]> ToastFreeware Gitweb - gregoa/bti.git/blobdiff - bti.c
Remove link-time dependancy on readline
[gregoa/bti.git] / bti.c
diff --git a/bti.c b/bti.c
index fe4c6e2f77db85a79a8a0bd2e0f22816bf02fec2..285fdfadc7471063a1d6bfd7a2135c47edefb065 100644 (file)
--- a/bti.c
+++ b/bti.c
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <curl/curl.h>
-#include <readline/readline.h>
 #include <libxml/xmlmemory.h>
 #include <libxml/parser.h>
 #include <libxml/tree.h>
 #include <pcre.h>
+#include <termios.h>
+#include <dlfcn.h>
 
 
 #define zalloc(size)   calloc(size, 1)
@@ -65,7 +66,8 @@ enum action {
        ACTION_USER    = 2,
        ACTION_REPLIES = 4,
        ACTION_PUBLIC  = 8,
-       ACTION_UNKNOWN = 16
+       ACTION_GROUP   = 16,
+       ACTION_UNKNOWN = 32
 };
 
 struct session {
@@ -77,13 +79,17 @@ struct session {
        char *homedir;
        char *logfile;
        char *user;
+       char *group;
        char *hosturl;
+       char *hostname;
        int bash;
        int shrink_urls;
        int dry_run;
        int page;
        enum host host;
        enum action action;
+       void *readline_handle;
+       char *(*readline)(const char *);
 };
 
 struct bti_curl_buffer {
@@ -102,9 +108,10 @@ static void display_help(void)
        fprintf(stdout, "  --account accountname\n");
        fprintf(stdout, "  --password password\n");
        fprintf(stdout, "  --action action\n");
-       fprintf(stdout, "    ('update', 'friends', 'public', 'replies' "
-               "or 'user')\n");
+       fprintf(stdout, "    ('update', 'friends', 'public', 'replies', "
+               "'group' or 'user')\n");
        fprintf(stdout, "  --user screenname\n");
+       fprintf(stdout, "  --group groupname\n");
        fprintf(stdout, "  --proxy PROXY:PORT\n");
        fprintf(stdout, "  --host HOST\n");
        fprintf(stdout, "  --logfile logfile\n");
@@ -123,6 +130,97 @@ static void display_version(void)
        fprintf(stdout, "bti - version %s\n", VERSION);
 }
 
+static char *get_string(const char *name)
+{
+       char *temp;
+       char *string;
+
+       string = zalloc(1000);
+       if (!string)
+               exit(1);
+       if (name != NULL)
+               fprintf(stdout, "%s", name);
+       if (!fgets(string, 999, stdin))
+               return NULL;
+       temp = strchr(string, '\n');
+       *temp = '\0';
+       return string;
+}
+
+/*
+ * Try to get a handle to a readline function from a variety of different
+ * libraries.  If nothing is present on the system, then fall back to an
+ * internal one.
+ *
+ * Logic originally based off of code in the e2fsutils package in the
+ * lib/ss/get_readline.c file, which is licensed under the MIT license.
+ *
+ * This keeps us from having to relicense the bti codebase if readline
+ * ever changes its license, as there is no link-time dependancy.
+ * It is a run-time thing only, and we handle any readline-like library
+ * in the same manner, making bti not be a derivative work of any
+ * other program.
+ */
+static void session_readline_init(struct session *session)
+{
+       /* Libraries we will try to use for readline/editline functionality */
+       const char *libpath = "libreadline.so.6:libreadline.so.5:"
+                               "libreadline.so.4:libreadline.so:libedit.so.2:"
+                               "libedit.so:libeditline.so.0:libeditline.so";
+       void *handle = NULL;
+       char *tmp, *cp, *next;
+       int (*bind_key)(int, void *);
+       void (*insert)(void);
+
+       /* default to internal function if we can't find anything */
+       session->readline = get_string;
+
+       tmp = malloc(strlen(libpath)+1);
+       if (!tmp)
+               return;
+       strcpy(tmp, libpath);
+       for (cp = tmp; cp; cp = next) {
+               next = strchr(cp, ':');
+               if (next)
+                       *next++ = 0;
+               if (*cp == 0)
+                       continue;
+               if ((handle = dlopen(cp, RTLD_NOW))) {
+                       dbg("Using %s for readline library\n", cp);
+                       break;
+               }
+       }
+       free(tmp);
+       if (!handle) {
+               dbg("No readline library found.\n");
+               return;
+       }
+
+       session->readline_handle = handle;
+       session->readline = (char *(*)(const char *))dlsym(handle, "readline");
+       if (session->readline == NULL) {
+               /* something odd happened, default back to internal stuff */
+               session->readline_handle = NULL;
+               session->readline = get_string;
+               return;
+       }
+
+       /*
+        * If we found a library, turn off filename expansion
+        * as that makes no sense from within bti.
+        */
+       bind_key = (int (*)(int, void *))dlsym(handle, "rl_bind_key");
+       insert = (void (*)(void))dlsym(handle, "rl_insert");
+       if (bind_key && insert)
+               bind_key('\t', insert);
+}
+
+static void session_readline_cleanup(struct session *session)
+{
+       if (session->readline_handle)
+               dlclose(session->readline_handle);
+}
+
 static struct session *session_alloc(void)
 {
        struct session *session;
@@ -130,6 +228,7 @@ static struct session *session_alloc(void)
        session = zalloc(sizeof(*session));
        if (!session)
                return NULL;
+       session_readline_init(session);
        return session;
 }
 
