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improve uart0_puts

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This commit is contained in:
Ludwig Ortmann 2013-08-18 11:21:38 +02:00
parent ca6f20f384
commit 141bec6427
1 changed files with 17 additions and 4 deletions
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21
native/drivers/native-uart0.c
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@ -20,13 +20,26 @@ fd_set _native_uart_rfds;
inline int uart0_puts(char *astring, int length) inline int uart0_puts(char *astring, int length)
{ {
int nwritten, offset;
nwritten = 0;
offset = 0;
_native_in_syscall = 1; _native_in_syscall = 1;
/* XXX: handle short writes: */
if (write(_native_uart_out, astring, length) == -1) { while ((length > 0) &&(nwritten = write(_native_uart_out, astring+offset, length-offset)) > 0) {
err(EXIT_FAILURE, "uart0_puts: write"); offset += nwritten;
return -1;
} }
if (nwritten == -1) {
err(EXIT_FAILURE, "uart0_puts: write");
}
else if ((length > 0) && (nwritten == 0)) {
/* XXX: handle properly */
errx(EXIT_FAILURE, "uart0_puts: Could not write to stdout. I don't know what to do now.");
}
_native_in_syscall = 0; _native_in_syscall = 0;
return length; return length;
} }