diff options
Diffstat (limited to 'shell_cmds/find/function.c')
| -rw-r--r-- | shell_cmds/find/function.c | 1772 |
1 files changed, 1772 insertions, 0 deletions
diff --git a/shell_cmds/find/function.c b/shell_cmds/find/function.c new file mode 100644 index 0000000..a673a02 --- /dev/null +++ b/shell_cmds/find/function.c @@ -0,0 +1,1772 @@ +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Cimarron D. Taylor of the University of California, Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +#if 0 +static const char sccsid[] = "@(#)function.c 8.10 (Berkeley) 5/4/95"; +#endif +#endif /* not lint */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/find/function.c,v 1.71 2011/06/13 05:22:07 avatar Exp $"); + +#include <sys/param.h> +#include <sys/ucred.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <sys/acl.h> +#include <sys/wait.h> +#include <sys/mount.h> + +#include <dirent.h> +#include <err.h> +#include <errno.h> +#include <fnmatch.h> +#include <fts.h> +#include <grp.h> +#include <limits.h> +#include <pwd.h> +#include <regex.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <ctype.h> + +#ifdef __APPLE__ +#include <sys/sysctl.h> +#include <sys/xattr.h> +#include <libgen.h> +#include <get_compat.h> +#else +#define COMPAT_MODE(func, mode) 1 +#endif + +#include "find.h" + +static PLAN *palloc(OPTION *); +static long long find_parsenum(PLAN *, const char *, char *, char *); +static long long find_parsetime(PLAN *, const char *, char *); +static char *nextarg(OPTION *, char ***); + +extern char **environ; + +static PLAN *lastexecplus = NULL; +int execplus_error; + +#define COMPARE(a, b) do { \ + switch (plan->flags & F_ELG_MASK) { \ + case F_EQUAL: \ + return (a == b); \ + case F_LESSTHAN: \ + return (a < b); \ + case F_GREATER: \ + return (a > b); \ + default: \ + abort(); \ + } \ +} while(0) + +static PLAN * +palloc(OPTION *option) +{ + PLAN *new; + + if ((new = malloc(sizeof(PLAN))) == NULL) + err(1, NULL); + new->execute = option->execute; + new->flags = option->flags; + new->next = NULL; + return new; +} + +/* + * find_parsenum -- + * Parse a string of the form [+-]# and return the value. + */ +static long long +find_parsenum(PLAN *plan, const char *option, char *vp, char *endch) +{ + long long value; + char *endchar, *str; /* Pointer to character ending conversion. */ + + /* Determine comparison from leading + or -. */ + str = vp; + switch (*str) { + case '+': + ++str; + plan->flags |= F_GREATER; + break; + case '-': + ++str; + plan->flags |= F_LESSTHAN; + break; + default: + plan->flags |= F_EQUAL; + break; + } + + /* + * Convert the string with strtoq(). Note, if strtoq() returns zero + * and endchar points to the beginning of the string we know we have + * a syntax error. + */ + value = strtoq(str, &endchar, 10); + if (value == 0 && endchar == str) + errx(1, "%s: %s: illegal numeric value", option, vp); + if (endchar[0] && endch == NULL) + errx(1, "%s: %s: illegal trailing character", option, vp); + if (endch) + *endch = endchar[0]; + return value; +} + +/* + * find_parsetime -- + * Parse a string of the form [+-]([0-9]+[smhdw]?)+ and return the value. + */ +static long long +find_parsetime(PLAN *plan, const char *option, char *vp) +{ + long long secs, value; + char *str, *unit; /* Pointer to character ending conversion. */ + + /* Determine comparison from leading + or -. */ + str = vp; + switch (*str) { + case '+': + ++str; + plan->flags |= F_GREATER; + break; + case '-': + ++str; + plan->flags |= F_LESSTHAN; + break; + default: + plan->flags |= F_EQUAL; + break; + } + + value = strtoq(str, &unit, 10); + if (value == 0 && unit == str) { + errx(1, "%s: %s: illegal time value", option, vp); + /* NOTREACHED */ + } + if (*unit == '\0') + return value; + + /* Units