@@ -137,6 +236,7 @@ static void session_free(struct session *session)
 {
        if (!session)
                return;
+       session_readline_cleanup(session);
        free(session->password);
        free(session->account);
        free(session->tweet);
@@ -144,7 +244,9 @@ static void session_free(struct session *session)
        free(session->time);
        free(session->homedir);
        free(session->user);
+       free(session->group);
        free(session->hosturl);
+       free(session->hostname);
        free(session);
 }
 
@@ -178,12 +280,15 @@ static void bti_curl_buffer_free(struct bti_curl_buffer *buffer)
 
 static const char *twitter_host  = "https://twitter.com/statuses";
 static const char *identica_host = "https://identi.ca/api/statuses";
+static const char *twitter_name  = "twitter";
+static const char *identica_name = "identi.ca";
 
 static const char *user_uri    = "/user_timeline/";
 static const char *update_uri  = "/update.xml";
 static const char *public_uri  = "/public_timeline.xml";
 static const char *friends_uri = "/friends_timeline.xml";
 static const char *replies_uri = "/replies.xml";
+static const char *group_uri = "/../laconica/groups/timeline/";
 
 static CURL *curl_init(void)
 {
@@ -332,6 +437,9 @@ static int send_request(struct session *session)
        if (!curl)
                return -EINVAL;
 
+       if (!session->hosturl)
+               session->hosturl = strdup(twitter_host);
+
        switch (session->action) {
        case ACTION_UPDATE:
                snprintf(user_password, sizeof(user_password), "%s:%s",
@@ -350,7 +458,7 @@ static int send_request(struct session *session)
                curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
                slist = curl_slist_append(slist, "Expect:");
                curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
-               
+
                sprintf(endpoint, "%s%s", session->hosturl, update_uri);
                curl_easy_setopt(curl, CURLOPT_URL, endpoint);
                curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
@@ -366,21 +474,29 @@ static int send_request(struct session *session)
 
                break;
        case ACTION_USER:
-               sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl, user_uri,
-                               session->user, session->page);
+               sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
+                       user_uri, session->user, session->page);
                curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 
                break;
        case ACTION_REPLIES:
                snprintf(user_password, sizeof(user_password), "%s:%s",
                         session->account, session->password);
-               sprintf(endpoint, "%s%s?page=%d", session->hosturl, replies_uri, session->page);
+               sprintf(endpoint, "%s%s?page=%d", session->hosturl, replies_uri,
+                       session->page);
                curl_easy_setopt(curl, CURLOPT_URL, endpoint);
                curl_easy_setopt(curl, CURLOPT_USERPWD, user_password);
 
                break;
        case ACTION_PUBLIC:
-               sprintf(endpoint, "%s%s?page=%d", session->hosturl, public_uri, session->page);
+               sprintf(endpoint, "%s%s?page=%d", session->hosturl, public_uri,
+                       session->page);
+               curl_easy_setopt(curl, CURLOPT_URL, endpoint);
+
+               break;
+       case ACTION_GROUP:
+               sprintf(endpoint, "%s%s%s.xml?page=%d", session->hosturl,
+                               group_uri, session->group, session->page);
                curl_easy_setopt(curl, CURLOPT_URL, endpoint);
 
                break;
@@ -501,14 +617,13 @@ static void parse_configfile(struct session *session)
                        if (!strncasecmp(c, "true", 4) ||
                                        !strncasecmp(c, "yes", 3))
                                shrink_urls = 1;
-               }
-               else if (!strncasecmp(c, "verbose", 7) &&
+               } else if (!strncasecmp(c, "verbose", 7) &&
                                (c[7] == '=')) {
                        c += 8;
                        if (!strncasecmp(c, "true", 4) ||
                                        !strncasecmp(c, "yes", 3))
                                verbose = 1;
-               }       
+               }
        } while (!feof(config_file));
 
