[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Minios-devel] [UNIKRAFT PATCH v2 2/2] lib/vfscore: Add stdin fop
From: Vlad-Andrei BĂDOIU (78692) <vlad_andrei.badoiu@xxxxxxxxxxxxxxx> This patch adds the stdin operation inside lib/vfscore/stdio.c. The stdio is mapped by default to fd 0. This implementation mimics the normal read behaviour.(read until count bytes or read until VEOF or \n is met). The '\r' is replaced with '\n' because ukplat_cink returns '\r' on KVM and Xen. For every successful call of ukplat_cink the input is printed to the stdout. Signed-off-by: Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxxxxxxxxxxx> --- lib/vfscore/stdio.c | 43 ++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 40 insertions(+), 3 deletions(-) diff --git a/lib/vfscore/stdio.c b/lib/vfscore/stdio.c index c631f5f..a9bdfd6 100644 --- a/lib/vfscore/stdio.c +++ b/lib/vfscore/stdio.c @@ -35,19 +35,55 @@ #include <vfscore/file.h> #include <uk/plat/console.h> +#include <uk/essentials.h> +#include <termios.h> /* One function for stderr and stdout */ -static ssize_t stdout_write(struct vfscore_file *vfscore_file, const void *buf, - size_t count) +static ssize_t stdout_write(struct vfscore_file *vfscore_file __unused, + const void *buf, size_t count) { - (void) vfscore_file; return ukplat_coutk(buf, count); } +static ssize_t stdin_read(struct vfscore_file *vfscore_file __unused, + void *_buf, size_t count) +{ + int bytes_read; + size_t bytes_total = 0; + char *buf = (char *)_buf; + + do { + while ((bytes_read = ukplat_cink(buf, + count - bytes_total)) <= 0) + ; + + buf = buf + bytes_read; + *(buf - 1) = *(buf - 1) == '\r' ? + '\n' : *(buf - 1); + + stdout_write(vfscore_file, (buf - bytes_read), + bytes_read); + bytes_total += bytes_read; + + } while (bytes_total < count && *(buf - 1) != '\n' + && *(buf - 1) != VEOF); + + return bytes_total; +} + +static struct vfscore_fops stdin_fops = { + .read = stdin_read, +}; + static struct vfscore_fops stdout_fops = { .write = stdout_write, }; +static struct vfscore_file stdin_file = { + .fd = 0, + .fops = &stdin_fops, +}; + static struct vfscore_file stdout_file = { .fd = 1, .fops = &stdout_fops, @@ -61,6 +97,7 @@ static struct vfscore_file stderr_file = { void init_stdio(void) { + vfscore_install_fd(0, &stdin_file); vfscore_install_fd(1, &stdout_file); vfscore_install_fd(2, &stderr_file); } -- 2.20.1 _______________________________________________ Minios-devel mailing list Minios-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/minios-devel
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