33 lines
574 B
C
33 lines
574 B
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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#include "system.h"
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int
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sys_lock(path)
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char *path;
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{
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char buf[1024];
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char *tmpf = ".lockXXXXXX";
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char *strrchr(), *strcpy(), *mktemp();
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char *p;
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int ok, fd;
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strcpy(buf, path);
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if (p = strrchr(buf, '/')) {
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++p;
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strcpy(p, tmpf);
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}
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else
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strcpy(buf, tmpf);
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mktemp(buf);
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if ((fd = creat(buf, 0)) < 0)
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return 0;
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close(fd);
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ok = (link(buf, path) == 0);
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unlink(buf);
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return ok;
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}
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