1 /* Relocating wrapper program.
2 Copyright (C) 2003, 2005-2007, 2009-2011 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2003.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
35 Macros that need to be set while compiling this file:
36 - ENABLE_RELOCATABLE 1
37 - INSTALLPREFIX the base installation directory
38 - INSTALLDIR the directory into which this program is installed
39 - LIBPATHVAR the platform dependent runtime library path variable
40 - LIBDIRS a comma-terminated list of strings representing the list of
41 directories that contain the libraries at installation time
43 We don't want to internationalize this wrapper because then it would
44 depend on libintl and therefore need relocation itself. So use only
45 libc functions, no gettext(), no error(), no xmalloc(), no xsetenv().
48 #define _GL_USE_STDLIB_ALLOC 1
58 #include "relocatable.h"
62 /* Use the system functions, not the gnulib overrides in this file. */
65 /* Return a copy of the filename, with an extra ".bin" at the end.
66 More generally, it replaces "${EXEEXT}" at the end with ".bin${EXEEXT}". */
68 add_dotbin (const char *filename)
70 size_t filename_len = strlen (filename);
71 char *result = (char *) malloc (filename_len + 4 + 1);
75 if (sizeof (EXEEXT) > sizeof (""))
77 /* EXEEXT handling. */
78 const size_t exeext_len = sizeof (EXEEXT) - sizeof ("");
79 static const char exeext[] = EXEEXT;
80 if (filename_len > exeext_len)
82 /* Compare using an inlined copy of c_strncasecmp(), because
83 the filenames may have undergone a case conversion since
84 they were packaged. In other words, EXEEXT may be ".exe"
85 on one system and ".EXE" on another. */
86 const char *s1 = filename + filename_len - exeext_len;
87 const char *s2 = exeext;
88 for (; *s1 != '\0'; s1++, s2++)
90 unsigned char c1 = *s1;
91 unsigned char c2 = *s2;
92 if (c_tolower (c1) != c_tolower (c2))
95 /* Insert ".bin" before EXEEXT or its equivalent. */
96 memcpy (result, filename, filename_len - exeext_len);
97 memcpy (result + filename_len - exeext_len, ".bin", 4);
98 memcpy (result + filename_len - exeext_len + 4,
99 filename + filename_len - exeext_len,
105 /* Simply append ".bin". */
106 memcpy (result, filename, filename_len);
107 memcpy (result + filename_len, ".bin", 4 + 1);
112 fprintf (stderr, "%s: %s\n", program_name, "memory exhausted");
117 /* List of directories that contain the libraries. */
118 static const char *libdirs[] = { LIBDIRS NULL };
119 /* Verify that at least one directory is given. */
120 verify (sizeof (libdirs) / sizeof (libdirs[0]) > 1);
122 /* Relocate the list of directories that contain the libraries. */
128 for (i = 0; i < sizeof (libdirs) / sizeof (libdirs[0]) - 1; i++)
129 libdirs[i] = relocate (libdirs[i]);
132 /* Activate the list of directories in the LIBPATHVAR. */
136 const char *old_value;
142 old_value = getenv (LIBPATHVAR);
143 if (old_value == NULL)
147 for (i = 0; i < sizeof (libdirs) / sizeof (libdirs[0]) - 1; i++)
148 total += strlen (libdirs[i]) + 1;
149 total += strlen (old_value) + 1;
151 value = (char *) malloc (total);
154 fprintf (stderr, "%s: %s\n", program_name, "memory exhausted");
158 for (i = 0; i < sizeof (libdirs) / sizeof (libdirs[0]) - 1; i++)
160 size_t len = strlen (libdirs[i]);
161 memcpy (p, libdirs[i], len);
165 if (old_value[0] != '\0')
166 strcpy (p, old_value);
170 if (setenv (LIBPATHVAR, value, 1) < 0)
172 fprintf (stderr, "%s: %s\n", program_name, "memory exhausted");
178 main (int argc, char *argv[])
180 char *full_program_name;
182 /* Set the program name and perform preparations for
183 get_full_program_name() and relocate(). */
184 set_program_name_and_installdir (argv[0], INSTALLPREFIX, INSTALLDIR);
186 /* Get the full program path. (Important if accessed through a symlink.) */
187 full_program_name = get_full_program_name ();
188 if (full_program_name == NULL)
189 full_program_name = argv[0];
191 /* Invoke the real program, with suffix ".bin". */
192 argv[0] = add_dotbin (full_program_name);
195 execv (argv[0], argv);
196 fprintf (stderr, "%s: could not execute %s: %s\n",
197 program_name, argv[0], strerror (errno));