mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 18:56:38 +00:00
109 lines
3 KiB
C
109 lines
3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2012 Jeremie Le Hen <jlh@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#define LIBSTDBUF "/usr/lib/libstdbuf.so"
|
|
#define LIBSTDBUF32 "/usr/lib32/libstdbuf.so"
|
|
|
|
static int
|
|
appendenv(const char *key, const char *value)
|
|
{
|
|
char *curval, *newpair;
|
|
int ret;
|
|
|
|
curval = getenv(key);
|
|
if (curval == NULL)
|
|
ret = asprintf(&newpair, "%s=%s", key, value);
|
|
else
|
|
ret = asprintf(&newpair, "%s=%s:%s", key, curval, value);
|
|
if (ret > 0)
|
|
ret = putenv(newpair);
|
|
if (ret < 0)
|
|
warn("Failed to set environment variable: %s", key);
|
|
return (ret);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr,
|
|
"usage: stdbuf [-e 0|L|B|<sz>] [-i 0|L|B|<sz>] [-o 0|L|B|<sz>] "
|
|
"<cmd> [args ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *ibuf, *obuf, *ebuf;
|
|
int i;
|
|
|
|
ibuf = obuf = ebuf = NULL;
|
|
while ((i = getopt(argc, argv, "e:i:o:")) != -1) {
|
|
switch (i) {
|
|
case 'e':
|
|
ebuf = optarg;
|
|
break;
|
|
case 'i':
|
|
ibuf = optarg;
|
|
break;
|
|
case 'o':
|
|
obuf = optarg;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc == 0)
|
|
exit(0);
|
|
|
|
if (ibuf != NULL && setenv("_STDBUF_I", ibuf, 1) == -1)
|
|
warn("Failed to set environment variable: %s=%s",
|
|
"_STDBUF_I", ibuf);
|
|
if (obuf != NULL && setenv("_STDBUF_O", obuf, 1) == -1)
|
|
warn("Failed to set environment variable: %s=%s",
|
|
"_STDBUF_O", obuf);
|
|
if (ebuf != NULL && setenv("_STDBUF_E", ebuf, 1) == -1)
|
|
warn("Failed to set environment variable: %s=%s",
|
|
"_STDBUF_E", ebuf);
|
|
|
|
appendenv("LD_PRELOAD", LIBSTDBUF);
|
|
appendenv("LD_32_PRELOAD", LIBSTDBUF32);
|
|
|
|
execvp(argv[0], argv);
|
|
err(2, "%s", argv[0]);
|
|
}
|