462 lines
9.8 KiB
C
462 lines
9.8 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.
|
|
*
|
|
* 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
|
|
#if 0
|
|
static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$Id: miscbltin.c,v 1.16 1998/08/24 10:20:36 cracauer Exp $";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* Miscelaneous builtins.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <unistd.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <termios.h>
|
|
|
|
#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 __unused;
|
|
char **argv __unused;
|
|
{
|
|
char **ap;
|
|
int backslash;
|
|
char c;
|
|
int eflag;
|
|
char *prompt;
|
|
char *ifs;
|
|
char *p;
|
|
int startword;
|
|
int status;
|
|
int i;
|
|
struct timeval tv;
|
|
char *tvptr;
|
|
fd_set ifds;
|
|
struct termios told, tnew;
|
|
int tsaved;
|
|
|
|
eflag = 0;
|
|
prompt = NULL;
|
|
tv.tv_sec = -1;
|
|
tv.tv_usec = 0;
|
|
while ((i = nextopt("ep:t:")) != '\0') {
|
|
switch(i) {
|
|
case 'p':
|
|
prompt = optarg;
|
|
break;
|
|
case 'e':
|
|
eflag = 1;
|
|
break;
|
|
case 't':
|
|
tv.tv_sec = strtol(optarg, &tvptr, 0);
|
|
if (tvptr == optarg)
|
|
error("timeout value");
|
|
switch(*tvptr) {
|
|
case 0:
|
|
case 's':
|
|
break;
|
|
case 'h':
|
|
tv.tv_sec *= 60;
|
|
/* FALLTHROUGH */
|
|
case 'm':
|
|
tv.tv_sec *= 60;
|
|
break;
|
|
default:
|
|
error("timeout unit");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (prompt && isatty(0)) {
|
|
out2str(prompt);
|
|
flushall();
|
|
}
|
|
if (*(ap = argptr) == NULL)
|
|
error("arg count");
|
|
if ((ifs = bltinlookup("IFS", 1)) == NULL)
|
|
ifs = nullstr;
|
|
|
|
if (tv.tv_sec >= 0) {
|
|
/*
|
|
* See if we can disable input processing; this will
|
|
* not give the desired result if we are in a pipeline
|
|
* and someone upstream is still in line-by-line mode.
|
|
*/
|
|
tsaved = 0;
|
|
if (tcgetattr(0, &told) == 0) {
|
|
memcpy(&tnew, &told, sizeof(told));
|
|
cfmakeraw(&tnew);
|
|
tcsetattr(0, TCSANOW, &tnew);
|
|
tsaved = 1;
|
|
}
|
|
/*
|
|
* Wait for something to become available.
|
|
*/
|
|
FD_ZERO(&ifds);
|
|
FD_SET(0, &ifds);
|
|
status = select(1, &ifds, NULL, NULL, &tv);
|
|
if (tsaved)
|
|
tcsetattr(0, TCSANOW, &told);
|
|
/*
|
|
* If there's nothing ready, return an error.
