Added getopt_long command-line handling.
All parameters now have switches. The one gotcha is the parameter which was overloaded - s_length_or_filename to params_readwrite - is only pretending to be a length at the moment. If you pass a filename it'll still work, but the help messages don't mention that. I'll split the parameter into two in a later commit.
This commit is contained in:
Alex Young
449
src/flexnbd.c
449
src/flexnbd.c
@@ -32,75 +32,79 @@
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#include <unistd.h>
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#include <signal.h>
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void syntax()
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#include <getopt.h>
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#include "options.h"
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void exit_err( char *msg )
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{
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fprintf(stderr,
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"Syntax: flexnbd serve <listen IP address> <port> <file> \\\n"
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" [full path to control socket] \\\n"
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" [allowed connection addresses ...]\n"
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" flexnbd read <IP address> <port> <offset> <length> > data\n"
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" flexnbd write <IP address> <port> <offset> <length> < data\n"
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" flexnbd write <IP address> <port> <offset> <file to write>\n"
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" flexnbd acl <control socket> [allowed connection addresses ...]\n"
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" flexnbd mirror <control socket> <dst IP address> <dst port>\n"
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" [bytes per second] [proxy|nothing|exit]"
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" flexnbd status <control socket>\n"
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);
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exit(1);
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fprintf( stderr, msg );
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exit( 1 );
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}
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void params_serve(
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struct mode_serve_params* out,
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char* s_ip_address,
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char* s_port,
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struct mode_serve_params* out,
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char* s_ip_address,
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char* s_port,
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char* s_file,
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char *s_ctrl_sock,
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int acl_entries,
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char** s_acl_entries /* first may actually be path to control socket */
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char** s_acl_entries
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)
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{
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int parsed;
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out->tcp_backlog = 10; /* does this need to be settable? */
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if (s_ip_address == NULL)
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SERVER_ERROR("No IP address supplied");
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if (s_port == NULL)
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SERVER_ERROR("No port number supplied");
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if (s_file == NULL)
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SERVER_ERROR("No filename supplied");
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if (parse_ip_to_sockaddr(&out->bind_to.generic, s_ip_address) == 0)
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SERVER_ERROR("Couldn't parse server address '%s' (use 0 if "
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"you want to bind to all IPs)", s_ip_address);
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out->control_socket_name = NULL;
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if (acl_entries > 0 && s_acl_entries[0][0] == '/') {
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out->control_socket_name = s_acl_entries[0];
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s_acl_entries++;
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acl_entries--;
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}
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/* control_socket_name is optional. It just won't get created if
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* we pass NULL. */
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out->control_socket_name = s_ctrl_sock;
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out->acl_entries = acl_entries;
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parsed = parse_acl(&out->acl, acl_entries, s_acl_entries);
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if (parsed != acl_entries)
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SERVER_ERROR("Bad ACL entry '%s'", s_acl_entries[parsed]);
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out->bind_to.v4.sin_port = atoi(s_port);
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if (out->bind_to.v4.sin_port < 0 || out->bind_to.v4.sin_port > 65535)
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SERVER_ERROR("Port number must be >= 0 and <= 65535");
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out->bind_to.v4.sin_port = htobe16(out->bind_to.v4.sin_port);
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out->filename = s_file;
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out->filename_incomplete = xmalloc(strlen(s_file)+11);
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strcpy(out->filename_incomplete, s_file);
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strcpy(out->filename_incomplete + strlen(s_file), ".INCOMPLETE");
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}
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/* TODO: Separate this function.
