nuttx/libs/libc/string/lib_strndup.c

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/****************************************************************************
* libs/libc/string/lib_strndup.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <string.h>
#include "libc.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: strndup
*
* Description:
* The strndup() function is equivalent to the strdup() function,
* duplicating the provided 's' in a new block of memory allocated as
* if by using malloc(), with the exception being that strndup() copies
* at most 'size' plus one bytes into the newly allocated memory,
* terminating the new string with a NUL character. If the length of 's'
* is larger than 'size', only 'size' bytes will be duplicated. If
* 'size' is larger than the length of 's', all bytes in s will be
* copied into the new memory buffer, including the terminating NUL
* character. The newly created string will always be properly
* terminated.
*
****************************************************************************/
#undef strndup /* See mm/README.txt */
FAR char *strndup(FAR const char *s, size_t size)
{
FAR char *news = NULL;
Fix -Werror=nonnull-compare and -Werror=format-truncation= Error: module/mod_insmod.c:203:3: error: 'strncpy' specified bound 16 equals destination size [-Werror=stringop-truncation] 203 | strncpy(modp->modname, modname, MODLIB_NAMEMAX); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ wqueue/kwork_thread.c: In function 'work_start_lowpri': Error: wqueue/kwork_thread.c:212:22: error: '%lx' directive output may be truncated writing between 1 and 16 bytes into a region of size 14 [-Werror=format-truncation=] 212 | snprintf(args, 16, "0x%" PRIxPTR, (uintptr_t)wqueue); local/local_sockif.c: In function 'local_getsockname': Error: local/local_sockif.c:392:11: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=] 392 | strncpy(unaddr->sun_path, conn->lc_path, namelen); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ chip/esp32_wifi_utils.c: In function 'esp_wifi_scan_event_parse': Error: chip/esp32_wifi_utils.c:373:37: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Werror=sizeof-pointer-memaccess] memset(ap_list_buffer, 0x0, sizeof(ap_list_buffer)); ^ stdio/lib_fputs.c: In function 'fputs': Error: stdio/lib_fputs.c:99:9: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ Error: stdio/lib_fputs.c:99:27: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ stdio/lib_vfprintf.c: In function 'vfprintf': Error: stdio/lib_vfprintf.c:40:6: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (stream) ^ string/lib_strdup.c: In function 'strdup': Error: string/lib_strdup.c:39:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strndup.c: In function 'strndup': Error: string/lib_strndup.c:56:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strpbrk.c: In function 'strpbrk': Error: string/lib_strpbrk.c:39:7: error: nonnull argument 'str' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~ Error: string/lib_strpbrk.c:39:15: error: nonnull argument 'charset' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~~~~~ string/lib_strrchr.c: In function 'strrchr': Error: string/lib_strrchr.c:40:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ Error: time/lib_asctimer.c:73:50: error: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 12 [-Werror=format-truncation=] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~ time/lib_asctimer.c:73:21: note: directive argument in the range [-2147481748, 2147483647] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ time/lib_asctimer.c:73:3: note: 'snprintf' output between 17 and 68 bytes into a destination of size 26 snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1900 + tp->tm_year); ~~~~~~~~~~~~~~~~~~~ Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-02-13 00:18:04 +01:00
/* Get the size of the new string (limited to size) */
size_t allocsize = strnlen(s, size);
Fix -Werror=nonnull-compare and -Werror=format-truncation= Error: module/mod_insmod.c:203:3: error: 'strncpy' specified bound 16 equals destination size [-Werror=stringop-truncation] 203 | strncpy(modp->modname, modname, MODLIB_NAMEMAX); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ wqueue/kwork_thread.c: In function 'work_start_lowpri': Error: wqueue/kwork_thread.c:212:22: error: '%lx' directive output may be truncated writing between 1 and 16 bytes into a region of size 14 [-Werror=format-truncation=] 212 | snprintf(args, 16, "0x%" PRIxPTR, (uintptr_t)wqueue); local/local_sockif.c: In function 'local_getsockname': Error: local/local_sockif.c:392:11: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=] 392 | strncpy(unaddr->sun_path, conn->lc_path, namelen); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ chip/esp32_wifi_utils.c: In function 'esp_wifi_scan_event_parse': Error: chip/esp32_wifi_utils.c:373:37: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Werror=sizeof-pointer-memaccess] memset(ap_list_buffer, 0x0, sizeof(ap_list_buffer)); ^ stdio/lib_fputs.c: In function 'fputs': Error: stdio/lib_fputs.c:99:9: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ Error: stdio/lib_fputs.c:99:27: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ stdio/lib_vfprintf.c: In function 'vfprintf': Error: stdio/lib_vfprintf.c:40:6: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (stream) ^ string/lib_strdup.c: In function 'strdup': Error: string/lib_strdup.c:39:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strndup.c: In function 'strndup': Error: string/lib_strndup.c:56:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strpbrk.c: In function 'strpbrk': Error: string/lib_strpbrk.c:39:7: error: nonnull argument 'str' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~ Error: string/lib_strpbrk.c:39:15: error: nonnull argument 'charset' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~~~~~ string/lib_strrchr.c: In function 'strrchr': Error: string/lib_strrchr.c:40:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ Error: time/lib_asctimer.c:73:50: error: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 12 [-Werror=format-truncation=] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~ time/lib_asctimer.c:73:21: note: directive argument in the range [-2147481748, 2147483647] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ time/lib_asctimer.c:73:3: note: 'snprintf' output between 17 and 68 bytes into a destination of size 26 snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1900 + tp->tm_year); ~~~~~~~~~~~~~~~~~~~ Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-02-13 00:18:04 +01:00
