diff options
Diffstat (limited to 'libbb/getopt32.c')
| -rw-r--r-- | libbb/getopt32.c | 68 |
1 files changed, 34 insertions, 34 deletions
diff --git a/libbb/getopt32.c b/libbb/getopt32.c index f442933..dddf812 100644 --- a/libbb/getopt32.c +++ b/libbb/getopt32.c @@ -147,6 +147,40 @@ const char *opt_complementary Special characters: + "-" A dash as the first char in a opt_complementary group forces + all arguments to be treated as options, even if they have + no leading dashes. Next char in this case can't be a digit (0-9), + use ':' or end of line. For example: + + opt_complementary = "-:w-x:x-w"; + getopt32(argc, argv, "wx"); + + Allows any arguments to be given without a dash (./program w x) + as well as with a dash (./program -x). + + "--" A double dash at the beginning of opt_complementary means the + argv[1] string should always be treated as options, even if it isn't + prefixed with a "-". This is useful for special syntax in applets + such as "ar" and "tar": + tar xvf foo.tar + + "-N" A dash as the first char in a opt_complementary group followed + by a single digit (0-9) means that at least N non-option + arguments must be present on the command line + + "=N" An equal sign as the first char in a opt_complementary group followed + by a single digit (0-9) means that exactly N non-option + arguments must be present on the command line + + "?N" A "?" as the first char in a opt_complementary group followed + by a single digit (0-9) means that at most N arguments must be present + on the command line. + + "V-" An option with dash before colon or end-of-line results in + bb_show_usage being called if this option is encountered. + This is typically used to implement "print verbose usage message + and exit" option. + "-" A dash between two options causes the second of the two to be unset (and ignored) if it is given on the command line. @@ -173,30 +207,6 @@ Special characters: if (opt & 4) printf("Detected odd -x usage\n"); - "-" A dash as the first char in a opt_complementary group forces - all arguments to be treated as options, even if they have - no leading dashes. Next char in this case can't be a digit (0-9), - use ':' or end of line. For example: - - opt_complementary = "-:w-x:x-w"; - getopt32(argc, argv, "wx"); - - Allows any arguments to be given without a dash (./program w x) - as well as with a dash (./program -x). - - "-N" A dash as the first char in a opt_complementary group followed - by a single digit (0-9) means that at least N non-option - arguments must be present on the command line - - "=N" An equal sign as the first char in a opt_complementary group followed - by a single digit (0-9) means that exactly N non-option - arguments must be present on the command line - - "V-" An option with dash before colon or end-of-line results in - bb_show_usage being called if this option is encountered. - This is typically used to implement "print verbose usage message - and exit" option. - "--" A double dash between two options, or between an option and a group of options, means that they are mutually exclusive. Unlike the "-" case above, an error will be forced if the options @@ -221,10 +231,6 @@ Special characters: if BB_GETOPT_ERROR is detected, don't return, call bb_show_usage and exit instead. Next char after '?' can't be a digit. - "?N" A "?" as the first char in a opt_complementary group followed - by a single digit (0-9) means that at most N arguments must be present - on the command line. - "::" A double colon after a char in opt_complementary means that the option can occur multiple times. Each occurrence will be saved as a llist_t element instead of char*. @@ -245,12 +251,6 @@ Special characters: root:x:0:0:root:/root:/bin/bash user:x:500:500::/home/user:/bin/bash - "--" A double dash at the beginning of opt_complementary means the - argv[1] string should always be treated as options, even if it isn't - prefixed with a "-". This is useful for special syntax in applets - such as "ar" and "tar": - tar xvf foo.tar - "?" An "?" between an option and a group of options means that at least one of them is required to occur if the first option occurs in preceding command line arguments. |