From e8f930035525b5bb7a66c4894ffc1d37e4250f7a Mon Sep 17 00:00:00 2001 From: Guillem Jover Date: Thu, 26 Jun 2014 21:32:11 +0200 Subject: [PATCH] Add getbsize() function Import code from DragonFlyBSD and man page from FreeBSD. --- include/bsd/stdlib.h | 2 + man/Makefile.am | 1 + man/getbsize.3 | 95 ++++++++++++++++++++++++++++++++++++++++ src/Makefile.am | 1 + src/getbsize.c | 102 +++++++++++++++++++++++++++++++++++++++++++ src/libbsd.map | 2 + 6 files changed, 203 insertions(+) create mode 100644 man/getbsize.3 create mode 100644 src/getbsize.c diff --git a/include/bsd/stdlib.h b/include/bsd/stdlib.h index dd30703..eb1f1c1 100644 --- a/include/bsd/stdlib.h +++ b/include/bsd/stdlib.h @@ -70,6 +70,8 @@ void *reallocf(void *ptr, size_t size); long long strtonum(const char *nptr, long long minval, long long maxval, const char **errstr); + +char *getbsize(int *headerlenp, long *blocksizep); __END_DECLS #endif diff --git a/man/Makefile.am b/man/Makefile.am index cbd71e4..e3b7e17 100644 --- a/man/Makefile.am +++ b/man/Makefile.am @@ -29,6 +29,7 @@ dist_man_MANS = \ fmtcheck.3 \ fparseln.3 \ funopen.3 \ + getbsize.3 \ getmode.3 \ getpeereid.3 \ getprogname.3 \ diff --git a/man/getbsize.3 b/man/getbsize.3 new file mode 100644 index 0000000..38ec41a --- /dev/null +++ b/man/getbsize.3 @@ -0,0 +1,95 @@ +.\" Copyright (c) 1993 +.\" The Regents of the University of California. 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. +.\" 3. 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. +.\" +.\" @(#)getbsize.3 8.1 (Berkeley) 6/4/93 +.\" $FreeBSD$ +.\" +.Dd November 16, 2012 +.Dt GETBSIZE 3 +.Os +.Sh NAME +.Nm getbsize +.Nd get preferred block size +.Sh LIBRARY +.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd) +.Lb libbsd +.Sh SYNOPSIS +.In bsd/stdlib.h +.Ft char * +.Fn getbsize "int *headerlenp" "long *blocksizep" +.Sh DESCRIPTION +The +.Fn getbsize +function returns a preferred block size for reporting by system utilities +.Xr df 1 , +.Xr du 1 , +.Xr ls 1 +and +.Xr systat 1 , +based on the value of the +.Ev BLOCKSIZE +environment variable. +.Ev BLOCKSIZE +may be specified directly in bytes, or in multiples of a kilobyte by +specifying a number followed by ``K'' or ``k'', in multiples of a +megabyte by specifying a number followed by ``M'' or ``m'' or in +multiples of a gigabyte by specifying a number followed by ``G'' or +``g''. +Multiples must be integers. +.Pp +Valid values of +.Ev BLOCKSIZE +are 512 bytes to 1 gigabyte. +Sizes less than 512 bytes are rounded up to 512 bytes, and sizes +greater than 1 GB are rounded down to 1 GB. +In each case +.Fn getbsize +produces a warning message. +.Pp +The +.Fn getbsize +function returns a pointer to a null-terminated string describing +the block size, something like +.Dq 1K-blocks . +The memory referenced by +.Fa headerlenp +is filled in with the length of the string (not including the +terminating null). +The memory referenced by +.Fa blocksizep +is filled in with block size, in bytes. +.Sh SEE ALSO +.Xr df 1 , +.Xr du 1 , +.Xr ls 1 , +.Xr systat 1 , +.Xr environ 7 +.Sh HISTORY +The +.Fn getbsize +function first appeared in +.Bx 4.4 . diff --git a/src/Makefile.am b/src/Makefile.am index c9a4df0..6efddf5 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -52,6 +52,7 @@ libbsd_la_SOURCES = \ fparseln.c \ fpurge.c \ funopen.c \ + getbsize.c \ getpeereid.c \ hash/md5.c \ hash/md5hl.c \ diff --git a/src/getbsize.c b/src/getbsize.c new file mode 100644 index 0000000..3e3ff49 --- /dev/null +++ b/src/getbsize.c @@ -0,0 +1,102 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. 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. + * 3. 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. + * + * @(#)getbsize.c 8.1 (Berkeley) 6/4/93 + * $FreeBSD: src/lib/libc/gen/getbsize.c,v 1.9 2008/08/04 06:53:13 cperciva Exp $ + * $DragonFly: src/lib/libc/gen/getbsize.c,v 1.4 2005/11/13 00:07:42 swildner Exp $ + */ + +#include +#include +#include +#include + +char * +getbsize(int *headerlenp, long *blocksizep) +{ + static char header[20]; + long n, max, mul, blocksize; + char *ep, *p; + const char *form; + +#define KB (1024L) +#define MB (1024L * 1024L) +#define GB (1024L * 1024L * 1024L) +#define MAXB GB /* No tera, peta, nor exa. */ + form = ""; + if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') { + if ((n = strtol(p, &ep, 10)) < 0) + goto underflow; + if (n == 0) + n = 1; + if (*ep && ep[1]) + goto fmterr; + switch (*ep) { + case 'G': case 'g': + form = "G"; + max = MAXB / GB; + mul = GB; + break; + case 'K': case 'k': + form = "K"; + max = MAXB / KB; + mul = KB; + break; + case 'M': case 'm': + form = "M"; + max = MAXB / MB; + mul = MB; + break; + case '\0': + max = MAXB; + mul = 1; + break; + default: +fmterr: warnx("%s: unknown blocksize", p); + n = 512; + max = MAXB; + mul = 1; + break; + } + if (n > max) { + warnx("maximum blocksize is %ldG", MAXB / GB); + n = max; + } + if ((blocksize = n * mul) < 512) { +underflow: warnx("minimum blocksize is 512"); + form = ""; + blocksize = n = 512; + } + } else + blocksize = n = 512; + + snprintf(header, sizeof(header), "%ld%s-blocks", n, form); + *headerlenp = strlen(header); + *blocksizep = blocksize; + return (header); +} diff --git a/src/libbsd.map b/src/libbsd.map index 4d483df..c0286a3 100644 --- a/src/libbsd.map +++ b/src/libbsd.map @@ -112,6 +112,8 @@ LIBBSD_0.6 { } LIBBSD_0.5; LIBBSD_0.7 { + getbsize; + funopen; _time32_to_time; -- 2.47.3