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+/* $NetBSD: miscbltin.c,v 1.35 2005/03/19 14:22:50 dsl Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
+#else
+__RCSID("$NetBSD: miscbltin.c,v 1.35 2005/03/19 14:22:50 dsl Exp $");
+#endif /* not lint */
+#endif
+
+/*
+ * Miscelaneous builtins.
+ */
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "shell.h"
+#include "options.h"
+#include "var.h"
+#include "output.h"
+#include "memalloc.h"
+#include "error.h"
+#include "miscbltin.h"
+#include "mystring.h"
+#include "shinstance.h"
+#include "shfile.h"
+
+#undef rflag
+
+void *kash_setmode(shinstance *psh, const char *p);
+mode_t kash_getmode(const void *bbox, mode_t omode);
+
+
+/*
+ * The read builtin.
+ * Backslahes escape the next char unless -r is specified.
+ *
+ * This uses unbuffered input, which may be avoidable in some cases.
+ *
+ * Note that if IFS=' :' then read x y should work so that:
+ * 'a b' x='a', y='b'
+ * ' a b ' x='a', y='b'
+ * ':b' x='', y='b'
+ * ':' x='', y=''
+ * '::' x='', y=''
+ * ': :' x='', y=''
+ * ':::' x='', y='::'
+ * ':b c:' x='', y='b c:'
+ */
+
+int
+readcmd(shinstance *psh, int argc, char **argv)
+{
+ char **ap;
+ char c;
+ int rflag;
+ char *prompt;
+ const char *ifs;
+ char *p;
+ int startword;
+ int status;
+ int i;
+ int is_ifs;
+ int saveall = 0;
+
+ rflag = 0;
+ prompt = NULL;
+ while ((i = nextopt(psh, "p:r")) != '\0') {
+ if (i == 'p')
+ prompt = psh->optionarg;
+ else
+ rflag = 1;
+ }
+
+ if (prompt && shfile_isatty(&psh->fdtab, 0)) {
+ out2str(psh, prompt);
+ output_flushall(psh);
+ }
+
+ if (*(ap = psh->argptr) == NULL)
+ error(psh, "arg count");
+
+ if ((ifs = bltinlookup(psh, "IFS", 1)) == NULL)
+ ifs = " \t\n";
+
+ status = 0;
+ startword = 2;
+ STARTSTACKSTR(psh, p);
+ for (;;) {
+ if (shfile_read(&psh->fdtab, 0, &c, 1) != 1) {
+ status = 1;
+ break;
+ }
+ if (c == '\0')
+ continue;
+ if (c == '\\' && !rflag) {
+ if (shfile_read(&psh->fdtab, 0, &c, 1) != 1) {
+ status = 1;
+ break;
+ }
+ if (c != '\n')
+ STPUTC(psh, c, p);
+ continue;
+ }
+ if (c == '\n')
+ break;
+ if (strchr(ifs, c))
+ is_ifs = strchr(" \t\n", c) ? 1 : 2;
+ else
+ is_ifs = 0;
+
+ if (startword != 0) {
+ if (is_ifs == 1) {
+ /* Ignore leading IFS whitespace */
+ if (saveall)
+ STPUTC(psh, c, p);
+ continue;
+ }
+ if (is_ifs == 2 && startword == 1) {
+ /* Only one non-whitespace IFS per word */
+ startword = 2;
+ if (saveall)
+ STPUTC(psh, c, p);
+ continue;
+ }
+ }
+
+ if (is_ifs == 0) {
