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/*
* Copyright (c) 2019 The Adélie Userland Team. 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 copyright holder 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDER 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/utsname.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void usage(void) __attribute__((noreturn));
int main(int argc, char **argv) {
struct utsname sysinfo;
bool mflag, nflag, oflag, rflag, sflag, vflag;
mflag = nflag = oflag = rflag = sflag = vflag = false;
char ch;
bool space = false;
while ((ch = getopt(argc, argv, "amnorsv")) != -1) {
switch (ch) {
case 'a':
mflag = nflag = oflag = rflag = sflag = vflag = true;
break;
case 'm':
mflag = true;
break;
case 'n':
nflag = true;
break;
case 'o':
oflag = true;
break;
case 'r':
rflag = true;
break;
case 's':
sflag = true;
break;
case 'v':
vflag = true;
break;
default:
usage();
/*UNREACHABLE*/
}
}
if (!(mflag || nflag || rflag || vflag)) {
sflag = true;
}
if (uname(&sysinfo) != 0) {
fprintf(stderr, "uname failed: %s\n", strerror(errno));
exit(errno);
}
if (sflag) {
printf("%s", sysinfo.sysname);
space = true;
}
if (nflag) {
printf("%s%s", (space ? " " : ""), sysinfo.nodename);
space = true;
}
if (rflag) {
printf("%s%s", (space ? " " : ""), sysinfo.release);
space = true;
}
if (vflag) {
printf("%s%s", (space ? " " : ""), sysinfo.version);
space = true;
}
if (mflag) {
printf("%s%s", (space ? " " : ""), sysinfo.machine);
space = true;
}
if (oflag) {
printf("%s%s", (space ? " " : ""), sysinfo.sysname);
}
printf("\n");
return EXIT_SUCCESS;
}
void usage(void) {
fprintf(stderr, "usage: uname [-amnorsv]\n");
exit(1);
}
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