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* It should be:
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* params_read( struct mode_readwrite_params* out,
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* char *s_ip_address,
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* char *s_port,
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* char *s_from,
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* char *s_length )
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* params_write( struct mode_readwrite_params* out,
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* char *s_ip_address,
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* char *s_port,
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* char *s_from,
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* char *s_length,
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* char *s_filename )
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*/
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void params_readwrite(
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int write_not_read,
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struct mode_readwrite_params* out,
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char* s_ip_address,
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char* s_ip_address,
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char* s_port,
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char* s_from,
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char* s_length_or_filename
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@@ -114,11 +118,11 @@ void params_readwrite(
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SERVER_ERROR("No from supplied");
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if (s_length_or_filename == NULL)
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SERVER_ERROR("No length supplied");
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if (parse_ip_to_sockaddr(&out->connect_to.generic, s_ip_address) == 0)
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SERVER_ERROR("Couldn't parse connection address '%s'",
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SERVER_ERROR("Couldn't parse connection address '%s'",
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s_ip_address);
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/* FIXME: duplicated from above */
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out->connect_to.v4.sin_port = atoi(s_port);
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if (out->connect_to.v4.sin_port < 0 || out->connect_to.v4.sin_port > 65535)
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@@ -126,7 +130,7 @@ void params_readwrite(
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out->connect_to.v4.sin_port = htobe16(out->connect_to.v4.sin_port);
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out->from = atol(s_from);
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if (write_not_read) {
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if (s_length_or_filename[0]-48 < 10) {
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out->len = atol(s_length_or_filename);
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@@ -157,66 +161,351 @@ void do_read(struct mode_readwrite_params* params);
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void do_write(struct mode_readwrite_params* params);
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void do_remote_command(char* command, char* mode, int argc, char** argv);
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union mode_params {
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void read_serve_param( int c, char **ip_addr, char **ip_port, char **file, char **sock )
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{
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switch(c){
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case 'h':
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fprintf(stdout, serve_help_text );
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exit( 0 );
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break;
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case 'l':
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*ip_addr = optarg;
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break;
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case 'p':
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*ip_port = optarg;
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break;
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case 'f':
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*file = optarg;
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break;
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case 's':
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*sock = optarg;
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break;
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default:
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exit_err( serve_help_text );
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break;
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}
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}
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void read_readwrite_param( int c, char **ip_addr, char **ip_port, char **from, char **size)
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{
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switch(c){
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case 'h':
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fprintf(stdout, read_help_text );
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exit( 0 );
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break;
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case 'l':
