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build: patch
plugin_loader.c to use an internal strlcpy impl
Signed-off-by: Leonardo Grasso <me@leonardograsso.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| diff --git a/pkg/loader/plugin_loader.c b/pkg/loader/plugin_loader.c | ||
| index aad119f..169f696 100644 | ||
| --- a/pkg/loader/plugin_loader.c | ||
| +++ b/pkg/loader/plugin_loader.c | ||
| @@ -23,23 +23,53 @@ limitations under the License. | ||
| typedef void* library_handle_t; | ||
| #endif | ||
|
|
||
| -#include "strlcpy.h" | ||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
| #include "plugin_loader.h" | ||
|
|
||
| +// note(jasondellaluce,therealbobo): implementation taken from falcosecurity/libs | ||
| +// note(leogr): to avoid clashing with `strlcpy` introduced by glibc 2.38, | ||
| +// the func has been renamed to plugin_loader_strlcpy. | ||
| +// N.B.: our building system here is not smart enough to detect if the function | ||
| +// was declared already. | ||
| +#include <stdint.h> | ||
| +#include <string.h> | ||
| +/*! | ||
| + \brief Copy up to size - 1 characters from the NUL-terminated string src to dst, NUL-terminating the result. | ||
| + | ||
| + \return The length of the source string. | ||
| +*/ | ||
| + | ||
| +static inline size_t plugin_loader_strlcpy(char *dst, const char *src, size_t size) { | ||
| + size_t srcsize = strlen(src); | ||
| + if (size == 0) { | ||
| + return srcsize; | ||
| + } | ||
| + | ||
| + size_t copysize = srcsize; | ||
| + | ||
| + if (copysize > size - 1) { | ||
| + copysize = size - 1; | ||
| + } | ||
| + | ||
| + memcpy(dst, src, copysize); | ||
| + dst[copysize] = '\0'; | ||
| + | ||
| + return srcsize; | ||
| +} | ||
| + | ||
| static inline void err_prepend(char* s, const char* prefix, const char* sep) | ||
| { | ||
| char tmp[PLUGIN_MAX_ERRLEN]; | ||
| - size_t prefix_len = strlcpy(tmp, prefix, PLUGIN_MAX_ERRLEN); | ||
| + size_t prefix_len = plugin_loader_strlcpy(tmp, prefix, PLUGIN_MAX_ERRLEN); | ||
| if (*s != '\0') | ||
| { | ||
| - strlcpy(&tmp[prefix_len], sep, PLUGIN_MAX_ERRLEN - prefix_len); | ||
| + plugin_loader_strlcpy(&tmp[prefix_len], sep, PLUGIN_MAX_ERRLEN - prefix_len); | ||
| prefix_len += strlen(sep); | ||
| } | ||
| - strlcpy(&tmp[prefix_len], s, PLUGIN_MAX_ERRLEN - prefix_len); | ||
| - strlcpy(s, tmp, PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(&tmp[prefix_len], s, PLUGIN_MAX_ERRLEN - prefix_len); | ||
| + plugin_loader_strlcpy(s, tmp, PLUGIN_MAX_ERRLEN); | ||
| } | ||
|
|
||
| static inline void err_append(char* s, const char* suffix, const char* sep) | ||
| @@ -71,7 +101,7 @@ plugin_handle_t* plugin_load(const char* path, char* err) | ||
| plugin_handle_t* ret = (plugin_handle_t*) calloc (1, sizeof(plugin_handle_t)); | ||
| if (!ret) | ||
| { | ||
| - strlcpy(err, "error allocating plugin handle", PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, "error allocating plugin handle", PLUGIN_MAX_ERRLEN); | ||
| return NULL; | ||
| } | ||
|
|
||
| @@ -86,7 +116,7 @@ plugin_handle_t* plugin_load(const char* path, char* err) | ||
| LPTSTR msg_buf = 0; | ||
| if (FormatMessageA(flg, 0, GetLastError(), 0, (LPTSTR) &msg_buf, 0, NULL) && msg_buf) | ||
| { | ||
| - strlcpy(err, msg_buf, PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, msg_buf, PLUGIN_MAX_ERRLEN); | ||
| LocalFree(msg_buf); | ||
| } | ||
| } | ||
| @@ -94,7 +124,7 @@ plugin_handle_t* plugin_load(const char* path, char* err) | ||
| ret->handle = dlopen(path, RTLD_LAZY); | ||
| if (ret->handle == NULL) | ||
| { | ||
| - strlcpy(err, (const char*) dlerror(), PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, (const char*) dlerror(), PLUGIN_MAX_ERRLEN); | ||
| } | ||
| #endif | ||
|
|
||
| @@ -143,14 +173,14 @@ plugin_handle_t* plugin_load_api(const plugin_api* api, char* err) | ||
| err[0] = '\0'; | ||
| if (!api) | ||
| { | ||
| - strlcpy(err, "can't allocate plugin handle with invalid API table", PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, "can't allocate plugin handle with invalid API table", PLUGIN_MAX_ERRLEN); | ||
| return NULL; | ||
| } | ||
|
|
||
| plugin_handle_t* ret = (plugin_handle_t*) calloc (1, sizeof(plugin_handle_t)); | ||
| if (!ret) | ||
| { | ||
| - strlcpy(err, "error allocating plugin handle", PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, "error allocating plugin handle", PLUGIN_MAX_ERRLEN); | ||
| return NULL; | ||
| } | ||
| ret->api = *api; | ||
| @@ -203,7 +233,7 @@ bool plugin_check_required_api_version(const plugin_handle_t* h, char* err) | ||
| const char *ver, *failmsg; | ||
| if (h->api.get_required_api_version == NULL) | ||
| { | ||
| - strlcpy(err, "plugin_get_required_api_version symbol not implemented", PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, "plugin_get_required_api_version symbol not implemented", PLUGIN_MAX_ERRLEN); | ||
| return false; | ||
| } | ||
|
|
||
| @@ -243,7 +273,7 @@ bool plugin_check_required_api_version(const plugin_handle_t* h, char* err) | ||
| plugin_caps_t plugin_get_capabilities(const plugin_handle_t* h, char* err) | ||
| { | ||
| plugin_caps_t caps = CAP_NONE; | ||
| - strlcpy(err, "", PLUGIN_MAX_ERRLEN); | ||
| + plugin_loader_strlcpy(err, "", PLUGIN_MAX_ERRLEN); | ||
|
|
||
| if (h->api.open != NULL && h->api.close != NULL && h->api.next_batch != NULL) | ||
| { |