)
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| 377 | val = limit.rlim_max;
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| 378 |
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| 379 | out1fmt("%-20s ", l->name);
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| 380 | if (val == RLIM_INFINITY)
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| 381 | out1fmt("unlimited\n");
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| 382 | else
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| 383 | {
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| 384 | val /= l->factor;
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| 385 | #ifdef BSD4_4
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| 386 | out1fmt("%lld\n", (long long) val);
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| 387 | #else
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| 388 | out1fmt("%ld\n", (long) val);
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| 389 | #endif
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| 390 | }
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| 391 | }
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| 392 | return 0;
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| 393 | }
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| 394 |
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| 395 | getrlimit(l->cmd, &limit);
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| 396 | if (set) {
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| 397 | if (how & HARD)
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| 398 | limit.rlim_max = val;
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| 399 | if (how & SOFT)
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| 400 | limit.rlim_cur = val;
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| 401 | if (setrlimit(l->cmd, &limit) < 0)
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| 402 | error("error setting limit (%s)", strerror(errno));
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| 403 | } else {
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| 404 | if (how & SOFT)
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| 405 | val = limit.rlim_cur;
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| 406 | else if (how & HARD)
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| 407 | val = limit.rlim_max;
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| 408 |
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| 409 | if (val == RLIM_INFINITY)
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| 410 | out1fmt("unlimited\n");
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| 411 | else
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| 412 | {
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| 413 | val /= l->factor;
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| 414 | #ifdef BSD4_4
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| 415 | out1fmt("%lld\n", (long long) val);
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| 416 | #else
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| 417 | out1fmt("%ld\n", (long) val);
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| 418 | #endif
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| 419 | }
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| 420 | }
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| 421 | return 0;
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| 422 | }
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