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*ip_addr = optarg;
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break;
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case 'p':
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*ip_port = optarg;
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break;
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case 'F':
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*from = optarg;
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break;
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case 'S':
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*size = optarg;
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break;
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default:
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exit_err( read_help_text );
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break;
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}
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}
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void read_sock_param( int c, char **sock, char *help_text )
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{
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switch(c){
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case 'h':
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fprintf( stdout, help_text );
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exit( 0 );
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break;
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case 's':
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*sock = optarg;
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break;
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default:
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exit_err( help_text );
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break;
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}
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}
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void read_acl_param( int c, char **sock )
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{
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read_sock_param( c, sock, acl_help_text );
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}
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void read_mirror_param( int c, char **sock, char **ip_addr, char **ip_port )
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{
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switch( c ){
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case 'h':
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fprintf( stdout, mirror_help_text );
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exit( 0 );
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break;
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case 's':
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*sock = optarg;
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break;
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case 'l':
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*ip_addr = optarg;
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break;
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case 'p':
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*ip_port = optarg;
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break;
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default:
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exit_err( mirror_help_text );
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break;
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}
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}
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void read_status_param( int c, char **sock )
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{
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read_sock_param( c, sock, status_help_text );
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}
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int mode_serve( int argc, char *argv[] )
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{
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int c;
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char *ip_addr = NULL;
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char *ip_port = NULL;
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char *file = NULL;
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char *sock = NULL;
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int err = 0;
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struct mode_serve_params serve;
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while (1) {
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c = getopt_long(argc, argv, serve_short_options, serve_options, NULL);
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if ( c == -1 ) break;
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read_serve_param( c, &ip_addr, &ip_port, &file, &sock );
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}
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if ( NULL == ip_addr || NULL == ip_port ) {
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err = 1;
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fprintf( stderr, "both --addr and --port are required.\n" );
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}
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if ( NULL == file ) {
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err = 1;
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fprintf( stderr, "--file is required\n" );
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}
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if ( err ) { exit_err( serve_help_text ); }