syntax. */ + secs = 0; + for (;;) { + switch(*unit) { + case 's': /* seconds */ + secs += value; + break; + case 'm': /* minutes */ + secs += value * 60; + break; + case 'h': /* hours */ + secs += value * 3600; + break; + case 'd': /* days */ + secs += value * 86400; + break; + case 'w': /* weeks */ + secs += value * 604800; + break; + default: + errx(1, "%s: %s: bad unit '%c'", option, vp, *unit); + /* NOTREACHED */ + } + str = unit + 1; + if (*str == '\0') /* EOS */ + break; + value = strtoq(str, &unit, 10); + if (value == 0 && unit == str) { + errx(1, "%s: %s: illegal time value", option, vp); + /* NOTREACHED */ + } + if (*unit == '\0') { + errx(1, "%s: %s: missing trailing unit", option, vp); + /* NOTREACHED */ + } + } + plan->flags |= F_EXACTTIME; + return secs; +} + +/* + * nextarg -- + * Check that another argument still exists, return a pointer to it, + * and increment the argument vector pointer. + */ +static char * +nextarg(OPTION *option, char ***argvp) +{ + char *arg; + + if ((arg = **argvp) == 0) + errx(1, "%s: requires additional arguments", option->name); + (*argvp)++; + return arg; +} /* nextarg() */ + +/* + * The value of n for the inode times (atime, birthtime, ctime, mtime) is a + * range, i.e. n matches from (n - 1) to n 24 hour periods. This interacts + * with -n, such that "-mtime -1" would be less than 0 days, which isn't what + * the user wanted. Correct so that -1 is "less than 1". + */ +#define TIME_CORRECT(p) \ + if (((p)->flags & F_ELG_MASK) == F_LESSTHAN) \ + ++((p)->t_data); + +/* + * -[acm]min n functions -- + * + * True if the difference between the + * file access time (-amin) + * file birth time (-Bmin) + * last change of file status information (-cmin) + * file modification time (-mmin) + * and the current time is n min periods. + */ +int +f_Xmin(PLAN *plan, FTSENT *entry) +{ + if (plan->flags & F_TIME_C) { + COMPARE((now - entry->fts_statp->st_ctime + + 60 - 1) / 60, plan->t_data); + } else if (plan->flags & F_TIME_A) { + COMPARE((now - entry->fts_statp->st_atime + + 60 - 1) / 60, plan->t_data); + } else if (plan->flags & F_TIME_B) { + COMPARE((now - entry->fts_statp->st_birthtime + + 60 - 1) / 60, plan->t_data); + } else { + COMPARE((now - entry->fts_statp->st_mtime + + 60 - 1) / 60, plan->t_data); + } +} + +PLAN * +c_Xmin(OPTION *option, char ***argvp) +{ + char *nmins; + PLAN *new; + + nmins = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + new->t_data = find_parsenum(new, option->name, nmins, NULL); + TIME_CORRECT(new); + return new; +} + +/* + * -[acm]time n functions -- + * + * True if the difference between the + * file access time (-atime) + * file birth time (-Btime) + * last change of file status information (-ctime) + * file modification time (-mtime) + * and the current time is n 24 hour periods. + */ + +int +f_Xtime(PLAN *plan, FTSENT *entry) +{ + time_t xtime; + + if (plan->flags & F_TIME_A) + xtime = entry->fts_statp->st_atime; + else if (plan->flags & F_TIME_B) + xtime = entry->fts_statp->st_birthtime; + else if (plan->flags & F_TIME_C) + xtime = entry->fts_statp->st_ctime; + else + xtime = entry->fts_statp->st_mtime; + + if (plan->flags & F_EXACTTIME) + COMPARE(now - xtime, plan->t_data); + else + COMPARE((now - xtime + (COMPAT_MODE("bin/find", "unix2003") ? 0 : 86400 - 1)) / 86400, plan->t_data); +} + +PLAN * +c_Xtime(OPTION *option, char ***argvp) +{ + char *value; + PLAN *new; + + value = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + new->t_data = find_parsetime(new, option->name, value); + if (!