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feat(esp_stdio): add custom IO registration

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This commit is contained in:
Guillaume Souchere
2026-04-28 11:36:30 +02:00
parent 4cf9d611e6
commit 654db440cb
30 changed files with 1093 additions and 220 deletions
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8
components/vfs/CMakeLists.txt
View File

@@ -6,11 +6,13 @@ if(${target} STREQUAL "linux")
set(inc)
set(priv_inc)
list(APPEND inc include)
# linux_include provides stubs (sys/reent.h, dirent.h, errno.h) required by
# esp_vfs.h unconditionally, so expose it for all Linux builds regardless of
# VFS_SUPPORT_IO, which now defaults to n on Linux.
list(APPEND inc include linux_include)
if(CONFIG_VFS_SUPPORT_IO)
list(APPEND inc linux_include)
list(APPEND priv_inc private_include)
list(APPEND srcs "vfs_linux.c" "vfs_linux_default_coop.c" "vfs.c" "vfs_calls.c")
list(APPEND srcs "vfs_linux.c" "vfs_linux_default_coop.c" "vfs.c" "vfs_calls.c" "nullfs.c")
endif()
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")

12
components/vfs/linux_include/dirent.h
View File

@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2025-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -32,10 +32,16 @@ typedef struct {
/**
* @brief Directory entry structure
*
* Fields match the glibc layout so that this header is binary-compatible with
* glibc's readdir() when CONFIG_VFS_SUPPORT_IO is disabled on Linux (in which
* case glibc's readdir() fills the struct, not the VFS wrapper).
*/
struct dirent {
ino_t d_ino; /*!< file number */
uint8_t d_type; /*!< not defined in POSIX, but present in BSD and Linux */
ino_t d_ino; /*!< file number */
off_t d_off; /*!< implementation-defined offset (glibc extension) */
unsigned short d_reclen; /*!< length of this record (glibc extension) */
uint8_t d_type; /*!< not defined in POSIX, but present in BSD and Linux */
#define DT_UNKNOWN 0
#define DT_REG 1
#define DT_DIR 2

4
components/vfs/nullfs.c
View File

@@ -148,7 +148,7 @@ static ssize_t vfs_null_read(__attribute__((unused)) void *ctx, int fd, void *da
return -1;
}
static int vfs_null_pread(__attribute__((unused)) void *ctx, int fd, void *data, size_t size, off_t offset)
static ssize_t vfs_null_pread(__attribute__((unused)) void *ctx, int fd, void *data, size_t size, off_t offset)
{
UNUSED(data);
UNUSED(size);
@@ -165,7 +165,7 @@ static int vfs_null_pread(__attribute__((unused)) void *ctx, int fd, void *data,
}
static int vfs_null_pwrite(__attribute__((unused)) void *ctx, int fd, const void *data, size_t size, off_t offset)
static ssize_t vfs_null_pwrite(__attribute__((unused)) void *ctx, int fd, const void *data, size_t size, off_t offset)
{
UNUSED(data);
UNUSED(offset);