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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/sysmacros.h>
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key_t
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ftok(path, id)
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char *path;
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char id;
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{
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struct stat st;
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return(stat(path, &st) < 0 ? (key_t)-1 :
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(key_t)((key_t)id << 24 | ((long)(unsigned)minor(st.st_dev)) << 16 |
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(unsigned)st.st_ino));
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}
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