BASH PATCH REPORT ================= Bash-Release: 4.3 Patch-ID: bash43-010 Bug-Reported-by: Albert Shih Bug-Reference-ID: Wed, 5 Mar 2014 23:01:40 +0100 Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00028.html Bug-Description: Patch (apply with `patch -p0'): This patch changes the behavior of programmable completion to compensate for two assumptions made by the bash-completion package. Bash-4.3 changed to dequote the argument to programmable completion only under certain circumstances, to make the behavior of compgen more consistent when run from the command line -- closer to the behavior when run by a shell function run as part of programmable completion. Bash-completion can pass quoted arguments to compgen when the original word to be completed was not quoted, expecting programmable completion to dequote the word before attempting completion. This patch fixes two cases: 1. An empty string that bash-completion passes to compgen as a quoted null string (''). 2. An unquoted word that bash-completion quotes using single quotes or backslashes before passing it to compgen. In these cases, since readline did not detect a quote character in the original word to be completed, bash-4.3 --- a/externs.h +++ b/externs.h @@ -324,6 +324,7 @@ extern char *sh_un_double_quote __P((cha extern char *sh_backslash_quote __P((char *, const char *, int)); extern char *sh_backslash_quote_for_double_quotes __P((char *)); extern int sh_contains_shell_metas __P((char *)); +extern int sh_contains_quotes __P((char *)); /* declarations for functions defined in lib/sh/spell.c */ extern int spname __P((char *, char *)); --- a/lib/sh/shquote.c +++ b/lib/sh/shquote.c @@ -311,3 +311,17 @@ sh_contains_shell_metas (string) return (0); } + +int +sh_contains_quotes (string) + char *string; +{ + char *s; + + for (s = string; s && *s; s++) + { + if (*s == '\'' || *s == '"' || *s == '\\') + return 1; + } + return 0; +} --- a/pcomplete.c +++ b/pcomplete.c @@ -183,6 +183,7 @@ ITEMLIST it_variables = { LIST_DYNAMIC, COMPSPEC *pcomp_curcs; const char *pcomp_curcmd; +const char *pcomp_curtxt; #ifdef DEBUG /* Debugging code */ @@ -753,6 +754,32 @@ pcomp_filename_completion_function (text quoted strings. */ dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character); } + /* Intended to solve a mismatched assumption by bash-completion. If + the text to be completed is empty, but bash-completion turns it into + a quoted string ('') assuming that this code will dequote it before + calling readline, do the dequoting. */ + else if (iscompgen && iscompleting && + pcomp_curtxt && *pcomp_curtxt == 0 && + text && (*text == '\'' || *text == '"') && text[1] == text[0] && text[2] == 0 && + rl_filename_dequoting_function) + dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character); + /* Another mismatched assumption by bash-completion. If compgen is being + run as part of bash-completion, and the argument to compgen is not + the same as the word originally passed to the programmable completion + code, dequote the argument if it has quote characters. It's an + attempt to detect when bash-completion is quoting its filename + argument before calling compgen. */ + /* We could check whether gen_shell_function_matches is in the call + stack by checking whether the gen-shell-function-matches tag is in + the unwind-protect stack, but there's no function to do that yet. + We could simply check whether we're executing in a function by + checking variable_context, and may end up doing that. */ + else if (iscompgen && iscompleting && rl_filename_dequoting_function && + pcomp_curtxt && text && + STREQ (pcomp_curtxt, text) == 0 && + variable_context && + sh_contains_quotes (text)) /* guess */ + dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character); else dfn = savestring (text); } @@ -1522,7 +1549,7 @@ gen_progcomp_completions (ocmd, cmd, wor COMPSPEC **lastcs; { COMPSPEC *cs, *oldcs; - const char *oldcmd; + const char *oldcmd, *oldtxt; STRINGLIST *ret; cs = progcomp_search (ocmd); @@ -1545,14 +1572,17 @@ gen_progcomp_completions (ocmd, cmd, wor oldcs = pcomp_curcs; oldcmd = pcomp_curcmd; + oldtxt = pcomp_curtxt; pcomp_curcs = cs; pcomp_curcmd = cmd; + pcomp_curtxt = word; ret = gen_compspec_completions (cs, cmd, word, start, end, foundp); pcomp_curcs = oldcs; pcomp_curcmd = oldcmd; + pcomp_curtxt = oldtxt; /* We need to conditionally handle setting *retryp here */ if (retryp) --- a/patchlevel.h +++ b/patchlevel.h @@ -25,6 +25,6 @@ regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh looks for to find the patch level (for the sccs version string). */ -#define PATCHLEVEL 9 +#define PATCHLEVEL 10 #endif /* _PATCHLEVEL_H_ */