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sortix--sortix/utils/uname.cpp

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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
uname.cpp
Print system information.
*******************************************************************************/
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#include <sys/utsname.h>
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#include <errno.h>
#include <error.h>
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#include <limits.h>
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#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#if !defined(VERSIONSTR)
#define VERSIONSTR "unknown version"
#endif
const unsigned long PRINT_KERNELNAME = 1UL << 0UL;
const unsigned long PRINT_NODENAME = 1UL << 1UL;
const unsigned long PRINT_KERNELREL = 1UL << 2UL;
const unsigned long PRINT_KERNELVER = 1UL << 3UL;
const unsigned long PRINT_MACHINE = 1UL << 4UL;
const unsigned long PRINT_PROCESSOR = 1UL << 5UL;
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const unsigned long PRINT_HWPLATFORM = 1UL << 6UL;
const unsigned long PRINT_OPSYS = 1UL << 7UL;
bool has_printed = false;
void DoPrint(const char* msg)
{
if ( has_printed )
printf(" ");
printf("%s", msg);
has_printed = true;
}
void Usage(FILE* fp, const char* argv0)
{
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fprintf(fp, "Usage: %s [OPTION]...\n", argv0);
fprintf(fp, "Print certain system information.\n");
}
void Help(FILE* fp, const char* argv0)
{
Usage(fp, argv0);
}
void Version(FILE* fp, const char* argv0)
{
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fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
}
int main(int argc, char* argv[])
{
const char* argv0 = argv[0];
unsigned long flags = 0;
for ( int i = 1; i < argc; i++ )
{
const char* arg = argv[i];
if ( arg[0] != '-' )
{
fprintf(stderr, "%s: extra operand: %s\n", argv0, arg);
Usage(stderr, argv0);
exit(1);
}
if ( arg[1] != '-' )
for ( size_t i = 1; arg[i]; i++ )
switch ( arg[i] )
{
case 'a': flags |= LONG_MAX; break;
case 's': flags |= PRINT_KERNELNAME; break;
case 'n': flags |= PRINT_NODENAME; break;
case 'r': flags |= PRINT_KERNELREL; break;
case 'v': flags |= PRINT_KERNELVER; break;
case 'm': flags |= PRINT_MACHINE; break;
case 'p': flags |= PRINT_PROCESSOR; break;
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case 'i': flags |= PRINT_HWPLATFORM; break;
case 'o': flags |= PRINT_OPSYS; break;
default:
fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, arg[i]);
Usage(stderr, argv0);
exit(1);
}
else if ( !strcmp(arg, "--kernel-name") )
flags |= PRINT_KERNELNAME;
else if ( !strcmp(arg, "--nodename") )
flags |= PRINT_NODENAME;
else if ( !strcmp(arg, "--kernel-release") )
flags |= PRINT_KERNELREL;
else if ( !strcmp(arg, "--kernel-version") )
flags |= PRINT_KERNELVER;
else if ( !strcmp(arg, "--machine") )
flags |= PRINT_MACHINE;
else if ( !strcmp(arg, "--processor") )
flags |= PRINT_PROCESSOR;
else if ( !strcmp(arg, "--hardware-platform") )
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flags |= PRINT_HWPLATFORM;
else if ( !strcmp(arg, "--operating-system") )
flags |= PRINT_OPSYS;
else if ( !strcmp(arg, "--help") ) { Help(stdout, argv0); exit(0); }
else if ( !strcmp(arg, "--usage") ) { Usage(stdout, argv0); exit(0); }
else if ( !strcmp(arg, "--version") ) { Version(stdout, argv0); exit(0); }
else
{
fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
Usage(stderr, argv0);
exit(1);
}
}
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static struct utsname utsname;
if ( uname(&utsname) < 0 )
error(1, errno, "uname");
if ( !flags )
flags = PRINT_KERNELNAME;
if ( flags & PRINT_KERNELNAME )
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DoPrint(utsname.sysname);
if ( flags & PRINT_NODENAME )
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DoPrint(utsname.nodename);
if ( flags & PRINT_KERNELREL )
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DoPrint(utsname.release);
if ( flags & PRINT_KERNELVER )
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DoPrint(utsname.version);
if ( flags & PRINT_MACHINE )
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DoPrint(utsname.machine);
if ( flags & PRINT_PROCESSOR )
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DoPrint(utsname.processor);
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if ( flags & PRINT_HWPLATFORM )
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DoPrint(utsname.hwplatform);
if ( flags & PRINT_OPSYS )
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DoPrint(utsname.opsysname);
printf("\n");
return 0;
}