1 /* Relocating wrapper program.
2 Copyright (C) 2003, 2005-2007, 2009-2020 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 <https://www.gnu.org/licenses/>. */
37 -> fprintf-posix [ignore, cut dependency tree here]
38 -> strerror [ignore, cut dependency tree here]
41 Macros that need to be set while compiling this file:
42 - ENABLE_RELOCATABLE 1
43 - INSTALLPREFIX the base installation directory
44 - INSTALLDIR the directory into which this program is installed
45 - LIBPATHVAR the platform dependent runtime library path variable
46 - LIBDIRS a comma-terminated list of strings representing the list of
47 directories that contain the libraries at installation time
49 We don't want to internationalize this wrapper because then it would
50 depend on libintl and therefore need relocation itself. So use only
51 libc functions, no gettext(), no error(), no xmalloc(), no xsetenv().
54 #define _GL_USE_STDLIB_ALLOC 1
64 #include "relocatable.h"
68 /* Use the system functions, not the gnulib overrides in this file. */
72 /* Return a copy of the filename, with an extra ".bin" at the end.
73 More generally, it replaces "${EXEEXT}" at the end with ".bin${EXEEXT}". */
75 add_dotbin (const char *filename
)
77 size_t filename_len
= strlen (filename
);
78 char *result
= (char *) malloc (filename_len
+ 4 + 1);
82 if (sizeof (EXEEXT
) > sizeof (""))
84 /* EXEEXT handling. */
85 const size_t exeext_len
= sizeof (EXEEXT
) - sizeof ("");
86 static const char exeext
[] = EXEEXT
;
87 if (filename_len
> exeext_len
)
89 /* Compare using an inlined copy of c_strncasecmp(), because
90 the filenames may have undergone a case conversion since
91 they were packaged. In other words, EXEEXT may be ".exe"
92 on one system and ".EXE" on another. */
93 const char *s1
= filename
+ filename_len
- exeext_len
;
94 const char *s2
= exeext
;
95 for (; *s1
!= '\0'; s1
++, s2
++)
97 unsigned char c1
= *s1
;
98 unsigned char c2
= *s2
;
99 if (c_tolower (c1
) != c_tolower (c2
))
102 /* Insert ".bin" before EXEEXT or its equivalent. */
103 memcpy (result
, filename
, filename_len
- exeext_len
);
104 memcpy (result
+ filename_len
- exeext_len
, ".bin", 4);
105 memcpy (result
+ filename_len
- exeext_len
+ 4,
106 filename
+ filename_len
- exeext_len
,
112 /* Simply append ".bin". */
113 memcpy (result
, filename
, filename_len
);
114 memcpy (result
+ filename_len
, ".bin", 4 + 1);
119 fprintf (stderr
, "%s: %s\n", program_name
, "memory exhausted");
124 /* List of directories that contain the libraries. */
125 static const char *libdirs
[] = { LIBDIRS NULL
};
126 /* Verify that at least one directory is given. */
127 verify (sizeof (libdirs
) / sizeof (libdirs
[0]) > 1);
129 /* Relocate the list of directories that contain the libraries. */
135 for (i
= 0; i
< sizeof (libdirs
) / sizeof (libdirs
[0]) - 1; i
++)
136 libdirs
[i
] = relocate (libdirs
[i
]);
139 /* Activate the list of directories in the LIBPATHVAR. */
143 const char *old_value
;
149 old_value
= getenv (LIBPATHVAR
);
150 if (old_value
== NULL
)
154 for (i
= 0; i
< sizeof (libdirs
) / sizeof (libdirs
[0]) - 1; i
++)
155 total
+= strlen (libdirs
[i
]) + 1;
156 total
+= strlen (old_value
) + 1;
158 value
= (char *) malloc (total
);
161 fprintf (stderr
, "%s: %s\n", program_name
, "memory exhausted");
165 for (i
= 0; i
< sizeof (libdirs
) / sizeof (libdirs
[0]) - 1; i
++)
167 size_t len
= strlen (libdirs
[i
]);
168 memcpy (p
, libdirs
[i
], len
);
172 if (old_value
[0] != '\0')
173 strcpy (p
, old_value
);
177 if (setenv (LIBPATHVAR
, value
, 1) < 0)
179 fprintf (stderr
, "%s: %s\n", program_name
, "memory exhausted");
185 main (int argc
, char *argv
[])
187 char *full_program_name
;
189 /* Set the program name and perform preparations for
190 get_full_program_name() and relocate(). */
191 set_program_name_and_installdir (argv
[0], INSTALLPREFIX
, INSTALLDIR
);
193 /* Get the full program path. (Important if accessed through a symlink.) */
194 full_program_name
= get_full_program_name ();
195 if (full_program_name
== NULL
)
196 full_program_name
= argv
[0];
198 /* Invoke the real program, with suffix ".bin". */
199 argv
[0] = add_dotbin (full_program_name
);
202 execv (argv
[0], argv
);
203 fprintf (stderr
, "%s: could not execute %s: %s\n",
204 program_name
, argv
[0], strerror (errno
));