        if (password)
@@ -519,12 +634,15 @@ static void parse_configfile(struct session *session)
                if (strcasecmp(host, "twitter") == 0) {
                        session->host = HOST_TWITTER;
                        session->hosturl = strdup(twitter_host);
+                       session->hostname = strdup(twitter_name);
                } else if (strcasecmp(host, "identica") == 0) {
                        session->host = HOST_IDENTICA;
                        session->hosturl = strdup(identica_host);
+                       session->hostname = strdup(identica_name);
                } else {
                        session->host = HOST_CUSTOM;
                        session->hosturl = strdup(host);
+                       session->hostname = strdup(host);
                }
                free(host);
        }
@@ -546,6 +664,8 @@ static void parse_configfile(struct session *session)
                        session->action = ACTION_REPLIES;
                else if (strcasecmp(action, "public") == 0)
                        session->action = ACTION_PUBLIC;
+               else if (strcasecmp(action, "group") == 0)
+                       session->action = ACTION_GROUP;
                else
                        session->action = ACTION_UNKNOWN;
                free(action);
@@ -563,7 +683,6 @@ static void log_session(struct session *session, int retval)
 {
        FILE *log_file;
        char *filename;
-       char *host;
 
        /* Only log something if we have a log file set */
        if (!session->logfile)
@@ -577,42 +696,35 @@ static void log_session(struct session *session, int retval)
        log_file = fopen(filename, "a+");
        if (log_file == NULL)
                return;
-       switch (session->host) {
-       case HOST_TWITTER:
-               host = "twitter";
-               break;
-       case HOST_IDENTICA:
-               host = "identi.ca";
-               break;
-       default:
-               host = session->hosturl;
-               break;
-       }
 
        switch (session->action) {
        case ACTION_UPDATE:
                if (retval)
                        fprintf(log_file, "%s: host=%s tweet failed\n",
-                               session->time, host);
+                               session->time, session->hostname);
                else
                        fprintf(log_file, "%s: host=%s tweet=%s\n",
-                               session->time, host, session->tweet);
+                               session->time, session->hostname, session->tweet);
                break;
        case ACTION_FRIENDS:
                fprintf(log_file, "%s: host=%s retrieving friends timeline\n",
-                       session->time, host);
+                       session->time, session->hostname);
                break;
        case ACTION_USER:
                fprintf(log_file, "%s: host=%s retrieving %s's timeline\n",
-                       session->time, host, session->user);
+                       session->time, session->hostname, session->user);
                break;
        case ACTION_REPLIES:
                fprintf(log_file, "%s: host=%s retrieving replies\n",
-                       session->time, host);
+                       session->time, session->hostname);
                break;
        case ACTION_PUBLIC:
                fprintf(log_file, "%s: host=%s retrieving public timeline\n",
-                       session->time, host);
+                       session->time, session->hostname);
+               break;
+       case ACTION_GROUP:
+               fprintf(log_file, "%s: host=%s retrieving group timeline\n",
+                       session->time, session->hostname);
                break;
        default:
                break;
@@ -637,6 +749,32 @@ static char *get_string_from_stdin(void)
        return string;
 }
 
+static void read_password(char *buf, size_t len, char *host)
+{
+       char pwd[80];
+       int retval;
+       struct termios old;
+       struct termios tp;
+
+       tcgetattr(0, &tp);
+       old = tp;
+
+       tp.c_lflag &= (~ECHO);
+       tcsetattr(0, TCSANOW, &tp);
+
+       fprintf(stdout, "Enter password for %s: ", host);
+       fflush(stdout);
+       tcflow(0, TCOOFF);
+       retval = scanf("%79s", pwd);
+       tcflow(0, TCOON);
+       fprintf(stdout, "\n");
+
+       tcsetattr(0, TCSANOW, &old);
+
+       strncpy(buf, pwd, len);
+       buf[len-1] = '\0';
+}
+
 static int find_urls(const char *tweet, int **pranges)
 {
        /*
@@ -910,6 +1048,7 @@ int main(int argc, char *argv[], char *envp[])
                { "proxy", 1, NULL, 'P' },
                { "action", 1, NULL, 'A' },
                { "user", 1, NULL, 'u' },
+               { "group", 1, NULL, 'G' },
                { "logfile", 1, NULL, 'L' },
                { "shrink-urls", 0, NULL, 's' },
                { "help", 0, NULL, 'h' },
@@ -922,6 +1061,7 @@ int main(int argc, char *argv[], char *envp[])
        struct session *session;
        pid_t child;
        char *tweet;
+       static char password[80];
        int retval = 0;
        int option;
        char *http_proxy;
@@ -930,7 +1070,6 @@ int main(int argc, char *argv[], char *envp[])
 
