tools/winegcc/utils.c

   1 /*
   2  * Useful functions for winegcc
   3  *
   4  * Copyright 2000 Francois Gouget
   5  * Copyright 2002 Dimitrie O. Paun
   6  * Copyright 2003 Richard Cohen
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdarg.h>
  28 #include <stdlib.h>
  29 #include <errno.h>
  30
  31 #include "utils.h"
  32
  33 int verbose = 0;
  34
  35 void error(const char* s, ...)
  36 {
  37     va_list ap;
  38
  39     va_start(ap, s);
  40     fprintf(stderr, "winegcc: ");
  41     vfprintf(stderr, s, ap);
  42     va_end(ap);
  43     exit(2);
  44 }
  45
  46 void create_file(const char* name, int mode, const char* fmt, ...)
  47 {
  48     va_list ap;
  49     FILE *file;
  50
  51     if (verbose) printf("Creating file %s\n", name);
  52     va_start(ap, fmt);
  53     if ( !(file = fopen(name, "w")) )
  54         error("Unable to open %s for writing\n", name);
  55     vfprintf(file, fmt, ap);
  56     va_end(ap);
  57     fclose(file);
  58     chmod(name, mode);
  59 }
  60
  61 file_type get_file_type(const char* filename)
  62 {
  63     /* see tools/winebuild/res32.c: check_header for details */
  64     static const char res_sig[] = { 0,0,0,0, 32,0,0,0, 0xff,0xff, 0,0, 0xff,0xff, 0,0, 0,0,0,0, 0,0, 0,0, 0,0,0,0, 0,0,0,0 };
  65     static const char elf_sig[4] = "\177ELF";
  66     char buf[sizeof(res_sig)];
  67     int fd, cnt;
  68
  69     fd = open( filename, O_RDONLY );
  70     if (fd == -1) return file_na;
  71     cnt = read(fd, buf, sizeof(buf));
  72     close( fd );
  73     if (cnt == -1) return file_na;
  74
  75     if (cnt == sizeof(res_sig) && !memcmp(buf, res_sig, sizeof(res_sig))) return file_res;
  76     if (strendswith(filename, ".o")) return file_obj;
  77     if (strendswith(filename, ".obj")) return file_obj;
  78     if (strendswith(filename, ".a")) return file_arh;
  79     if (strendswith(filename, ".res")) return file_res;
  80     if (strendswith(filename, ".so")) return file_so;
  81     if (strendswith(filename, ".dylib")) return file_so;
  82     if (strendswith(filename, ".def")) return file_def;
  83     if (strendswith(filename, ".spec")) return file_spec;
  84     if (strendswith(filename, ".rc")) return file_rc;
  85     if (cnt >= sizeof(elf_sig) && !memcmp(buf, elf_sig, sizeof(elf_sig))) return file_so;  /* ELF lib */
  86     if (cnt >= sizeof(unsigned int) &&
  87         (*(unsigned int *)buf == 0xfeedface || *(unsigned int *)buf == 0xcefaedfe ||
  88          *(unsigned int *)buf == 0xfeedfacf || *(unsigned int *)buf == 0xcffaedfe))
  89         return file_so; /* Mach-O lib */
  90
  91     return file_other;
  92 }
  93
  94 static char* try_lib_path(const char* dir, const char* pre,
  95                           const char* library, const char* ext,
  96                           file_type expected_type)
  97 {
  98     char *fullname;
  99     file_type type;
 100
 101     /* first try a subdir named from the library we are looking for */
 102     fullname = strmake("%s/%s/%s%s%s", dir, library, pre, library, ext);
 103     if (verbose > 1) fprintf(stderr, "Try %s...", fullname);
 104     type = get_file_type(fullname);
 105     if (verbose > 1) fprintf(stderr, type == expected_type ? "FOUND!\n" : "no\n");
 106     if (type == expected_type) return fullname;
 107     free( fullname );
 108
 109     fullname = strmake("%s/%s%s%s", dir, pre, library, ext);
 110     if (verbose > 1) fprintf(stderr, "Try %s...", fullname);
 111     type = get_file_type(fullname);
 112     if (verbose > 1) fprintf(stderr, type == expected_type ? "FOUND!\n" : "no\n");
 113     if (type == expected_type) return fullname;
 114     free( fullname );
 115     return 0;
 116 }
 117
 118 static file_type guess_lib_type(enum target_platform platform, const char* dir,
 119                                 const char* library, const char *prefix, const char *suffix, char** file)
 120 {
 121     if (platform != PLATFORM_WINDOWS && platform != PLATFORM_MINGW && platform != PLATFORM_CYGWIN)
 122     {
 123         /* Unix shared object */
 124         if ((*file = try_lib_path(dir, prefix, library, ".so", file_so)))
 125             return file_so;
 126
 127         /* Mach-O (Darwin/Mac OS X) Dynamic Library behaves mostly like .so */
 128         if ((*file = try_lib_path(dir, prefix, library, ".dylib", file_so)))
 129             return file_so;
 130
 131         /* Windows DLL */
 132         if ((*file = try_lib_path(dir, prefix, library, ".def", file_def)))
 133             return file_dll;
 134     }
 135
 136     /* static archives */
 137     if ((*file = try_lib_path(dir, prefix, library, suffix, file_arh)))
 138         return file_arh;
 139
 140     return file_na;
 141 }
 142
 143 file_type get_lib_type(enum target_platform platform, struct strarray path, const char *library,
 144                        const char *prefix, const char *suffix, char** file)
 145 {
 146     unsigned int i;
 147
 148     if (!suffix) suffix = ".a";
 149     for (i = 0; i < path.count; i++)
 150     {
 151         file_type type = guess_lib_type(platform, path.str[i], library, prefix, suffix, file);
 152         if (type != file_na) return type;
 153     }
 154     return file_na;
 155 }
 156
 157 const char *find_binary( struct strarray prefix, const char *name )
 158 {
 159     char *file_name, *args;
 160     struct strarray dirs = empty_strarray;
 161     static struct strarray path;
 162     unsigned int i;
 163
 164     if (strchr( name, '/' )) return name;
 165
 166     file_name = xstrdup( name );
 167     if ((args = strchr( file_name, ' ' ))) *args++ = 0;
 168
 169     if (!path.count) strarray_addall( &path, strarray_frompath( getenv( "PATH" )));
 170
 171     strarray_addall( &dirs, prefix );
 172     strarray_addall( &dirs, path );
 173     for (i = 0; i < dirs.count; i++)
 174     {
 175         struct stat st;
 176         char *prog = strmake( "%s/%s%s", dirs.str[i], file_name, EXEEXT );
 177         if (stat( prog, &st ) == 0 && S_ISREG( st.st_mode ) && (st.st_mode & 0111))
 178             return args ? strmake( "%s %s", prog, args ) : prog;
 179         free( prog );
 180     }
 181     return NULL;
 182 }
 183
 184 int spawn(struct strarray prefix, struct strarray args, int ignore_errors)
 185 {
 186     int status;
 187
 188     args.str[0] = find_binary( prefix, args.str[0] );
 189     if (verbose) strarray_trace( args );
 190
 191     if ((status = strarray_spawn( args )) && !ignore_errors)
 192     {
 193         if (status > 0) error("%s failed\n", args.str[0]);
 194         else perror("winegcc");
 195         exit(3);
 196     }
 197
 198     return status;
 199 }