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Diffstat (limited to 'src/uname.c')
| -rw-r--r-- | src/uname.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/uname.c b/src/uname.c new file mode 100644 index 000000000..77eaae677 --- /dev/null +++ b/src/uname.c @@ -0,0 +1,155 @@ +/* uname -- print system information + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + + 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 2, 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Option Example + + -s, --sysname SunOS + -n, --nodename rocky8 + -r, --release 4.0 + -v, --version + -m, --machine sun + -a, --all SunOS rocky8 4.0 sun + + The default behavior is equivalent to `-s'. + + David MacKenzie <djm@ai.mit.edu> */ + +#include <stdio.h> +#include <sys/types.h> +#include <sys/utsname.h> +#include <getopt.h> +#include "system.h" + +void error (); +void print_element (); +void usage (); + +/* Values that are bitwise or'd into `toprint'. */ +/* Operating system name. */ +#define PRINT_SYSNAME 1 + +/* Node name on a communications network. */ +#define PRINT_NODENAME 2 + +/* Operating system release. */ +#define PRINT_RELEASE 4 + +/* Operating system version. */ +#define PRINT_VERSION 8 + +/* Machine hardware name. */ +#define PRINT_MACHINE 16 + +/* Mask indicating which elements of the name to print. */ +unsigned char toprint; + +/* The name this program was run with, for error messages. */ +char *program_name; + +struct option long_options[] = +{ + {"sysname", 0, NULL, 's'}, + {"nodename", 0, NULL, 'n'}, + {"release", 0, NULL, 'r'}, + {"version", 0, NULL, 'v'}, + {"machine", 0, NULL, 'm'}, + {"all", 0, NULL, 'a'}, + {NULL, 0, NULL, 0} +}; + +void +main (argc, argv) + int argc; + char **argv; +{ + struct utsname name; + int c; + + program_name = argv[0]; + toprint = 0; + + while ((c = getopt_long (argc, argv, "snrvma", long_options, (int *) 0)) + != EOF) + { + switch (c) + { + case 's': + toprint |= PRINT_SYSNAME; + break; + case 'n': + toprint |= PRINT_NODENAME; + break; + case 'r': + toprint |= PRINT_RELEASE; + break; + case 'v': + toprint |= PRINT_VERSION; + break; + case 'm': + toprint |= PRINT_MACHINE; + break; + case 'a': + toprint = PRINT_SYSNAME | PRINT_NODENAME | PRINT_RELEASE | + PRINT_VERSION | PRINT_MACHINE; + break; + default: + usage (); + } + } + + if (optind != argc) + usage (); + + if (toprint == 0) + toprint = PRINT_SYSNAME; + + if (uname (&name) == -1) + error (1, errno, "cannot get system name"); + + print_element (PRINT_SYSNAME, name.sysname); + print_element (PRINT_NODENAME, name.nodename); + print_element (PRINT_RELEASE, name.release); + print_element (PRINT_VERSION, name.version); + print_element (PRINT_MACHINE, name.machine); + + exit (0); +} + +/* If the name element set in MASK is selected for printing in `toprint', + print ELEMENT; then print a space unless it is the last element to + be printed, in which case print a newline. */ + +void +print_element (mask, element) + unsigned char mask; + char *element; +{ + if (toprint & mask) + { + toprint &= ~mask; + printf ("%s%c", element, toprint ? ' ' : '\n'); + } +} + +void +usage () +{ + fprintf (stderr, "\ +Usage: %s [-snrvma] [--sysname] [--nodename] [--release] [--version]\n\ + [--machine] [--all]\n", program_name); + exit (1); +} |