NetBSD/bin/sh/miscbltin.c

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/*-
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* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
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*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
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/*static char sccsid[] = "from: @(#)miscbltin.c 8.2 (Berkeley) 4/16/94";*/
static char *rcsid = "$Id: miscbltin.c,v 1.12 1994/12/05 19:07:45 cgd Exp $";
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#endif /* not lint */
/*
* Miscelaneous builtins.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>
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#include "shell.h"
#include "options.h"
#include "var.h"
#include "output.h"
#include "memalloc.h"
#include "error.h"
#include "mystring.h"
#undef eflag
extern char **argptr; /* argument list for builtin command */
/*
* The read builtin. The -e option causes backslashes to escape the
* following character.
*
* This uses unbuffered input, which may be avoidable in some cases.
*/
int
readcmd(argc, argv)
int argc;
char **argv;
{
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char **ap;
int backslash;
char c;
int eflag;
char *prompt;
char *ifs;
char *p;
int startword;
int status;
int i;
eflag = 0;
prompt = NULL;
while ((i = nextopt("ep:")) != '\0') {
if (i == 'p')
prompt = optarg;
else
eflag = 1;
}
if (prompt && isatty(0)) {
out2str(prompt);
flushall();
}
if (*(ap = argptr) == NULL)
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error("arg count");
if ((ifs = bltinlookup("IFS", 1)) == NULL)
ifs = nullstr;
status = 0;
startword = 1;
backslash = 0;
STARTSTACKSTR(p);
for (;;) {
if (read(0, &c, 1) != 1) {
status = 1;
break;
}
if (c == '\0')
continue;
if (backslash) {
backslash = 0;
if (c != '\n')
STPUTC(c, p);
continue;
}
if (eflag && c == '\\') {
backslash++;
continue;
}
if (c == '\n')
break;
if (startword && *ifs == ' ' && strchr(ifs, c)) {
continue;
}
startword = 0;
if (backslash && c == '\\') {
if (read(0, &c, 1) != 1) {
status = 1;
break;
}
STPUTC(c, p);
} else if (ap[1] != NULL && strchr(ifs, c) != NULL) {
STACKSTRNUL(p);
setvar(*ap, stackblock(), 0);
ap++;
startword = 1;
STARTSTACKSTR(p);
} else {
STPUTC(c, p);
}
}
STACKSTRNUL(p);
setvar(*ap, stackblock(), 0);
while (*++ap != NULL)
setvar(*ap, nullstr, 0);
return status;
}
int
umaskcmd(argc, argv)
int argc;
char **argv;
{
char *ap;
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int mask;
int i;
int symbolic_mode = 0;
while ((i = nextopt("S")) != '\0') {
symbolic_mode = 1;
}
INTOFF;
mask = umask(0);
umask(mask);
INTON;
if ((ap = *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';
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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("u=%s,g=%s,o=%s\n", u, g, o);
} else {
out1fmt("%.4o\n", mask);
}
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} else {
if (isdigit(*ap)) {
mask = 0;
do {
if (*ap >= '8' || *ap < '0')
error("Illegal number: %s", argv[1]);
mask = (mask << 3) + (*ap - '0');
} while (*++ap != '\0');
umask(mask);
} else {
void *set;
if ((set = setmode (ap)) == 0)
error("Illegal number: %s", ap);
mask = getmode (set, ~mask & 0777);
umask(~mask & 0777);
}
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}
return 0;
}