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0
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1 /*
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2 Package: dyncall
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3 File: bindings/shell.c
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4 Description: printf(1) style function call mechanism
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5 License:
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1
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6 Copyright (c) 2007-2015 Daniel Adler <dadler@uni-goettingen.de>,
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0
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7 Tassilo Philipp <tphilipp@potion-studios.com>
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8
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9 Permission to use, copy, modify, and distribute this software for any
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10 purpose with or without fee is hereby granted, provided that the above
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11 copyright notice and this permission notice appear in all copies.
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12
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13 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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14 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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15 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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16 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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20
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21 */
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22
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23 #include "../../dyncall/dyncall/dyncall.h"
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24 #include "../../dyncall/dynload/dynload.h"
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25 #include "../../dyncall/dyncall/dyncall_signature.h"
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26 #include <stdio.h>
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40
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27 #include <string.h>
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0
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28 #include <stdlib.h> /* needed on some platforms to make atof work _at_runtime_ */
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29
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24
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30 #define SHDC_VERSION "1.0"
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0
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31
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32
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33 void usage(const char* s)
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34 {
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35 printf(
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36 "Usage: %s -l SO\n"
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37 " %s -c SO SYM SIG [ARGS]\n"
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38 " %s -v\n"
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39 " where SO is the name of the shared object.\n"
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40 "\n"
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41 " -l lists all symbol names in the shared object\n"
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42 " -c calls function in the shared object, where SYM is the symbol name,\n"
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43 " SIG the symbol's type signature, and ARGS the arguments.\n"
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44 " -v displays the binding's version\n",
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45 s, s, s
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46 );
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47 }
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48
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49
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50 int main(int argc, char* argv[])
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51 {
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52 const char* libPath;
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53 const char* symName;
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54 const DCsigchar* sig;
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55 const DCsigchar* i;
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56 void* sym;
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57 DCCallVM* vm;
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58 DLLib* dlLib;
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59 DLSyms* dlSyms;
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60 int c, l;
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61
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62 if(argc == 2 && strcmp(argv[1], "-v") == 0) {
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63 printf(SHDC_VERSION"\n");
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64 return 0;
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65 }
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66
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67 /* Parse arguments and check validity. */
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68 /* Need at least shared object name and action, and symbol name and signature string for call. */
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69 if(argc < 2) {
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70 usage(argv[0]);
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71 return 1;
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72 }
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73
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74 c = strcmp(argv[1], "-c");
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75 l = strcmp(argv[1], "-l");
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76 if((c != 0 && l != 0) || (c == 0 && argc < 4)) {
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77 usage(argv[0]);
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78 return 1;
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79 }
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80
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40
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81 /* if lib path is empty string, use NULL as reference to own process/exe */
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82 libPath = argv[2][0] == '\0' ? NULL : argv[2];
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0
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83
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84 /* List symbols, if 'ls', else it must be 'call', so proceed to call. */
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85 if(l == 0) {
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86 dlSyms = dlSymsInit(libPath);
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87 if(!dlSyms) {
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40
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88 printf("Can't load \"%s\".\n", libPath?libPath:"<NULL>");
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0
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89 usage(argv[0]);
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90 return 1;
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91 }
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92
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93 /* hacky: reuse c and l */
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94 for(c=dlSymsCount(dlSyms), l=0; l<c; ++l)
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95 printf("%s\n", dlSymsName(dlSyms, l));
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96
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97 dlSymsCleanup(dlSyms);
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98 }
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99 else {
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100 /* Check if number of arguments matches sigstring spec. */
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101 /*if(n != argc-4)@@@*/ /* 0 is prog, 1 is flag, 2 is lib, 3 is symbol name, 4 is sig */
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102
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103 /* Load library and get a pointer to the symbol to call. */