        debug = 0;
        verbose = 0;
-       rl_bind_key('\t', rl_insert);
 
        session = session_alloc();
        if (!session) {
@@ -960,7 +1099,7 @@ int main(int argc, char *argv[], char *envp[])
        parse_configfile(session);
 
        while (1) {
-               option = getopt_long_only(argc, argv, "dp:P:H:a:A:u:hg:snVv",
+               option = getopt_long_only(argc, argv, "dp:P:H:a:A:u:hg:G:snVv",
                                          options, NULL);
                if (option == -1)
                        break;
@@ -1005,6 +1144,8 @@ int main(int argc, char *argv[], char *envp[])
                                session->action = ACTION_REPLIES;
                        else if (strcasecmp(optarg, "public") == 0)
                                session->action = ACTION_PUBLIC;
+                       else if (strcasecmp(optarg, "group") == 0)
+                               session->action = ACTION_GROUP;
                        else
                                session->action = ACTION_UNKNOWN;
                        dbg("action = %d\n", session->action);
@@ -1015,6 +1156,13 @@ int main(int argc, char *argv[], char *envp[])
                        session->user = strdup(optarg);
                        dbg("user = %s\n", session->user);
                        break;
+
+               case 'G':
+                       if (session->group)
+                               free(session->group);
+                       session->group = strdup(optarg);
+                       dbg("group = %s\n", session->group);
+                       break;
                case 'L':
                        if (session->logfile)
                                free(session->logfile);
@@ -1027,15 +1175,20 @@ int main(int argc, char *argv[], char *envp[])
                case 'H':
                        if (session->hosturl)
                                free(session->hosturl);
+                       if (session->hostname)
+                               free(session->hostname);
                        if (strcasecmp(optarg, "twitter") == 0) {
                                session->host = HOST_TWITTER;
                                session->hosturl = strdup(twitter_host);
+                               session->hostname = strdup(twitter_name);
                        } else if (strcasecmp(optarg, "identica") == 0) {
                                session->host = HOST_IDENTICA;
                                session->hosturl = strdup(identica_host);
+                               session->hostname = strdup(identica_name);
                        } else {
                                session->host = HOST_CUSTOM;
                                session->hosturl = strdup(optarg);
+                               session->hostname = strdup(optarg);
                        }
                        dbg("host = %d\n", session->host);
                        break;
@@ -1067,25 +1220,35 @@ int main(int argc, char *argv[], char *envp[])
        if (session->action == ACTION_UNKNOWN) {
                fprintf(stderr, "Unknown action, valid actions are:\n");
                fprintf(stderr, "'update', 'friends', 'public', "
-                       "'replies' or 'user'.\n");
+                       "'replies', 'group' or 'user'.\n");
+               goto exit;
+       }
+
+       if (session->host == HOST_TWITTER && session->action == ACTION_GROUP) {
+               fprintf(stderr, "Groups only work in Identi.ca.\n");
                goto exit;
        }
 
+       if (session->action == ACTION_GROUP && !session->group) {
+               fprintf(stdout, "Enter group name: ");
+               session->group = session->readline(NULL);
+       }
+
        if (!session->account) {
-               fprintf(stdout, "Enter twitter account: ");
-               session->account = readline(NULL);
+               fprintf(stdout, "Enter account for %s: ", session->hostname);
+               session->account = session->readline(NULL);
        }
 
        if (!session->password) {
-               fprintf(stdout, "Enter twitter password: ");
-               session->password = readline(NULL);
+               read_password(password, sizeof(password), session->hostname);
+               session->password = strdup(password);
        }
 
        if (session->action == ACTION_UPDATE) {
                if (session->bash)
                        tweet = get_string_from_stdin();
                else
-                       tweet = readline("tweet: ");
+                       tweet = session->readline("tweet: ");
                if (!tweet || strlen(tweet) == 0) {
                        dbg("no tweet?\n");
                        return -1;
@@ -1096,7 +1259,8 @@ int main(int argc, char *argv[], char *envp[])
 
                session->tweet = zalloc(strlen(tweet) + 10);
                if (session->bash)
-                       sprintf(session->tweet, "%c %s", getuid() ? '$' : '#', tweet);
+                       sprintf(session->tweet, "%c %s",
+                               getuid() ? '$' : '#', tweet);
                else
                        sprintf(session->tweet, "%s", tweet);