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File busybox-1.17.2-lineedit.patch of Package busybox (Revision 28)
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diff -urpN busybox-1.17.2/libbb/lineedit.c busybox-1.17.2-lineedit/libbb/lineedit.c --- busybox-1.17.2/libbb/lineedit.c 2010-08-23 02:44:35.000000000 +0200 +++ busybox-1.17.2-lineedit/libbb/lineedit.c 2010-09-07 18:33:16.337067116 +0200 @@ -156,7 +156,6 @@ struct lineedit_statics { /* Formerly these were big buffers on stack: */ #if ENABLE_FEATURE_TAB_COMPLETION - char exe_n_cwd_tab_completion__dirbuf[MAX_LINELEN]; char input_tab__matchBuf[MAX_LINELEN]; int16_t find_match__int_buf[MAX_LINELEN + 1]; /* need to have 9 bits at least */ int16_t find_match__pos_buf[MAX_LINELEN + 1]; @@ -235,6 +234,8 @@ static unsigned save_string(char *dst, u while (dstpos < maxsize) { wchar_t wc; int n = srcpos; + + /* Convert up to 1st invalid byte (or up to end) */ while ((wc = command_ps[srcpos]) != 0 && !unicode_is_raw_byte(wc) ) { @@ -247,6 +248,7 @@ static unsigned save_string(char *dst, u dstpos += n; if (wc == 0) /* usually is */ break; + /* We do have invalid byte here! */ command_ps[srcpos] = wc; /* restore it */ srcpos++; @@ -608,53 +610,56 @@ static void add_match(char *matched) } #if ENABLE_FEATURE_USERNAME_COMPLETION -static void username_tab_completion(char *ud, char *with_shash_flg) +/* Replace "~user/..." with "/homedir/...". + * The parameter is malloced, free it or return it + * unchanged if no user is matched. + */ +static char *username_path_completion(char *ud) { struct passwd *entry; + char *tilde_name = ud; + char *home = NULL; + + ud++; /* skip ~ */ + if (*ud == '/') { /* "~/..." */ + home = home_pwd_buf; + } else { + /* "~user/..." */ + ud = strchr(ud, '/'); + *ud = '\0'; /* "~user" */ + entry = getpwnam(tilde_name + 1); + *ud = '/'; /* restore "~user/..." */ + if (entry) + home = entry->pw_dir; + } + if (home) { + ud = concat_path_file(home, ud); + free(tilde_name); + tilde_name = ud; + } + return tilde_name; +} + +/* ~use<tab> - find all users with this prefix */ +static NOINLINE void username_completion(const char *ud) +{ + /* Using _r function to avoid pulling in static buffers */ + char line_buff[256]; + struct passwd pwd; + struct passwd *result; int userlen; - ud++; /* ~user/... to user/... */ + ud++; /* skip ~ */ userlen = strlen(ud); - if (with_shash_flg) { /* "~/..." or "~user/..." */ - char *sav_ud = ud - 1; - char *home = NULL; - - if (*ud == '/') { /* "~/..." */ - home = home_pwd_buf; - } else { - /* "~user/..." */ - char *temp; - temp = strchr(ud, '/'); - *temp = '\0'; /* ~user\0 */ - entry = getpwnam(ud); - *temp = '/'; /* restore ~user/... */ - ud = temp; - if (entry) - home = entry->pw_dir; - } - if (home) { - if ((userlen + strlen(home) + 1) < MAX_LINELEN) { - /* /home/user/... */ - sprintf(sav_ud, "%s%s", home, ud); - } - } - } else { - /* "~[^/]*" */ - /* Using _r function to avoid pulling in static buffers */ - char line_buff[256]; - struct passwd pwd; - struct passwd *result; - - setpwent(); - while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) { - /* Null usernames should result in all users as possible completions. */ - if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) { - add_match(xasprintf("~%s/", pwd.pw_name)); - } + setpwent(); + while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) { + /* Null usernames should result in all users as possible completions. */ + if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) { + add_match(xasprintf("~%s/", pwd.pw_name)); } - endpwent(); } + endpwent(); } #endif /* FEATURE_COMMAND_USERNAME_COMPLETION */ @@ -664,22 +669,19 @@ enum { FIND_FILE_ONLY = 2, }; -static int path_parse(char ***p, int flags) +static int path_parse(char ***p) { int npth; const char *pth; char *tmp; char **res; - /* if not setenv PATH variable, to search cur dir "." */ - if (flags != FIND_EXE_ONLY) - return 1; - if (state->flags & WITH_PATH_LOOKUP) pth = state->path_lookup; else pth = getenv("PATH"); - /* PATH=<empty> or PATH=:<empty> */ + + /* PATH="" or PATH=":"? */ if (!pth || !pth[0] || LONE_CHAR(pth, ':')) return 1; @@ -689,12 +691,13 @@ static int path_parse(char ***p, int fla tmp = strchr(tmp, ':'); if (!tmp) break; - if (*++tmp == '\0') + tmp++; + if (*tmp == '\0') break; /* :<empty> */ npth++; } - res = xmalloc(npth * sizeof(char*)); + *p = res = xmalloc(npth * sizeof(res[0])); res[0] = tmp = xstrdup(pth); npth = 1; while (1) { @@ -706,100 +709,96 @@ static int path_parse(char ***p, int fla break; /* :<empty> */ res[npth++] = tmp; } - *p = res; return npth; } static void exe_n_cwd_tab_completion(char *command, int type) { - DIR *dir; - struct dirent *next; - struct stat st; char *path1[1]; char **paths = path1; int npaths; int i; - char *found; - char *pfind = strrchr(command, '/'); -/* char dirbuf[MAX_LINELEN]; */ -#define dirbuf (S.exe_n_cwd_tab_completion__dirbuf) + char *pfind; + char *dirbuf = NULL; npaths = 1; path1[0] = (char*)"."; - if (pfind == NULL) { - /* no dir, if flags==EXE_ONLY - get paths, else "." */ - npaths = path_parse(&paths, type); + pfind = strrchr(command, '/'); + if (!pfind) { + if (type == FIND_EXE_ONLY) + npaths = path_parse(&paths); pfind = command; } else { + /* point to 'l' in "..../last_component" */ + pfind++; /* dirbuf = ".../.../.../" */ - safe_strncpy(dirbuf, command, (pfind - command) + 2); + dirbuf = xstrndup(command, pfind - command); #if ENABLE_FEATURE_USERNAME_COMPLETION if (dirbuf[0] == '~') /* ~/... or ~user/... */ - username_tab_completion(dirbuf, dirbuf); + dirbuf = username_path_completion(dirbuf); #endif - paths[0] = dirbuf; - /* point to 'l' in "..../last_component" */ - pfind++; + path1[0] = dirbuf; } for (i = 0; i < npaths; i++) { + DIR *dir; + struct dirent *next; + struct stat st; + char *found; + dir = opendir(paths[i]); if (!dir) continue; /* don't print an error */ while ((next = readdir(dir)) != NULL) { - int len1; - const char *str_found = next->d_name; + const char *name_found = next->d_name; - /* matched? */ - if (strncmp(str_found, pfind, strlen(pfind))) + /* .../<tab>: bash 3.2.0 shows dotfiles, but not . and .. */ + if (!pfind[0] && DOT_OR_DOTDOT(name_found)) continue; - /* not see .name without .match */ - if (*str_found == '.' && *pfind == '\0') { - if (NOT_LONE_CHAR(paths[i], '/') || str_found[1]) - continue; - str_found = ""; /* only "/" */ - } - found = concat_path_file(paths[i], str_found); - /* hmm, remove in progress? */ + /* match? */ + if (strncmp(name_found, pfind, strlen(pfind)) != 0) + continue; /* no */ + + found = concat_path_file(paths[i], 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 */ if (stat(found, &st) && lstat(found, &st)) - goto cont; - /* find with dirs? */ - if (paths[i] != dirbuf) - strcpy(found, next->d_name); /* only name */ + goto cont; /* hmm, remove in progress? */ - len1 = strlen(found); - found = xrealloc(found, len1 + 