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104 dlLib = dlLoadLibrary(libPath);
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105 if(!dlLib) {
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40
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106 printf("Can't load \"%s\".\n", libPath?libPath:"<NULL>");
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0
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107 usage(argv[0]);
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108 return 1;
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109 }
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110
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111 symName = argv[3];
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112 sig = i = argv[4];
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113
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114 sym = dlFindSymbol(dlLib, symName);
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115 if(!sym) {
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40
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116 /* this might be a syscall attempt, check if "symbol" is numeric */
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117 int n;
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118 if(sscanf(symName, "%d", &n) == 0) {
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119 printf("Can't find symbol \"%s\".\n", symName);
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120 dlFreeLibrary(dlLib);
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121 usage(argv[0]);
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122 return 1;
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123 }
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124 sym = (void*)(size_t)n;
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0
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125 }
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126
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127
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128 vm = dcNewCallVM(4096/*@@@*/);/*@@@ error checking */
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129 dcReset(vm);
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130
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131 while(*i != '\0' && *i != DC_SIGCHAR_ENDARG) {
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132 switch(*i) {
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133 case DC_SIGCHAR_CC_PREFIX:
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40
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134 if(*(i+1) != '\0')
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135 {
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136 DCint mode = dcGetModeFromCCSigChar(*++i);
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137 if(mode != DC_ERROR_UNSUPPORTED_MODE)
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138 dcMode(vm, mode);
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0
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139 }
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140 sig += 2;
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141 break;
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142
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143 case DC_SIGCHAR_BOOL: dcArgBool (vm, (DCbool) atoi (argv[5+i-sig] )); break;
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144 case DC_SIGCHAR_CHAR: dcArgChar (vm, (DCchar) atoi (argv[5+i-sig] )); break;
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145 case DC_SIGCHAR_UCHAR: dcArgChar (vm, (DCchar)(DCuchar) atoi (argv[5+i-sig] )); break;
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146 case DC_SIGCHAR_SHORT: dcArgShort (vm, (DCshort) atoi (argv[5+i-sig] )); break;
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147 case DC_SIGCHAR_USHORT: dcArgShort (vm, (DCshort)(DCushort)atoi (argv[5+i-sig] )); break;
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148 case DC_SIGCHAR_INT: dcArgInt (vm, (DCint) strtol (argv[5+i-sig],NULL,10)); break;
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149 case DC_SIGCHAR_UINT: dcArgInt (vm, (DCint)(DCuint) strtoul (argv[5+i-sig],NULL,10)); break;
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150 case DC_SIGCHAR_LONG: dcArgLong (vm, (DClong) strtol (argv[5+i-sig],NULL,10)); break;
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151 case DC_SIGCHAR_ULONG: dcArgLong (vm, (DCulong) strtoul (argv[5+i-sig],NULL,10)); break;
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152 case DC_SIGCHAR_LONGLONG: dcArgLongLong(vm, (DClonglong) strtoll (argv[5+i-sig],NULL,10)); break;
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153 case DC_SIGCHAR_ULONGLONG: dcArgLongLong(vm, (DCulonglong) strtoull(argv[5+i-sig],NULL,10)); break;
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154 case DC_SIGCHAR_FLOAT: dcArgFloat (vm, (DCfloat) atof (argv[5+i-sig] )); break;
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155 case DC_SIGCHAR_DOUBLE: dcArgDouble (vm, (DCdouble) atof (argv[5+i-sig] )); break;
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156 case DC_SIGCHAR_POINTER: dcArgPointer (vm, (DCpointer) argv[5+i-sig] ); break;
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157 case DC_SIGCHAR_STRING: dcArgPointer (vm, (DCpointer) argv[5+i-sig] ); break;
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158 }
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159 ++i;
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160 }
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161
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162 if(*i == DC_SIGCHAR_ENDARG)
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163 ++i;
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164
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165 switch(*i) {
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166 case '\0':
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167 case DC_SIGCHAR_VOID: dcCallVoid (vm,sym) ; break;
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168 case DC_SIGCHAR_BOOL: printf("%d\n", dcCallBool (vm,sym)); break;
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169 case DC_SIGCHAR_CHAR: printf("%d\n", dcCallChar (vm,sym)); break;
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170 case DC_SIGCHAR_UCHAR: printf("%d\n", dcCallChar (vm,sym)); break;
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171 case DC_SIGCHAR_SHORT: printf("%d\n", dcCallShort (vm,sym)); break;
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172 case DC_SIGCHAR_USHORT: printf("%d\n", dcCallShort (vm,sym)); break;
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173 case DC_SIGCHAR_INT: printf("%d\n", dcCallInt (vm,sym)); break;
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174 case DC_SIGCHAR_UINT: printf("%d\n", dcCallInt (vm,sym)); break;
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40
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175 case DC_SIGCHAR_LONG: printf("%ld\n", dcCallLong (vm,sym)); break;
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176 case DC_SIGCHAR_ULONG: printf("%ld\n", dcCallLong (vm,sym)); break;
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0
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177 case DC_SIGCHAR_LONGLONG: printf("%lld\n", dcCallLongLong(vm,sym)); break;
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178 case DC_SIGCHAR_ULONGLONG: printf("%lld\n", dcCallLongLong(vm,sym)); break;
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179 case DC_SIGCHAR_FLOAT: printf("%g\n", dcCallFloat (vm,sym)); break;
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180 case DC_SIGCHAR_DOUBLE: printf("%g\n", dcCallDouble (vm,sym)); break;
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40
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181 case DC_SIGCHAR_POINTER: printf("%p\n", dcCallPointer (vm,sym)); break;
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182 case DC_SIGCHAR_STRING: printf("%s", dcCallPointer (vm,sym)); break;
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0
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183 }
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184
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185 dlFreeLibrary(dlLib);
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186 dcFree(vm);
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187 }
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188
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189 return 0;
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190 }
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191
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