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18 lines
465 B
C
18 lines
465 B
C
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#include <machine/syscall.h>
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#include <sys/stat.h>
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#include "internal_syscall.h"
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extern int _fstat(int file, struct stat *st);
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/* Query whether output stream is a terminal. For consistency with the
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other minimal implementations, which only support output to stdout,
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this minimal implementation is suggested by the newlib docs. */
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int
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_isatty(int file)
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{
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struct stat s;
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int ret = _fstat (file, &s);
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return ret == -1 ? -1 : !!(s.st_mode & S_IFCHR);
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}
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