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Diffstat (limited to 'contrib/global/lib/usable.c')
-rw-r--r-- | contrib/global/lib/usable.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/contrib/global/lib/usable.c b/contrib/global/lib/usable.c new file mode 100644 index 000000000000..af8dd0ab0fbb --- /dev/null +++ b/contrib/global/lib/usable.c @@ -0,0 +1,70 @@ +/* + * Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Shigio Yamaguchi. + * 4. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * usable.c 22-Jun-98 + * + */ +#include <assert.h> +#include <stdlib.h> +#include <string.h> + +#include "locatestring.h" +#include "gparam.h" +#include "makepath.h" +#include "test.h" +#include "usable.h" + +/* + * usable: check executable or not about the command. + * + * i) command + * r) 1: executable + * 0: non executable + */ +int +usable(command) +char *command; +{ + char buf[MAXENVLEN+1], *p, *dir; + + if (*command == '/' || locatestring(command, "./", MATCH_AT_FIRST) || locatestring(command, "../", MATCH_AT_FIRST)) + return test("fx", command); + + strcpy(buf, getenv("PATH")); + p = buf; + while (p) { + dir = p; + if ((p = locatestring(p, ":", MATCH_FIRST)) != NULL) + *p++ = 0; + if (test("fx", makepath(dir, command))) + return 1; + } + return 0; +} |