Date: Tue, 19 May 2009 17:40:22 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r192398 - in head/usr.bin: . perror Message-ID: <200905191740.n4JHeMMU005087@svn.freebsd.org>
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Author: gnn Date: Tue May 19 17:40:22 2009 New Revision: 192398 URL: http://svn.freebsd.org/changeset/base/192398 Log: Add a new program, perror, which takes an errno as a command line argument and outputs the associated textual message in the same way that perror(3) would if called within a program. Added: head/usr.bin/perror/ head/usr.bin/perror/Makefile (contents, props changed) head/usr.bin/perror/perror.1 (contents, props changed) head/usr.bin/perror/perror.c (contents, props changed) Modified: head/usr.bin/Makefile Modified: head/usr.bin/Makefile ============================================================================== --- head/usr.bin/Makefile Tue May 19 17:35:15 2009 (r192397) +++ head/usr.bin/Makefile Tue May 19 17:40:22 2009 (r192398) @@ -149,6 +149,7 @@ SUBDIR= alias \ passwd \ paste \ pathchk \ + perror \ pr \ printenv \ printf \ Added: head/usr.bin/perror/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/usr.bin/perror/Makefile Tue May 19 17:40:22 2009 (r192398) @@ -0,0 +1,6 @@ +# $FreeBSD$ + +PROG= perror +SRCS= perror.c + +.include <bsd.prog.mk> Added: head/usr.bin/perror/perror.1 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/usr.bin/perror/perror.1 Tue May 19 17:40:22 2009 (r192398) @@ -0,0 +1,50 @@ +.\" +.\" Copyright (c) 2009 Advanced Computing Technologies LLC +.\" Written by: George V. Neville-Neil <gnn@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. +.\" +.\" $FreeBSD$ +.\" +.Dd May 12, 2009 +.Dt PERROR 1 +.Os +.Sh NAME +.Nm perror +.Nd "print an error number as a string" +.Sh SYNOPSIS +.Nm +.Op Ar number +.Sh DESCRIPTION +The +.Nm +program takes a raw errno value and prints it as a string. +.Sh SEE ALSO +.Xr perror 3 +.Sh HISTORY +The +.Nm +program first appeared in +.Fx 8.0 . +.Sh AUTHORS +.An George V. Neville-Neil Added: head/usr.bin/perror/perror.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/usr.bin/perror/perror.c Tue May 19 17:40:22 2009 (r192398) @@ -0,0 +1,76 @@ +/*- + * Copyright (c) 2009 Advanced Computing Technologies LLC + * Written by: George V. Neville-Neil <gnn@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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/errno.h> + +#define MAX_ERR 256 + +void usage() +{ + + printf("usage: perror number\n"); + printf("number must be between 1 and %d\n", ELAST); + exit(1); +} + +int main(int argc, char **argv) +{ + + char errstr[MAX_ERR]; + char *cp; + int errnum; + + if (argc != 2) + usage(); + + errnum = strtol(argv[1], &cp, 0); + + if (((errnum == 0) && (errno == EINVAL)) || (*cp != '\0')) { + printf("Argument %s not a number.\n", argv[1]); + usage(); + } + + if ((errnum <=0) || (errnum > ELAST)) { + printf("Number %d out of range.\n", errnum); + usage(); + } + + if (strerror_r(errnum, errstr, sizeof(errstr)) < 0) { + printf("Could not find error number %d.\n", errnum); + usage(); + } + + printf("Error %d is \"%s\"\n", errnum, errstr); + + exit(0); +}
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