From 46651ce6fe013220ed397add242004d764fc0153 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 14:15:05 +0200 Subject: Adding upstream version 14.5. Signed-off-by: Daniel Baumann --- src/port/pgstrsignal.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 src/port/pgstrsignal.c (limited to 'src/port/pgstrsignal.c') diff --git a/src/port/pgstrsignal.c b/src/port/pgstrsignal.c new file mode 100644 index 0000000..0f3b5da --- /dev/null +++ b/src/port/pgstrsignal.c @@ -0,0 +1,64 @@ +/*------------------------------------------------------------------------- + * + * pgstrsignal.c + * Identify a Unix signal number + * + * On platforms compliant with modern POSIX, this just wraps strsignal(3). + * Elsewhere, we do the best we can. + * + * This file is not currently built in MSVC builds, since it's useless + * on non-Unix platforms. + * + * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * IDENTIFICATION + * src/port/pgstrsignal.c + * + *------------------------------------------------------------------------- + */ + +#include "c.h" + + +/* + * pg_strsignal + * + * Return a string identifying the given Unix signal number. + * + * The result is declared "const char *" because callers should not + * modify the string. Note, however, that POSIX does not promise that + * the string will remain valid across later calls to strsignal(). + * + * This version guarantees to return a non-NULL pointer, although + * some platforms' versions of strsignal() reputedly do not. + * + * Note that the fallback cases just return constant strings such as + * "unrecognized signal". Project style is for callers to print the + * numeric signal value along with the result of this function, so + * there's no need to work harder than that. + */ +const char * +pg_strsignal(int signum) +{ + const char *result; + + /* + * If we have strsignal(3), use that --- but check its result for NULL. + */ +#ifdef HAVE_STRSIGNAL + result = strsignal(signum); + if (result == NULL) + result = "unrecognized signal"; +#else + + /* + * We used to have code here to try to use sys_siglist[] if available. + * However, it seems that all platforms with sys_siglist[] have also had + * strsignal() for many years now, so that was just a waste of code. + */ + result = "(signal names not available on this platform)"; +#endif + + return result; +} -- cgit v1.2.3