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newlib: implement fsync for the case of CONFIG_VFS_SUPPORT_IO=0

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This feature allows calling fsync even if the vfs component is not
used.
The second part of the commit adds an fsync call in the panic test app
enabling it to be used over usb-serial-jtag.
This commit is contained in:
Ivan Grokhotkov
2022-12-01 13:55:12 +01:00
parent 81d814b42f
commit 35ea136d5a
2 changed files with 19 additions and 0 deletions
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18
components/newlib/syscalls.c
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@@ -73,6 +73,22 @@ static ssize_t _fstat_r_console(struct _reent *r, int fd, struct stat * st)
return -1;
}
static int _fsync_console(int fd)
{
if (fd == STDOUT_FILENO || fd == STDERR_FILENO) {
#ifdef CONFIG_ESP_CONSOLE_UART
esp_rom_uart_flush_tx(CONFIG_ESP_CONSOLE_UART_NUM);
#elif defined(CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG)
esp_rom_uart_flush_tx(CONFIG_ESP_ROM_USB_SERIAL_DEVICE_NUM);
#elif defined(CONFIG_ESP_CONSOLE_USB_CDC)
esp_rom_uart_flush_tx(CONFIG_ESP_ROM_USB_OTG_NUM);
#endif
return 0;
}
errno = EBADF;
return -1;
}
/* The following weak definitions of syscalls will be used unless
* another definition is provided. That definition may come from
@@ -84,6 +100,8 @@ ssize_t _write_r(struct _reent *r, int fd, const void * data, size_t size)
__attribute__((weak,alias("_write_r_console")));
int _fstat_r (struct _reent *r, int fd, struct stat *st)
__attribute__((weak,alias("_fstat_r_console")));
int fsync(int fd)
__attribute__((weak,alias("_fsync_console")));
/* The aliases below are to "syscall_not_implemented", which

1
tools/test_apps/system/panic/main/test_panic.c
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@@ -27,6 +27,7 @@ void die(const char* msg)
{
printf("Test error: %s\n\n", msg);
fflush(stdout);
fsync(fileno(stdout));
usleep(1000);
/* Don't use abort here as it would enter the panic handler */
esp_restart_noos();