8ad10c91e9
worlds, as when the first arg (which should be the format) contains no % conversions, and there are more args, the results are unspecified (according to POSIX). We can use this so the previous usage printf -- format arg... (which is stupid, and pointless, but used to work) continues to simply ignore the -- (unspecified results mean we can do whatever feels good...) This brings back the #if 0'd block from the previous modification (so there is no longer anything that needs cleaning up later) but runs the getopt() loop it contained only when there are at least 2 args (so any 1 arg printf always uses that arg as the format string, whatever it contains, including just "--") and also only when the first (format) arg contains no '%' characters (which guarantees no % conversions without needing to actually parse the arg). This is the (or a) "unspecified results" case from POSIX, so we are free to do anything we like - including assuming that we might have options (we don't) and pretending to process them. |
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| Makefile | ||
| printf.1 | ||
| printf.c | ||