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49b19567 LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
3 | #include "dlfcn-util.h" | |
4 | ||
5 | int dlsym_many_and_warn(void *dl, int level, ...) { | |
6 | va_list ap; | |
7 | int r; | |
8 | ||
9 | /* Tries to resolve a bunch of function symbols, and logs errors about the ones it cannot | |
10 | * resolve. Note that this function possibly modifies the supplied function pointers if the whole | |
11 | * operation fails */ | |
12 | ||
13 | va_start(ap, level); | |
14 | ||
15 | for (;;) { | |
16 | void (**fn)(void); | |
17 | void (*tfn)(void); | |
18 | const char *symbol; | |
19 | ||
20 | fn = va_arg(ap, typeof(fn)); | |
21 | if (!fn) | |
22 | break; | |
23 | ||
24 | symbol = va_arg(ap, typeof(symbol)); | |
25 | ||
26 | tfn = (typeof(tfn)) dlsym(dl, symbol); | |
27 | if (!tfn) { | |
28 | r = log_full_errno(level, | |
29 | SYNTHETIC_ERRNO(ELIBBAD), | |
30 | "Can't find symbol %s: %s", symbol, dlerror()); | |
31 | va_end(ap); | |
32 | return r; | |
33 | } | |
34 | ||
35 | *fn = tfn; | |
36 | } | |
37 | ||
38 | va_end(ap); | |
39 | return 0; | |
40 | } |