kc3-lang/gnulib/lib/progname.c

• Show log

  Commit

• Hash : 36726b13
  Author :
  Date : 2025-09-05T13:04:09
  

  progname: static check instead of dynamic
  
  * lib/progname.c: Don’t include stdio.h or stdlib.h.
  (set_program_name): Omit dynamic check that (with current glibc
  optimization) drags in fwrite even when unlocked I/O is wanted.
  The check was not all that useful in practice and we now have a
  static one anyway (which admittedly is not that useful either).
  Prefer memcmp to strncmp when equivalent, for clarity.
  * lib/progname.h: Include arg-nonnull.h and declare
  set_program_name with _GL_ARG_NONNULL.
  * modules/progname (Depends-on): Add snippet/arg-nonnull.
  

Download

• lib/progname.c

• /* Program name management.
     Copyright (C) 2001-2003, 2005-2025 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 <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.  */
    char const *slash = strrchr (argv0, '/');
    char const *base = slash ? slash + 1 : argv0;
    if (7 <= base - argv0 && memcmp (base - 7, "/.libs/", 7) == 0)
      {
        argv0 = base;
        if (strncmp (base, "lt-", 3) == 0)
          {
            base += 3;
            argv0 = base;
          }
      }
  
    /* 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
  #if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
    program_invocation_short_name = (char *) base;
  #endif
  }
  

Download