| /* Program name management. |
| Copyright (C) 2001-2003, 2005-2019 Free Software Foundation, Inc. |
| Written by Bruno Haible <bruno@clisp.org>, 2001. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #undef ENABLE_RELOCATABLE /* avoid defining set_program_name as a macro */ |
| #include "progname.h" |
| |
| #include <errno.h> /* get program_invocation_name declaration */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| |
| /* String containing name the program is called with. |
| To be initialized by main(). */ |
| const char *program_name = NULL; |
| |
| /* Set program_name, based on argv[0]. |
| argv0 must be a string allocated with indefinite extent, and must not be |
| modified after this call. */ |
| void |
| set_program_name (const char *argv0) |
| { |
| /* libtool creates a temporary executable whose name is sometimes prefixed |
| with "lt-" (depends on the platform). It also makes argv[0] absolute. |
| But the name of the temporary executable is a detail that should not be |
| visible to the end user and to the test suite. |
| Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here. */ |
| const char *slash; |
| const char *base; |
| |
| /* Sanity check. POSIX requires the invoking process to pass a non-NULL |
| argv[0]. */ |
| if (argv0 == NULL) |
| { |
| /* It's a bug in the invoking program. Help diagnosing it. */ |
| fputs ("A NULL argv[0] was passed through an exec system call.\n", |
| stderr); |
| abort (); |
| } |
| |
| slash = strrchr (argv0, '/'); |
| base = (slash != NULL ? slash + 1 : argv0); |
| if (base - argv0 >= 7 && strncmp (base - 7, "/.libs/", 7) == 0) |
| { |
| argv0 = base; |
| if (strncmp (base, "lt-", 3) == 0) |
| { |
| argv0 = base + 3; |
| /* On glibc systems, remove the "lt-" prefix from the variable |
| program_invocation_short_name. */ |
| #if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME |
| program_invocation_short_name = (char *) argv0; |
| #endif |
| } |
| } |
| |
| /* But don't strip off a leading <dirname>/ in general, because when the user |
| runs |
| /some/hidden/place/bin/cp foo foo |
| he should get the error message |
| /some/hidden/place/bin/cp: `foo' and `foo' are the same file |
| not |
| cp: `foo' and `foo' are the same file |
| */ |
| |
| program_name = argv0; |
| |
| /* On glibc systems, the error() function comes from libc and uses the |
| variable program_invocation_name, not program_name. So set this variable |
| as well. */ |
| #if HAVE_DECL_PROGRAM_INVOCATION_NAME |
| program_invocation_name = (char *) argv0; |
| #endif |
| } |