(new->flags & F_EXACTTIME) && !COMPAT_MODE("bin/find", "unix2003")) + TIME_CORRECT(new); + return new; +} + +/* + * -maxdepth/-mindepth n functions -- + * + * Does the same as -prune if the level of the current file is + * greater/less than the specified maximum/minimum depth. + * + * Note that -maxdepth and -mindepth are handled specially in + * find_execute() so their f_* functions are set to f_always_true(). + */ +PLAN * +c_mXXdepth(OPTION *option, char ***argvp) +{ + char *dstr; + PLAN *new; + + dstr = nextarg(option, argvp); + if (dstr[0] == '-') + /* all other errors handled by find_parsenum() */ + errx(1, "%s: %s: value must be positive", option->name, dstr); + + new = palloc(option); + if (option->flags & F_MAXDEPTH) + maxdepth = find_parsenum(new, option->name, dstr, NULL); + else + mindepth = find_parsenum(new, option->name, dstr, NULL); + return new; +} + +/* + * -acl function -- + * + * Show files with EXTENDED ACL attributes. + */ +#ifdef __APPLE__ +int +f_acl(PLAN *plan __unused, FTSENT *entry) +{ + acl_t facl; + int match; + acl_entry_t ae; + + match = 0; + if ((facl = acl_get_link_np(entry->fts_accpath, ACL_TYPE_EXTENDED)) != NULL) { + if (acl_get_entry(facl, ACL_FIRST_ENTRY, &ae) == 0) { + match = 1; + } + acl_free(facl); + } + return match; +} +#else /* !__APPLE__ */ +int +f_acl(PLAN *plan __unused, FTSENT *entry) +{ + acl_t facl; + acl_type_t acl_type; + int acl_supported = 0, ret, trivial; + + if (S_ISLNK(entry->fts_statp->st_mode)) + return 0; + ret = pathconf(entry->fts_accpath, _PC_ACL_NFS4); + if (ret > 0) { + acl_supported = 1; + acl_type = ACL_TYPE_NFS4; + } else if (ret < 0 && errno != EINVAL) { + warn("%s", entry->fts_accpath); + return (0); + } + if (acl_supported == 0) { + ret = pathconf(entry->fts_accpath, _PC_ACL_EXTENDED); + if (ret > 0) { + acl_supported = 1; + acl_type = ACL_TYPE_ACCESS; + } else if (ret < 0 && errno != EINVAL) { + warn("%s", entry->fts_accpath); + return (0); + } + } + if (acl_supported == 0) + return (0); + + facl = acl_get_file(entry->fts_accpath, acl_type); + if (facl == NULL) { + warn("%s", entry->fts_accpath); + return (0); + } + ret = acl_is_trivial_np(facl, &trivial); + acl_free(facl); + if (ret) { + warn("%s", entry->fts_accpath); + acl_free(facl); + return (0); + } + if (trivial) + return (0); + return (1); +} +#endif /* __APPLE__ */ + +PLAN * +c_acl(OPTION *option, char ***argvp __unused) +{ +#ifndef __APPLE__ + ftsoptions &= ~FTS_NOSTAT; +#endif /* !__APPLE__ */ + return (palloc(option)); +} + +#ifdef __APPLE__ +int +f_xattr(PLAN *plan __unused, FTSENT *entry) +{ + ssize_t xattr; + int match; + + match = 0; + xattr = listxattr(entry->fts_accpath, NULL, 0, XATTR_NOFOLLOW); + if (xattr > 0) { + match = 1; + } + return match; +} + +int +f_xattrname(PLAN *plan, FTSENT *entry) +{ + ssize_t xattr; + int match; + + match = 0; + xattr = getxattr(entry->fts_accpath, plan->c_data, NULL, 0, 0, XATTR_NOFOLLOW); + if (xattr > 0) { + match = 1; + } + return match; +} +#endif /* __APPLE__ */ + +/* + * -delete functions -- + * + * True always. Makes its best shot and continues on regardless. + */ +int +f_delete(PLAN *plan __unused, FTSENT *entry) +{ + /* ignore these from fts */ + if (strcmp(entry->fts_accpath, ".") == 0 || + strcmp(entry->fts_accpath, "..") == 0) + return 1; + + /* sanity check */ + if (isdepth == 0 || /* depth off */ + (ftsoptions & FTS_NOSTAT)) /* not stat()ing */ + errx(1, "-delete: insecure options got turned on"); + + if (!(ftsoptions & FTS_PHYSICAL) || /* physical off */ + (ftsoptions & FTS_LOGICAL)) /* or finally, logical on */ + errx(1, "-delete: forbidden when symlinks are followed"); + + /* Potentially unsafe - do not accept relative paths whatsoever */ + if (strchr(entry->fts_accpath, '/') != NULL) + errx(1, "-delete: %s: relative path potentially not safe", + entry->fts_accpath); + + /* Turn off user immutable bits if running as root */ + if ((entry->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && + !(entry->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && + geteuid() == 0) + lchflags(entry->fts_accpath, + entry->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)); + + /* rmdir directories, unlink everything else */ + if (S_ISDIR(entry->fts_statp->st_mode)) { + if (rmdir(entry->fts_accpath) < 0 && errno != ENOTEMPTY) + warn("-delete: rmdir(%s)", entry->fts_path); + } else { + if (unlink(entry->fts_accpath) < 0) + warn("-delete: unlink(%s)", entry->fts_path); + } + + /* "succeed" */ + return 1; +} + +PLAN * +c_delete(OPTION *option, char ***argvp __unused) +{ + + ftsoptions &= ~FTS_NOSTAT; /* no optimise */ + isoutput = 1; /* possible output */ + isdepth = 1; /* -depth implied */ + + return palloc(option); +} + + +/* + * always_true -- + * + * Always true, used for -maxdepth, -mindepth, -xdev, -follow, and -true + */ +int +f_always_true(PLAN *plan __unused, FTSENT *entry __unused) +{ + return 1; +} + +/* + * -depth functions -- + * + * With argument: True if the file is at level n. + * Without argument: Always true, causes descent of the directory hierarchy + * to be done so that all entries in a directory are acted on before the + * directory itself. + */ +int +f_depth(PLAN *plan, FTSENT *entry) +{ + if (plan->flags & F_DEPTH) + COMPARE(entry->fts_level, plan->d_data); + else + return 1; +} + +PLAN * +c_depth(OPTION *option, char ***argvp) +{ + PLAN *new; + char *str; + + new = palloc(option); + + str = **argvp; + if (str && !(new->flags & F_DEPTH)) { + /* skip leading + or - */ + if (*str == '+' || *str == '-') + str++; + /* skip sign */ + if (*str == '+' || *str == '-') + str++; + if (isdigit(*str)) + new->flags |= F_DEPTH; + } + + if (new->flags & F_DEPTH) { /* -depth n */ + char *ndepth; + + ndepth = nextarg(option, argvp); + new->d_data = find_parsenum(new, option->name, ndepth, NULL); + } else { /* -d */ + isdepth = 1; + } + + return new; +} + +/* + * -empty functions -- + * + * True if the file or directory is empty + */ +int +f_empty(PLAN *plan __unused, FTSENT *entry) +{ + if (S_ISREG(entry->fts_statp->st_mode) && + entry->fts_statp->st_size == 0) + return 1; + if (S_ISDIR(entry->fts_statp->st_mode)) { + struct dirent *dp; + int empty; + DIR *dir; + + empty = 1; + dir = opendir(entry->fts_accpath); + if (dir == NULL) + return 0; + for (dp = readdir(dir); dp; dp = readdir(dir)) + if (dp->d_name[0] != '.' || + (dp->d_name[1] != '\0' && + (dp->d_name[1] != '.' || dp->d_name[2] != '\0'))) { + empty = 0; + break; + } + closedir(dir); + return empty; + } + return 0; +} + +PLAN * +c_empty(OPTION *option, char ***argvp __unused) +{ + ftsoptions &= ~FTS_NOSTAT; + + return palloc(option); +} + +/* + * [-exec | -execdir | -ok] utility [arg ... ] ; functions -- + * + * True if the executed utility returns a zero value as exit status. + * The end of the primary expression is delimited by a semicolon. If + * "{}" occurs anywhere, it gets replaced by the current pathname, + * or, in the case of -execdir, the current basename (filename + * without leading directory prefix). For -exec and -ok, + * the current directory for the execution of utility is the same as + * the current directory when the find utility was started, whereas + * for -execdir, it is the directory the file resides in. + * + * The primary -ok differs from -exec in that it requests affirmation + * of the user before executing the utility. + */ +int +f_exec(PLAN *plan, FTSENT *entry) +{ + int cnt; + pid_t pid; + int status; + char *file; + + if (entry == NULL && plan->flags & F_EXECPLUS) { + if (plan->e_ppos == plan->e_pbnum) + return (1); + plan->e_argv[plan->e_ppos] = NULL; + goto doexec; + } + + /* XXX - if file/dir ends in '/' this will not work -- can it? */ + if ((plan->flags & F_EXECDIR) && \ + (file = strrchr(entry->fts_path, '/'))) + file++; + else + file = entry->fts_path; + + if (plan->flags & F_EXECPLUS) { + if ((plan->e_argv[plan->e_ppos] = strdup(file)) == NULL) + err(1, NULL); + plan->e_len[plan->e_ppos] = strlen(file); + plan->e_psize += plan->e_len[plan->e_ppos]; + if (++plan->e_ppos < plan->e_pnummax && + plan->e_psize < plan->e_psizemax) + return (1); + plan->e_argv[plan->e_ppos] = NULL; + } else { + for (cnt = 0; plan->e_argv[cnt]; ++cnt) + if (plan->e_len[cnt]) + brace_subst(plan->e_orig[cnt], + &plan->e_argv[cnt], file, + plan->e_len[cnt]); + } + +doexec: if ((plan->flags & F_NEEDOK) && !queryuser(plan->e_argv)) + return 0; + + /* make sure find output is interspersed correctly with subprocesses */ + fflush(stdout); + fflush(stderr); + + switch (pid = fork()) { + case -1: + err(1, "fork"); + /* NOTREACHED */ + case 0: + /* change dir back from where we started */ + if (!(plan->flags & F_EXECDIR) && fchdir(dotfd)) { + warn("chdir"); + _exit(1); + } + execvp(plan->e_argv[0], plan->e_argv); + warn("%s", plan->e_argv[0]); + _exit(1); + } + if (plan->flags & F_EXECPLUS) { + while (--plan->e_ppos >= plan->e_pbnum) + free(plan->e_argv[plan->e_ppos]); + plan->e_ppos = plan->e_pbnum; + plan->e_psize = plan->e_pbsize; + } + pid = waitpid(pid, &status, 0); + if (plan->flags & F_EXECPLUS && WIFEXITED(status) && WEXITSTATUS(status) && !execplus_error) { + /* Test 140 (8907531, 10656525) */ + execplus_error = WEXITSTATUS(status); + } + return (pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status)); +} + +/* + * c_exec, c_execdir, c_ok -- + * build three parallel arrays, one with pointers to the strings passed + * on the command line, one with (possibly duplicated) pointers to the + * argv array, and one with integer values that are lengths of the + * strings, but also flags meaning that the string has to be massaged. + */ +PLAN * +c_exec(OPTION *option, char ***argvp) +{ + PLAN *new; /* node returned */ + long argmax; + int cnt, i; + char **argv, **ap, **ep, *p; + + /* XXX - was in c_execdir, but seems unnecessary!? + ftsoptions &= ~FTS_NOSTAT; + */ + isoutput = 1; + + /* XXX - this is a change from the previous coding */ + new = palloc(option); + + for (ap = argv = *argvp;; ++ap) { + if (!*ap) + errx(1, + "%s: no terminating \";\" or \"+\"", option->name); + if (**ap == ';') + break; + if (**ap == '+' && ap != argv && strcmp(*(ap - 1), "{}") == 0) { + new->flags |= F_EXECPLUS; + break; + } + } + + if (ap == argv) + errx(1, "%s: no command specified", option->name); + + cnt = ap - *argvp + 1; + if (new->flags & F_EXECPLUS) { + new->e_ppos = new->e_pbnum = cnt - 2; + if ((argmax = sysconf(_SC_ARG_MAX)) == -1) { + warn("sysconf(_SC_ARG_MAX)"); + argmax = _POSIX_ARG_MAX; + } + argmax -= 1024; + for (ep = environ; *ep != NULL; ep++) + argmax -= strlen(*ep) + 1 + sizeof(*ep); + argmax -= 1 + sizeof(*ep); + new->e_pnummax = argmax / 16; + argmax -= sizeof(char *) * new->e_pnummax; + if (argmax <= 0) + errx(1, "no space for arguments"); + new->e_psizemax = argmax; + new->e_pbsize = 0; + cnt += new->e_pnummax + 1; + new->e_next = lastexecplus; + lastexecplus = new; + } + if ((new->e_argv = malloc(cnt * sizeof(char *))) == NULL) + err(1, NULL); + if ((new->e_orig = malloc(cnt * sizeof(char *))) == NULL) + err(1, NULL); + if ((new->e_len = malloc(cnt * sizeof(int))) == NULL) + err(1, NULL); + + for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) { + new->e_orig[cnt] = *argv; + if (new->flags & F_EXECPLUS) + new->e_pbsize += strlen(*argv) + 1; + for (p = *argv; *p; ++p) + if (!(new->flags & F_EXECPLUS) && p[0] == '{' && + p[1] == '}') { + if ((new->e_argv[cnt] = + malloc(MAXPATHLEN)) == NULL) + err(1, NULL); + new->e_len[cnt] = MAXPATHLEN; + break; + } + if (!