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fs/vfs: provide link fallback without softlinks

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Build fs_link.c unconditionally so link() remains available even when
CONFIG_PSEUDOFS_SOFTLINKS is disabled. Return ENOSYS in that
configuration instead of leaving applications with an undefined symbol.

Signed-off-by: Felipe Moura <moura.fmo@gmail.com>
This commit is contained in:
Felipe Moura 2026-06-24 16:50:15 -03:00 • committed by Xiang Xiao
parent 2b17b0c992
commit 3aa3c21504
3 changed files with 16 additions and 16 deletions
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5
fs/vfs/CMakeLists.txt
View file

@ -51,7 +51,8 @@ set(SRCS
fs_dir.c
fs_fsync.c
fs_syncfs.c
fs_truncate.c)
fs_truncate.c
fs_link.c)
# File notify support
@ -66,7 +67,7 @@ if(NOT "${CONFIG_FS_LOCK_BUCKET_SIZE}" STREQUAL "0")
endif()
if(NOT "${CONFIG_PSEUDOFS_SOFTLINKS}" STREQUAL "0")
list(APPEND SRCS fs_link.c fs_symlink.c fs_readlink.c)
list(APPEND SRCS fs_symlink.c fs_readlink.c)
endif()
# Pseudofile support

4
fs/vfs/Make.defs
View file

@ -27,7 +27,7 @@ CSRCS += fs_epoll.c fs_fchstat.c fs_fstat.c fs_fstatfs.c fs_ioctl.c fs_lseek.c
CSRCS += fs_mkdir.c fs_open.c fs_poll.c fs_pread.c fs_pwrite.c fs_read.c
CSRCS += fs_rename.c fs_rmdir.c fs_select.c fs_sendfile.c fs_stat.c
CSRCS += fs_statfs.c fs_uio.c fs_unlink.c fs_write.c fs_dir.c fs_fsync.c
CSRCS += fs_syncfs.c fs_truncate.c
CSRCS += fs_syncfs.c fs_truncate.c fs_link.c
ifeq ($(CONFIG_FS_NOTIFY),y)
CSRCS += fs_inotify.c
@ -38,7 +38,7 @@ CSRCS += fs_lock.c
endif
ifneq ($(CONFIG_PSEUDOFS_SOFTLINKS),0)
CSRCS += fs_link.c fs_symlink.c fs_readlink.c
CSRCS += fs_symlink.c fs_readlink.c
endif
# Pseudofile support

23
fs/vfs/fs_link.c
View file

@ -26,14 +26,9 @@
#include <nuttx/config.h>
#include <errno.h>
#include <unistd.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_PSEUDOFS_SOFTLINKS
/****************************************************************************
* Public Functions
****************************************************************************/
@ -42,10 +37,8 @@
* Name: link
*
* Description:
* The link function provides a wrapper to symlink. Solely to provide
* compatibility to posix compatibility layer.
*
* See symlink for details on limitations.
* The link function provides a wrapper to symlink when pseudo filesystem
* softlinks are enabled. Otherwise, hard links are unsupported.
*
* Input Parameters:
* path1 - Points to a pathname naming an existing file.
@ -60,7 +53,13 @@
int link(FAR const char *path1, FAR const char *path2)
{
#ifdef CONFIG_PSEUDOFS_SOFTLINKS
return symlink(path1, path2);
}
#else
(void)path1;
(void)path2;
#endif /* CONFIG_PSEUDOFS_SOFTLINKS */
set_errno(ENOSYS);
return ERROR;
#endif
}