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Diffstat (limited to 'libbb')
-rw-r--r--libbb/lineedit.c231
1 files changed, 118 insertions, 113 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index 6df556f4e..de7042491 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -154,7 +154,6 @@ 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];
@@ -233,6 +232,8 @@ static unsigned save_string(char *dst, unsigned maxsize)
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)
) {
@@ -245,6 +246,7 @@ static unsigned save_string(char *dst, unsigned maxsize)
dstpos += n;
if (wc == 0) /* usually is */
break;
+
/* We do have invalid byte here! */
command_ps[srcpos] = wc; /* restore it */
srcpos++;
@@ -606,53 +608,56 @@ 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);
- }
+ 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));
}
- } 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));
- }
- }
- endpwent();
}
+ endpwent();
}
#endif /* FEATURE_COMMAND_USERNAME_COMPLETION */
@@ -662,22 +667,19 @@ 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;
@@ -687,12 +689,13 @@ static int path_parse(char ***p, int flags)
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) {
@@ -704,100 +707,96 @@ static int path_parse(char ***p, int flags)
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++;
}
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,
@@ -810,15 +809,20 @@ static void exe_n_cwd_tab_completion(char *command, int type)
/* 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]; */
@@ -858,22 +862,23 @@ static NOINLINE int find_match(char *matchBuf, int *len_with_quotes)
}
/* 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 */
}
}
@@ -941,8 +946,8 @@ static NOINLINE int find_match(char *matchBuf, int *len_with_quotes)
}
}
}
- 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];
@@ -953,7 +958,7 @@ static NOINLINE int find_match(char *matchBuf, int *len_with_quotes)
}
/* 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) == '~')
@@ -1062,7 +1067,7 @@ static void input_tab(smallint *lastWasTab)
#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();
@@ -1072,7 +1077,7 @@ static void input_tab(smallint *lastWasTab)
* 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 */
@@ -1081,7 +1086,7 @@ static void input_tab(smallint *lastWasTab)
/* 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 */
@@ -1093,14 +1098,14 @@ static void input_tab(smallint *lastWasTab)
}
}
}
- 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++) {
@@ -1111,13 +1116,14 @@ static void input_tab(smallint *lastWasTab)
}
}
}
- 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;
@@ -1125,11 +1131,10 @@ static void input_tab(smallint *lastWasTab)
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: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 17:57:54 +0000