*p) { + new->e_argv[cnt] = *argv; + new->e_len[cnt] = 0; + } + } + if (new->flags & F_EXECPLUS) { + new->e_psize = new->e_pbsize; + cnt--; + for (i = 0; i < new->e_pnummax; i++) { + new->e_argv[cnt] = NULL; + new->e_len[cnt] = 0; + cnt++; + } + argv = ap; + goto done; + } + new->e_argv[cnt] = new->e_orig[cnt] = NULL; + +done: *argvp = argv + 1; + return new; +} + +/* Finish any pending -exec ... {} + functions. */ +void +finish_execplus(void) +{ + PLAN *p; + + p = lastexecplus; + while (p != NULL) { + (p->execute)(p, NULL); + p = p->e_next; + } +} + +int +f_flags(PLAN *plan, FTSENT *entry) +{ + u_long flags; + + flags = entry->fts_statp->st_flags; + if (plan->flags & F_ATLEAST) + return (flags | plan->fl_flags) == flags && + !(flags & plan->fl_notflags); + else if (plan->flags & F_ANY) + return (flags & plan->fl_flags) || + (flags | plan->fl_notflags) != flags; + else + return flags == plan->fl_flags && + !(plan->fl_flags & plan->fl_notflags); +} + +PLAN * +c_flags(OPTION *option, char ***argvp) +{ + char *flags_str; + PLAN *new; + u_long flags, notflags; + + flags_str = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + + if (*flags_str == '-') { + new->flags |= F_ATLEAST; + flags_str++; + } else if (*flags_str == '+') { + new->flags |= F_ANY; + flags_str++; + } + if (strtofflags(&flags_str, &flags, ¬flags) == 1) + errx(1, "%s: %s: illegal flags string", option->name, flags_str); + + new->fl_flags = flags; + new->fl_notflags = notflags; + return new; +} + +/* + * -follow functions -- + * + * Always true, causes symbolic links to be followed on a global + * basis. + */ +PLAN * +c_follow(OPTION *option, char ***argvp __unused) +{ + ftsoptions &= ~FTS_PHYSICAL; + ftsoptions |= FTS_LOGICAL; + + return palloc(option); +} + +/* + * -fstype functions -- + * + * True if the file is of a certain type. + */ +int +f_fstype(PLAN *plan, FTSENT *entry) +{ + static dev_t curdev; /* need a guaranteed illegal dev value */ + static int first = 1; + struct statfs sb; + static int val_flags; + static char fstype[sizeof(sb.f_fstypename)]; + char *p, save[2] = {0,0}; + + if ((plan->flags & F_MTMASK) == F_MTUNKNOWN) + return 0; + + /* Only check when we cross mount point. */ + if (first || curdev != entry->fts_statp->st_dev) { + curdev = entry->fts_statp->st_dev; + + /* + * Statfs follows symlinks; find wants the link's filesystem, + * not where it points. + */ + if (entry->fts_info == FTS_SL || + entry->fts_info == FTS_SLNONE) { + if ((p = strrchr(entry->fts_accpath, '/')) != NULL) + ++p; + else + p = entry->fts_accpath; + save[0] = p[0]; + p[0] = '.'; + save[1] = p[1]; + p[1] = '\0'; + } else + p = NULL; + + if (statfs(entry->fts_accpath, &sb)) + err(1, "%s", entry->fts_accpath); + + if (p) { + p[0] = save[0]; + p[1] = save[1]; + } + + first = 0; + + /* + * Further tests may need both of these values, so + * always copy both of them. + */ + val_flags = sb.f_flags; + strlcpy(fstype, sb.f_fstypename, sizeof(fstype)); + } + switch (plan->flags & F_MTMASK) { + case F_MTFLAG: + return val_flags & plan->mt_data; + case F_MTTYPE: + return (strncmp(fstype, plan->c_data, sizeof(fstype)) == 0); + default: + abort(); + } +} + +PLAN * +c_fstype(OPTION *option, char ***argvp) +{ + char *fsname; + PLAN *new; + + fsname = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + switch (*fsname) { + case 'l': + if (!strcmp(fsname, "local")) { + new->flags |= F_MTFLAG; + new->mt_data = MNT_LOCAL; + return new; + } + break; + case 'r': + if (!strcmp(fsname, "rdonly")) { + new->flags |= F_MTFLAG; + new->mt_data = MNT_RDONLY; + return new; + } + break; + } + + new->flags |= F_MTTYPE; + new->c_data = fsname; + return new; +} + +/* + * -group gname functions -- + * + * True if the file belongs to the group gname. If gname is numeric and + * an equivalent