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[gregoa/bti.git] / bti.c
diff --git a/bti.c b/bti.c
index 24e359e028be651b1b43fd179c78ce0131b4b6c2..ae32c377d89d97f6398d8c434ef9aa0f12cbd3da 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)
@@ -82,12 +82,17 @@ struct session {
        char *group;
        char *hosturl;
        char *hostname;
+       char *configfile;
+       char *replyto;
        int bash;
+       int interactive;
        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 {
@@ -113,6 +118,8 @@ static void display_help(void)
        fprintf(stdout, "  --proxy PROXY:PORT\n");
        fprintf(stdout, "  --host HOST\n");
        fprintf(stdout, "  --logfile logfile\n");
+       fprintf(stdout, "  --config configfile\n");
+       fprintf(stdout, "  --replyto ID\n");
        fprintf(stdout, "  --shrink-urls\n");
        fprintf(stdout, "  --page PAGENUMBER\n");
        fprintf(stdout, "  --bash\n");
@@ -128,6 +135,102 @@ 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');
+       if (temp)
+               *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 or won't find anything */
+       session->readline = get_string;
+       if (!isatty(0))
+               return;
+       session->interactive = 1;
+
+       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;
+               handle = dlopen(cp, RTLD_NOW);
+               if (handle) {
+                       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;
@@ -142,6 +245,7 @@ static void session_free(struct session *session)
 {
        if (!session)
                return;
+       free(session->replyto);
        free(session->password);
        free(session->account);
        free(session->tweet);
@@ -152,6 +256,7 @@ static void session_free(struct session *session)
        free(session->group);
        free(session->hosturl);
        free(session->hostname);
+       free(session->configfile);
        free(session);
 }
 
@@ -215,6 +320,7 @@ static void parse_statuses(xmlDocPtr doc, xmlNodePtr current)
        xmlChar *text = NULL;
        xmlChar *user = NULL;
        xmlChar *created = NULL;
+       xmlChar *id = NULL;
        xmlNodePtr userinfo;
 
        current = current->xmlChildrenNode;
@@ -224,6 +330,8 @@ static void parse_statuses(xmlDocPtr doc, xmlNodePtr current)
                                created = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
                        if (!xmlStrcmp(current->name, (const xmlChar *)"text"))
                                text = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
+                       if (!xmlStrcmp(current->name, (const xmlChar *)"id"))
+                               id = xmlNodeListGetString(doc, current->xmlChildrenNode, 1);
                        if (!xmlStrcmp(current->name, (const xmlChar *)"user")) {
                                userinfo = current->xmlChildrenNode;
                                while (userinfo != NULL) {
@@ -236,19 +344,21 @@ static void parse_statuses(xmlDocPtr doc, xmlNodePtr current)
                                }
                        }
 
-                       if (user && text && created) {
+                       if (user && text && created && id) {
                                if (verbose)
-                                       printf("[%s] (%.16s) %s\n",
-                                               user, created, text);
+                                       printf("[%s] {%s} (%.16s) %s\n",
+                                               user, id, created, text);
                                else
                                        printf("[%s] %s\n",
                                                user, text);
                                xmlFree(user);
                                xmlFree(text);
                                xmlFree(created);
+                               xmlFree(id);
                                user = NULL;
                                text = NULL;
                                created = NULL;
+                               id = NULL;
                        }
                }
                current = current->next;
@@ -360,6 +470,12 @@ static int send_request(struct session *session)
                             CURLFORM_COPYCONTENTS, "bti",
                             CURLFORM_END);
 
+               if (session->replyto)
+                       curl_formadd(&formpost, &lastptr,
+                                    CURLFORM_COPYNAME, "in_reply_to_status_id",
+                                    CURLFORM_COPYCONTENTS, session->replyto,
+                                    CURLFORM_END);
+
                curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
                slist = curl_slist_append(slist, "Expect:");
                curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist);
@@ -452,12 +568,7 @@ static void parse_configfile(struct session *session)
        char *file;
        int shrink_urls = 0;
 
-       /* config file is ~/.bti  */
-       file = alloca(strlen(session->homedir) + 7);
-
-       sprintf(file, "%s/.bti", session->homedir);
-
-       config_file = fopen(file, "r");
+       config_file = fopen(session->configfile, "r");
 
