lineedit: support empty PATH entries in tab completion
Zero-length path prefixes can be specified in PATH as a leading or
trailing colon or two adjacent colons. POSIX says that the use of
zero-length prefixes to refer to the current directory is a legacy
feature. Nonetheless the shells in BusyBox respect this feature,
as does 'which'.
Tab-completion of executables using PATH should support this too.
function old new delta
complete_cmd_dir_file 934 931 -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3) Total: -3 bytes
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 367396b..b0adcf1 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -769,8 +769,6 @@
if (!tmp)
break;
tmp++;
- if (*tmp == '\0')
- break; /* :<empty> */
npth++;
}
@@ -782,8 +780,6 @@
if (!tmp)
break;
*tmp++ = '\0'; /* ':' -> '\0' */
- if (*tmp == '\0')
- break; /* :<empty> */
res[npth++] = tmp;
}
/* special case: "match subdirectories of the current directory" */
@@ -854,6 +850,7 @@
struct dirent *next;
struct stat st;
char *found;
+ const char *lpath;
if (paths[i] == NULL) { /* path_parse()'s last component? */
/* in PATH completion, current dir's subdir names
@@ -863,7 +860,8 @@
paths[i] = (char *)".";
}
- dir = opendir(paths[i]);
+ lpath = *paths[i] ? paths[i] : ".";
+ dir = opendir(lpath);
if (!dir)
continue; /* don't print an error */
@@ -878,7 +876,7 @@
if (strncmp(basecmd, name_found, baselen) != 0)
continue; /* no */
- found = concat_path_file(paths[i], name_found);
+ found = concat_path_file(lpath, name_found);
/* NB: stat() first so that we see is it a directory;
* but if that fails, use lstat() so that
* we still match dangling links */