14 lines
260 B
C
14 lines
260 B
C
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#include <unistd.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include "syscall.h"
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int isatty(int fd)
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{
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struct winsize wsz;
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unsigned long r = syscall(SYS_ioctl, fd, TIOCGWINSZ, &wsz);
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if (r == 0) return 1;
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if (errno != EBADF) errno = ENOTTY;
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return 0;
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}
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