usr/src/lib/libcmd/common/cmd.h

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1992-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                                                                      *
  20 ***********************************************************************/
  21 #pragma prototyped
  22 /*
  23  * AT&T Research
  24  *
  25  * builtin cmd definitions
  26  */
  27
  28 #ifndef _CMD_H
  29 #define _CMD_H
  30
  31 #include <ast.h>
  32 #include <error.h>
  33 #include <stak.h>
  34 #include <shcmd.h>
  35
  36 #define cmdinit                 _cmd_init
  37
  38 #define ERROR_CALLBACK          ERROR_SET
  39
  40 #if _BLD_cmd && defined(__EXPORT__)
  41 #define extern          __EXPORT__
  42 #endif
  43
  44 #include <cmdext.h>
  45
  46 #undef  extern
  47
  48 #if defined(CMD_BUILTIN) && !defined(CMD_STANDALONE)
  49 #define CMD_STANDALONE  CMD_BUILTIN
  50 #endif
  51
  52 #ifdef CMD_STANDALONE
  53
  54 #define CMD_CONTEXT(c)          ((Shbltin_t*)0)
  55
  56 #if CMD_DYNAMIC
  57
  58 #include <dlldefs.h>
  59
  60 #else
  61
  62 extern int CMD_STANDALONE(int, char**, void*);
  63
  64 #endif
  65
  66 #ifndef CMD_BUILTIN
  67
  68 /*
  69  * command initialization
  70  */
  71
  72 static int
  73 cmdinit(int argc, register char** argv, void* context, const char* catalog, int flags)
  74 {
  75         register char*  cp;
  76         register char*  pp;
  77
  78         if (cp = strrchr(argv[0], '/'))
  79                 cp++;
  80         else
  81                 cp = argv[0];
  82         if (pp = strrchr(cp, '_'))
  83                 cp = pp + 1;
  84         error_info.id = cp;
  85         if (!error_info.catalog)
  86                 error_info.catalog = (char*)catalog;
  87         opt_info.index = 0;
  88         if (context)
  89                 error_info.flags |= flags & ~(ERROR_CALLBACK|ERROR_NOTIFY);
  90         return 0;
  91 }
  92
  93 #endif
  94
  95 int
  96 main(int argc, char** argv)
  97 {
  98 #if CMD_DYNAMIC
  99         register char*  s;
 100         register char*  t;
 101         void*           dll;
 102         Shbltin_f       fun;
 103         char            buf[64];
 104
 105         if (s = strrchr(argv[0], '/'))
 106                 s++;
 107         else if (!(s = argv[0]))
 108                 return 127;
 109         if ((t = strrchr(s, '_')) && *++t)
 110                 s = t;
 111         buf[0] = '_';
 112         buf[1] = 'b';
 113         buf[2] = '_';
 114         strncpy(buf + 3, s, sizeof(buf) - 4);
 115         buf[sizeof(buf) - 1] = 0;
 116         if (t = strchr(buf, '.'))
 117                 *t = 0;
 118         for (;;)
 119         {
 120                 if (dll = dlopen(NiL, RTLD_LAZY))
 121                 {
 122                         if (fun = (Shbltin_f)dlsym(dll, buf + 1))
 123                                 break;
 124                         if (fun = (Shbltin_f)dlsym(dll, buf))
 125                                 break;
 126                 }
 127                 if (dll = dllplug(NiL, "cmd", NiL, RTLD_LAZY, NiL, 0))
 128                 {
 129                         if (fun = (Shbltin_f)dlsym(dll, buf + 1))
 130                                 break;
 131                         if (fun = (Shbltin_f)dlsym(dll, buf))
 132                                 break;
 133                 }
 134                 return 127;
 135         }
 136         return (*fun)(argc, argv, NiL);
 137 #else
 138         return CMD_STANDALONE(argc, argv, NiL);
 139 #endif
 140 }
 141
 142 #else
 143
 144 #undef  cmdinit
 145 #ifdef _MSC_VER
 146 #define CMD_CONTEXT(p)          ((Shbltin_t*)(p))
 147 #define cmdinit(a,b,c,d,e)      do{if(_cmd_init(a,b,c,d,e))return -1;}while(0)
 148 #else
 149 #define CMD_CONTEXT(p)          (((p)&&((Shbltin_t*)(p))->version>=20071012&&((Shbltin_t*)(p))->version<20350101)?((Shbltin_t*)(p)):0)
 150 #define cmdinit(a,b,c,d,e)      do{if((c)&&!CMD_CONTEXT(c))c=0;if(_cmd_init(a,b,c,d,e))return -1;}while(0)
 151 #endif
 152
 153 #if _BLD_cmd && defined(__EXPORT__)
 154 #define extern                  extern __EXPORT__
 155 #endif
 156
 157 extern int      _cmd_init(int, char**, void*, const char*, int);
 158
 159 #undef  extern
 160
 161 #endif
 162
 163 #endif