1GETPT(3)                   Linux Programmer's Manual                  GETPT(3)
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NAME

6       getpt - open the pseudo-terminal master (PTM)
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SYNOPSIS

9       #define _GNU_SOURCE
10       #include <stdlib.h>
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12       int getpt(void);
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DESCRIPTION

15       getpt() opens a pseudo-terminal master and returns its file descriptor.
16       It is equivalent to
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18           open(/dev/ptmx, O_RDWR | O_NOCTTY);
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20       on Linux systems, though the pseudo-terminal master  is  located  else‐
21       where on some systems that use GNU Libc.
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RETURN VALUE

24       getpt()  returns  an  open  file descriptor upon successful completion.
25       Otherwise, it returns -1 and sets errno to indicate the error.
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ERRORS

28       getpt() can fail with various errors described in open(2).
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VERSIONS

31       getpt() is provided in glibc since version 2.1.
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CONFORMING TO

34       getpt() is glibc-specific; use posix_openpt(3) instead.
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SEE ALSO

37       grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)
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COLOPHON

40       This page is part of release 3.22 of the Linux  man-pages  project.   A
41       description  of  the project, and information about reporting bugs, can
42       be found at http://www.kernel.org/doc/man-pages/.
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46GNU                               2008-06-14                          GETPT(3)
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