| /* 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 |
| * Not treating two {} as an error, but only using last |
| |
| USE_FIND(NEWTOY(find, "?^HL[-HL]", TOYFLAG_USR|TOYFLAG_BIN)) |
| |
| config FIND |
| bool "find" |
| default y |
| help |
| usage: find [-HL] [DIR...] [<options>] |
| |
| Search directories for matching files. |
| Default: search "." match all -print all matches. |
| |
| -H Follow command line symlinks -L Follow all symlinks |
| |
| Match filters: |
| -name PATTERN filename with wildcards -iname case insensitive -name |
| -path PATTERN path name with wildcards -ipath case insensitive -path |
| -user UNAME belongs to user UNAME -nouser user not in /etc/passwd |
| -group GROUP belongs to group GROUP -nogroup group not in /etc/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 |
| -newer FILE newer mtime than FILE -mindepth # at least # dirs down |
| -depth ignore contents of dir -maxdepth # at most # dirs down |
| -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: |
| -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. |
| */ |
| |
| #define FOR_find |
| #include "toys.h" |
| |
| GLOBALS( |
| char **filter; |
| struct double_list *argdata; |
| 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 = 0; |
| |
| 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) rc = fchdir(new->parent->data); |
| else if (TT.topdir != -1) rc = fchdir(TT.topdir); |
| if (rc) { |
| perror_msg("%s", new->name); |
| |
| return rc; |
| } |
| |
| // execdir: accumulated execs in this directory's children. |
| newargs = xmalloc(sizeof(char *)*(aa->arglen+aa->namecount+1)); |
| if (aa->curly < 0) { |
| memcpy(newargs, aa->argstart, 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, sizeof(char *)*pos); |
| for (dl2 = *dl; dl2; dl2 = dl2->next) newargs[pos++] = dl2->data; |
| rest = aa->arglen - aa->curly - 1; |
| memcpy(newargs+pos, aa->argstart+aa->curly+1, sizeof(char *)*rest); |
| newargs[pos+rest] = 0; |
| } |
| |
| rc = xrun(newargs); |
| |
| llist_traverse(*dl, llist_free_double); |
| *dl = 0; |
| aa->namecount = 0; |
| |
| return rc; |
| } |
| |
| // 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); |
| } |
| |
| char *strlower(char *s) |
| { |
| char *try, *new; |
| |
| if (!CFG_TOYBOX_I18N) { |
| try = new = xstrdup(s); |
| for (; *s; s++) *(new++) = tolower(*s); |
| } else { |
| // I can't guarantee the string _won't_ expand during reencoding, so...? |
| try = 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 { |
| s += len; |
| // 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(new, c, 0); |
| if (len < 1) error_exit("bad utf8 %x", (int)c); |
| new += len; |
| } |
| } |
| *new = 0; |
| } |
| |
| return try; |
| } |
| |
| // 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_COMEAGAIN|(DIRTREE_SYMFOLLOW*!!(toys.optflags&FLAG_L)); |
| |
| // skip . and .. below topdir, handle -xdev and -depth |
| if (new) { |
| if (new->parent) { |
| if (!dirtree_notdotdot(new)) return 0; |
| if (TT.xdev && new->st.st_dev != new->parent->st.st_dev) recurse = 0; |
| } |
| if (S_ISDIR(new->st.st_mode)) { |
| if (!new->again) { |
| struct dirtree *n; |
| |
| if (TT.depth) return recurse; |
| for (n = new->parent; n; n = n->parent) { |
| if (n->st.st_ino==new->st.st_ino && n->st.st_dev==new->st.st_dev) { |
| error_msg("'%s': loop detected", s = dirtree_path(new, 0)); |
| free(s); |
| |
| return 0; |
| } |
| } |
| } 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) |
| // 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; |
| not = 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 ")" |
| } |
| } else if (!strcmp(s, "not")) { |
| if (check) not = !not; |
| continue; |
| // 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[5] ? 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") |
| || !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; |
| } |
| } |
| |
| if (check) { |
| test = !fnmatch(arg, name, FNM_PATHNAME*(s[i] == 'p')); |