        /* No error if file does not exist or is unreadable.  */
        if (config_file == NULL)
@@ -609,7 +720,8 @@ static void log_session(struct session *session, int retval)
                                session->time, session->hostname);
                else
                        fprintf(log_file, "%s: host=%s tweet=%s\n",
-                               session->time, session->hostname, session->tweet);
+                               session->time, session->hostname,
+                               session->tweet);
                break;
        case ACTION_FRIENDS:
                fprintf(log_file, "%s: host=%s retrieving friends timeline\n",
@@ -650,7 +762,8 @@ static char *get_string_from_stdin(void)
        if (!fgets(string, 999, stdin))
                return NULL;
        temp = strchr(string, '\n');
-       *temp = '\0';
+       if (temp)
+               *temp = '\0';
        return string;
 }
 
@@ -961,6 +1074,8 @@ int main(int argc, char *argv[], char *envp[])
                { "dry-run", 0, NULL, 'n' },
                { "page", 1, NULL, 'g' },
                { "version", 0, NULL, 'v' },
+               { "config", 1, NULL, 'c' },
+               { "replyto", 1, NULL, 'r' },
                { }
        };
        struct session *session;
@@ -975,7 +1090,6 @@ int main(int argc, char *argv[], char *envp[])
 
        debug = 0;
        verbose = 0;
-       rl_bind_key('\t', rl_insert);
 
        session = session_alloc();
        if (!session) {
@@ -988,8 +1102,13 @@ int main(int argc, char *argv[], char *envp[])
        session->time = strdup(ctime(&t));
        session->time[strlen(session->time)-1] = 0x00;
 
+       /* Get the home directory so we can try to find a config file */
        session->homedir = strdup(getenv("HOME"));
 
+       /* set up a default config file location (traditionally ~/.bti) */
+       session->configfile = zalloc(strlen(session->homedir) + 7);
+       sprintf(session->configfile, "%s/.bti", session->homedir);
+
        curl_global_init(CURL_GLOBAL_ALL);
 
        /* Set environment variables first, before reading command line options
@@ -1005,7 +1124,7 @@ 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:G:snVv",
+               option = getopt_long_only(argc, argv, "dp:P:H:a:A:u:c:hg:G:sr:nVv",
                                          options, NULL);
                if (option == -1)
                        break;
@@ -1027,6 +1146,10 @@ int main(int argc, char *argv[], char *envp[])
                        dbg("page = %d\n", page_nr);
                        session->page = page_nr;
                        break;
+               case 'r':
+                       session->replyto = strdup(optarg);
+                       dbg("in_reply_to_status_id = %s\n", session->replyto);
+                       break;
                case 'p':
                        if (session->password)
                                free(session->password);
@@ -1101,6 +1224,18 @@ int main(int argc, char *argv[], char *envp[])
                case 'b':
                        session->bash = 1;
                        break;
+               case 'c':
+                       if (session->configfile)
+                               free(session->configfile);
+                       session->configfile = strdup(optarg);
+                       dbg("configfile = %s\n", session->configfile);
+
+                       /*
+                        * read the config file now.  Yes, this could override previously
+                        * set options from the command line, but the user asked for it...
+                        */
+                       parse_configfile(session);
+                       break;
                case 'h':
                        display_help();
                        goto exit;
@@ -1116,6 +1251,7 @@ int main(int argc, char *argv[], char *envp[])
                }
        }
 
+       session_readline_init(session);
        /*
         * Show the version to make it easier to determine what
         * is going on here
@@ -1137,12 +1273,12 @@ int main(int argc, char *argv[], char *envp[])
 
        if (session->action == ACTION_GROUP && !session->group) {
                fprintf(stdout, "Enter group name: ");
-               session->group = readline(NULL);
+               session->group = session->readline(NULL);
        }
 
        if (!session->account) {
                fprintf(stdout, "Enter account for %s: ", session->hostname);
-               session->account = readline(NULL);
+               session->account = session->readline(NULL);
        }
 
        if (!session->password) {
@@ -1151,10 +1287,10 @@ int main(int argc, char *argv[], char *envp[])
        }
 
        if (session->action == ACTION_UPDATE) {
-               if (session->bash)
+               if (session->bash || !session->interactive)
                        tweet = get_string_from_stdin();
                else
-                       tweet = readline("tweet: ");
+                       tweet = session->readline("tweet: ");
                if (!tweet || strlen(tweet) == 0) {
                        dbg("no tweet?\n");
                        return -1;
@@ -1179,6 +1315,7 @@ int main(int argc, char *argv[], char *envp[])
 
        if (session->page == 0)
                session->page = 1;
+       dbg("config file = %s\n", session->configfile);
        dbg("account = %s\n", session->account);
        dbg("password = %s\n", session->password);
        dbg("host = %d\n", session->host);
@@ -1201,6 +1338,7 @@ int main(int argc, char *argv[], char *envp[])
 
        log_session(session, retval);
 exit:
+       session_readline_cleanup(session);
        session_free(session);
        return retval;;
 }