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newlib: define fcntl as strong symbol

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Closes https://github.com/espressif/esp-idf/issues/3694
Closes https://github.com/espressif/esp-idf/issues/4407
This commit is contained in:
Ivan Grokhotkov 2019-12-10 13:50:04 +01:00 committed by bot
parent 6f0f5d79f9
commit 85656ca77d
3 changed files with 25 additions and 11 deletions
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15
components/newlib/syscalls.c
View file

@ -15,10 +15,12 @@
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <sys/reent.h>
#include <reent.h>
#include <sys/fcntl.h>
int system(const char* str)
@ -65,6 +67,17 @@ void _exit(int __status)
abort();
}
/* Replaces newlib fcntl, which has been compiled without HAVE_FCNTL */
int fcntl(int fd, int cmd, ...)
{
va_list args;
va_start(args, cmd);
int arg = va_arg(args, int);
va_end(args);
struct _reent* r = __getreent();
return _fcntl_r(r, fd, cmd, arg);
}
/* No-op function, used to force linking this file,
instead of the syscalls implementation from libgloss.
*/

11
components/vfs/test/test_vfs_uart.c
View file

@ -202,6 +202,17 @@ TEST_CASE("can write to UART while another task is reading", "[vfs]")
vSemaphoreDelete(write_arg.done);
}
TEST_CASE("fcntl supported in UART VFS", "[vfs]")
{
int flags = fcntl(STDIN_FILENO, F_GETFL, 0);
TEST_ASSERT_NOT_EQUAL(-1, flags);
int res = fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);
TEST_ASSERT_NOT_EQUAL(-1, res);
/* revert */
res = fcntl(STDIN_FILENO, F_SETFL, flags);
TEST_ASSERT_NOT_EQUAL(-1, res);
}
#ifdef CONFIG_VFS_SUPPORT_TERMIOS
TEST_CASE("Can use termios for UART", "[vfs]")
{

10
components/vfs/vfs.c
View file

@ -725,16 +725,6 @@ int _fcntl_r(struct _reent *r, int fd, int cmd, int arg)
return ret;
}
int __attribute__((weak)) fcntl(int fd, int cmd, ...)
{
va_list args;
va_start(args, cmd);
int arg = va_arg(args, int);
va_end(args);
struct _reent* r = __getreent();
return _fcntl_r(r, fd, cmd, arg);
}
int ioctl(int fd, int cmd, ...)
{
const vfs_entry_t* vfs = get_vfs_for_fd(fd);