| 1 | /*
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| 2 | * uname - print system information
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| 3 | *
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| 4 | * usage: uname [-amnrsv]
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| 5 | *
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| 6 | */
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| 7 |
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| 8 | #include <config.h>
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| 9 | #include <stdio.h>
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| 10 |
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| 11 | #include "bashtypes.h"
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| 12 |
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| 13 | #if defined (HAVE_UNAME)
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| 14 | # include <sys/utsname.h>
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| 15 | #else
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| 16 | struct utsname {
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| 17 | char sysname[32];
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| 18 | char nodename[32];
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| 19 | char release[32];
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| 20 | char version[32];
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| 21 | char machine[32];
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| 22 | };
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| 23 | #endif
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| 24 |
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| 25 | #include <errno.h>
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| 26 |
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| 27 | #include "builtins.h"
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| 28 | #include "shell.h"
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| 29 | #include "bashgetopt.h"
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| 30 |
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| 31 | #define FLAG_SYSNAME 0x01 /* -s */
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| 32 | #define FLAG_NODENAME 0x02 /* -n */
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| 33 | #define FLAG_RELEASE 0x04 /* -r */
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| 34 | #define FLAG_VERSION 0x08 /* -v */
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| 35 | #define FLAG_MACHINE 0x10 /* -m, -p */
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| 36 |
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| 37 | #define FLAG_ALL 0x1f
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| 38 |
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| 39 | #ifndef errno
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| 40 | extern int errno;
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| 41 | #endif
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| 42 |
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| 43 | static void uprint();
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| 44 |
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| 45 | static int uname_flags;
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| 46 |
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| 47 | uname_builtin (list)
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| 48 | WORD_LIST *list;
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| 49 | {
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| 50 | int opt, r;
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| 51 | struct utsname uninfo;
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| 52 |
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| 53 | uname_flags = 0;
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| 54 | reset_internal_getopt ();
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| 55 | while ((opt = internal_getopt (list, "amnprsv")) != -1)
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| 56 | {
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| 57 | switch (opt)
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| 58 | {
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| 59 | case 'a':
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| 60 | uname_flags |= FLAG_ALL;
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| 61 | break;
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| 62 | case 'm':
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| 63 | case 'p':
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| 64 | uname_flags |= FLAG_MACHINE;
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| 65 | break;
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| 66 | case 'n':
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| 67 | uname_flags |= FLAG_NODENAME;
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| 68 | break;
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| 69 | case 'r':
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| 70 | uname_flags |= FLAG_RELEASE;
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| 71 | break;
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| 72 | case 's':
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| 73 | uname_flags |= FLAG_SYSNAME;
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| 74 | break;
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| 75 | case 'v':
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| 76 | uname_flags |= FLAG_VERSION;
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| 77 | break;
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| 78 | default:
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| 79 | builtin_usage ();
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| 80 | return (EX_USAGE);
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| 81 | }
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| 82 | }
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| 83 | list = loptend;
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| 84 |
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| 85 | if (list)
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| 86 | {
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| 87 | builtin_usage ();
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| 88 | return (EX_USAGE);
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| 89 | }
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| 90 |
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| 91 | if (uname_flags == 0)
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| 92 | uname_flags = FLAG_SYSNAME;
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| 93 |
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| 94 | /* Only ancient systems will not have uname(2). */
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| 95 | #ifdef HAVE_UNAME
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| 96 | if (uname (&uninfo) < 0)
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| 97 | {
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| 98 | builtin_error ("cannot get system name: %s", strerror (errno));
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| 99 | return (EXECUTION_FAILURE);
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| 100 | }
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| 101 | #else
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| 102 | builtin_error ("cannot get system information: uname(2) not available");
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| 103 | return (EXECUTION_FAILURE);
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| 104 | #endif
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| 105 |
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| 106 | uprint (FLAG_SYSNAME, uninfo.sysname);
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| 107 | uprint (FLAG_NODENAME, uninfo.nodename);
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| 108 | uprint (FLAG_RELEASE, uninfo.release);
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| 109 | uprint (FLAG_VERSION, uninfo.version);
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| 110 | uprint (FLAG_MACHINE, uninfo.machine);
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| 111 |
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| 112 | return (EXECUTION_SUCCESS);
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| 113 | }
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| 114 |
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| 115 | static void
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| 116 | uprint (flag, info)
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| 117 | int flag;
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| 118 | char *info;
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| 119 | {
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| 120 | if (uname_flags & flag)
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| 121 | {
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| 122 | uname_flags &= ~flag;
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| 123 | printf ("%s%c", info, uname_flags ? ' ' : '\n');
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| 124 | }
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| 125 | }
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| 126 |
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| 127 | char *uname_doc[] = {
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| 128 | "display information about the system",
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| 129 | (char *)NULL
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| 130 | };
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| 131 |
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| 132 | struct builtin uname_struct = {
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| 133 | "uname",
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| 134 | uname_builtin,
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| 135 | BUILTIN_ENABLED,
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| 136 | uname_doc,
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| 137 | "uname [-amnrsv]",
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| 138 | 0
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| 139 | };
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