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memset( &serve, 0, sizeof( serve ) );
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params_serve( &serve, ip_addr, ip_port, file, sock, argc - optind, argv + optind );
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do_serve( &serve );
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return 0;
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}
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int mode_read( int argc, char *argv[] )
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{
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int c;
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char *ip_addr = NULL;
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char *ip_port = NULL;
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char *from = NULL;
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char *size = NULL;
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int err = 0;
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struct mode_readwrite_params readwrite;
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};
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while (1){
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c = getopt_long(argc, argv, read_short_options, read_options, NULL);
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if ( c == -1 ) break;
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read_readwrite_param( c, &ip_addr, &ip_port, &from, &size );
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}
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if ( NULL == ip_addr || NULL == ip_port ) {
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err = 1;
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fprintf( stderr, "both --addr and --port are required.\n" );
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}
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if ( NULL == from || NULL == size ) {
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err = 1;
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fprintf( stderr, "both --from and --size are required.\n" );
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}
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if ( err ) { exit_err( read_help_text ); }
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memset( &readwrite, 0, sizeof( readwrite ) );
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params_readwrite( 0, &readwrite, ip_addr, ip_port, from, size );
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do_read( &readwrite );
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return 0;
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}
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int mode_write( int argc, char *argv[] )
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{
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int c;
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char *ip_addr = NULL;
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char *ip_port = NULL;
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char *from = NULL;
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char *size = NULL;
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int err = 0;
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struct mode_readwrite_params readwrite;
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while (1){
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c = getopt_long(argc, argv, write_short_options, write_options, NULL);
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if ( c == -1 ) break;
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read_readwrite_param( c, &ip_addr, &ip_port, &from, &size );
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}
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if ( NULL == ip_addr || NULL == ip_port ) {
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err = 1;
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fprintf( stderr, "both --addr and --port are required.\n" );
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}
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if ( NULL == from || NULL == size ) {
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err = 1;
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fprintf( stderr, "both --from and --size are required.\n" );
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}
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if ( err ) { exit_err( write_help_text ); }
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memset( &readwrite, 0, sizeof( readwrite ) );
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params_readwrite( 1, &readwrite, ip_addr, ip_port, from, size );
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do_write( &readwrite );
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return 0;
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}
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int mode_acl( int argc, char *argv[] )
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{
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int c;
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char *sock = NULL;
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while (1) {
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c = getopt_long( argc, argv, acl_short_options, acl_options, NULL );
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if ( c == -1 ) break;
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read_acl_param( c, &sock );
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}
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if ( NULL == sock ){
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fprintf( stderr, "--sock is required.\n" );
