Viewing file:  uname.c (2.36 KB) -rw-r--r--
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/*
* uname - print system information
*
* usage: uname [-amnrsv]
*
*/
#include <config.h>
#include <stdio.h>
#include "bashtypes.h"
#if defined (HAVE_UNAME)
# include <sys/utsname.h>
#else
struct utsname {
char sysname[32];
char nodename[32];
char release[32];
char version[32];
char machine[32];
};
#endif
#include <errno.h>
#include "builtins.h"
#include "shell.h"
#include "bashgetopt.h"
#define FLAG_SYSNAME 0x01 /* -s */
#define FLAG_NODENAME 0x02 /* -n */
#define FLAG_RELEASE 0x04 /* -r */
#define FLAG_VERSION 0x08 /* -v */
#define FLAG_MACHINE 0x10 /* -m, -p */
#define FLAG_ALL 0x1f
#ifndef errno
extern int errno;
#endif
static void uprint();
static int uname_flags;
uname_builtin (list)
WORD_LIST *list;
{
int opt, r;
struct utsname uninfo;
uname_flags = 0;
reset_internal_getopt ();
while ((opt = internal_getopt (list, "amnprsv")) != -1)
{
switch (opt)
{
case 'a':
uname_flags |= FLAG_ALL;
break;
case 'm':
case 'p':
uname_flags |= FLAG_MACHINE;
break;
case 'n':
uname_flags |= FLAG_NODENAME;
break;
case 'r':
uname_flags |= FLAG_RELEASE;
break;
case 's':
uname_flags |= FLAG_SYSNAME;
break;
case 'v':
uname_flags |= FLAG_VERSION;
break;
default:
builtin_usage ();
return (EX_USAGE);
}
}
list = loptend;
if (list)
{
builtin_usage ();
return (EX_USAGE);
}
if (uname_flags == 0)
uname_flags = FLAG_SYSNAME;
/* Only ancient systems will not have uname(2). */
#ifdef HAVE_UNAME
if (uname (&uninfo) < 0)
{
builtin_error ("cannot get system name: %s", strerror (errno));
return (EXECUTION_FAILURE);
}
#else
builtin_error ("cannot get system information: uname(2) not available");
return (EXECUTION_FAILURE);
#endif
uprint (FLAG_SYSNAME, uninfo.sysname);
uprint (FLAG_NODENAME, uninfo.nodename);
uprint (FLAG_RELEASE, uninfo.release);
uprint (FLAG_VERSION, uninfo.version);
uprint (FLAG_MACHINE, uninfo.machine);
return (EXECUTION_SUCCESS);
}
static void
uprint (flag, info)
int flag;
char *info;
{
if (uname_flags & flag)
{
uname_flags &= ~flag;
printf ("%s%c", info, uname_flags ? ' ' : '\n');
}
}
char *uname_doc[] = {
"display information about the system",
(char *)NULL
};
struct builtin uname_struct = {
"uname",
uname_builtin,
BUILTIN_ENABLED,
uname_doc,
"uname [-amnrsv]",
0
};
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