minix/commands/ash/miscbltin.c
2005-04-21 14:53:53 +00:00

166 lines
4.1 KiB
C
Executable file

/*-
* Copyright (c) 1991 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. 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
static char sccsid[] = "@(#)miscbltin.c 5.2 (Berkeley) 3/13/91";
#endif /* not lint */
/*
* Miscelaneous builtins.
*/
#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.
*/
readcmd(argc, argv) char **argv; {
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)
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;
}
umaskcmd(argc, argv) char **argv; {
int mask;
char *p;
int i;
if ((p = argv[1]) == NULL) {
INTOFF;
mask = umask(0);
umask(mask);
INTON;
out1fmt("%.4o\n", mask); /* %#o might be better */
} else {
mask = 0;
do {
if ((unsigned)(i = *p - '0') >= 8)
error("Illegal number: %s", argv[1]);
mask = (mask << 3) + i;
} while (*++p != '\0');
umask(mask);
}
return 0;
}