|
|
*/
|
|
if (status <= 0)
|
|
return(1);
|
|
}
|
|
|
|
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 __unused;
|
|
char **argv;
|
|
{
|
|
char *ap;
|
|
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';
|
|
|
|
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);
|
|
}
|
|
} 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);
|
|
}
|
|
}
|
|
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;
|
|
const char *units;
|
|
int cmd;
|
|
int factor; /* multiply by to get rlim_{cur,max} values */
|
|
char option;
|
|
};
|
|
|
|
static const struct limits limits[] = {
|
|
#ifdef RLIMIT_CPU
|
|
{ "cpu time", "seconds", RLIMIT_CPU, 1, 't' },
|
|
#endif
|
|
#ifdef RLIMIT_FSIZE
|
|
{ "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' },
|
|
#endif
|
|
#ifdef RLIMIT_DATA
|
|
{ "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' },
|
|
#endif
|
|
#ifdef RLIMIT_STACK
|
|
{ "stack size", "kbytes", RLIMIT_STACK, 1024, 's' },
|
|
#endif
|
|
#ifdef RLIMIT_CORE
|
|
{ "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' },
|
|
#endif
|
|
#ifdef RLIMIT_RSS
|
|
{ "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' },
|
|
#endif
|
|
#ifdef RLIMIT_MEMLOCK
|
|
{ "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' },
|
|
#endif
|
|
#ifdef RLIMIT_NPROC
|
|
{ "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' },
|
|
#endif
|
|
#ifdef RLIMIT_NOFILE
|
|
{ "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' },
|
|
#endif
|
|
#ifdef RLIMIT_VMEM
|
|
{ "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' },
|
|
#endif
|
|
#ifdef RLIMIT_SWAP
|
|
{ "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' },
|
|
#endif
|
|
{ (char *) 0, (char *)0, 0, 0, '\0' }
|
|
};
|
|
|
|
int
|
|
ulimitcmd(argc, argv)
|
|
int argc __unused;
|
|
char **argv __unused;
|
|
{
|
|
int c;
|
|
quad_t val = 0;
|
|
enum { SOFT = 0x1, HARD = 0x2 }
|
|
how = SOFT | HARD;
|
|
const struct limits *l;
|
|
int set, all = 0;
|
|
int optc, what;
|
|
struct rlimit limit;
|
|
|
|
what = 'f';
|
|
while ((optc = nextopt("HSatfdsmcnul")) != '\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("ulimit: internal error (%c)", what);
|
|
|
|
set = *argptr ? 1 : 0;
|
|
if (set) {
|
|
char *p = *argptr;
|
|
|
|
if (all || argptr[1])
|
|
error("ulimit: too many arguments");
|
|
if (strcmp(p, "unlimited") == 0)
|
|
val = RLIM_INFINITY;
|
|
else {
|
|
val = (quad_t) 0;
|
|
|
|
while ((c = *p++) >= '0' && c <= '9')
|
|
{
|
|
val = (val * 10) + (long)(c - '0');
|
|
if (val < (quad_t) 0)
|
|
break;
|
|
}
|
|
if (c)
|
|
error("ulimit: bad number");
|
|
val *= l->factor;
|
|
}
|
|
}
|
|
if (all) {
|
|
for (l = limits; l->name; l++) {
|
|
char optbuf[40];
|
|
if (getrlimit(l->cmd, &limit) < 0)
|
|
error("ulimit: can't get limit: %s", strerror(errno));
|
|
if (how & SOFT)
|
|
val = limit.rlim_cur;
|
|
else if (how & HARD)
|
|
val = limit.rlim_max;
|
|
|
|
if (l->units)
|
|
snprintf(optbuf, sizeof(optbuf),
|
|
"(%s, -%c) ", l->units, l->option);
|
|
else
|
|
snprintf(optbuf, sizeof(optbuf),
|
|
"(-%c) ", l->option);
|
|
out1fmt("%-18s %18s ", l->name, optbuf);
|
|
if (val == RLIM_INFINITY)
|
|
out1fmt("unlimited\n");
|
|
else
|
|
{
|
|
val /= l->factor;
|
|
out1fmt("%qd\n", (quad_t) val);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (getrlimit(l->cmd, &limit) < 0)
|
|
error("ulimit: can't get limit: %s", strerror(errno));
|
|
if (set) {
|
|
if (how & SOFT)
|
|
limit.rlim_cur = val;
|
|
if (how & HARD)
|
|
limit.rlim_max = val;
|
|
if (setrlimit(l->cmd, &limit) < 0)
|
|
error("ulimit: bad limit: %s", strerror(errno));
|
|
} else {
|
|
if (how & SOFT)
|
|
val = limit.rlim_cur;
|
|
else if (how & HARD)
|
|
val = limit.rlim_max;
|
|
|
|
if (val == RLIM_INFINITY)
|
|
out1fmt("unlimited\n");
|
|
else
|
|
{
|
|
val /= l->factor;
|
|
out1fmt("%qd\n", (quad_t) val);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|