58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "alloc-util.h"
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#include "dlfcn-util.h"
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#include "pcre2-dlopen.h"
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#if HAVE_PCRE2
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static void *pcre2_dl = NULL;
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pcre2_match_data* (*sym_pcre2_match_data_create)(uint32_t, pcre2_general_context *);
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void (*sym_pcre2_match_data_free)(pcre2_match_data *);
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void (*sym_pcre2_code_free)(pcre2_code *);
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pcre2_code* (*sym_pcre2_compile)(PCRE2_SPTR, PCRE2_SIZE, uint32_t, int *, PCRE2_SIZE *, pcre2_compile_context *);
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int (*sym_pcre2_get_error_message)(int, PCRE2_UCHAR *, PCRE2_SIZE);
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int (*sym_pcre2_match)(const pcre2_code *, PCRE2_SPTR, PCRE2_SIZE, PCRE2_SIZE, uint32_t, pcre2_match_data *, pcre2_match_context *);
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PCRE2_SIZE* (*sym_pcre2_get_ovector_pointer)(pcre2_match_data *);
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int dlopen_pcre2(void) {
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_cleanup_(dlclosep) void *dl = NULL;
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int r;
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if (pcre2_dl)
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return 0; /* Already loaded */
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dl = dlopen("libpcre2-8.so.0", RTLD_LAZY);
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if (!dl)
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return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
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"PCRE2 support is not installed: %s", dlerror());
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r = dlsym_many_and_warn(
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dl,
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LOG_ERR,
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&sym_pcre2_match_data_create, "pcre2_match_data_create_8",
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&sym_pcre2_match_data_free, "pcre2_match_data_free_8",
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&sym_pcre2_code_free, "pcre2_code_free_8",
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&sym_pcre2_compile, "pcre2_compile_8",
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&sym_pcre2_get_error_message, "pcre2_get_error_message_8",
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&sym_pcre2_match, "pcre2_match_8",
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&sym_pcre2_get_ovector_pointer, "pcre2_get_ovector_pointer_8",
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NULL);
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if (r < 0)
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return r;
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/* Note that we never release the reference here, because there's no real reason to, after all this
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* was traditionally a regular shared library dependency which lives forever too. */
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pcre2_dl = TAKE_PTR(dl);
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return 1;
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}
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#else
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int dlopen_pcre2(void) {
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return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
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"PCRE2 support is not compiled in.");
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}
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#endif
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