signal.h: sync comment with code, remove trailing whitespace

Expose sigaltstack, stack_t and friends to Posix Issue 5 (200809L) References:

https://man7.org/linux/man-pages/man2/sigaltstack.2.html
https://pubs.opengroup.org/onlinepubs/9699919799/functions/sig

Expose sigaltstack, stack_t and friends to Posix Issue 5 (200809L) References:

https://man7.org/linux/man-pages/man2/sigaltstack.2.html
https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigaltstack.html

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Version the sigaction(2) libc wrapper. The new version uses the "siginfo"
trampoline exclusively, thus relegating "sigcontext"-style handlers (which
have not been documented for many years now) to t

Version the sigaction(2) libc wrapper. The new version uses the "siginfo"
trampoline exclusively, thus relegating "sigcontext"-style handlers (which
have not been documented for many years now) to the dustbin of the compat
library.

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Provide global variables with C linkage, otherwise they will create
conflicts for C++ modules use.

Add the new signalname/signalnext/signalnumber interface to libc.

This as discussed on current-users in the thread
entitled:
Proposal: new libc/libutil functions to map SIGXXXX <-> "XXXX"
that can

Add the new signalname/signalnext/signalnumber interface to libc.

This as discussed on current-users in the thread
entitled:
Proposal: new libc/libutil functions to map SIGXXXX <-> "XXXX"
that can be found (starting at):
http://mail-index.netbsd.org/current-users/2017/04/28/msg031600.html

These functions provide the mechanism to enable applications
to divorce themselves from internal details of the signal
implementation.

Libc minor bumped, prototypes in <signal.h>, sets lists updated (and sorted).

One and all: feel free to improve the sources & man page (etc), but
please do not change the function signatures without discussion.

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Do as POSIX says, define the timespec structure in <signal.h>

Extract struct timespec from <sys/time.h> and put into a separate header.

This solution is minimally invasive.

The signal number argument in psignal is int not unsigned int.
Add psiginfo.

Define a new __c99inline macro for compilers known to implement the C99
behavior. This unbreaks GCC 4.4's libgfortran build with the old
signal.h logic, because GCC decided to put the body for the s

Define a new __c99inline macro for compilers known to implement the C99
behavior. This unbreaks GCC 4.4's libgfortran build with the old
signal.h logic, because GCC decided to put the body for the sigsetop
functions in multiple objects.

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handle the difference between C99 and GNUC semantics of inline
functions with external linkage, by using "inline" for STDC and
"extern inline" for GNUC

(as noted by joerg@, using static inline may b

handle the difference between C99 and GNUC semantics of inline
functions with external linkage, by using "inline" for STDC and
"extern inline" for GNUC

(as noted by joerg@, using static inline may be clearer)

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merge christos-time_t

Add a comment noting that the definition of __errno is now replicated in
signal.h. Per request of joerg@

signal.h is not supposed to define errno, so use ___errno instead.
Adjust errno.h in a compatible fashion to avoid -Wredundant-decls issues.
I have run a build to check the tree for places where errn

signal.h is not supposed to define errno, so use ___errno instead.
Adjust errno.h in a compatible fashion to avoid -Wredundant-decls issues.
I have run a build to check the tree for places where errno.h is missing,
and fixed the cases I found, but there might be more in MD code.

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pthread_sigmask(): Add restrict qualifier to set, oset args.

inline -> __inline for selected things (specifically, the header
file is POSIX visible and the usage isn't #ifdef _KERNEL)

Discussed with core. I may need to go farther than this but for now
compila

inline -> __inline for selected things (specifically, the header
file is POSIX visible and the usage isn't #ifdef _KERNEL)

Discussed with core. I may need to go farther than this but for now
compilations done with gcc -ansi (i.e. firefox) will be okay.

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Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

use __inline as before, otherwise "gcc -ansi" blows up

compat code reorg

Add restrict qualifiers to remaining <signal.h> function arguments.

de-__P -- the hack is long since useless. Discussed with christos,
matt, kleink, others. Approved by christos.

Remove the remains of "struct sigcontext" and sigreturn() from the
user visible namespace.
These weren't supported interfaces for a while (it just happened to
work with COMPAT_16 kernels).
There are

Remove the remains of "struct sigcontext" and sigreturn() from the
user visible namespace.
These weren't supported interfaces for a while (it just happened to
work with COMPAT_16 kernels).
There are still internal uses in compat code and as jmp_buf format,
but this is all md code which uses <machine/signal.h>.
with christos' agreement

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Provide forward struct declarations for struct sigcontext*; this will allow
us to get rid of them in the machine/signal.h files.

Use CPP macros to cause many libpthread functions used by applications
to be transformed into the do-nothing-when-libpthread-isn't-linked libc
stub names. This will permit library code that uses <pth

Use CPP macros to cause many libpthread functions used by applications
to be transformed into the do-nothing-when-libpthread-isn't-linked libc
stub names. This will permit library code that uses <pthread.h> and pthread
functions "defensively" to not need to link against libpthread and not need
to be patched to the threadlib.h API.

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Resolve some namespace protection confusion between XPG4.2 and 5/1003.1b,
making _XOPEN_SOURCE_EXTENDED work again. Fixes PR lib/26077.

Implement sigemptyset() and sigfillset() not as macros but as inline
functions, just like the rest of the sigsetops. From J.T.Conklin
in PR lib/25627; originally prompted to work around problems wit

Implement sigemptyset() and sigfillset() not as macros but as inline
functions, just like the rest of the sigsetops. From J.T.Conklin
in PR lib/25627; originally prompted to work around problems with
an application but also fixing one important bug: per POSIX, these
functions may be additionally implemented as macros, iff they evaluate
their macros only once. This was not the case.

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don't put __libc_sigaction14 under __LIBC12_SOURCE__. It is wrong, because
then we have to define __LIBC12_SOURCE__ from __sigaction14_sigtramp.c and
that has the side effect of redefining struct sig

don't put __libc_sigaction14 under __LIBC12_SOURCE__. It is wrong, because
then we have to define __LIBC12_SOURCE__ from __sigaction14_sigtramp.c and
that has the side effect of redefining struct sigaction to the old one.

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