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authorRon Yorston2021-02-18 09:50:29 +0000
committerDenys Vlasenko2021-02-23 12:20:51 +0100
commit760b627e2ac6aedbf604040951280eaaf75939a8 (patch)
treeadf5545c8087221257e9add200f3144a27e01f90 /libbb
parent858f8aafacf93ff4642a2f62dc0d7f0f31f95cce (diff)
downloadbusybox-760b627e2ac6aedbf604040951280eaaf75939a8.zip
busybox-760b627e2ac6aedbf604040951280eaaf75939a8.tar.gz
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>
Diffstat (limited to 'libbb')
-rw-r--r--libbb/lineedit.c10
1 files changed, 4 insertions, 6 deletions
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 @@ static unsigned path_parse(char ***p)
if (!tmp)
break;
tmp++;
- if (*tmp == '\0')
- break; /* :<empty> */
npth++;
}
@@ -782,8 +780,6 @@ static unsigned path_parse(char ***p)
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 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
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 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
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 @@ static NOINLINE unsigned complete_cmd_dir_file(const char *command, int type)
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 */