| free(path); |
| if (i) free(name); |
| } |
| } 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) { |
| int types[] = {S_IFBLK, S_IFCHR, S_IFDIR, S_IFLNK, S_IFIFO, |
| S_IFREG, S_IFSOCK}, i = stridx("bcdlpfs", *ss[1]); |
| |
| if (i<0) error_exit("bad -type '%c'", *ss[1]); |
| if ((new->st.st_mode & S_IFMT) != types[i]) 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, "mindepth") || !strcmp(s, "maxdepth")) { |
| if (check) { |
| struct dirtree *dt = new; |
| int i = 0, d = atolx(ss[1]); |
| |
| while ((dt = dt->parent)) i++; |
| if (s[1] == 'i') { |
| test = i >= d; |
| if (i == d && not) recurse = 0; |
| } else { |
| test = i <= d; |
| if (i == d && !not) recurse = 0; |
| } |
| } |
| } else if (!strcmp(s, "user") || !strcmp(s, "group") |
| || !strcmp(s, "newer")) |
| { |
| struct { |
| void *next, *prev; |
| union { |
| uid_t uid; |
| gid_t gid; |
| struct timespec tm; |
| } u; |
| } *udl; |
| |
| if (!new && ss[1]) { |
| udl = xmalloc(sizeof(*udl)); |
| dlist_add_nomalloc(&TT.argdata, (void *)udl); |
| |
| if (*s == 'u') udl->u.uid = xgetpwnamid(ss[1])->pw_uid; |
| else if (*s == 'g') udl->u.gid = xgetgrnamid(ss[1])->gr_gid; |
| else { |
| struct stat st; |
| |
| xstat(ss[1], &st); |
| udl->u.tm = st.st_mtim; |
| } |
| } else if (check) { |
| udl = (void *)llist_pop(&argdata); |
| if (*s == 'u') test = new->st.st_uid == udl->u.uid; |
| else if (*s == 'g') test = new->st.st_gid == udl->u.gid; |
| else { |
| test = new->st.st_mtim.tv_sec > udl->u.tm.tv_sec; |
| if (new->st.st_mtim.tv_sec == udl->u.tm.tv_sec) |
| test = new->st.st_mtim.tv_nsec > udl->u.tm.tv_nsec; |
| } |
| } |
| } else if (!strcmp(s, "exec") || !strcmp("ok", s) |
| || !strcmp(s, "execdir") || !strcmp(s, "okdir")) |
| { |
| struct exec_range *aa; |
| |
| print++; |
| |
| // Initial argument parsing pass |
| if (!new) { |
| int len; |
| |
| // catch "-exec" with no args and "-exec \;" |
| if (!ss[1] || !strcmp(ss[1], ";")) error_exit("'%s' needs 1 arg", s); |
| |
| dlist_add_nomalloc(&TT.argdata, (void *)(aa = xzalloc(sizeof(*aa)))); |
| aa->argstart = ++ss; |
| aa->curly = -1; |
| |
| // 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; |
| aa->arglen = len; |
| aa->dir = !!strchr(s, 'd'); |
| if (aa->dir && TT.topdir == -1) TT.topdir = xopen(".", 0); |
| |
| // collect names and execute commands |
| } else { |
| char *name, *ss1 = ss[1]; |
| struct double_list **ddl; |
| |
| // Grab command line exec argument list |
| aa = (void *)llist_pop(&argdata); |
| ss += aa->arglen + 1; |
| |
| if (!check) goto cont; |
| // 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 value for prev to have otherwise |
| if (aa->dir) aa->prev = (void *)1; |
| |
| if (*s == 'o') { |
| char *prompt = xmprintf("[%s] %s", ss1, name); |
| test = yesno(prompt, 0); |
| free(prompt); |
| if (!test) { |
| free(name); |
| goto cont; |
| } |
| } |
| |
| // Add next name to list (global list without -dir, local with) |
| if (aa->dir && new->parent) |
| ddl = (struct double_list **)&new->parent->extra; |
| else ddl = &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(ddl, name); |
| aa->namecount++; |
| if (!aa->plus) test = flush_exec(new, aa); |
| } |
| |
| // Argument consumed, skip the check. |
| goto cont; |
| } 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); |
| } |
| cont: |
| // Apply pending "!" to result |
| if (active && not) test = !test; |
| not = 0; |
| } |
| |
| if (new) { |
| // If there was no action, print |
| if (!print && test) do_print(new, '\n'); |
| } else dlist_terminate(TT.argdata); |
| |
| return recurse; |
| |
| error: |
| error_exit("bad arg '%s'", *ss); |
| } |
| |
| 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 (!len) { |
| 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++) |
| dirtree_handle_callback(dirtree_start(ss[i], toys.optflags&(FLAG_H|FLAG_L)), |
| do_find); |
| |
| if (CFG_TOYBOX_FREE) { |
| close(TT.topdir); |
| llist_traverse(TT.argdata, free); |
| } |
| } |