/* Allocate the new string, adding 1 for the NUL terminator */
Fix -Werror=nonnull-compare and -Werror=format-truncation= Error: module/mod_insmod.c:203:3: error: 'strncpy' specified bound 16 equals destination size [-Werror=stringop-truncation] 203 | strncpy(modp->modname, modname, MODLIB_NAMEMAX); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ wqueue/kwork_thread.c: In function 'work_start_lowpri': Error: wqueue/kwork_thread.c:212:22: error: '%lx' directive output may be truncated writing between 1 and 16 bytes into a region of size 14 [-Werror=format-truncation=] 212 | snprintf(args, 16, "0x%" PRIxPTR, (uintptr_t)wqueue); local/local_sockif.c: In function 'local_getsockname': Error: local/local_sockif.c:392:11: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=] 392 | strncpy(unaddr->sun_path, conn->lc_path, namelen); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ chip/esp32_wifi_utils.c: In function 'esp_wifi_scan_event_parse': Error: chip/esp32_wifi_utils.c:373:37: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Werror=sizeof-pointer-memaccess] memset(ap_list_buffer, 0x0, sizeof(ap_list_buffer)); ^ stdio/lib_fputs.c: In function 'fputs': Error: stdio/lib_fputs.c:99:9: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ Error: stdio/lib_fputs.c:99:27: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ stdio/lib_vfprintf.c: In function 'vfprintf': Error: stdio/lib_vfprintf.c:40:6: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (stream) ^ string/lib_strdup.c: In function 'strdup': Error: string/lib_strdup.c:39:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strndup.c: In function 'strndup': Error: string/lib_strndup.c:56:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strpbrk.c: In function 'strpbrk': Error: string/lib_strpbrk.c:39:7: error: nonnull argument 'str' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~ Error: string/lib_strpbrk.c:39:15: error: nonnull argument 'charset' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~~~~~ string/lib_strrchr.c: In function 'strrchr': Error: string/lib_strrchr.c:40:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ Error: time/lib_asctimer.c:73:50: error: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 12 [-Werror=format-truncation=] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~ time/lib_asctimer.c:73:21: note: directive argument in the range [-2147481748, 2147483647] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ time/lib_asctimer.c:73:3: note: 'snprintf' output between 17 and 68 bytes into a destination of size 26 snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1900 + tp->tm_year); ~~~~~~~~~~~~~~~~~~~ Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-02-13 00:18:04 +01:00
news = (FAR char *)lib_malloc(allocsize + 1);
if (news)
{
/* Copy the string into the allocated memory and add a NUL
* terminator in any case.
*/
Fix -Werror=nonnull-compare and -Werror=format-truncation= Error: module/mod_insmod.c:203:3: error: 'strncpy' specified bound 16 equals destination size [-Werror=stringop-truncation] 203 | strncpy(modp->modname, modname, MODLIB_NAMEMAX); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ wqueue/kwork_thread.c: In function 'work_start_lowpri': Error: wqueue/kwork_thread.c:212:22: error: '%lx' directive output may be truncated writing between 1 and 16 bytes into a region of size 14 [-Werror=format-truncation=] 212 | snprintf(args, 16, "0x%" PRIxPTR, (uintptr_t)wqueue); local/local_sockif.c: In function 'local_getsockname': Error: local/local_sockif.c:392:11: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=] 392 | strncpy(unaddr->sun_path, conn->lc_path, namelen); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ chip/esp32_wifi_utils.c: In function 'esp_wifi_scan_event_parse': Error: chip/esp32_wifi_utils.c:373:37: error: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Werror=sizeof-pointer-memaccess] memset(ap_list_buffer, 0x0, sizeof(ap_list_buffer)); ^ stdio/lib_fputs.c: In function 'fputs': Error: stdio/lib_fputs.c:99:9: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ Error: stdio/lib_fputs.c:99:27: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (s == NULL || stream == NULL) ^ stdio/lib_vfprintf.c: In function 'vfprintf': Error: stdio/lib_vfprintf.c:40:6: error: nonnull argument 'stream' compared to NULL [-Werror=nonnull-compare] if (stream) ^ string/lib_strdup.c: In function 'strdup': Error: string/lib_strdup.c:39:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strndup.c: In function 'strndup': Error: string/lib_strndup.c:56:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ string/lib_strpbrk.c: In function 'strpbrk': Error: string/lib_strpbrk.c:39:7: error: nonnull argument 'str' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~ Error: string/lib_strpbrk.c:39:15: error: nonnull argument 'charset' compared to NULL [-Werror=nonnull-compare] if (!str || !charset) ^~~~~~~~ string/lib_strrchr.c: In function 'strrchr': Error: string/lib_strrchr.c:40:6: error: nonnull argument 's' compared to NULL [-Werror=nonnull-compare] if (s) ^ Error: time/lib_asctimer.c:73:50: error: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 12 [-Werror=format-truncation=] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~ time/lib_asctimer.c:73:21: note: directive argument in the range [-2147481748, 2147483647] snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ time/lib_asctimer.c:73:3: note: 'snprintf' output between 17 and 68 bytes into a destination of size 26 snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1900 + tp->tm_year); ~~~~~~~~~~~~~~~~~~~ Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-02-13 00:18:04 +01:00
memcpy(news, s, allocsize);
news[allocsize] = '\0';
}
return news;
}