How do I get the option -10 from command line arguments- “tail -10“. getopt function finds ‘1’ character. But how do I access the string “10”?
If this can be done by getopt_long, an example would help. Thanks.
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How do I get the option -10 from command line arguments- “tail -10“. getopt function finds ‘1’ character. But how do I access the string “10”?
If this can be done by getopt_long, an example would help. Thanks.
Unless you intend for
-1to be an option with0as its argument, the answer is you don’t.getoptis only made for processing options that fit the standard POSIX utilities’ option syntax. It may be possible to use GNUgetopt_longfor this purpose, or you could just write your ownargvparser (it’s easy).Edit: Actually I think I misread what you want. If you want
-followed by any number to be interpreted as an option with that numeric value, I don’t think there’s any version ofgetoptthat will work. There’s no way you can special-case every single number as an option, and if you simply tellgetoptthat all of the digits are option characters that take arguments,-123will be interpreted as a-1option with an argument of23(which is fine, you can interpret it from there), but a lone-1will cause the nextargvelement to geteatenas an argument to-1, which is difficult or impossible to recover from.