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34403: refine 34399 to avoid settyinfo() when the input descriptor is not a TTY

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Barton E. Schaefer 2015-01-26 18:47:29 -08:00
parent cae0be3af6
commit 5751de7975
2 changed files with 7 additions and 2 deletions
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4
Src/utils.c
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@ -2300,8 +2300,8 @@ read_poll(int fd, int *readchar, int polltty, zlong microseconds)
struct ttyinfo ti;
#endif
if (fd < 0)
polltty = 0; /* no tty to poll */
if (fd < 0 || (polltty && !isatty(fd)))
polltty = 0; /* no tty to poll */
#if defined(HAS_TIO) && !defined(__CYGWIN__)
/*