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The function printfmt
provides the functionality of the standard
function printf
within the context of the VU file system
interface.
int printfmt (int * errn, int fd, char * fmt, ...);
Print formatted output on descriptor fd
.
[See the man page for printf(3)
for a description for format
strings.]
Extensions:
The formatting flag '&' means to read the padding character from the next unused argument. ' ' is the default padding character.
WARNING: The implementation of this function is incomplete. Floating point values are not handled yet, for example.
WARNING: Compilers do not type check the arguments to this function, so it is easy to make mistakes. A type-safe interface for formatted printing is needed for a future release.
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