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-rw-r--r--toys/posix/find.c315
1 files changed, 254 insertions, 61 deletions
diff --git a/toys/posix/find.c b/toys/posix/find.c
index 873f83cb..5159172a 100644
--- a/toys/posix/find.c
+++ b/toys/posix/find.c
@@ -3,10 +3,12 @@
* Copyright 2014 Rob Landley <rob@landley.net>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.c
+ *
* Our "unspecified" behavior for no paths is to use "."
* Parentheses can only stack 4096 deep
+ * Not treating two {} as an error, but only using last
-USE_FIND(NEWTOY(find, "^HL", TOYFLAG_USR|TOYFLAG_BIN))
+USE_FIND(NEWTOY(find, "?^HL", TOYFLAG_USR|TOYFLAG_BIN))
config FIND
bool "find"
@@ -15,43 +17,46 @@ config FIND
usage: find [-HL] [DIR...] [<options>]
Search directories for matching files.
- (Default is to search "." match all and display matches.)
+ Default: search "." match all -print all matches.
- -H Follow command line symlinks
- -L Follow all symlinks
+ -H Follow command line symlinks -L Follow all symlinks
Match filters:
- -name <pattern> filename (with wildcards)
- -path <pattern> path name (with wildcards)
- -nouser belongs to unknown user
- -nogroup belongs to unknown group
- -xdev do not cross into new filesystems
- -prune do not descend into children
- -perm MODE permissons (prefixed with - means at least these)
- -iname PATTERN case insensitive filename
- -links N hardlink count
- -user UNAME belongs to user
- -group GROUP belongs to group
- -size N[c]
- -atime N
- -ctime N
- -type [bcdflps] type (block, char, dir, file, symlink, pipe, socket)
- -mtime N last modified N (24 hour) days ago
-
- Numbers N may be prefixed by a - (less than) or + (greater than)
+ -name PATTERN filename with wildcards -iname case insensitive -name
+ -path PATTERN path name with wildcards -ipath case insensitive -path
+ -user UNAME belongs to user -nouser belongs to unknown user
+ -group GROUP belongs to group -nogroup belongs to unknown group
+ -perm [-]MODE permissons (-=at least) -prune ignore contents of dir
+ -size N[c] 512 byte blocks (c=bytes) -xdev stay in this filesystem
+ -links N hardlink count -atime N accessed N days ago
+ -ctime N created N days ago -mtime N modified N days ago
+ -type [bcdflps] (block, char, dir, file, symlink, pipe, socket)
+
+ Numbers N may be prefixed by a - (less than) or + (greater than):
Combine matches with:
!, -a, -o, ( ) not, and, or, group expressions
-
Actions:
- -exec
- -print
- -print0
+ -print Print match with newline -print0 Print match with null
+ -exec Run command with path -execdir Run command in file's dir
+ -ok Ask before exec -okdir Ask before execdir
+
+ Commands substitute "{}" with matched file. End with ";" to run each file,
+ or "+" (next argument after "{}") to collect and run with multiple files.
*/
// find . ! \( -name blah -print \)
// find . -o
+// find -type f
+
+// pending issues:
+// old false -a ! new false does not yield true.
+//
+// -user -group -newer evaluate once and save result (where?)
