From 2cb7e0aaedad73b076ea18c6900b0e86c5760d79 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 15:00:47 +0200 Subject: Adding upstream version 247.3. Signed-off-by: Daniel Baumann --- src/basic/dlfcn-util.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/basic/dlfcn-util.c (limited to 'src/basic/dlfcn-util.c') diff --git a/src/basic/dlfcn-util.c b/src/basic/dlfcn-util.c new file mode 100644 index 0000000..2dbff0e --- /dev/null +++ b/src/basic/dlfcn-util.c @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "dlfcn-util.h" + +int dlsym_many_and_warn(void *dl, int level, ...) { + va_list ap; + int r; + + /* Tries to resolve a bunch of function symbols, and logs errors about the ones it cannot + * resolve. Note that this function possibly modifies the supplied function pointers if the whole + * operation fails */ + + va_start(ap, level); + + for (;;) { + void (**fn)(void); + void (*tfn)(void); + const char *symbol; + + fn = va_arg(ap, typeof(fn)); + if (!fn) + break; + + symbol = va_arg(ap, typeof(symbol)); + + tfn = (typeof(tfn)) dlsym(dl, symbol); + if (!tfn) { + r = log_full_errno(level, + SYNTHETIC_ERRNO(ELIBBAD), + "Can't find symbol %s: %s", symbol, dlerror()); + va_end(ap); + return r; + } + + *fn = tfn; + } + + va_end(ap); + return 0; +} -- cgit v1.2.3