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/*
* by tlh
*
* The uname program for system information: kernel name, kernel
* release, kernel release, machine, processor, platform, os and
* hostname.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
enum uname_fields {
UN_SYSNAME,
UN_NODENAME,
UN_RELEASE,
UN_VERSION,
UN_MACHINE,
#if NOT_IMPLEMENTED_PROCESSOR
UN_PROCESSOR,
#endif
UN_HARDWARE,
#if NOT_IMPLEMENTED_OS
UN_OS,
#endif
UN_NR_FIELDS
};
static void usage(FILE *stream, const char *progname)
{
fprintf(stream,
"Usage: %s [OPTION] . . .\n"
"Print system information, No options defaults to -s.\n"
"\n"
" -a print all the information in the same order as follows below\n"
" -s kernel name\n"
" -n network node name (hostname)\n"
" -r kernel release\n"
" -v kernel version\n" " -m machine hardware name\n"
#if NOT_IMPLEMENTED_PROCESSOR
" -p processor type\n"
#endif
" -i hardware platform\n"
#if NOT_IMPLEMENTED_OS
" -o operating system\n"
#endif
"\n" " -h help/usage\n" "\n", progname);
}
static char *make_hardware(const char *machine)
{
char *hardware;
hardware = strdup(machine);
if (!hardware) {
fprintf(stderr, "strdup() failed: %s\n", strerror(errno));
goto end;
}
if (strlen(hardware) == 4
&& hardware[0] == 'i' && hardware[2] == '8' && hardware[3] == '6') {
hardware[1] = '3';
}
end:
return hardware;
}
int main(int argc, char *argv[])
{
int ec = 1;
int opt;
int i;
int nr_pr;
struct utsname buf;
char *uname_fields[UN_NR_FIELDS] = { NULL };
if (-1 == uname(&buf)) {
fprintf(stderr, "uname() failure: %s\n", strerror(errno));
goto end;
}
if (1 == argc)
/* no options given - default to -s */
uname_fields[UN_SYSNAME] = buf.sysname;
while ((opt = getopt(argc, argv, "asnrvmpioh")) != -1) {
switch (opt) {
case 'a':
uname_fields[UN_SYSNAME] = buf.sysname;
uname_fields[UN_NODENAME] = buf.nodename;
uname_fields[UN_RELEASE] = buf.release;
uname_fields[UN_VERSION] = buf.version;
uname_fields[UN_MACHINE] = buf.machine;
uname_fields[UN_HARDWARE] = make_hardware(buf.machine);
if (!uname_fields[UN_HARDWARE])
goto end;
break;
case 's':
uname_fields[UN_SYSNAME] = buf.sysname;
break;
case 'n':
uname_fields[UN_NODENAME] = buf.nodename;
break;
case 'r':
uname_fields[UN_RELEASE] = buf.release;
break;
case 'v':
uname_fields[UN_VERSION] = buf.version;
break;
case 'm':
uname_fields[UN_MACHINE] = buf.machine;
break;
#if NOT_IMPLEMENTED_PROCESSOR
case 'p':
break;
#endif
case 'i':
uname_fields[UN_HARDWARE] = make_hardware(buf.machine);
if (!uname_fields[UN_HARDWARE])
goto end;
break;
#if NOT_IMPLEMENTED_OS
case 'o':
break;
#endif
case 'h':
usage(stdout, argv[0]);
ec = 0;
goto end;
break;
default:
usage(stderr, argv[0]);
goto end;
break;
}
}
for (nr_pr = 0, i = UN_SYSNAME; i < UN_NR_FIELDS; i++) {
if (!uname_fields[i])
continue;
if (nr_pr)
fputc(' ', stdout);
fputs(uname_fields[i], stdout);
nr_pr++;
}
fputc('\n', stdout);
ec = 0;
end:
if (uname_fields[UN_HARDWARE])
free(uname_fields[UN_HARDWARE]);
return ec;
}
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