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exit_err( acl_help_text );
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}
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/* Don't use the CMD_ACL macro here, "acl" is the remote command
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* name, not the cli option
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*/
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do_remote_command( "acl", sock, argc - optind, argv + optind );
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return 0;
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}
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int mode_mirror( int argc, char *argv[] )
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{
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int c;
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char *sock = NULL;
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char *remote_argv[3] = {0};
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int err = 0;
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while (1) {
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c = getopt_long( argc, argv, mirror_short_options, mirror_options, NULL);
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if ( -1 == c ) break;
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read_mirror_param( c, &sock, &remote_argv[0], &remote_argv[1] );
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}
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if ( NULL == sock ){
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fprintf( stderr, "--sock is required.\n" );
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err = 1;
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}
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if ( NULL == remote_argv[0] || NULL == remote_argv[1] ) {
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fprintf( stderr, "both --addr and --port are required.\n");
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err = 1;
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}
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if ( err ) { exit_err( mirror_help_text ); }
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do_remote_command( "mirror", sock, 2, remote_argv );
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return 0;
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}
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int mode_status( int argc, char *argv[] )
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{
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int c;
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char *sock = NULL;
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|
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while (1) {
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c = getopt_long( argc, argv, status_short_options, status_options, NULL );
|
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if ( -1 == c ) break;
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read_status_param( c, &sock );
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}
|
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|
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if ( NULL == sock ){
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||||
fprintf( stderr, "--sock is required.\n" );
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exit_err( acl_help_text );
|
||||
}
|
||||
|
||||
do_remote_command( "status", sock, argc - optind, argv + optind );
|
||||
|
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return 0;
|
||||
}
|
||||
|
||||
|
||||
int mode_help( int argc, char *argv[] )
|
||||
{
|
||||
char *cmd;
|
||||
char *help_text;
|
||||
|
||||
if ( argc < 1 ){
|
||||
help_text = help_help_text;
|
||||
} else {
|
||||
cmd = argv[0];
|
||||
if (IS_CMD( CMD_SERVE, cmd ) ) {
|
||||
help_text = serve_help_text;
|
||||
} else if ( IS_CMD( CMD_READ, cmd ) ) {
|
||||
help_text = read_help_text;
|
||||
} else if ( IS_CMD( CMD_WRITE, cmd ) ) {
|
||||
help_text = write_help_text;
|
||||
} else if ( IS_CMD( CMD_ACL, cmd ) ) {
|
||||
help_text = acl_help_text;
|
||||
} else if ( IS_CMD( CMD_MIRROR, cmd ) ) {
|
||||
help_text = mirror_help_text;
|
||||
} else if ( IS_CMD( CMD_STATUS, cmd ) ) {
|
||||
help_text = status_help_text;
|
||||
} else { exit_err( help_help_text ); }
|
||||
}
|
||||
|
||||
fprintf( stdout, help_text );
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void mode(char* mode, int argc, char **argv)
|
||||
{
|
||||
union mode_params params;
|
||||
memset(¶ms, 0, sizeof(params));
|
||||
|
||||
if (strcmp(mode, "serve") == 0) {
|
||||
if (argc >= 3) {
|
||||
params_serve(¶ms.serve, argv[0], argv[1], argv[2], argc-3, argv+3);
|
||||
do_serve(¶ms.serve);
|
||||
}
|
||||
else {
|
||||
syntax();
|
||||
}
|
||||
if ( IS_CMD( CMD_SERVE, mode ) ) {
|
||||
mode_serve( argc, argv );
|
||||
}
|
||||
else if (strcmp(mode, "read") == 0 ) {
|
||||
if (argc == 4) {
|
||||
params_readwrite(0, ¶ms.readwrite, argv[0], argv[1], argv[2], argv[3]);
|
||||
do_read(¶ms.readwrite);
|
||||
}
|
||||
else {
|
||||
syntax();
|
||||
}
|
||||
else if ( IS_CMD( CMD_READ, mode ) ) {
|
||||
mode_read( argc, argv );
|
||||
}
|
||||
else if (strcmp(mode, "write") == 0 ) {
|
||||
if (argc == 4) {
|
||||
params_readwrite(1, ¶ms.readwrite, argv[0], argv[1], argv[2], argv[3]);
|
||||
do_write(¶ms.readwrite);
|
||||
}
|
||||
else {
|
||||
syntax();
|
||||
}
|
||||
else if ( IS_CMD( CMD_WRITE, mode ) ) {
|
||||
mode_write( argc, argv );
|
||||
}
|
||||
else if (strcmp(mode, "acl") == 0 || strcmp(mode, "mirror") == 0 || strcmp(mode, "status") == 0) {
|
||||
if (argc >= 1) {
|
||||
do_remote_command(mode, argv[0], argc-1, argv+1);
|
||||
}
|
||||
else {
|
||||
syntax();
|
||||
}
|
||||
else if ( IS_CMD( CMD_ACL, mode ) ) {
|
||||
