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- add a bit more documentation to vodz' recent additions.

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This commit is contained in:
Bernhard Reutner-Fischer 2005-10-05 12:23:13 +00:00
parent 35939d9378
commit 43fb3fcb2f
1 changed files with 26 additions and 8 deletions
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34
libbb/getopt_ulflags.c
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@ -110,21 +110,32 @@ const char *bb_opt_complementally
bb_getopt_ulflags's return value will be as if "-a -b -c" were
found.
"ww" Double option have int counter usaging. For example ps applet:
"ww" Adjacent double options have a counter associated which indicates
the number of occurances of the option. For example the ps applet needs:
if w is given once, GNU ps sets the width to 132,
if w is given more than once, it is "unlimited"
int w_counter = 0;
bb_opt_complementally = "ww";
flags = bb_getopt_ulflags(argc, argv, "w", &w_counter);
bb_getopt_ulflags(argc, argv, "w", &w_counter);
if((flags & 1))
if(w_counter)
width = (w_counter == 1) ? 132 : INT_MAX;
else
get_terminal_width(...&width...);
w_counter - have counter -w usaging, must set int pointer
to bb_getopt_ulflags() after all other requires
w_counter is a pointer to an integer. It has to be passed to
bb_getopt_ulflags() after all other option argument sinks.
For example: accept multiple -v to indicate the level of verbosity and
for each -b optarg, add optarg to my_b. Finally, if b is given, turn off
c and vice versa:
llist_t *my_b = NULL;
int verbose_level = 0;
bb_opt_complementally = "vvb*b-c:c-b";
bb_getopt_ulflags(argc, argv, "vb:c", &my_b, &verbose_level);
while (my_b) { dosomething_with(my_b->data) ; my_b = my_b->link; }
if (verbose_level) bb_printf("verbose\n");
Special characters:
@ -155,6 +166,16 @@ Special characters:
if(opt & 4)
printf("Detected odd -x usaging\n");
"-" A minus as the first char in a bb_opt_complementally group means to
convert the arguments as option.
For example:
bb_opt_complementally = "-:w";
bb_getopt_ulflags(argc, argv, "w");
Allows option 'w' to be given without a dash (./program w)
as well as with a dash (./program -w).
"~" A tilde 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
@ -175,9 +196,6 @@ Special characters:
"!" If previous point set BB_GETOPT_ERROR, don`t return and call
previous example internally
"-" A minus as one char in bb_opt_complementally group means that
convert the arguments as option, specail for "ps" applet.
"*" A star after a char in bb_opt_complementally means that the
option can occur multiple times: