2 * Copyright (c) 2012 Jeremie Le Hen <jlh@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #define LIBSTDBUF "/usr/lib/libstdbuf.so"
35 #define LIBSTDBUF32 "/usr/lib32/libstdbuf.so"
37 extern char *__progname;
43 fprintf(stderr, "Usage: %s [-e 0|L|<sz>] [-i 0|L|<sz>] [-o 0|L|<sz>] "
44 "<cmd> [args ...]\n", __progname);
49 main(int argc, char *argv[])
51 char *ibuf, *obuf, *ebuf;
52 char *preload0, *preload1;
55 ibuf = obuf = ebuf = NULL;
56 while ((i = getopt(argc, argv, "e:i:o:")) != -1) {
78 if (ibuf != NULL && setenv("_STDBUF_I", ibuf, 1) == -1)
79 warn("Failed to set environment variable: %s=%s",
81 if (obuf != NULL && setenv("_STDBUF_O", obuf, 1) == -1)
82 warn("Failed to set environment variable: %s=%s",
84 if (ebuf != NULL && setenv("_STDBUF_E", ebuf, 1) == -1)
85 warn("Failed to set environment variable: %s=%s",
88 preload0 = getenv("LD_PRELOAD");
90 i = asprintf(&preload1, "LD_PRELOAD=" LIBSTDBUF);
92 i = asprintf(&preload1, "LD_PRELOAD=%s:%s", preload0,
95 if (i < 0 || putenv(preload1) == -1)
96 warn("Failed to set environment variable: LD_PRELOAD");
98 preload0 = getenv("LD_32_PRELOAD");
100 i = asprintf(&preload1, "LD_32_PRELOAD=" LIBSTDBUF32);
102 i = asprintf(&preload1, "LD_32_PRELOAD=%s:%s", preload0,
105 if (i < 0 || putenv(preload1) == -1)
106 warn("Failed to set environment variable: LD_32_PRELOAD");
108 execvp(argv[0], argv);
109 err(2, "%s", argv[0]);