freebsd-dev/bin/sh/miscbltin.c
Joerg Wunsch 769bbc65e8 o rename ulimit -p into ulimit -u, so we are in agreement with bash
o fix brokeness for 1>&5 redirection, where `5' was an invalid file
  descriptor, but no error message has been generated

o fix brokeness for redirect to/from myself case
1995-10-21 00:47:32 +00:00

382 lines
8.8 KiB
C

/*-
* 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.
* The ulimit() builtin has been contributed by Joerg Wunsch.
*
* 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.
*
* $Id: miscbltin.c,v 1.3 1995/10/19 18:42:10 joerg Exp $
*/
#ifndef lint
static char sccsid[] = "@(#)miscbltin.c 8.2 (Berkeley) 4/16/94";
#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"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if BSD
#include <limits.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#endif
#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;
}
#if BSD
struct restab {
int resource;
int scale;
char *descript;
};
/* multi-purpose */
#define RLIMIT_UNSPEC (-2)
/* resource */
#define RLIMIT_ALL (-1)
/* mode */
#define RLIMIT_SHOW 0
#define RLIMIT_SET 1
/* what */
#define RLIMIT_SOFT 1
#define RLIMIT_HARD 2
static struct restab restab[] = {
{RLIMIT_CORE, 512, "coredump(512-blocks) "},
{RLIMIT_CPU, 1, "time(seconds) "},
{RLIMIT_DATA, 1024, "datasize(kilobytes) "},
{RLIMIT_FSIZE, 512, "filesize(512-blocks) "},
{RLIMIT_MEMLOCK, 1024, "lockedmem(kilobytes) "},
{RLIMIT_NOFILE, 1, "nofiles(descriptors) "},
{RLIMIT_NPROC, 1, "userprocs(max) "},
{RLIMIT_RSS, 1024, "memoryuse(kilobytes) "},
{RLIMIT_STACK, 1024, "stacksize(kilobytes) "}
};
/* get entry into above table */
static struct restab *
find_resource(resource) {
int i;
struct restab *rp;
for(i = 0, rp = restab;
i < sizeof restab / sizeof(struct restab);
i++, rp++)
if(rp->resource == resource)
return rp;
error("internal error: resource not in table");
return 0;
}
static void
print_resource(rp, what, with_descript) struct restab *rp; {
struct rlimit rlim;
quad_t val;
(void)getrlimit(rp->resource, &rlim);
val = (what == RLIMIT_SOFT)?
rlim.rlim_cur: rlim.rlim_max;
if(with_descript)
out1str(rp->descript);
if(val == RLIM_INFINITY)
out1str("unlimited\n");
else {
val /= (quad_t)rp->scale;
if(val > (quad_t)ULONG_MAX)
out1fmt("> %lu\n", (unsigned long)ULONG_MAX);
else
out1fmt("%lu\n", (unsigned long)val);
}
}
ulimitcmd(argc, argv) char **argv; {
struct rlimit rlim;
char *p;
int i;
int resource = RLIMIT_UNSPEC;
quad_t val;
int what = RLIMIT_UNSPEC;
int mode = RLIMIT_UNSPEC;
int errs = 0, arg = 1;
struct restab *rp;
extern int optreset; /* XXX should be declared in <stdlib.h> */
opterr = 0; /* use own error processing */
optreset = 1;
optind = 1;
while ((i = getopt(argc, argv, "HSacdfnstmlu")) != EOF) {
arg++;
switch(i) {
case 'H':
if(what == RLIMIT_UNSPEC) what = 0;
what |= RLIMIT_HARD;
break;
case 'S':
if(what == RLIMIT_UNSPEC) what = 0;
what |= RLIMIT_SOFT;
break;
case 'a':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_ALL;
mode = RLIMIT_SHOW;
break;
case 'c':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_CORE;
break;
case 'd':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_DATA;
break;
case 'f':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_FSIZE;
break;
case 'n':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_NOFILE;
break;
case 's':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_STACK;
break;
case 't':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_CPU;
break;
case 'm':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_RSS;
break;
case 'l':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_MEMLOCK;
break;
case 'u':
if(resource != RLIMIT_UNSPEC) errs++;
resource = RLIMIT_NPROC;
break;
case '?':
error("illegal option -%c", optopt);
}
}
argc -= optind;
argv += optind;
if(argc > 1)
error("too many arguments");
if(argc == 0)
mode = RLIMIT_SHOW;
else if (resource == RLIMIT_ALL)
errs++;
else
mode = RLIMIT_SET;
if(mode == RLIMIT_UNSPEC)
mode = RLIMIT_SHOW;
if(resource == RLIMIT_UNSPEC)
resource = RLIMIT_FSIZE;
if(what == RLIMIT_UNSPEC)
what = (mode == RLIMIT_SHOW)?
RLIMIT_SOFT: (RLIMIT_SOFT|RLIMIT_HARD);
if(mode == RLIMIT_SHOW && what == (RLIMIT_SOFT|RLIMIT_HARD))
errs++;
if(errs)
error("Wrong option combination");
if(resource == RLIMIT_ALL)
for(i = 0; i < sizeof restab / sizeof(struct restab); i++)
print_resource(restab + i, what, 1);
else if(mode == RLIMIT_SHOW)
print_resource(find_resource(resource), what, 0);
else {
rp = find_resource(resource);
if(strcmp(argv[0], "unlimited") == 0)
val = RLIM_INFINITY;
else {
val = 0;
p = argv[0];
do {
if((i = *p - '0') < 0 || i > 9)
error("Illegal number: %s", argv[0]);
val = (10 * val) + (quad_t)i;
} while (*++p != '\0');
val *= (quad_t)rp->scale;
}
(void)getrlimit(resource, &rlim);
if(what & RLIMIT_HARD)
rlim.rlim_max = val;
if(what & RLIMIT_SOFT)
rlim.rlim_cur = val;
if(setrlimit(resource, &rlim) == -1) {
outfmt(&errout, "ulimit: bad limit: %s\n",
strerror(errno));
return 1;
}
}
return 0;
}
#else /* !BSD */
#error ulimit() not implemented
#endif /* BSD */