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3d2d04b25e
This lets our system() and popen() commands function sort of like BusyBox and ToyBox. By default the Cosmopolitan Shell is lightweight. But if you use STATIC_YOINK then you can pull the individual commands you want into the linkage, and they'll be included in a single binary. For example the demo binary embeds `tr` and `sed` and ends up ~140kb.
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/* $NetBSD: misc.c,v 1.15 2014/06/26 02:14:32 christos Exp $ */
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/*-
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* Copyright (c) 1992 Diomidis Spinellis.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Diomidis Spinellis of Imperial College, University of London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "libc/log/bsd.h"
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#include "libc/mem/mem.h"
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#include "third_party/sed/extern.h"
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// clang-format off
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/*
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* malloc with result test
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*/
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void *
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xmalloc(size_t size)
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{
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void *p;
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if ((p = malloc(size)) == NULL)
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err(1, "malloc(%zu)", size);
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return p;
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}
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/*
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* realloc with result test
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*/
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void *
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xrealloc(void *p, size_t size)
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{
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if (p == NULL) /* Compatibility hack. */
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return (xmalloc(size));
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if ((p = realloc(p, size)) == NULL)
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err(1, "realloc(%zu)", size);
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return p;
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}
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/*
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* realloc with result test
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*/
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void *
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xcalloc(size_t c, size_t n)
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{
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void *p;
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if ((p = calloc(c, n)) == NULL)
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err(1, "calloc(%zu, %zu)", c, n);
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return p;
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}
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/*
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* Return a string for a regular expression error passed. This is overkill,
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* because of the silly semantics of regerror (we can never know the size of
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* the buffer).
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*/
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char *
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strregerror(int errcode, regex_t *preg)
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{
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char buf[1];
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static char *oe;
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size_t s;
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if (oe != NULL)
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free(oe);
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s = regerror(errcode, preg, buf, 0);
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oe = xmalloc(s);
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(void)regerror(errcode, preg, oe, s);
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return (oe);
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}
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