diff options
Diffstat (limited to 'libbb/getopt32.c')
| -rw-r--r-- | libbb/getopt32.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/libbb/getopt32.c b/libbb/getopt32.c index 3033bf1..bcb7ea6 100644 --- a/libbb/getopt32.c +++ b/libbb/getopt32.c @@ -178,7 +178,7 @@ Special characters: This is typically used to implement "print verbose usage message and exit" option. - "-" A dash between two options causes the second of the two + "a-b" A dash between two options causes the second of the two to be unset (and ignored) if it is given on the command line. [FIXME: what if they are the same? like "x-x"? Is it ever useful?] @@ -204,7 +204,7 @@ Special characters: if (opt & 4) printf("Detected odd -x usage\n"); - "--" A double dash between two options, or between an option and a group + "a--b" 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 are used together. @@ -220,7 +220,7 @@ Special characters: "x--x" Variation of the above, it means that -x option should occur at most once. - "::" A double colon after a char in opt_complementary means that the + "a::" 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*. @@ -240,7 +240,7 @@ Special characters: root:x:0:0:root:/root:/bin/bash user:x:500:500::/home/user:/bin/bash - "?" An "?" between an option and a group of options means that + "a?b" A "?" 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. @@ -259,7 +259,7 @@ Special characters: For example from "start-stop-daemon" applet: // Don't allow -KS -SK, but -S or -K is required - opt_complementary = "K:S:?K--S:S--K"; + opt_complementary = "K:S:K--S:S--K"; flags = getopt32(argv, "KS...); @@ -268,6 +268,7 @@ Special characters: max 3 args; count uses of '-2'; min 2 args; if there is a '-2' option then unset '-3', '-X' and '-a'; if there is a '-2' and after it a '-x' then error out. + But it's far too obfuscated. Use ':' to separate groups. */ /* Code here assumes that 'unsigned' is at least 32 bits wide */ |