From 5e45211a64149b3c659b90ff2de6fa982a5a93ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 14:17:33 +0200 Subject: Adding upstream version 15.5. Signed-off-by: Daniel Baumann --- src/interfaces/libpq/legacy-pqsignal.c | 57 ++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 src/interfaces/libpq/legacy-pqsignal.c (limited to 'src/interfaces/libpq/legacy-pqsignal.c') diff --git a/src/interfaces/libpq/legacy-pqsignal.c b/src/interfaces/libpq/legacy-pqsignal.c new file mode 100644 index 0000000..db470df --- /dev/null +++ b/src/interfaces/libpq/legacy-pqsignal.c @@ -0,0 +1,57 @@ +/*------------------------------------------------------------------------- + * + * legacy-pqsignal.c + * reliable BSD-style signal(2) routine stolen from RWW who stole it + * from Stevens... + * + * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * + * IDENTIFICATION + * src/interfaces/libpq/legacy-pqsignal.c + * + *------------------------------------------------------------------------- + */ +#include "postgres_fe.h" + +#include + + +/* + * This version of pqsignal() exists only because pre-9.3 releases + * of libpq exported pqsignal(), and some old client programs still + * depend on that. (Since 9.3, clients are supposed to get it from + * libpgport instead.) + * + * Because it is only intended for backwards compatibility, we freeze it + * with the semantics it had in 9.2; in particular, this has different + * behavior for SIGALRM than the version in src/port/pqsignal.c. + * + * libpq itself uses this only for SIGPIPE (and even then, only in + * non-ENABLE_THREAD_SAFETY builds), so the incompatibility isn't + * troublesome for internal references. + */ +pqsigfunc +pqsignal(int signo, pqsigfunc func) +{ +#ifndef WIN32 + struct sigaction act, + oact; + + act.sa_handler = func; + sigemptyset(&act.sa_mask); + act.sa_flags = 0; + if (signo != SIGALRM) + act.sa_flags |= SA_RESTART; +#ifdef SA_NOCLDSTOP + if (signo == SIGCHLD) + act.sa_flags |= SA_NOCLDSTOP; +#endif + if (sigaction(signo, &act, &oact) < 0) + return SIG_ERR; + return oact.sa_handler; +#else /* WIN32 */ + return signal(signo, func); +#endif +} -- cgit v1.2.3