This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding Linux
manual page for details of Linux behavior), or the interface may not be
implemented on Linux.
posix_spawnattr_getsigmask, posix_spawnattr_setsigmask — get and set the
spawn-sigmask attribute of a spawn attributes object (ADVANCED
int posix_spawnattr_getsigmask(const posix_spawnattr_t *restrict attr,
sigset_t *restrict sigmask);
int posix_spawnattr_setsigmask(posix_spawnattr_t *restrict attr,
const sigset_t *restrict sigmask);
The posix_spawnattr_getsigmask() function shall obtain the value of the
spawn-sigmask attribute from the attributes object referenced by
The posix_spawnattr_setsigmask() function shall set the
spawn-sigmask attribute in an initialized attributes object
referenced by attr.
The spawn-sigmask attribute represents the signal mask in
effect in the new process image of a spawn operation (if
POSIX_SPAWN_SETSIGMASK is set in the spawn-flags attribute). The
default value of this attribute is unspecified.
Upon successful completion, posix_spawnattr_getsigmask() shall return
zero and store the value of the spawn-sigmask attribute of attr
into the object referenced by the sigmask parameter; otherwise, an
error number shall be returned to indicate the error.
Upon successful completion, posix_spawnattr_setsigmask()
shall return zero; otherwise, an error number shall be returned to indicate
These functions may fail if:
- The value specified by attr is invalid.
The posix_spawnattr_setsigmask() function may fail if:
- The value of the attribute being set is not valid.
The following sections are informative.
These functions are part of the Spawn option and need not be provided on all
The Base Definitions volume of POSIX.1‐2017,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1-2017, Standard for Information Technology -- Portable Operating
System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018
Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see