sysdb: Check for and use libedit/libreadline for command input.

[sysdb.git] / src / client / sysdb.c

diff --git a/src/client/sysdb.c b/src/client/sysdb.c
index c2b542d458e3aa2bbb1b4d5687f801a2b8d1a914..7283a21ae9ce42321e33885b17e6d3775894c307 100644 (file)
--- a/src/client/sysdb.c
+++ b/src/client/sysdb.c
@@ -54,6 +54,23 @@
 
 #include <pwd.h>
 
+#if HAVE_EDITLINE_READLINE_H
+#      include <editline/readline.h>
+#      if HAVE_EDITLINE_HISTORY_H
+#              include <editline/history.h>
+#      endif
+#elif HAVE_READLINE_READLINE_H
+#      include <readline/readline.h>
+#      if HAVE_READLINE_HISTORY_H
+#              include <readline/history.h>
+#      endif
+#elif HAVE_READLINE_H
+#      include <readline.h>
+#      if HAVE_HISTORY_H
+#              include <history.h>
+#      endif
+#endif /* READLINEs */
+
 #ifndef DEFAULT_SOCKET
 #      define DEFAULT_SOCKET "unix:"LOCALSTATEDIR"/run/sysdbd.sock"
 #endif
@@ -117,6 +134,31 @@ get_current_user(void)
        return result->pw_name;
 } /* get_current_user */
 
+static const char *
+get_homedir(const char *username)
+{
+       struct passwd pw_entry;
+       struct passwd *result = NULL;
+
+       /* needs to be static because we return a pointer into this buffer
+        * to the caller */
+       static char buf[1024];
+
+       int status;
+
+       memset(&pw_entry, 0, sizeof(pw_entry));
+       status = getpwnam_r(username, &pw_entry, buf, sizeof(buf), &result);
+
+       if (status || (! result)) {
+               char errbuf[1024];
+               sdb_log(SDB_LOG_WARNING, "Failed to determine home directory "
+                               "for user %s: %s", username,
+                               sdb_strerror(errno, errbuf, sizeof(errbuf)));
+               return NULL;
+       }
+       return result->pw_dir;
+} /* get_homedir */
+
 int
 main(int argc, char **argv)
 {
@@ -125,6 +167,9 @@ main(int argc, char **argv)
        const char *host = NULL;
        const char *user = NULL;
 
+       const char *homedir;
+       char hist_file[1024] = "";
+
        while (42) {
                int opt = getopt(argc, argv, "H:U:hV");
 
@@ -175,6 +220,42 @@ main(int argc, char **argv)
        sdb_log(SDB_LOG_INFO, "SysDB client "SDB_CLIENT_VERSION_STRING
                        SDB_CLIENT_VERSION_EXTRA"\n");
 
+       using_history();
+
+       if ((homedir = get_homedir(user))) {
+               snprintf(hist_file, sizeof(hist_file) - 1,
+                               "%s/.sysdb_history", homedir);
+               hist_file[sizeof(hist_file) - 1] = '\0';
+
+               errno = 0;
+               if (read_history(hist_file)) {
+                       char errbuf[1024];
+                       sdb_log(SDB_LOG_WARNING, "Failed to load history (%s): %s",
+                                       hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
+               }
+       }
+
+       while (42) {
+               char *line = readline("sysdb> ");
+
+               if (! line)
+                       break;
+               if (*line == '\0')
+                       continue;
+
+               if (*line != ' ')
+                       add_history(line);
+       }
+
+       if (hist_file[0] != '\0') {
+               errno = 0;
+               if (write_history(hist_file)) {
+                       char errbuf[1024];
+                       sdb_log(SDB_LOG_WARNING, "Failed to store history (%s): %s",
+                                       hist_file, sdb_strerror(errno, errbuf, sizeof(errbuf)));
+               }
+       }
+
        sdb_client_destroy(client);
        return 0;
 } /* main */