+ /* append this character to the current variable */
+ startword = 0;
+ if (saveall)
+ /* Not just a spare terminator */
+ saveall++;
+ STPUTC(psh, c, p);
+ continue;
+ }
+
+ /* end of variable... */
+ startword = is_ifs;
+
+ if (ap[1] == NULL) {
+ /* Last variable needs all IFS chars */
+ saveall++;
+ STPUTC(psh, c, p);
+ continue;
+ }
+
+ STACKSTRNUL(psh, p);
+ setvar(psh, *ap, stackblock(psh), 0);
+ ap++;
+ STARTSTACKSTR(psh, p);
+ }
+ STACKSTRNUL(psh, p);
+
+ /* Remove trailing IFS chars */
+ for (; stackblock(psh) <= --p; *p = 0) {
+ if (!strchr(ifs, *p))
+ break;
+ if (strchr(" \t\n", *p))
+ /* Always remove whitespace */
+ continue;
+ if (saveall > 1)
+ /* Don't remove non-whitespace unless it was naked */
+ break;
+ }
+ setvar(psh, *ap, stackblock(psh), 0);
+
+ /* Set any remaining args to "" */
+ while (*++ap != NULL)
+ setvar(psh, *ap, nullstr, 0);
+ return status;
+}
+
+
+
+int
+umaskcmd(shinstance *psh, int argc, char **argv)
+{
+ char *ap;
+ int mask;
+ int i;
+ int symbolic_mode = 0;
+
+ while ((i = nextopt(psh, "S")) != '\0') {
+ symbolic_mode = 1;
+ }
+
+ mask = shfile_get_umask(&psh->fdtab);
+
+ if ((ap = *psh->argptr) == NULL) {
+ if (symbolic_mode) {
+ char u[4], g[4], o[4];
+
+ i = 0;
+ if ((mask & S_IRUSR) == 0)
+ u[i++] = 'r';
+ if ((mask & S_IWUSR) == 0)
+ u[i++] = 'w';
+ if ((mask & S_IXUSR) == 0)
+ u[i++] = 'x';
+ u[i] = '\0';
+
+ i = 0;
+ if ((mask & S_IRGRP) == 0)
+ g[i++] = 'r';
+ if ((mask & S_IWGRP) == 0)
+ g[i++] = 'w';
+ if ((mask & S_IXGRP) == 0)
+ g[i++] = 'x';
+ g[i] = '\0';
+
+ i = 0;
+ if ((mask & S_IROTH) == 0)
+ o[i++] = 'r';
+ if ((mask & S_IWOTH) == 0)
+ o[i++] = 'w';
+ if ((mask & S_IXOTH) == 0)
+ o[i++] = 'x';
+ o[i] = '\0';
+
+ out1fmt(psh, "u=%s,g=%s,o=%s\n", u, g, o);
+ } else {
+ out1fmt(psh, "%.4o\n", mask);
+ }
+ } else {
+ if (isdigit((unsigned char)*ap)) {
+ mask = 0;
+ do {
+ if (*ap >= '8' || *ap < '0')
+ error(psh, "Illegal number: %s", argv[1]);
+ mask = (mask << 3) + (*ap - '0');
+ } while (*++ap != '\0');
+ shfile_set_umask(&psh->fdtab, mask);
+ } else {
+ void *set;
+
+ INTOFF;
+ if ((set = kash_setmode(psh, ap)) != 0) {
+ mask = kash_getmode(set, ~mask & 0777);
+ ckfree(psh, set);
+ }
+ INTON;
+ if (!set)
+ error(psh, "Illegal mode: %s", ap);
+
+ shfile_set_umask(&psh->fdtab, ~mask & 0777);
+ }
+ }
+ return 0;
+}
+
+/*
+ * ulimit builtin
+ *
+ * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
+ * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
+ * ash by J.T. Conklin.
+ *
+ * Public domain.
