path: root/manual/signal.texi
diff options
authorUlrich Drepper <drepper@redhat.com>1997-02-27 06:01:16 +0000
committerUlrich Drepper <drepper@redhat.com>1997-02-27 06:01:16 +0000
commitceb2d9aaa86cc3d3d4accc294751c98d49bdc5c2 (patch)
tree977724555bd3c1007b415b88ed3994e6290f4451 /manual/signal.texi
parent867a8743a42f28c5a50de893c82db66ae215f69c (diff)
update from main archive 970226cvs/libc-970301cvs/libc-970228cvs/libc-970227
1997-02-27 05:12 Ulrich Drepper <drepper@cygnus.com> * manual/Makefile: Add rules to run and distribute xtract-typefun. * manual/xtract-typefun.awk: New file. Script to extract function, variable, macro anchor to put into the `dir' file. * manual/signal.texi: Document difference between SysV and BSD signal(3) function and add documentation for sysv_signal. * sysdeps/libm-i387/e_acoshl.c: Clear upper half of word containing exponent before comparing. 1997-02-27 01:13 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/netinet/in.h (htonl, htons, ntohl, ntohs): Change prototypes to use types with explicit width. `unsigned long' is different on 64 bit systems. * sysdeps/unix/sysv/linux/netinet/in.h: Likewise. * sysdeps/generic/htonl.c: Likewise. * sysdeps/generic/htons.c: Likewise. * sysdeps/generic/ntohl.c: Likewise. * sysdeps/generic/ntohs.c: Likewise. Suggested by a sun <asun@zoology.washington.edu>. 1997-02-26 08:30 Andreas Jaeger <aj@arthur.pfalz.de> * math/math.h: Include <__math.h> if __NO_MATH_INLINES is not defined and we want optimization. 1997-02-27 01:13 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/netinet/in.h (htonl, htons, ntohl, ntohs): Change prototypes to use types with explicit width. `unsigned long' is different on 64 bit systems. Suggested by a sun <asun@zoology.washington.edu>. 1997-02-02 19:53 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * misc/getpass.c: Don't disable canonical input. Reverted patch of Mon Jan 6 01:35:29 1997. 1996-12-14 22:07 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * libio/libioP.h (_IO_finish_t): Take additional parameter, to match the hidden __in_chrg parameter of the destructor. (_IO_FINISH): Pass zero for it. * libio/genops.c (_IO_default_finish): Add second parameter, which is ignored. * libio/memstream.c (_IO_mem_finish): Likewise. * libio/fileops.c (_IO_mem_finish): Likewise. * libio/strops.c (_IO_str_finish): Likewise. All callers changed. 1997-02-27 00:23 H.J. Lu <hjl@lucon.org> * time/Makefile: Avoid using patterns in dependencies. 1997-02-26 00:56 Miguel de Icaza <miguel@nuclecu.unam.mx> * elf/rtld.c: Make _dl_start static. Otherwise the linker on the SPARC will convert the call _dl_start into a call into the PLT. * elf/rtld.c (_dl_start): On the SPARC we need to adjust the value of arg to make it point to the actual values. * sysdeps/sparc/elf/DEFS.h: New ELF specific version. * sysdeps/sparc/Dist: Mention sysdeps/sparc/elf/DEFS.h. * sysdeps/sparc/bsd-_setjmp.S, sysdeps/sparc/bsd-setjmp.S: Make them PIC aware. * sysdeps/sparc/dl-machine.h (elf_machine_load_address): Implemented. (elf_machine_rela): Make it compile; fix existing relocation types; add unhandled relocation types. (ELF_ADJUST_ARG): Get pointer to arguments at program startup. (RTLD_START): Initial implementation, not yet finished. * sysdeps/sparc/elf/start.S: Fix. * sysdeps/sparc/fpu_control.h: Remove duplicate declaration of __setfpucw. * sysdeps/sparc/divrem.m4: Make compilable under Linux. * sysdeps/sparc/rem.S, sysdeps/sparc/sdiv.S, sysdeps/sparc/udiv.S, sysdeps/sparc/urem.S : Regenerated. * sysdeps/sparc/setjmp.S: Make it PIC aware. * sysdeps/unix/sysv/linux/sparc/__sigtrampoline.S: Define __ASSEMBLY__ before using kernel header. * sysdeps/unix/sysv/linux/sparc/Makefile: Use -mv8 flag to compile rtld.c. * sysdeps/unix/sysv/linux/sparc/brk.c: Implement. * sysdeps/unix/sysv/linux/sparc/profil-counter.h: Remove code to handle old signals. * sysdeps/unix/sysv/linux/sparc/sigaction.c: Implements sigaction for all Linux/SPARC kernels. * sysdeps/unix/sysv/linux/sparc/syscall.S: Add code to store errno using __errno_location. * sysdeps/unix/sysv/linux/sparc/sysdep.h: Add various handler macros for assembler sources. * sysdeps/unix/sysv/linux/sparc/errno.c: Define errno. 1997-02-25 16:02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/rtld.c (dl_main): Remove dead code that is never executed. Rename local variable l to main_map where it is used to point to the load_map for the executable. 1997-02-25 15:03 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-version.c (_dl_check_all_versions): Ignore libraries that could not be found. 1997-02-24 23:18 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makerules: Generate implicit object suffix rules automagically. (o-iterator): Move before first use. * Makeconfig (all-object-suffixes): Add .bo suffix. 1997-02-25 15:11 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-i387/e_acoshf.S (__ieee754_acoshf): Test correct word on stack for overflow. C++. Use __exception instead.
Diffstat (limited to 'manual/signal.texi')
1 files changed, 24 insertions, 0 deletions
diff --git a/manual/signal.texi b/manual/signal.texi
index 1a4f8668763..767ddabb410 100644
--- a/manual/signal.texi
+++ b/manual/signal.texi
@@ -1040,6 +1040,18 @@ a handler for @code{SIGKILL} or @code{SIGSTOP}.
@end table
@end deftypefun
+@strong{Compatibility Note:} A problem when working with the
+@code{signal} function is that it has a different semantic on BSD and
+SVID system. The difference is that on SVID systems the signal handler
+is deinstalled after an signal was delivered. On BSD systems the
+handler must be explicitly deinstalled. In the GNU C Library we use the
+BSD version by default. To use the SVID version you can either use the
+function @code{sysv_signal} (see below) or use the @code{_XOPEN_SOURCE}
+feature select macro (@pxref{Feature Test Macros}) Generally it should
+be avoided to use this functions due to the compatibility problems. It
+is better to use @code{sigaction} if it is available since the results
+are much more reliable.
Here is a simple example of setting up a handler to delete temporary
files when certain fatal signals happen:
@@ -1080,6 +1092,18 @@ example because these are designed to provide information for debugging
(a core dump), and the temporary files may give useful information.
@comment signal.h
+@comment GNU
+@deftypefun sighandler_t sysv_signal (int @var{signum}, sighandler_t @var{action})
+The @code{sysv_signal} implements the behaviour of the standard
+@code{signal} function as found on SVID systems. The difference to BSD
+systems is that the handler is deinstalled after a delivery of a signal.
+@strong{Compatibility Note:} As said above for @code{signal}, this
+function should be avoided when possible. @code{sigaction} is the
+preferred method.
+@end deftypefun
+@comment signal.h
@comment SVID
@deftypefun sighandler_t ssignal (int @var{signum}, sighandler_t @var{action})
The @code{ssignal} function does the same thing as @code{signal}; it is