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