York Sun wrote: > From: James Yang <james.y...@freescale.com> > > getenv_f() searches the environment for a variable name and copies the > value of the variable to a buffer pointed to by one of the function's > parameters. However, this means that the buffer needs to exist and > needs to be of sufficient length (passed as another parameter to > getenv_f()) to hold the requested variable's value, even if all that is > desired is the mere detection of the existence of the variable itself. > > This patch removes the requirement that the buffer needs to exist. If > the pointer to the buffer is set to NULL and the requested variable is > found, getenv_f() returns 1, else it returns -1. The buffer length > parameter is ignored if the pointer is set to NULL. The original > functionality of getenv_f() is retained (return number of bytes copied > if variable is found, -1 if not), other than being able to copy the > variable's value to the address 0. > > Signed-off-by: James Yang <james.y...@freescale.com>
Acked-by: Timur Tabi <ti...@freescale.com> -- Timur Tabi Linux kernel developer at Freescale _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
