58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libmes.h>
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char *
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search_path (char const *file_name)
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{
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static char buf[256];
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char *path = getenv ("PATH");
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if (__mes_debug ())
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{
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eputs ("\n search-path: "); eputs (file_name); eputs ("\n");
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}
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while (*path)
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{
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char *end = strchr (path, ':');
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if (!end)
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end = strchr (path, '\0');
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strncpy (buf, path, end - path);
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buf[end - path] = 0;
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if (__mes_debug ())
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{
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eputs (" dir: "); eputs (buf); eputs ("\n");
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}
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if (buf[end - path] != '/')
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strcat (buf, "/");
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strcat (buf, file_name);
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if (!access (buf, X_OK))
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{
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if (__mes_debug ())
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{
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eputs (" found: "); eputs (buf); eputs ("\n");
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}
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return buf;
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}
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path = end + 1;
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}
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return 0;
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}
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