+ */
+
+struct limits {
+ const char *name;
+ int cmd;
+ int factor; /* multiply by to get rlim_{cur,max} values */
+ char option;
+};
+
+static const struct limits limits[] = {
+#ifdef RLIMIT_CPU
+ { "time(seconds)", RLIMIT_CPU, 1, 't' },
+#endif
+#ifdef RLIMIT_FSIZE
+ { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
+#endif
+#ifdef RLIMIT_DATA
+ { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
+#endif
+#ifdef RLIMIT_STACK
+ { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
+#endif
+#ifdef RLIMIT_CORE
+ { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
+#endif
+#ifdef RLIMIT_RSS
+ { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
+#endif
+#ifdef RLIMIT_MEMLOCK
+ { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
+#endif
+#ifdef RLIMIT_NPROC
+ { "process(processes)", RLIMIT_NPROC, 1, 'p' },
+#endif
+#ifdef RLIMIT_NOFILE
+ { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
+#endif
+#ifdef RLIMIT_VMEM
+ { "vmemory(kbytes)", RLIMIT_VMEM, 1024, 'v' },
+#endif
+#ifdef RLIMIT_SWAP
+ { "swap(kbytes)", RLIMIT_SWAP, 1024, 'w' },
+#endif
+#ifdef RLIMIT_SBSIZE
+ { "sbsize(bytes)", RLIMIT_SBSIZE, 1, 'b' },
+#endif
+ { (char *) 0, 0, 0, '\0' }
+};
+
+int
+ulimitcmd(shinstance *psh, int argc, char **argv)
+{
+ int c;
+ shrlim_t val = 0;
+ enum { SOFT = 0x1, HARD = 0x2 }
+ how = SOFT | HARD;
+ const struct limits *l;
+ int set, all = 0;
+ int optc, what;
+ shrlimit limit;
+
+ what = 'f';
+ while ((optc = nextopt(psh, "HSabtfdsmcnpl")) != '\0')
+ switch (optc) {
+ case 'H':
+ how = HARD;
+ break;
+ case 'S':
+ how = SOFT;
+ break;
+ case 'a':
+ all = 1;
+ break;
+ default:
+ what = optc;
+ }
+
+ for (l = limits; l->name && l->option != what; l++)
+ ;
+ if (!l->name)
+ error(psh, "internal error (%c)", what);
+
+ set = *psh->argptr ? 1 : 0;
+ if (set) {
+ char *p = *psh->argptr;
+
+ if (all || psh->argptr[1])
+ error(psh, "too many arguments");
+ if (strcmp(p, "unlimited") == 0)
+ val = RLIM_INFINITY;
+ else {
+ val = (shrlim_t) 0;
+
+ while ((c = *p++) >= '0' && c <= '9')
+ {
+ shrlim_t const prev = val;
+ val = (val * 10) + (long)(c - '0');
+ if (val < prev)
+ break;
+ }
+ if (c)
+ error(psh, "bad number");
+ val *= l->factor;
+ }
+ }
+ if (all) {
+ for (l = limits; l->name; l++) {
+ sh_getrlimit(psh, l->cmd, &limit);
+ if (how & SOFT)
+ val = limit.rlim_cur;
+ else if (how & HARD)
+ val = limit.rlim_max;
+
+ out1fmt(psh, "%-20s ", l->name);
+ if (val == RLIM_INFINITY)
+ out1fmt(psh, "unlimited\n");
+ else
+ {
+ val /= l->factor;
+ out1fmt(psh, "%lld\n", (long long) val);
+ }
+ }
+ return 0;
+ }
+
+ sh_getrlimit(psh, l->cmd, &limit);
+ if (set) {
+ if (how & HARD)
+ limit.rlim_max = val;
+ if (how & SOFT)
+ limit.rlim_cur = val;
+ if (sh_setrlimit(psh, l->cmd, &limit) < 0)
+ error(psh, "error setting limit (%s)", sh_strerror(psh, errno));
+ } else {
+ if (how & SOFT)
+ val = limit.rlim_cur;
+ else if (how & HARD)
+ val = limit.rlim_max;
+
+ if (val == RLIM_INFINITY)
+ out1fmt(psh, "unlimited\n");
+ else
+ {
+ val /= l->factor;
+ out1fmt(psh, "%lld\n", (long long) val);
+ }
+ }
+ return 0;
+}
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