2); - found[len1] = '\0'; - found[len1+1] = '\0'; + /* save only name if we scan PATH */ + if (paths[i] != dirbuf) + strcpy(found, name_found); if (S_ISDIR(st.st_mode)) { + unsigned len1 = strlen(found); /* name is a directory */ if (found[len1-1] != '/') { + found = xrealloc(found, len1 + 2); found[len1] = '/'; + found[len1 + 1] = '\0'; } } else { - /* not put found file if search only dirs for cd */ + /* skip files if looking for dirs only (example: cd) */ if (type == FIND_DIR_ONLY) goto cont; } - /* Add it to the list */ + /* add it to the list */ add_match(found); continue; cont: free(found); } closedir(dir); - } + } /* for every path */ + if (paths != path1) { free(paths[0]); /* allocated memory is only in first member */ free(paths); } -#undef dirbuf + free(dirbuf); } /* QUOT is used on elements of int_buf[], which are bytes, @@ -812,15 +811,20 @@ static void exe_n_cwd_tab_completion(cha /* is must be <= in */ static void collapse_pos(int is, int in) { - memmove(int_buf+is, int_buf+in, (MAX_LINELEN+1-in)*sizeof(int_buf[0])); - memmove(pos_buf+is, pos_buf+in, (MAX_LINELEN+1-in)*sizeof(pos_buf[0])); + memmove(int_buf+is, int_buf+in, (MAX_LINELEN+1-in) * sizeof(int_buf[0])); + memmove(pos_buf+is, pos_buf+in, (MAX_LINELEN+1-in) * sizeof(pos_buf[0])); } -static NOINLINE int find_match(char *matchBuf, int *len_with_quotes) +/* On entry, matchBuf contains everything up to cursor at the moment <tab> + * was pressed. This function looks at it, figures out what part of it + * constitutes the command/file/directory prefix to use for completion, + * and rewrites matchBuf to contain only that part. + */ +static NOINLINE int build_match_prefix(char *matchBuf, int *len_with_quotes) { int i, j; int command_mode; int c, c2; -/* Were local, but it uses too much stack */ +/* Were local, but it used too much stack */ /* int16_t int_buf[MAX_LINELEN + 1]; */ /* int16_t pos_buf[MAX_LINELEN + 1]; */ @@ -860,22 +864,23 @@ static NOINLINE int find_match(char *mat } /* skip commands with arguments if line has commands delimiters */ - /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */ + /* ';' ';;' '&' '|' '&&' '||' but '>&' '<&' '>|' */ for (i = 0; int_buf[i]; i++) { + int n; c = int_buf[i]; c2 = int_buf[i + 1]; j = i ? int_buf[i - 1] : -1; - command_mode = 0; + n = 0; if (c == ';' || c == '&' || c == '|') { - command_mode = 1 + (c == c2); + n = 1 + (c == c2); if (c == '&') { if (j == '>' || j == '<') - command_mode = 0; + n = 0; } else if (c == '|' && j == '>') - command_mode = 0; + n = 0; } - if (command_mode) { - collapse_pos(0, i + command_mode); + if (n) { + collapse_pos(0, i + n); i = -1; /* hack incremet */ } } @@ -943,8 +948,8 @@ static NOINLINE int find_match(char *mat } } } - for (i = 0; int_buf[i]; i++) - /* "strlen" */; + for (i = 0; int_buf[i]; i++) /* quasi-strlen(int_buf) */ + continue; /* find last word */ for (--i; i >= 0; i--) { c = int_buf[i]; @@ -955,7 +960,7 @@ static NOINLINE int find_match(char *mat } /* skip first not quoted '\'' or '"' */ for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++) - /*skip*/; + continue; /* collapse quote or unquote // or /~ */ while ((int_buf[i] & ~QUOT) == '/' && ((int_buf[i+1] & ~QUOT) == '/' || (int_buf[i+1] & ~QUOT) == '~') @@ -1058,13 +1063,20 @@ static void input_tab(smallint *lastWasT /* Make a local copy of the string -- * up to the position of the cursor */ +#if !ENABLE_UNICODE_SUPPORT save_string(matchBuf, cursor + 1); -#if ENABLE_UNICODE_SUPPORT - cursor_mb = strlen(matchBuf); +#else + { + CHAR_T wc = command_ps[cursor]; + command_ps[cursor] = 0; + save_string(matchBuf, MAX_LINELEN); + command_ps[cursor] = wc; + cursor_mb = strlen(matchBuf); + } #endif tmp = matchBuf; - find_type = find_match(matchBuf, &recalc_pos); + find_type = build_match_prefix(matchBuf, &recalc_pos); /* Free up any memory already allocated */ free_tab_completion_data(); @@ -1074,7 +1086,7 @@ static void input_tab(smallint *lastWasT * then try completing this word as a username. */ if (state->flags & USERNAME_COMPLETION) if (matchBuf[0] == '~' && strchr(matchBuf, '/') == NULL) - username_tab_completion(matchBuf, NULL); + username_completion(matchBuf); #endif /* Try to match any executable in our path and everything * in the current working directory */ @@ -1083,7 +1095,7 @@ static void input_tab(smallint *lastWasT /* Sort, then remove any duplicates found */ if (matches) { unsigned i; - int n = 0; + unsigned n = 0; qsort_string_vector(matches, num_matches); for (i = 0; i < num_matches - 1; ++i) { if (matches[i] && matches[i+1]) { /* paranoia */ @@ -1095,14 +1107,14 @@ static void input_tab(smallint *lastWasT } } } - matches[n] = matches[i]; - num_matches = n + 1; + matches[n++] = matches[i]; + num_matches = n; } /* Did we find exactly one match? */ - if (!matches || num_matches > 1) { /* no */ + if (num_matches != 1) { /* no */ beep(); if (!matches) - return; /* not found */ + return; /* no matches at all */ /* find minimal match */ tmp1 = xstrdup(matches[0]); for (tmp = tmp1; *tmp; tmp++) { @@ -1113,13 +1125,14 @@ static void input_tab(smallint *lastWasT } } } - if (*tmp1 == '\0') { /* have unique */ - free(tmp1); + if (*tmp1 == '\0') { /* have unique pfx? */ + free(tmp1); /* no */ return; } tmp = add_quote_for_spec_chars(tmp1); free(tmp1); - } else { /* one match */ + len_found = strlen(tmp); + } else { /* exactly one match */ tmp = add_quote_for_spec_chars(matches[0]); /* for next completion current found */ *lastWasTab = FALSE; @@ -1127,11 +1140,10 @@ static void input_tab(smallint *lastWasT len_found = strlen(tmp); if (tmp[len_found-1] != '/') { tmp[len_found] = ' '; - tmp[len_found+1] = '\0'; + tmp[++len_found] = '\0'; } } - len_found = strlen(tmp); #if !ENABLE_UNICODE_SUPPORT /* have space to place the match? */ /* The result consists of three parts with these lengths: */ @@ -1164,7 +1176,10 @@ static void input_tab(smallint *lastWasT sprintf(&command[cursor_mb - recalc_pos], "%s%s", tmp, matchBuf); command_len = load_string(command, S.maxsize); /* write out the matched command */ - redraw(cmdedit_y, command_len - len); + /* paranoia: load_string can return 0 on conv error, + * prevent passing len = (0 - 12) to redraw */ + len = command_len - len; + redraw(cmdedit_y, len >= 0 ? len : 0); } } #endif @@ -2297,6 +2312,8 @@ int FAST_FUNC read_line_input(const char * or exit if len=0 and no chars to delete */ if (command_len == 0) { errno = 0; + + case -1: /* error (e.g. EIO when tty is destroyed) */ #if ENABLE_FEATURE_EDITING_VI prepare_to_die: #endif diff -urpN busybox-1.17.2/libbb/unicode.c busybox-1.17.2-lineedit/libbb/unicode.c --- busybox-1.17.2/libbb/unicode.c 2010-08-23 02:44:35.000000000 +0200 +++ busybox-1.17.2-lineedit/libbb/unicode.c 2010-09-02 12:23:52.062709133 +0200 @@ -131,7 +131,7 @@ size_t FAST_FUNC wcstombs(char *dest, co size_t len = wcrtomb_internal(tbuf, wc); if (len > n) - len = n; + break; memcpy(dest, tbuf, len); if (wc == L'\0') return org_n - n;