+// add -print if no action (-exec, -ok, -print)
+// find . -print -xdev (should xdev before print)
+// -exec {} + accepts any + after {}, not just immediately after. ";" optional
#define FOR_find
#include "toys.h"
@@ -59,10 +64,62 @@ config FIND
GLOBALS(
char **filter;
struct double_list *argdata;
- int xdev, depth;
+ int topdir, xdev, depth, envsize;
time_t now;
)
+// None of this can go in TT because you can have more than one -exec
+struct exec_range {
+ char *next, *prev;
+
+ int dir, plus, arglen, argsize, curly, namecount, namesize;
+ char **argstart;
+ struct double_list *names;
+};
+
+// Perform pending -exec (if any)
+static int flush_exec(struct dirtree *new, struct exec_range *aa)
+{
+ struct double_list **dl;
+ char **newargs;
+ int rc;
+
+ if (!aa->namecount) return 0;
+
+ if (aa->dir && new->parent) dl = (void *)&new->parent->extra;
+ else dl = &aa->names;
+ dlist_terminate(dl);
+
+ // switch to directory for -execdir, or back to top if we have an -execdir
+ // _and_ a normal -exec, or are at top of tree in -execdir
+ if (aa->dir && new->parent) fchdir(new->parent->data);
+ else if (TT.topdir != -1) fchdir(TT.topdir);
+
+ // execdir: accumulated execs in this directory's children.
+ newargs = xmalloc(sizeof(char *)*(aa->arglen+aa->namecount+1));
+ if (!aa->curly) {
+ memcpy(newargs, aa->argstart+1, sizeof(char *)*aa->arglen);
+ newargs[aa->arglen] = 0;
+ } else {
+ struct double_list *dl2 = *dl;
+ int pos = aa->curly, rest = aa->arglen - aa->curly;
+
+ // Collate argument list
+ memcpy(newargs, aa->argstart+1, sizeof(char *)*pos);
+ for (dl2 = *dl; dl2; dl2 = dl2->next) newargs[pos++] = dl2->data;
+ rest = aa->arglen - aa->curly;
+ memcpy(newargs+pos, aa->argstart+aa->curly+1,
+ sizeof(char *)*(rest-1));
+ newargs[pos+rest] = 0;
+ }
+
+ rc = xpclose(xpopen(newargs, 0), 0);
+
+ llist_traverse(dl, llist_free_double);
+
+ return rc;
+}
+
// Return numeric value with explicit sign
static int compare_numsign(long val, long units, char *str)
{
@@ -92,29 +149,70 @@ void todo_store_argument(void)
error_exit("NOP");
}
-// pending issues:
-// old false -a ! new false does not yield true.
-//
-// -user -group -newer evaluate once and save result (where?)
-// add -print if no action (-exec, -ok, -print)
-// find . -print -xdev (should xdev before print)
+char *strlower(char *s)
+{
+ char *new;
+
+ if (!CFG_TOYBOX_I18N) {
+ new = xstrdup(s);
+ for (; *s; s++) *(new++) = tolower(*s);
+ } else {
+ // I can't guarantee the string _won't_ expand during reencoding, so...?
+ new = xmalloc(strlen(s)*2+1);
+
+ while (*s) {
+ wchar_t c;
+ int len = mbrtowc(&c, s, MB_CUR_MAX, 0);
+
+ if (len < 1) *(new++) = *(s++);
+ else {
+ // squash title case too
+ c = towlower(c);
+
+ // if we had a valid utf8 sequence, convert it to lower case, and can't
+ // encode back to utf8, something is wrong with your libc. But just
+ // in case somebody finds an exploit...
+ len = wcrtomb(s, c, 0);
+ if (len < 1) error_exit("bad utf8 %x", c);
+ s += len;
+ }
+ }
+ }
+
+ return new;
+}
-// Call this with 0 for first pass argument parsing, syntax checking.
+// Call this with 0 for first pass argument parsing and syntax checking (which
+// populates argdata). Later commands traverse argdata (in order) when they
+// need "do once" results.
static int do_find(struct dirtree *new)
{
int pcount = 0, print = 0, not = 0, active = !!new, test = active, recurse;
+ struct double_list *argdata = TT.argdata;
char *s, **ss;
- recurse = DIRTREE_RECURSE|((toys.optflags&FLAG_L) ? DIRTREE_SYMFOLLOW : 0);
+ recurse = DIRTREE_COMEAGAIN|((toys.optflags&FLAG_L) ? DIRTREE_SYMFOLLOW : 0);
// skip . and .. below topdir, handle -xdev and -depth
- if (active) {
+ if (new) {
if (new->parent) {
if (!dirtree_notdotdot(new)) return 0;
if (TT.xdev && new->st.st_dev != new->parent->st.st_dev) return 0;
}
- if (TT.depth && S_ISDIR(new->st.st_dev) && new->data != -1)
- return DIRTREE_COMEAGAIN;
+ if (S_ISDIR(new->st.st_mode)) {
+ if (!new->again) {
+ if (TT.depth) return recurse;
+ } else {
+ struct double_list *dl;
+
+ if (TT.topdir != -1)
+ for (dl = TT.argdata; dl; dl = dl->next)
+ if (dl->prev == (void *)1 || !new->parent)
+ toys.exitval |= flush_exec(new, (void *)dl);
+
+ return 0;
+ }
+ }
}
// pcount: parentheses stack depth (using toybuf bytes, 4096 max depth)
@@ -183,24 +281,28 @@ static int do_find(struct dirtree *new)
// Remaining filters take an argument
} else {
-
- if (!strcmp(s, "name") || !strcmp(s, "iname")) {
- if (check) {
- if (*s == 'i') todo_store_argument();
-// if (!new) {
-// } else {
-// name = xstrdup(name);
-// while (
- test = !fnmatch(ss[1], new->name, 0);
+ if (!strcmp(s, "name") || !strcmp(s, "iname")
+ || !strcmp(s, "path") || !strcmp(s, "ipath"))
+ {
+ int i = (*s == 'i');
+ char *arg = ss[1], *path = 0, *name = new->name;
+
+ // Handle path expansion and case flattening
+ if (new && s[i] == 'p') name = path = dirtree_path(new, 0);
+ if (i) {
+ if (check || !new) {
+ name = strlower(new ? name : arg);
+ if (!new) {
+ dlist_add(&TT.argdata, name);
+ free(path);
+ } else arg = ((struct double_list *)llist_pop(&argdata))->data;
+ }
}
- } else if (!strcmp(s, "path")) {
- if (check) {
- char *path = dirtree_path(new, 0);
- int len = strlen(ss[1]);
- if (strncmp(path, ss[1], len) || (ss[1][len] && ss[1][len] != '/'))
- test = 0;
- free(s);
+ if (check) {
+ test = !fnmatch(arg, name, FNM_PATHNAME*(s[i] == 'p'));
+ free(path);
+ if (i) free(name);
}
} else if (!strcmp(s, "perm")) {
if (check) {
@@ -217,7 +319,7 @@ static int do_find(struct dirtree *new)
int types[] = {S_IFBLK, S_IFCHR, S_IFDIR, S_IFLNK, S_IFIFO,
S_IFREG, S_IFSOCK};
- if ((new->st.st_dev & S_IFMT) != types[c]) test = 0;
+ if ((new->st.st_mode & S_IFMT) != types[c]) test = 0;
}
} else if (!strcmp(s, "atime")) {
@@ -240,9 +342,91 @@ static int do_find(struct dirtree *new)
todo_store_argument();
} else if (!strcmp(s, "newer")) {
todo_store_argument();
- } else if (!strcmp(s, "exec") || !strcmp("ok", s)) {
+ } else if (!strcmp(s, "exec") || !strcmp("ok", s)
+ || !strcmp(s, "execdir") || !strcmp(s, "okdir"))
+ {
+ struct exec_range *aa;
+
print++;
- if (check) error_exit("implement exec/ok");
+
+ // Initial argument parsing pass
+ if (!new) {
+ // special case "-exec \;" to fall through to "needs 1 arg" error.
+ if (!strcmp(ss[1], ";")) {
+ int len;
+
+ dlist_add_nomalloc(&TT.argdata,(void *)(aa = xzalloc(sizeof(*aa))));
+ aa->argstart = ++ss;
+
+ // Record command line arguments to -exec
+ for (len = 0; ss[len]; len++) {
+ if (!strcmp(ss[len], ";")) break;
+ else if (!strcmp(ss[len], "{}")) {
+ aa->curly = len;
+ if (!strcmp(ss[len+1], "+")) {
+
+ // Measure environment space
+ if (!TT.envsize) {
+ char **env;
+
+ for (env = environ; *env; env++)
+ TT.envsize += sizeof(char *) + strlen(*env) + 1;
+ TT.envsize += sizeof(char *);
+ }
+ aa->plus++;
+ len++;
+ break;
+ }
+ } else aa->argsize += sizeof(char *) + strlen(ss[len]) + 1;
+ }
+ if (!ss[len]) error_exit("-exec without \\;");
+ ss += len-1;
+ aa->arglen = len;
+ aa->dir = !!strchr(s, 'd');
+ if (aa->dir && TT.topdir == -1) TT.topdir = xopen(".", 0);
+ }
+
+ // collect names and execute commands
+ } else {
+ if (check) {
+ char *name;
+ struct double_list **dl;
+
+ // Grab command line exec argument list
+ aa = (void *)llist_pop(&argdata);
+
+ // name is always a new malloc, so we can always free it.
+ name = aa->dir ? xstrdup(new->name) : dirtree_path(new, 0);
+
+ // Mark entry so COMEAGAIN can call flush_exec() in parent.
+ // This is never a valid pointer valud for prev to have otherwise
+ if (aa->dir) aa->prev = (void *)1;
+
+ if (*s == 'o') {
+ char *prompt = xmprintf("[%s] %s", ss[1], name);
+ if(!(test = yesno(prompt, 0))) goto cont;
+ }
+
+ // Add next name to list (global list without -dir, local with)
+ if (aa->dir && new->parent)
+ dl = (struct double_list **)&new->parent->extra;
+ else dl = &aa->names;
+
+ // Is this + mode?
+ if (aa->plus) {
+ int size = sizeof(char *)+strlen(name)+1;
+
+ // Linux caps environment space (env vars + args) at 32 4k pages.
+ // todo: is there a way to probe this instead of constant here?
+
+ if (TT.envsize+aa->argsize+aa->namesize+size >= 131072)
+ toys.exitval |= flush_exec(new, aa);
+ aa->namesize += size;
+ }
+ dlist_add(dl, name);
+ if (!aa->plus) test = flush_exec(new, aa);
+ }
+ }
} else goto error;
// This test can go at the end because we do a syntax checking
@@ -250,14 +434,16 @@ static int do_find(struct dirtree *new)
// vs -known noarg) right.
if (!*++ss) error_exit("'%s' needs 1 arg", --s);
}
-
+cont:
// Apply pending "!" to result
if (active && not) test = !test;
not = 0;
}
- // If there was no action, print
- if (!print && test && new) do_print(new, '\n');
+ if (new) {
+ // If there was no action, print
+ if (!print && test) do_print(new, '\n');
+ } else dlist_terminate(TT.argdata);
return recurse;
@@ -270,13 +456,15 @@ void find_main(void)
int i, len;
char **ss = toys.optargs;
+ TT.topdir = -1;
+
// Distinguish paths from filters
for (len = 0; toys.optargs[len]; len++)
if (strchr("-!(", *toys.optargs[len])) break;
TT.filter = toys.optargs+len;
// use "." if no paths
- if (!*ss) {
+ if (!*ss || **ss == '-') {
ss = (char *[]){"."};
len = 1;
}
@@ -292,4 +480,9 @@ void find_main(void)
new = dirtree_add_node(0, ss[i], toys.optflags&(FLAG_H|FLAG_L));
if (new) dirtree_handle_callback(new, do_find);
}
+
+ if (CFG_TOYBOX_FREE) {
+ close(TT.topdir);
+ llist_traverse(TT.argdata, free);
+ }
}
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