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getrandom: use _NX_XXXX interface to remove cancelation point for kernel

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Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
This commit is contained in:
Petro Karashchenko 2022-06-13 12:07:46 +02:00 committed by Xiang Xiao
parent c7fd1a113f
commit 02682af759
1 changed files with 14 additions and 3 deletions
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17
libs/libc/misc/lib_getrandom.c
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@ -26,6 +26,8 @@
#include <fcntl.h>
#include <unistd.h>
#include <nuttx/fs/fs.h>
/****************************************************************************
* Public Functions
****************************************************************************/
@ -78,14 +80,23 @@ ssize_t getrandom(FAR void *bytes, size_t nbytes, unsigned int flags)
dev = "/dev/urandom";
}
fd = open(dev, oflags);
fd = _NX_OPEN(dev, oflags);
if (fd < 0)
{
_NX_SETERRNO(fd);
return fd;
}
nbytes = read(fd, bytes, nbytes);
close(fd);
nbytes = _NX_READ(fd, bytes, nbytes);
if (nbytes < 0)
{
/* An error occurred on the read. */
_NX_SETERRNO(nbytes);
nbytes = ERROR;
}
_NX_CLOSE(fd);
return nbytes;
}