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siginterrupt(S-osr5)


siginterrupt -- allow signals to interrupt system calls

Syntax

cc . . . -lc
int siginterrupt(int sig, int flag);

Description

siginterrupt is used to change the system call restart behavior when a system call is interrupted by the specified signal. If the flag is false (0), then system calls will be restarted if they are interrupted by the specified signal and no data has been transferred yet.

If the flag is true (1), then restarting of system calls is disabled. If a system call is interrupted by the specified signal and no data has been transferred, the system call will return -1 with errno set to EINTR. Interrupted system calls that have started transferring data will return the amount of data actually transferred.

Issuing a siginterrupt call during the execution of a signal handler will cause the new action to take place on the next signal to be caught.

Return values

A 0 value indicates that the call succeeded. A -1 value indicates that an invalid signal number has been supplied.

Diagnostics

If the following condition occurs, the siginterrupt function returns -1 and sets errno to the corresponding value:

[EINVAL]
The specified sig was invalid.

Files


/lib/libc.a
linking library

See also

signal(M), signal(S-osr5), sigsetv(S-osr5)

Standards conformance

siginterrupt is conformant with:

AT&T SVID Issue 3.


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SCO OpenServer Release 6.0.0 -- 02 June 2005