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111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*-
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* Copyright (c) 2012 Jeremie Le Hen <jlh@FreeBSD.org>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define LIBSTDBUF "/usr/lib/libstdbuf.so"
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#define LIBSTDBUF32 "/usr/lib32/libstdbuf.so"
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extern char *__progname;
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static void
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usage(int s)
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{
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fprintf(stderr, "Usage: %s [-e 0|L|<sz>] [-i 0|L|<sz>] [-o 0|L|<sz>] "
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"<cmd> [args ...]\n", __progname);
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exit(s);
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}
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int
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main(int argc, char *argv[])
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{
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char *ibuf, *obuf, *ebuf;
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char *preload0, *preload1;
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int i;
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ibuf = obuf = ebuf = NULL;
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while ((i = getopt(argc, argv, "e:i:o:")) != -1) {
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switch (i) {
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case 'e':
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ebuf = optarg;
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break;
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case 'i':
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ibuf = optarg;
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break;
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case 'o':
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obuf = optarg;
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break;
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case '?':
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default:
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usage(1);
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0)
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exit(0);
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if (ibuf != NULL && setenv("_STDBUF_I", ibuf, 1) == -1)
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warn("Failed to set environment variable: %s=%s",
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"_STDBUF_I", ibuf);
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if (obuf != NULL && setenv("_STDBUF_O", obuf, 1) == -1)
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warn("Failed to set environment variable: %s=%s",
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"_STDBUF_O", obuf);
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if (ebuf != NULL && setenv("_STDBUF_E", ebuf, 1) == -1)
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warn("Failed to set environment variable: %s=%s",
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"_STDBUF_E", ebuf);
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preload0 = getenv("LD_PRELOAD");
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if (preload0 == NULL)
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i = asprintf(&preload1, "LD_PRELOAD=" LIBSTDBUF);
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else
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i = asprintf(&preload1, "LD_PRELOAD=%s:%s", preload0,
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LIBSTDBUF);
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if (i < 0 || putenv(preload1) == -1)
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warn("Failed to set environment variable: LD_PRELOAD");
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preload0 = getenv("LD_32_PRELOAD");
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if (preload0 == NULL)
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i = asprintf(&preload1, "LD_32_PRELOAD=" LIBSTDBUF32);
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else
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i = asprintf(&preload1, "LD_32_PRELOAD=%s:%s", preload0,
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LIBSTDBUF32);
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if (i < 0 || putenv(preload1) == -1)
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warn("Failed to set environment variable: LD_32_PRELOAD");
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execvp(argv[0], argv);
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err(2, "%s", argv[0]);
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}
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