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musl
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src
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termios
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tcgetsid.c
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#include
<termios.h>
#include
<sys/ioctl.h>
pid_t
tcgetsid
(
int
fd
)
{
int
sid
;
if
(
ioctl
(
fd
,
TIOCGSID
,
&
sid
)
<
0
)
return
-
1
;
return
sid
;
}