1SIGDELSET(3P) POSIX Programmer's Manual SIGDELSET(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 sigdelset - delete a signal from a signal set
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15 #include <signal.h>
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17 int sigdelset(sigset_t *set, int signo);
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21 The sigdelset() function deletes the individual signal specified by
22 signo from the signal set pointed to by set.
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24 Applications should call either sigemptyset() or sigfillset() at least
25 once for each object of type sigset_t prior to any other use of that
26 object. If such an object is not initialized in this way, but is none‐
27 theless supplied as an argument to any of pthread_sigmask(), sigac‐
28 tion(), sigaddset(), sigdelset(), sigismember(), sigpending(), sigproc‐
29 mask(), sigsuspend(), sigtimedwait(), sigwait(), or sigwaitinfo(), the
30 results are undefined.
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33 Upon successful completion, sigdelset() shall return 0; otherwise, it
34 shall return -1 and set errno to indicate the error.
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37 The sigdelset() function may fail if:
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39 EINVAL The signo argument is not a valid signal number, or is an unsup‐
40 ported signal number.
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43 The following sections are informative.
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46 None.
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49 None.
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52 None.
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55 None.
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58 Signal Concepts, sigaction(), sigaddset(), sigemptyset(), sigfillset(),
59 sigismember(), sigpending(), sigprocmask(), sigsuspend(), the Base Def‐
60 initions volume of IEEE Std 1003.1-2001, <signal.h>
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63 Portions of this text are reprinted and reproduced in electronic form
64 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
65 -- Portable Operating System Interface (POSIX), The Open Group Base
66 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
67 Electrical and Electronics Engineers, Inc and The Open Group. In the
68 event of any discrepancy between this version and the original IEEE and
69 The Open Group Standard, the original IEEE and The Open Group Standard
70 is the referee document. The original Standard can be obtained online
71 at http://www.opengroup.org/unix/online.html .
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75IEEE/The Open Group 2003 SIGDELSET(3P)