ftpconf.c

00001 /*
00002  * Parses and prints the configuration options for a fictous ftp client
00003  */
00004 
00005 #include <stdio.h>
00006 #include <string.h>
00007 #include <errno.h>
00008 #include <confuse.h>
00009 
00010 /* valid values for the auto-create-bookmark option */
00011 #define ACB_YES 1
00012 #define ACB_NO 2
00013 #define ACB_ASK 3
00014 
00015 /* called on alias() functions in the config file */
00016 int conf_alias(cfg_t *cfg, cfg_opt_t *opt, int argc, const char **argv)
00017 {
00018     if(argc < 2)
00019     {
00020         cfg_error(cfg, "function '%s' requires 2 arguments", cfg_opt_name(opt));
00021         return -1;
00022     }
00023     printf("got alias '%s' = '%s'\n", argv[0], argv[1]);
00024     return 0;
00025 }
00026 
00027 /* parse values for the auto-create-bookmark option */
00028 int conf_parse_acb(cfg_t *cfg, cfg_opt_t *opt, const char *value, void *result)
00029 {
00030     if(strcmp(value, "yes") == 0)
00031         *(int *)result = ACB_YES;
00032     else if(strcmp(value, "no") == 0)
00033         *(int *)result = ACB_NO;
00034     else if(strcmp(value, "ask") == 0)
00035         *(int *)result = ACB_ASK;
00036     else
00037     {
00038         cfg_error(cfg, "invalid value for option '%s': %s",
00039         cfg_opt_name(opt), value);
00040         return -1;
00041     }
00042     return 0;
00043 }
00044 
00045 /* validates a port option (must be positive) */
00046 int conf_validate_port(cfg_t *cfg, cfg_opt_t *opt)
00047 {
00048     int value = cfg_opt_getnint(opt, 0);
00049     if(value <= 0)
00050     {
00051         cfg_error(cfg, "invalid port %d in section '%s'", value, cfg_name(cfg));
00052         return -1;
00053     }
00054     return 0;
00055 }
00056 
00057 /* validates a bookmark section (host option required) */
00058 int conf_validate_bookmark(cfg_t *cfg, cfg_opt_t *opt)
00059 {
00060     cfg_t *bookmark = cfg_opt_getnsec(opt, cfg_opt_size(opt) - 1);
00061     if(cfg_size(bookmark, "host") == 0)
00062     {
00063         cfg_error(cfg, "missing required option 'host' in bookmark");
00064         return -1;
00065     }
00066     return 0;
00067 }
00068 
00069 cfg_t *parse_conf(const char *filename)
00070 {
00071     cfg_opt_t bookmark_opts[] = {
00072         CFG_STR("host", 0, CFGF_NODEFAULT),
00073         CFG_INT("port", 21, CFGF_NONE),
00074         CFG_STR("login", "anonymous", CFGF_NONE),
00075         CFG_STR("password", "anonymous@", CFGF_NONE),
00076         CFG_STR("directory", 0, CFGF_NONE),
00077         CFG_END()
00078     };
00079 
00080     cfg_opt_t opts[] = {
00081         CFG_SEC("bookmark", bookmark_opts, CFGF_MULTI | CFGF_TITLE),
00082         CFG_BOOL("passive-mode", cfg_false, CFGF_NONE),
00083         CFG_BOOL("remote-completion", cfg_true, CFGF_NONE),
00084         CFG_FUNC("alias", conf_alias),
00085         CFG_STR_LIST("xterm-terminals", "{xterm, rxvt}", CFGF_NONE),
00086         CFG_INT_CB("auto-create-bookmark", ACB_YES, CFGF_NONE, conf_parse_acb),
00087         CFG_FUNC("include-file", cfg_include),
00088         CFG_END()
00089     };
00090 
00091     cfg_t *cfg = cfg_init(opts, CFGF_NONE);
00092     cfg_set_validate_func(cfg, "bookmark|port", conf_validate_port);
00093     cfg_set_validate_func(cfg, "bookmark", conf_validate_bookmark);
00094 
00095     switch(cfg_parse(cfg, filename))
00096     {
00097         case CFG_FILE_ERROR:
00098             printf("warning: configuration file '%s' could not be read: %s\n",
00099                     filename, strerror(errno));
00100             printf("continuing with default values...\n\n");
00101         case CFG_SUCCESS:
00102             break;
00103         case CFG_PARSE_ERROR:
00104             return 0;
00105     }
00106 
00107     return cfg;
00108 }
00109 
00110 int main(int argc, char **argv)
00111 {
00112     int i;
00113     cfg_t *cfg = parse_conf(argc > 1 ? argv[1] : "ftp.conf");
00114 
00115     /* print the parsed configuration options */
00116     if(cfg)
00117     {
00118         printf("passive-mode = %s\n",
00119         cfg_getbool(cfg, "passive-mode") ? "true" : "false");
00120         printf("remote-completion = %s\n",
00121         cfg_getbool(cfg, "remote-completion") ? "true" : "false");
00122 
00123         printf("number of bookmarks: %d\n", cfg_size(cfg, "bookmark"));
00124         for(i = 0; i < cfg_size(cfg, "bookmark"); i++)
00125         {
00126             cfg_t *bookmark = cfg_getnsec(cfg, "bookmark", i);
00127             printf("  bookmark #%d: %s:%s@%s:%ld%s\n", i+1,
00128                     cfg_getstr(bookmark, "login"),
00129                     cfg_getstr(bookmark, "password"),
00130                     cfg_getstr(bookmark, "host"),
00131                     cfg_getint(bookmark, "port"),
00132                     cfg_getstr(bookmark, "directory"));
00133         }
00134 
00135         for(i = 0; i < cfg_size(cfg, "xterm-terminals"); i++)
00136     {
00137             printf("xterm-terminal #%d: %s\n",
00138         i+1, cfg_getnstr(cfg, "xterm-terminals", i));
00139     }
00140 
00141         printf("auto-create-bookmark = %ld\n",
00142         cfg_getint(cfg, "auto-create-bookmark"));
00143         cfg_free(cfg);
00144     }
00145 
00146     return 0;
00147 }
00148