mode_acl( argc, argv );
|
||||
}
|
||||
else if ( IS_CMD( CMD_MIRROR, mode ) ) {
|
||||
mode_mirror( argc, argv );
|
||||
}
|
||||
else if ( IS_CMD( CMD_STATUS, mode ) ) {
|
||||
mode_status( argc, argv );
|
||||
}
|
||||
else if ( IS_CMD( CMD_HELP, mode ) ) {
|
||||
mode_help( argc-1, argv+1 );
|
||||
}
|
||||
else {
|
||||
syntax();
|
||||
mode_help( argc-1, argv+1 );
|
||||
exit( 1 );
|
||||
}
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char** argv)
|
||||
{
|
||||
signal(SIGPIPE, SIG_IGN); /* calls to splice() unhelpfully throw this */
|
||||
error_init();
|
||||
|
||||
if (argc < 2)
|
||||
syntax();
|
||||
mode(argv[1], argc-2, argv+2); /* never returns */
|
||||
|
||||
error_init();
|
||||
|
||||
if (argc < 2) {
|
||||
exit_err( help_help_text );
|
||||
}
|
||||
mode(argv[1], argc-1, argv+1); /* never returns */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
126
src/options.h
Normal file
126
src/options.h
Normal file
@@ -0,0 +1,126 @@
|
||||
#define GETOPT_ARG(x,s) {(x), 1, 0, (s)}
|
||||
#define GETOPT_FLAG(x,v) {(x), 0, 0, (v)}
|
||||
|
||||
#define OPT_HELP "help"
|
||||
#define OPT_ADDR "addr"
|
||||
#define OPT_PORT "port"
|
||||
#define OPT_FILE "file"
|
||||
#define OPT_SOCK "sock"
|
||||
#define OPT_FROM "from"
|
||||
#define OPT_SIZE "size"
|
||||
|
||||
#define CMD_SERVE "serve"
|
||||
#define CMD_READ "read"
|
||||
#define CMD_WRITE "write"
|
||||
#define CMD_ACL "acl"
|
||||
#define CMD_MIRROR "mirror"
|
||||
#define CMD_STATUS "status"
|
||||
#define CMD_HELP "help"
|
||||
#define LEN_CMD_MAX 6
|
||||
|
||||
#define PATH_LEN_MAX 1024
|
||||
#define ADDR_LEN_MAX 64
|
||||
|
||||
|
||||
#define IS_CMD(x,c) (strncmp((x),(c),(LEN_CMD_MAX)) == 0)
|
||||
|
||||
static struct option serve_options[] = {
|
||||
GETOPT_FLAG( OPT_HELP, 'h' ),
|
||||
GETOPT_ARG( OPT_ADDR, 'l' ),
|
||||
GETOPT_ARG( OPT_PORT, 'p' ),
|
||||
GETOPT_ARG( OPT_FILE, 'f' ),
|
||||
GETOPT_ARG( OPT_SOCK, 's' ),
|
||||
{0}
|
||||
};
|
||||
static char serve_short_options[] = "hl:p:f:s:";
|
||||
static char serve_help_text[] =
|
||||
"Usage: flexnbd " CMD_SERVE " <options> [<acl address>*]\n\n"
|
||||
"Serve FILE from ADDR:PORT, with an optional control socket at SOCK.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_ADDR ",-l <ADDR>\tThe address to serve on.\n"
|
||||
"\t--" OPT_PORT ",-p <PORT>\tThe port to serve on.\n"
|
||||
"\t--" OPT_FILE ",-f <FILE>\tThe file to serve.\n"
|
||||
"\t--" OPT_SOCK ",-s <SOCK>\tPath to the control socket to open.\n";
|
||||
|
||||
static struct option read_options[] = {
|
||||
GETOPT_FLAG( OPT_HELP, 'h' ),
|
||||
GETOPT_ARG( OPT_ADDR, 'l' ),
|
||||
GETOPT_ARG( OPT_PORT, 'p' ),
|
||||
GETOPT_ARG( OPT_FROM, 'F' ),
|
||||
GETOPT_ARG( OPT_SIZE, 'S' ),
|
||||
{0}
|
||||
};
|
||||
static char read_short_options[] = "hl:p:F:S:";
|
||||
static char read_help_text[] =
|
||||
"Usage: flexnbd " CMD_READ " <options>\n\n"
|
||||
"Read SIZE bytes from a server at ADDR:PORT to stdout, starting at OFFSET.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_ADDR ",-l <ADDR>\tThe address to read from.\n"
|
||||
"\t--" OPT_PORT ",-p <PORT>\tThe port to read from.\n"
|
||||
"\t--" OPT_FROM ",-F <OFFSET>\tByte offset to read from.\n"
|
||||
"\t--" OPT_SIZE ",-S <SIZE>\tBytes to read.\n";
|
||||
|
||||
|
||||
static struct option *write_options = read_options;
|
||||
static char *write_short_options = read_short_options;
|
||||
static char write_help_text[] =
|
||||
"Usage: flexnbd " CMD_WRITE" <options>\n\n"
|
||||
"Write SIZE bytes from stdin to a server at ADDR:PORT, starting at OFFSET.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_ADDR ",-l <ADDR>\tThe address to write to.\n"
|
||||
"\t--" OPT_PORT ",-p <PORT>\tThe port to write to.\n"
|
||||
"\t--" OPT_FROM ",-F <OFFSET>\tByte offset to write from.\n"
|
||||
"\t--" OPT_SIZE ",-S <SIZE>\tBytes to write.\n";
|
||||
|
||||
struct option acl_options[] = {
|
||||
GETOPT_FLAG( OPT_HELP, 'h' ),
|
||||
GETOPT_ARG( OPT_SOCK, 's' ),
|
||||
{0}
|
||||
};
|
||||
static char acl_short_options[] = "hs:";
|
||||
static char acl_help_text[] =
|
||||
"Usage: flexnbd " CMD_ACL " <options> [<acl address>+]\n\n"
|
||||
"Set the access control list for a server with control socket SOCK.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_SOCK ",-s <SOCK>\tPath to the control socket.\n";
|
||||
|
||||
struct option mirror_options[] = {
|
||||
GETOPT_FLAG( OPT_HELP, 'h' ),
|
||||
GETOPT_ARG( OPT_SOCK, 's' ),
|
||||
GETOPT_ARG( OPT_ADDR, 'l' ),
|
||||
GETOPT_ARG( OPT_PORT, 'p' ),
|
||||
{0}
|
||||
};
|
||||
static char mirror_short_options[] = "hs:l:p:";
|
||||
static char mirror_help_text[] =
|
||||
"Usage: flexnbd " CMD_MIRROR " <options>\n\n"
|
||||
"Start mirroring from the server with control socket SOCK to one at ADDR:PORT.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_SOCK ",-s <SOCK>\tPath to the control socket.\n"
|
||||
"\t--" OPT_ADDR ",-l <ADDR>\tThe address to mirror to.\n"
|
||||
"\t--" OPT_PORT ",-p <PORT>\tThe port to mirror to.\n";
|
||||
|
||||
|
||||
struct option status_options[] = {
|
||||
GETOPT_FLAG( OPT_HELP, 'h' ),
|
||||
GETOPT_ARG( OPT_SOCK, 's' ),
|
||||
{0}
|
||||
};
|
||||
static char status_short_options[] = "hs:";
|
||||
static char status_help_text[] =
|
||||
"Usage: flexnbd " CMD_STATUS " <options>\n\n"
|
||||
"Get the status for a server with control socket SOCK.\n\n"
|
||||
"\t--" OPT_HELP ",-h\tThis text.\n"
|
||||
"\t--" OPT_SOCK ",-s <SOCK>\tPath to the control socket.\n";
|
||||
|
||||
static char help_help_text[] =
|
||||
"Usage: flexnbd <cmd> [cmd options]\n\n"
|
||||
"Commands:\n"
|
||||
"\tflexnbd serve\n"
|
||||
"\tflexnbd read\n"
|
||||
"\tflexnbd write\n"
|
||||
"\tflexnbd acl\n"
|
||||
"\tflexnbd mirror\n"
|
||||
"\tflexnbd status\n"
|
||||
"\tflexnbd help\n\n"
|
||||
"See flexnbd help <cmd> for further info\n";
|
||||
Reference in New Issue
Block a user