usr.bin/objformat/objformat.c

   1 /*-
   2  * Copyright (c) 2004, The DragonFly Project.  All rights reserved.
   3  * Copyright (c) 1998, Peter Wemm <peter@netplex.com.au>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/usr.bin/objformat/objformat.c,v 1.6 1998/10/24 02:01:30 jdp Exp $
  28  * $DragonFly: src/usr.bin/objformat/objformat.c,v 1.22 2007/08/09 22:15:22 corecode Exp $
  29  */
  30
  31 #include <err.h>
  32 #include <objformat.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <unistd.h>
  37
  38 #ifndef CCVER_DEFAULT
  39 #define CCVER_DEFAULT "gcc41"
  40 #endif
  41
  42 #ifndef BINUTILSVER_DEFAULT
  43 #define BINUTILSVER_DEFAULT "binutils217"
  44 #endif
  45
  46 #define OBJFORMAT       0
  47 #define COMPILER        1
  48 #define BINUTILS1       2
  49 #define BINUTILS2       3
  50
  51 #define arysize(ary)    (sizeof(ary)/sizeof((ary)[0]))
  52
  53 struct command {
  54         const char *cmd;
  55         int type;
  56 };
  57
  58 static struct command commands[] = {
  59         {"CC",          COMPILER},
  60         {"c++",         COMPILER},
  61         {"c++filt",     COMPILER},
  62         {"cc",          COMPILER},
  63         {"cpp",         COMPILER},
  64         {"f77",         COMPILER},
  65         {"g77",         COMPILER},
  66         {"g++",         COMPILER},
  67         {"gcc",         COMPILER},
  68         {"gcov",        COMPILER},
  69         {"addr2line",   BINUTILS2},
  70         {"ar",          BINUTILS2},
  71         {"as",          BINUTILS2},
  72         {"gasp",        BINUTILS2},
  73         {"gdb",         BINUTILS2},
  74         {"ld",          BINUTILS2},
  75         {"nm",          BINUTILS2},
  76         {"objcopy",     BINUTILS2},
  77         {"objdump",     BINUTILS2},
  78         {"ranlib",      BINUTILS2},
  79         {"size",        BINUTILS2},
  80         {"strings",     BINUTILS2},
  81         {"strip",       BINUTILS2},
  82         {"objformat",   OBJFORMAT}
  83 };
  84
  85 int
  86 main(int argc, char **argv)
  87 {
  88         struct command *cmds;
  89         char objformat[32];
  90         char *path, *chunk;
  91         char *cmd, *newcmd = NULL;
  92         const char *objformat_path;
  93         const char *ccver;
  94         const char *buver;
  95         const char *env_value = NULL;
  96         const char *base_path = NULL;
  97         int use_objformat = 0;
  98
  99         if (getobjformat(objformat, sizeof objformat, &argc, argv) == -1)
 100                 errx(1, "Invalid object format");
 101
 102         /*
 103          * Get the last path elemenet of the program name being executed
 104          */
 105         cmd = strrchr(argv[0], '/');
 106         if (cmd != NULL)
 107                 cmd++;
 108         else
 109                 cmd = argv[0];
 110
 111         for (cmds = commands; cmds < &commands[arysize(commands)]; ++cmds) {
 112                 if (strcmp(cmd, cmds->cmd) == 0)
 113                         break;
 114         }
 115
 116         if ((ccver = getenv("CCVER")) == NULL || ccver[0] == 0)
 117                 ccver = CCVER_DEFAULT;
 118         if ((buver = getenv("BINUTILSVER")) == NULL) {
 119                 buver = BINUTILSVER_DEFAULT;
 120         }
 121
 122         if (cmds) {
 123                 switch (cmds->type) {
 124                 case COMPILER:
 125                         base_path = "/usr/libexec";
 126                         use_objformat = 0;
 127                         env_value = ccver;
 128                         break;
 129                 case BINUTILS2:
 130                         use_objformat = 1;
 131                         /* fall through */
 132                 case BINUTILS1:
 133                         env_value = buver;
 134                         base_path = "/usr/libexec";
 135                         break;
 136                 case OBJFORMAT:
 137                         break;
 138                 default:
 139                         err(1, "unknown command type");
 140                         break;
 141                 }
 142         }
 143
 144         /*
 145          * The objformat command itself doesn't need another exec
 146          */
 147         if (cmds->type == OBJFORMAT) {
 148                 if (argc != 1) {
 149                         fprintf(stderr, "Usage: objformat\n");
 150                         exit(1);
 151                 }
 152
 153                 printf("%s\n", objformat);
 154                 exit(0);
 155         }
 156
 157         /*
 158          * make buildworld glue and CCVER overrides.
 159          */
 160         objformat_path = getenv("OBJFORMAT_PATH");
 161         if (objformat_path == NULL)
 162                 objformat_path = "";
 163
 164         path = strdup(objformat_path);
 165
 166         if (setenv("OBJFORMAT", objformat, 1) == -1)
 167                 err(1, "setenv: cannot set OBJFORMAT=%s", objformat);
 168
 169         /*
 170          * objformat_path could be sequence of colon-separated paths.
 171          */
 172         while ((chunk = strsep(&path, ":")) != NULL) {
 173                 if (newcmd != NULL) {
 174                         free(newcmd);
 175                         newcmd = NULL;
 176                 }
 177                 if (use_objformat) {
 178                         asprintf(&newcmd, "%s%s/%s/%s/%s",
 179                                 chunk, base_path, env_value, objformat, cmd);
 180                 } else {
 181                         asprintf(&newcmd, "%s%s/%s/%s",
 182                                 chunk, base_path, env_value, cmd);
 183                 }
 184                 if (newcmd == NULL)
 185                         err(1, "cannot allocate memory");
 186
 187                 argv[0] = newcmd;
 188                 execv(newcmd, argv);
 189         }
 190         if (use_objformat) {
 191                 err(1, "in path [%s]%s/%s/%s/%s",
 192                         objformat_path, base_path, env_value, objformat, cmd);
 193         } else {
 194                 err(1, "in path [%s]%s/%s/%s",
 195                         objformat_path, base_path, env_value, cmd);
 196         }
 197 }
 198