lineedit: add handling of \H in prompt

Based on the patch by Arnaud Rébillout <rebillout@syscom.ch>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 52b49e8..591bb6d 100644 (file)
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -1789,7 +1789,44 @@ static void parse_and_put_prompt(const char *prmt_ptr)
                if (c == '\\') {
                        const char *cp = prmt_ptr;
                        int l;
-
+/*
+ * Supported via bb_process_escape_sequence:
+ * \a  ASCII bell character (07)
+ * \e  ASCII escape character (033)
+ * \n  newline
+ * \r  carriage return
+ * \\  backslash
+ * \nnn        char with octal code nnn
+ * Supported:
+ * \$  if the effective UID is 0, a #, otherwise a $
+ * \!  history number of this command
+ *     (buggy?)
+ * \w  current working directory, with $HOME abbreviated with a tilde
+ *     Note: we do not support $PROMPT_DIRTRIM=n feature
+ * \h  hostname up to the first '.'
+ * \H  hostname
+ * \u  username
+ * \[  begin a sequence of non-printing characters
+ * \]  end a sequence of non-printing characters
+ * Not supported:
+ * \#  command number of this command
+ * \j  number of jobs currently managed by the shell
+ * \l  basename of the shell's terminal device name
+ * \s  name of the shell, the basename of $0 (the portion following the final slash)
+ * \V  release of bash, version + patch level (e.g., 2.00.0)
+ * \W  basename of the current working directory, with $HOME abbreviated with a tilde
+ * \d  date in "Weekday Month Date" format (e.g., "Tue May 26")
+ * \D{format}
+ *     format is passed to strftime(3).
+ *     An empty format results in a locale-specific time representation.
+ *     The braces are required.
+ * \T  current time in 12-hour HH:MM:SS format
+ * \@  current time in 12-hour am/pm format
+ * \A  current time in 24-hour HH:MM format
+ * Mishandled by bb_process_escape_sequence:
+ * \t  current time in 24-hour HH:MM:SS format
+ * \v  version of bash (e.g., 2.00)
+ */
                        c = bb_process_escape_sequence(&prmt_ptr);
                        if (prmt_ptr == cp) {
                                if (*cp == '\0')
@@ -1802,9 +1839,11 @@ static void parse_and_put_prompt(const char *prmt_ptr)
                                        pbuf = user_buf ? user_buf : (char*)"";
                                        break;
 # endif
+                               case 'H':
                                case 'h':
                                        pbuf = free_me = safe_gethostname();
-                                       *strchrnul(pbuf, '.') = '\0';
+                                       if (c == 'h')
+                                               strchrnul(pbuf, '.')[0] = '\0';
                                        break;
                                case '$':
                                        c = (geteuid() == 0 ? '#' : '$');
@@ -1832,9 +1871,10 @@ static void parse_and_put_prompt(const char *prmt_ptr)
                                case '!':
                                        pbuf = free_me = xasprintf("%d", num_ok_lines);
                                        break;
-                               case 'e': case 'E':     /* \e \E = \033 */
-                                       c = '\033';
-                                       break;
+// bb_process_escape_sequence does this now:
+//                             case 'e': case 'E':     /* \e \E = \033 */
+//                                     c = '\033';
+//                                     break;
                                case 'x': case 'X': {
                                        char buf2[4];
                                        for (l = 0; l < 3;) {