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| author | Michael Brown | 2013-11-07 18:00:51 +0100 |
|---|---|---|
| committer | Michael Brown | 2013-11-07 18:00:51 +0100 |
| commit | 43eba2f555e2a2ed0fbedeeda73dd1720437fd97 (patch) | |
| tree | 86e2decd0adbcb0e92ed8aed80b0b38023e7605a /src/core/parseopt.c | |
| parent | [ipv6] Add IPv6 network device configurator (diff) | |
| download | ipxe-43eba2f555e2a2ed0fbedeeda73dd1720437fd97.tar.gz ipxe-43eba2f555e2a2ed0fbedeeda73dd1720437fd97.tar.xz ipxe-43eba2f555e2a2ed0fbedeeda73dd1720437fd97.zip | |
[cmdline] Generate command option help text automatically
Generate the command option help text automatically from the list of
defined options.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/core/parseopt.c')
| -rw-r--r-- | src/core/parseopt.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/core/parseopt.c b/src/core/parseopt.c index 334ffb2c..d268c059 100644 --- a/src/core/parseopt.c +++ b/src/core/parseopt.c @@ -326,8 +326,25 @@ int parse_parameters ( char *text, struct parameters **params ) { * @v argv Argument list */ void print_usage ( struct command_descriptor *cmd, char **argv ) { - printf ( "Usage:\n\n %s %s\n\nSee http://ipxe.org/cmd/%s for further " - "information\n", argv[0], cmd->usage, argv[0] ); + struct option_descriptor *option; + unsigned int i; + int is_optional; + + printf ( "Usage:\n\n %s", argv[0] ); + for ( i = 0 ; i < cmd->num_options ; i++ ) { + option = &cmd->options[i]; + printf ( " [-%c|--%s", option->shortopt, option->longopt ); + if ( option->has_arg ) { + is_optional = ( option->has_arg == optional_argument ); + printf ( " %s<%s>%s", ( is_optional ? "[" : "" ), + option->longopt, ( is_optional ? "]" : "" ) ); + } + printf ( "]" ); + } + if ( cmd->usage ) + printf ( " %s", cmd->usage ); + printf ( "\n\nSee http://ipxe.org/cmd/%s for further information\n", + argv[0] ); } /** |