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shell: don't ignore IO errors
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@ -217,6 +217,9 @@ static int readline(shell_t *shell, char *buf, size_t size)
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}
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c = shell->readchar();
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if (c < 0) {
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return 1;
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}
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shell->put_char(c);
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/* We allow Unix linebreaks (\n), DOS linebreaks (\r\n), and Mac linebreaks (\r). */
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@ -53,7 +53,10 @@ static void print_echo(int argc, char **argv)
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static int shell_readc(void)
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{
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char c;
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posix_read(uart0_handler_pid, &c, 1);
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int result = posix_read(uart0_handler_pid, &c, 1);
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if (result != 1) {
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return -1;
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}
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return (unsigned char) c;
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}
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