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Patch for `cd' to accept two parameters (repeat post)


From: ggopalak
Subject: Patch for `cd' to accept two parameters (repeat post)
Date: Sun, 21 Sep 2003 22:28:02 +1000
User-agent: Mutt/1.4.1i

Configuration Information [Automatically generated, do not change]:
Machine: sparc
OS: solaris2.8
Compiler: cc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='sparc' 
-DCONF_OSTYPE='solaris2.8' -DCONF_MACHTYPE='sparc-sun-solaris2.8' 
-DCONF_VENDOR='sun' -DSHELL  -DHAVE_CONFIG_H  -D_LARGEFILE_SOURCE 
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -I.  -I. -I./include -I./lib 
-I/usr/local/include -g
uname output: SunOS numbat.cs.rmit.edu.au 5.8 Generic_108528-23 sun4u sparc 
SUNW,Ultra-80
Machine Type: sparc-sun-solaris2.8

Bash Version: 2.04
Patch Level: 0
Release Status: release

Description:
    This is a feature I like in ksh. Running 'cd' with two parameters will
    cause all instances of the first string to be replaced in 'pwd' with
    the second string, and then a 'cd' done.

        [Sorry to send this again, forgot to add a subject last time]

Repeat-By:
        None

Fix:

diff -rbc bash-2.05b/builtins/cd.def bash/builtins/cd.def
*** bash-2.05b/builtins/cd.def  Tue Jul 16 04:51:39 2002
--- bash/builtins/cd.def        Sun Sep 21 21:31:21 2003
***************
*** 177,182 ****
--- 177,231 ----
    lflag = (cdable_vars ? LCD_DOVARS : 0) |
          ((interactive && cdspelling) ? LCD_DOSPELL : 0);
  
+   /* `cd' with two arguments replaces all occurrences of the
+      first arg in `pwd' with the second arg and then
+      does a `cd' with the resulting string */
+   if (list && list->next)
+     {
+       char *tmp = NULL, *pwd = NULL;
+       char *pwd_save = NULL, *newdir = NULL;
+       char *first = list->word->word;
+       char *second = list->next->word->word;
+       int  length_f, length_s, length;
+ 
+ #define tcwd the_current_working_directory
+ 
+       pwd = tcwd ? (no_symlinks ? sh_physpath (tcwd, 0) : tcwd)
+          : get_working_directory ("pwd");
+ #undef tcwd
+       if (pwd == 0)
+         {
+           builtin_error ("Unable to determine current directory");
+           return (EXECUTION_FAILURE);
+         }
+       pwd_save = xmalloc(strlen(pwd) + 1);
+       strcpy(pwd_save, pwd);
+       pwd = pwd_save;
+ 
+       /* Just for xrealloc to work */
+       newdir = xmalloc(1);
+       newdir[0] = '\0';
+ 
+       length_f = strlen(first);
+       length_s = strlen(second);
+       length = 1;
+       while ((tmp = strstr (pwd, first)) != 0)
+        {
+           /* No need to add 1 */
+          length += (tmp - pwd) + length_s;
+          newdir = xrealloc (newdir, length);
+          *tmp = '\0';
+          strcat (newdir, pwd);
+          strcat (newdir, second);
+          pwd = tmp + length_f;
+        }
+       newdir = xrealloc (newdir, length + strlen(pwd));
+       strcat (newdir, pwd);
+       free (list->word->word);
+       list->word->word = newdir;
+       free (pwd_save);
+    }
+ 
    if (list == 0)
      {
        /* `cd' without arguments is equivalent to `cd $HOME' */


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