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nshlib: Fix write buffer position in nsh cp command

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The iobuffer for write buffer position need to be update if write
API cannot write data at once.
This commit is contained in:
SPRESENSE 2021-08-19 12:38:13 +09:00 committed by Xiang Xiao
parent 1c3d08a738
commit 8e0892b2f2
1 changed files with 4 additions and 2 deletions
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6
nshlib/nsh_fscmds.c
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@ -587,10 +587,11 @@ int cmd_cp(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
int nbytesread;
int nbyteswritten;
char *iobuffer = vtbl->iobuffer;
do
{
nbytesread = read(rdfd, vtbl->iobuffer, IOBUFFERSIZE);
nbytesread = read(rdfd, iobuffer, IOBUFFERSIZE);
if (nbytesread == 0)
{
/* End of file */
@ -621,10 +622,11 @@ int cmd_cp(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
do
{
nbyteswritten = write(wrfd, vtbl->iobuffer, nbytesread);
nbyteswritten = write(wrfd, iobuffer, nbytesread);
if (nbyteswritten >= 0)
{
nbytesread -= nbyteswritten;
iobuffer += nbyteswritten;
}
else
{