User's Manual
by
Gregory Nutt
-
Last Updated: November 29, 2014
+Last Updated: April 9, 2015
@@ -4487,14 +4487,19 @@ interface of the same name.+Function Prototype: +
+ #include <signal.h> + int sigignore(int signo); ++ +
+Description: The sigignore() function will set the disposition of signo to SIG_IGN.
+
+Input Parameters: +
signo. The signal number to act on
++Returned Value: +
ERROR) is returned with the errno value of EINVAL, for example, would indicate that signo argument is not a valid signal number.
++Function Prototype: +
+ #include <signal.h> + void (*sigset(int signo, void (*disp)(int)))(int); ++ +
+Description:
+ The sigset() function will modify signal dispositions.
+ The signo argument specifies the signal.
+ The disp argument specifies the signal's disposition, which may be SIG_DFL, SIG_IGN, or the address of a signal handler.
+ If disp is the address of a signal handler, the system will add signo to the calling process' signal mask before executing the signal handler; when the signal handler returns, the system will restore the calling process' signal mask to its state prior to the delivery of the signal.
+ signo will be removed from the calling process' signal mask.
+
+ NOTE: The value SIG_HOLD for disp is not currently supported.
+
+Input Parameters: +
signo. The signal number to operate on
+disp. The new disposition of the signal
++Returned Value: +
sigset() will the previous disposition of the signal.
+Otherwise, SIG_ERR will be returned and errno set to indicate the error.
+
Function Prototype:
@@ -4779,7 +4842,55 @@ pointed to by the set input parameter.
POSIX Compatibility: Comparable to the POSIX
interface of the same name.
-
+Function Prototype: +
+ #include <signal.h> + int sighold(int signo); ++ +
+Description: The sighold() function will add signo to the calling process' signal mask
+
+Input Parameters: +
signo. Identifies the signal to be blocked.
++Returned Value: +
ERROR) is returned with the errno value of EINVAL, for example, would indicate that signo argument is not a valid signal number.
++Function Prototype: +
+ #include <signal.h> + int sigrelse(int signo); ++ +
+Description: The sighold() function will remove signo from the calling process' signal mask
+
+Input Parameters: +
signo. Identifies the signal to be unblocked.
++Returned Value: +
ERROR) is returned with the errno value of EINVAL, for example, would indicate that signo argument is not a valid signal number.
+Function Prototype: @@ -4817,7 +4928,7 @@ is delivered more than once." POSIX Compatibility: Comparable to the POSIX interface of the same name. -
Function Prototype: @@ -4865,7 +4976,30 @@ function or to terminate the task." Only delivery of the signal is required in the present implementation (even if the signal is ignored). -
+Function Prototype: +
+ #include <signal.h> + int sigpause(int signo); ++ +
+Description: The sigpause()) function will remove signo) from the calling process' signal mask and suspend the calling process until a signal is received.
+The sigpause()) function will restore the process' signal mask to its original state before returning.
+
+Input Parameters: +
set. Identifies the signal to be unblocked while waiting.
++Returned Value: +
sigpause always returns -1 (ERROR). On a successful wait for a signal, the errno will be set to EINTR.
+Function Prototype: @@ -4894,10 +5028,9 @@ with a NULL timeout parameter. (see below).
Assumptions/Limitations:
- POSIX Compatibility: Comparable to the POSIX -interface of the same name. + POSIX Compatibility: Comparable to the POSIX interface of the same name. -
Function Prototype: @@ -4963,7 +5096,7 @@ that the unblocked signal be caught; the task will be resumed even if the unblocked signal is ignored. -
Function Prototype: @@ -5020,7 +5153,7 @@ There is no null signal in the present implementation; a zero signal will be sent. -
Function Prototype: @@ -5076,7 +5209,7 @@ be sent.
Function Prototype: