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-rw-r--r--toys/pending/find.c363
-rw-r--r--toys/posix/find.c294
2 files changed, 294 insertions, 363 deletions
diff --git a/toys/pending/find.c b/toys/pending/find.c
deleted file mode 100644
index 1600f5f8..00000000
--- a/toys/pending/find.c
+++ /dev/null
@@ -1,363 +0,0 @@
-/* vi: set sw=4 ts=4:
- *
- * find.c - find files matching a criteria
- *
- * Copyright 2012 Tim Bird <tbird20d@gmail.com>
- *
- * See http://opengroup.org/onlinepubs/9699919799/utilities/find.html
-
-USE_FIND(NEWTOY(find, "?", TOYFLAG_USR|TOYFLAG_BIN))
-
-config FIND
- bool "find"
- default n
- help
- usage: find [DIR] [<options>]
-
- -name <pattern> match pattern
- -type [bcdflps] match file type
- !, -a, -o not, and , or
- (, ) group expressions
- -mtime [-+]n match file modification time (to within 24 hours)
- \t\t +=greater (older) than, -=less (younger) than
-
- File types:
- b block device d directory l symlink s socket
- c char device f regular file p FIFO
-*/
-
-/* To Do:
- * -exec action
- */
-
-#define FOR_find
-#include "toys.h"
-
-struct filter_node {
- struct filter_node *next;
- int op;
- union {
- char *name_regex;
- struct {
- int sign;
- time_t time;
- } t;
- mode_t type;
- struct {
- int arg_path_index;
- char **exec_args;
- } e;
- } data;
-};
-
-GLOBALS(
- char *dir;
- struct filter_node *filter_root;
- time_t itime;
-)
-
-/* filter operation types */
-#define OP_UNKNOWN 0
-#define OP_OR 2
-#define OP_AND 3
-#define OP_NOT 4
-
-#define LPAREN 1
-#define RPAREN 5
-
-#define MAX_OP 5
-
-#define CHECK_NAME 7
-#define CHECK_MTIME 8
-#define CHECK_TYPE 9
-
-#define ACTION_PRINT 20
-#define ACTION_PRINT0 21
-#define ACTION_EXEC 22
-
-#define IS_ACTION(x) (x >= 20)
-
-/* executes the command for a filter node
- returns 0 for failure or 1 for success
- */
-static int do_exec(struct filter_node *filter, struct dirtree *node)
-{
- char *path = NULL;
- char **arg_array;
- pid_t pid;
- int status;
-
- arg_array = filter->data.e.exec_args;
- if (filter->data.e.arg_path_index) {
- int plen;
- path = dirtree_path(node, &plen);
- arg_array[filter->data.e.arg_path_index] = path;
- }
-
- if (!(pid = xfork())) xexec(arg_array);
- free(path);
- waitpid(pid, &status, 0);
-
- return !WEXITSTATUS(status);
-}
-
-/* prefix evaluator */
-/* returns 0 for failure or 1 for success */
-static int evaluate(struct filter_node *filter, struct dirtree *node,
- struct filter_node **fnext)
-{
- int result;
- int op;
- static int skip = 0;
-
- /* if no filters, success */
- if (!filter) {
- *fnext = NULL;
- return 1;
- }
- op = filter->op;
-
- if (op==OP_NOT) return !evaluate(filter->next, node, fnext);
-
- if (op==OP_OR || op==OP_AND) {
- result = evaluate(filter->next, node, fnext);
- if(!skip) {
- if (op==OP_OR) {
- skip = result;
- result = evaluate(*fnext, node, fnext) || result;
- } else {
- skip = !result;
- result = evaluate(*fnext, node, fnext) && result;
- }
- skip = 0;
- }
- else result = evaluate(*fnext, node, fnext);
- return result;
- }
-
- // we're down to single operations, mark our position
- *fnext = filter->next;
- if(skip) return 0;
-
- // TODO: Do a regex comparison
- if (op==CHECK_NAME)
- return !strcmp(filter->data.name_regex, node->name);
-
- if (op==CHECK_MTIME) {
- long delta = (long)(((double)TT.itime - node->st.st_mtime) / 86400)
- -filter->data.t.time;
- return filter->data.t.sign == (delta > 0) - (delta < 0);
- }
- if (op==CHECK_TYPE) return (node->st.st_mode & S_IFMT) == filter->data.type;
-
-
- if (op==ACTION_PRINT || op==ACTION_PRINT0) {
- char *path;
- int plen = 0;
- char terminator = (op==ACTION_PRINT)*'\n';
-
- path = dirtree_path(node, &plen);
- printf("%s%c", path, terminator);
- free(path);
- return 1;
- }
-
- if (op==ACTION_EXEC) return !do_exec(filter, node);
-
- error_msg("Ran out of operations in filter list!");
- return 1;
-}
-
-static int check_node_callback(struct dirtree *node)
-{
- struct filter_node *junk;
-
- /* only recurse on "." at the root */
- /* so, don't recurse on 1) non-root "." and 2) any ".." */
-
- if (node->name[0] == '.' &&
- ((!node->name[1] && node->parent) ||
- (node->name[1]=='.' && !node->name[2])))
- return 0;
-
- evaluate(TT.filter_root, node, &junk);
- return DIRTREE_RECURSE;
-}
-
-
-static void build_filter_list(void)
-{
- struct filter_node *node_list, *op_stack, *node, *op_node, *next;
- char **arg;
- int j;
- int prevop = 0;
- int have_action = 0;
-
- /* part optargs here and build a filter list in prefix format */
-
- TT.dir = ".";
- node_list = NULL;
- for (arg = toys.optargs; *arg; arg++) {
- struct {
- char *arg;
- int op;
- int extrarg;
- } arg_map[] = {{"-o", OP_OR, 0},
- {"-a", OP_AND, 0},
- {"!", OP_NOT, 0},
- {"(", LPAREN, 0},
- {")", RPAREN, 0},
- {"-name", CHECK_NAME, 1},
- {"-mtime", CHECK_MTIME, 1},
- {"-type", CHECK_TYPE, 1},
- {"-print", ACTION_PRINT, 0},
- {"-print0", ACTION_PRINT0, 0},
- {"-exec", ACTION_EXEC, 1}
- };
- mode_t types[]={S_IFREG,S_IFDIR,S_IFCHR,S_IFBLK,S_IFLNK,S_IFSOCK,S_IFIFO};
- char **arg_array;
- node = (struct filter_node *) xmalloc(sizeof(struct filter_node));
- node->op = OP_UNKNOWN;
- for (j=0; j < sizeof(arg_map)/sizeof(*arg_map); j++) {
- if (!strcmp(*arg, arg_map[j].arg)) {
- node->op = arg_map[j].op;
- if (arg_map[j].extrarg && !*(++arg))
- error_exit("Missing argument to %s", arg_map[j].arg);
- break;
- }
- }
-
- switch(node->op) {
- case CHECK_NAME:
- node->data.name_regex = *arg;
- break;
- case CHECK_MTIME:
- switch(**arg) {
- case '+':
- node->data.t.sign=+1;
- (*arg)++;
- break;
- case '-':
- node->data.t.sign=-1;
- (*arg)++;
- break;
- default:
- node->data.t.sign=0;
- break;
- }
- node->data.t.time = atoi(*arg);
- break;
- case CHECK_TYPE:
- if (-1 == (j = stridx("fdcblsp", **arg)))
- error_exit("bad type '%s'", *arg);
- else node->data.type = types[j];
- break;
- case ACTION_EXEC:
- arg_array = xmalloc(sizeof(char *));
- for (j = 0; *arg && strcmp(*arg, ";"); j++) {
- /* new method */
- arg_array = xrealloc(arg_array, sizeof(char *) * (j+2));
- arg_array[j] = *arg;
- if (!strcmp(*arg, "{}")) node->data.e.arg_path_index = j;
-
- arg++;
- }
- if (!*arg) error_exit("need ';' in exec");
- arg_array[j] = 0;
- node->data.e.exec_args = arg_array;
- break;
- }
-
- have_action |= IS_ACTION(node->op);
-
- if (node->op == OP_UNKNOWN) {
- if (**arg == '-') error_exit("bad option '%s'", *arg);
- else TT.dir = *arg;
- } else {
- // add OP_AND where necessary
- if (node_list) {
- int o1 = node_list->op, o2 = node->op;
- if ((o1>MAX_OP && o2>MAX_OP) ||
- (o1==RPAREN && o2>=OP_NOT && o2!=RPAREN) ||
- (o1>=OP_NOT && o1!=LPAREN && o2==LPAREN)) {
- struct filter_node *n = (struct filter_node *)
- xmalloc(sizeof(struct filter_node));
- n->op = OP_AND;
- n->next = node_list;
- node_list = n;
- }
- }
- /* push node */
- node->next = node_list;;
- node_list = node;
- }
-
- }
-
- /* now convert from infix to prefix */
- if(have_action) TT.filter_root = NULL;
- else TT.filter_root = &(struct filter_node){0, ACTION_PRINT};
- op_stack = NULL;
- node = node_list;
- while( node ) {
- int op = node->op;
- next = node->next;
- if (op==LPAREN || op==RPAREN) {
- free(node);
- node = 0;
- }
- if (op<=MAX_OP) {
- if (prevop > op) {
- /* pop opstack to output */
- op_node = op_stack;
- while (op_node) {
- /* remove from op_stack */
- op_stack = op_node->next;
- /* push to output */
- op_node->next = TT.filter_root;
- TT.filter_root = op_node;
- /* get next node */
- op_node = op_stack;
- }
- }
- if (node) {
- /* push to opstack */
- node->next = op_stack;
- op_stack = node;
- }
- prevop = op*(op!=RPAREN);
- }
- else {
- /* push to output */
- node->next = TT.filter_root;
- TT.filter_root = node;
- }
- node = next;
- }
- /* end of input - push opstack to output */
- /* pop opstack to output till empty */
- op_node = op_stack;
- while (op_node) {
- op_stack = op_node->next;
- op_node->next = TT.filter_root;
- TT.filter_root = op_node;
- op_node = op_stack;
- }
- if(!have_action) {
- node = TT.filter_root;
- TT.filter_root = (struct filter_node*) xmalloc(sizeof(struct filter_node));
- TT.filter_root->next = node;
- TT.filter_root->op = OP_AND;
- }
-}
-
-void find_main(void)
-{
- TT.itime = time(NULL);
- /* parse filters, if present */
- build_filter_list();
-
- /* FIXTHIS - parse actions, if present */
-
- dirtree_read(TT.dir, check_node_callback);
-}
diff --git a/toys/posix/find.c b/toys/posix/find.c
new file mode 100644
index 00000000..cd9da924
--- /dev/null
+++ b/toys/posix/find.c
@@ -0,0 +1,294 @@
+/* find.c - Search directories for matching files.
+ *
+ * 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
+
+USE_FIND(NEWTOY(find, "^HL", TOYFLAG_USR|TOYFLAG_BIN))
+
+config FIND
+ bool "find"
+ default n
+ help
+ usage: find [-HL] [DIR...] [<options>]
+
+ Search directories for matching files.
+ (Default is to search "." match all and display matches.)
+
+ -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)
+
+ Combine matches with:
+ !, -a, -o, ( ) not, and, or, group expressions
+
+
+ Actions:
+ -exec
+ -print
+ -print0
+*/
+
+// find . ! \( -name blah -print \)
+// find . -o
+
+#define FOR_find
+#include "toys.h"
+
+GLOBALS(
+ char **filter;
+ struct double_list *argdata;
+ int xdev, depth;
+ time_t now;
+)
+
+// Return numeric value with explicit sign
+static int compare_numsign(long val, long units, char *str)
+{
+ char sign = 0;
+ long myval;
+
+ if (*str == '+' || *str == '-') sign = *(str++);
+ else if (!isdigit(*str)) error_exit("%s not [+-]N", str);
+ myval = atolx(str);
+ if (units && isdigit(str[strlen(str)-1])) myval *= units;
+
+ if (sign == '+') return val > myval;
+ if (sign == '-') return val < myval;
+ return val == myval;
+}
+
+static void do_print(struct dirtree *new, char c)
+{
+ char *s=dirtree_path(new, 0);
+
+ xprintf("%s%c", s, c);
+ free(s);
+}
+
+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)
+
+// Call this with 0 for first pass argument parsing, syntax checking.
+static int do_find(struct dirtree *new)
+{
+ int pcount = 0, print = 0, not = 0, active = !!new, test = active, recurse;
+ char *s, **ss;
+
+ recurse = DIRTREE_RECURSE|((toys.optflags&FLAG_L) ? DIRTREE_SYMFOLLOW : 0);
+
+ // skip . and .. below topdir, handle -xdev and -depth
+ if (active) {
+ 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;
+ }
+
+ // pcount: parentheses stack depth (using toybuf bytes, 4096 max depth)
+ // test: result of most recent test
+ // active: if 0 don't perform tests
+ // not: a pending ! applies to this test (only set if performing tests)
+ // print: saw one of print/ok/exec, no need for default -print
+
+ if (TT.filter) for (ss = TT.filter; *ss; ss++) {
+ int check = active && test;
+
+ s = *ss;
+
+ // handle ! ( ) using toybuf as a stack
+ if (*s != '-') {
+ if (s[1]) goto error;
+
+ if (*s == '!') {
+ // Don't invert if we're not making a decision
+ if (check) not = !not;
+
+ // Save old "not" and "active" on toybuf stack.
+ // Deactivate this parenthetical if !test
+ // Note: test value should never change while !active
+ } else if (*s == '(') {
+ if (pcount == sizeof(toybuf)) goto error;
+ toybuf[pcount++] = not+(active<<1);
+ if (!check) active = 0;
+
+ // Pop status, apply deferred not to test
+ } else if (*s == ')') {
+ if (--pcount < 0) goto error;
+ // Pop active state, apply deferred not (which was only set if checking)
+ active = (toybuf[pcount]>>1)&1;
+ if (active && (toybuf[pcount]&1)) test = !test;
+ not = 0;
+ } else goto error;
+
+ continue;
+ } else s++;
+
+ if (!strcmp(s, "xdev")) TT.xdev = 1;
+ else if (!strcmp(s, "depth")) TT.depth = 1;
+ else if (!strcmp(s, "o") || !strcmp(s, "or")) {
+ if (not) goto error;
+ if (active) {
+ if (!test) test = 1;
+ else active = 0; // decision has been made until next ")"
+ }
+
+ // Mostly ignore NOP argument
+ } else if (!strcmp(s, "a") || !strcmp(s, "and")) {
+ if (not) goto error;
+
+ } else if (!strcmp(s, "print") || !strcmp("print0", s)) {
+ print++;
+ if (check) do_print(new, s[6] ? 0 : '\n');
+
+ } else if (!strcmp(s, "nouser")) {
+ if (check) if (getpwuid(new->st.st_uid)) test = 0;
+ } else if (!strcmp(s, "nogroup")) {
+ if (check) if (getgrgid(new->st.st_gid)) test = 0;
+ } else if (!strcmp(s, "prune")) {
+ if (check && S_ISDIR(new->st.st_dev) && !TT.depth) recurse = 0;
+
+ // 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);
+ }
+ } 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);
+ }
+ } else if (!strcmp(s, "perm")) {
+ if (check) {
+ char *m = ss[1];
+ mode_t m1 = string_to_mode(m+(*m == '-'), 0),
+ m2 = new->st.st_dev & 07777;
+
+ if (*m != '-') m2 &= m1;
+ test = m1 == m2;
+ }
+ } else if (!strcmp(s, "type")) {
+ if (check) {
+ char c = stridx("bcdlpfs", *ss[1]);
+ 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;
+ }
+
+ } else if (!strcmp(s, "atime")) {
+ if (check)
+ test = compare_numsign(TT.now - new->st.st_atime, 86400, ss[1]);
+ } else if (!strcmp(s, "ctime")) {
+ if (check)
+ test = compare_numsign(TT.now - new->st.st_ctime, 86400, ss[1]);
+ } else if (!strcmp(s, "mtime")) {
+ if (check)
+ test = compare_numsign(TT.now - new->st.st_mtime, 86400, ss[1]);
+ } else if (!strcmp(s, "size")) {
+ if (check)
+ test = compare_numsign(new->st.st_size, 512, ss[1]);
+ } else if (!strcmp(s, "links")) {
+ if (check) test = compare_numsign(new->st.st_nlink, 0, ss[1]);
+ } else if (!strcmp(s, "user")) {
+ todo_store_argument();
+ } else if (!strcmp(s, "group")) {
+ todo_store_argument();
+ } else if (!strcmp(s, "newer")) {
+ todo_store_argument();
+ } else if (!strcmp(s, "exec") || !strcmp("ok", s)) {
+ print++;
+ if (check) error_exit("implement exec/ok");
+ } else goto error;
+
+ // This test can go at the end because we do a syntax checking
+ // pass first. Putting it here gets the error message (-unknown
+ // vs -known noarg) right.
+ if (!*++ss) error_exit("'%s' needs 1 arg", --s);
+ }
+
+ // 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');
+
+ return recurse;
+
+error:
+ error_exit("bad arg '%s'", *ss);
+}
+
+void find_main(void)
+{
+ int i, len;
+ char **ss = toys.optargs;
+
+ // 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) {
+ ss = (char *[]){"."};
+ len = 1;
+ }
+
+ // first pass argument parsing, verify args match up, handle "evaluate once"
+ TT.now = time(0);
+ do_find(0);
+
+ // Loop through paths
+ for (i = 0; i < len; i++) {
+ struct dirtree *new;
+
+ new = dirtree_add_node(0, ss[i], toys.optflags&(FLAG_H|FLAG_L));
+ if (new) dirtree_handle_callback(new, do_find);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 08:23:36 +0000