of the getgrnam() function does not return a valid group + * name, gname is taken as a group ID. + */ +int +f_group(PLAN *plan, FTSENT *entry) +{ + COMPARE(entry->fts_statp->st_gid, plan->g_data); +} + +PLAN * +c_group(OPTION *option, char ***argvp) +{ + char *gname; + PLAN *new; + struct group *g; + gid_t gid; + + gname = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + g = getgrnam(gname); + if (g == NULL) { + char* cp = gname; + if (gname[0] == '-' || gname[0] == '+') + gname++; + gid = atoi(gname); + if (gid == 0 && gname[0] != '0') + errx(1, "%s: %s: no such group", option->name, gname); + gid = find_parsenum(new, option->name, cp, NULL); + } else + gid = g->gr_gid; + + new->g_data = gid; + return new; +} + +/* + * -inum n functions -- + * + * True if the file has inode # n. + */ +int +f_inum(PLAN *plan, FTSENT *entry) +{ + COMPARE(entry->fts_statp->st_ino, plan->i_data); +} + +PLAN * +c_inum(OPTION *option, char ***argvp) +{ + char *inum_str; + PLAN *new; + + inum_str = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + new->i_data = find_parsenum(new, option->name, inum_str, NULL); + return new; +} + +/* + * -samefile FN + * + * True if the file has the same inode (eg hard link) FN + */ + +/* f_samefile is just f_inum */ +PLAN * +c_samefile(OPTION *option, char ***argvp) +{ + char *fn; + PLAN *new; + struct stat sb; + + fn = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + if (stat(fn, &sb)) + err(1, "%s", fn); + new->i_data = sb.st_ino; + return new; +} + +/* + * -links n functions -- + * + * True if the file has n links. + */ +int +f_links(PLAN *plan, FTSENT *entry) +{ + COMPARE(entry->fts_statp->st_nlink, plan->l_data); +} + +PLAN * +c_links(OPTION *option, char ***argvp) +{ + char *nlinks; + PLAN *new; + + nlinks = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + new->l_data = (nlink_t)find_parsenum(new, option->name, nlinks, NULL); + return new; +} + +/* + * -ls functions -- + * + * Always true - prints the current entry to stdout in "ls" format. + */ +int +f_ls(PLAN *plan __unused, FTSENT *entry) +{ + printlong(entry->fts_path, entry->fts_accpath, entry->fts_statp); + return 1; +} + +PLAN * +c_ls(OPTION *option, char ***argvp __unused) +{ + ftsoptions &= ~FTS_NOSTAT; + isoutput = 1; + + return palloc(option); +} + +/* + * -name functions -- + * + * True if the basename of the filename being examined + * matches pattern using Pattern Matching Notation S3.14 + */ +int +f_name(PLAN *plan, FTSENT *entry) +{ + char fn[PATH_MAX]; + const char *name; + ssize_t len; + + if (plan->flags & F_LINK) { + /* + * The below test both avoids obviously useless readlink() + * calls and ensures that symlinks with existent target do + * not match if symlinks are being followed. + * Assumption: fts will stat all symlinks that are to be + * followed and will return the stat information. + */ + if (entry->fts_info != FTS_NSOK && entry->fts_info != FTS_SL && + entry->fts_info != FTS_SLNONE) + return 0; + len = readlink(entry->fts_accpath, fn, sizeof(fn) - 1); + if (len == -1) + return 0; + fn[len] = '\0'; + name = fn; + } else if (entry->fts_namelen == 0) { + name = basename(entry->fts_path); + } else + name = entry->fts_name; + return !fnmatch(plan->c_data, name, + plan->flags & F_IGNCASE ? FNM_CASEFOLD : 0); +} + +PLAN * +c_name(OPTION *option, char ***argvp) +{ + char *pattern; + PLAN *new; + + pattern = nextarg(option, argvp); + new = palloc(option); + new->c_data = pattern; + return new; +} + +/* + * -newer file functions -- + * + * True if the current file has been modified more recently + * then the modification time of the file named by the pathname + * file. + */ +int +f_newer(PLAN *plan, FTSENT *entry) +{ + if (plan->flags & F_TIME_C) + return entry->fts_statp->st_ctime > plan->t_data; + else if (plan->flags & F_TIME_A) + return entry->fts_statp->st_atime > plan->t_data; + else if (plan->flags & F_TIME_B) + return entry->fts_statp->st_birthtime > plan->t_data; + else + return entry->fts_statp->st_mtime > plan->t_data; +} + +PLAN * +c_newer(OPTION *option, char ***argvp) +{ + char *fn_or_tspec; + PLAN *new; + struct stat sb; + + fn_or_tspec = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + /* compare against what */ + if (option->flags & F_TIME2_T) { + new->t_data = get_date(fn_or_tspec); + if (new->t_data == (time_t) -1) + errx(1, "Can't parse date/time: %s", fn_or_tspec); + } else { + if (stat(fn_or_tspec, &sb)) + err(1, "%s", fn_or_tspec); + if (option->flags & F_TIME2_C) + new->t_data = sb.st_ctime; + else if (option->flags & F_TIME2_A) + new->t_data = sb.st_atime; + else if (option->flags & F_TIME2_B) + new->t_data = sb.st_birthtime; + else + new->t_data = sb.st_mtime; + } + return new; +} + +/* + * -nogroup functions -- + * + * True if file belongs to a user ID for which the equivalent + * of the getgrnam() 9.2.1 [POSIX.1] function returns NULL. + */ +int +f_nogroup(PLAN *plan __unused, FTSENT *entry) +{ + return group_from_gid(entry->fts_statp->st_gid, 1) == NULL; +} + +PLAN * +c_nogroup(OPTION *option, char ***argvp __unused) +{ + ftsoptions &= ~FTS_NOSTAT; + + return palloc(option); +} + +/* + * -nouser functions -- + * + * True if file belongs to a user ID for which the equivalent + * of the getpwuid() 9.2.2 [POSIX.1] function returns NULL. + */ +int +f_nouser(PLAN *plan __unused, FTSENT *entry) +{ + return user_from_uid(entry->fts_statp->st_uid, 1) == NULL; +} + +PLAN * +c_nouser(OPTION *option, char ***argvp __unused) +{ + ftsoptions &= ~FTS_NOSTAT; + + return palloc(option); +} + +/* + * -path functions -- + * + * True if the path of the filename being examined + * matches pattern using Pattern Matching Notation S3.14 + */ +int +f_path(PLAN *plan, FTSENT *entry) +{ + return !fnmatch(plan->c_data, entry->fts_path, + plan->flags & F_IGNCASE ? FNM_CASEFOLD : 0); +} + +/* c_path is the same as c_name */ + +/* + * -perm functions -- + * + * The mode argument is used to represent file mode bits. If it starts + * with a leading digit, it's treated as an octal mode, otherwise as a + * symbolic mode. + */ +int +f_perm(PLAN *plan, FTSENT *entry) +{ + mode_t mode; + + mode = entry->fts_statp->st_mode & + (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO); + if (plan->flags & F_ATLEAST) + return (plan->m_data | mode) == mode; + else if (plan->flags & F_ANY) + return (mode & plan->m_data); + else + return mode == plan->m_data; + /* NOTREACHED */ +} + +PLAN * +c_perm(OPTION *option, char ***argvp) +{ + char *perm; + PLAN *new; + mode_t *set; + + perm = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + + if (*perm == '-') { + new->flags |= F_ATLEAST; + ++perm; + } else if (*perm == '+') { + if ((set = setmode(perm + 1)) != NULL) { + new->flags |= F_ANY; + ++perm; + free(set); + } + } + + if ((set = setmode(perm)) == NULL) + errx(1, "%s: %s: illegal mode string", option->name, perm); + + new->m_data = getmode(set, 0); + free(set); + return new; +} + +/* + * -print functions -- + * + * Always true, causes the current pathname to be written to + * standard output. + */ +int +f_print(PLAN *plan __unused, FTSENT *entry) +{ + (void)puts(entry->fts_path); + return 1; +} + +PLAN * +c_print(OPTION *option, char ***argvp __unused) +{ + isoutput = 1; + + return palloc(option); +} + +/* + * -print0 functions -- + * + * Always true, causes the current pathname to be written to + * standard output followed by a NUL character + */ +int +f_print0(PLAN *plan __unused, FTSENT *entry) +{ + fputs(entry->fts_path, stdout); + fputc('\0', stdout); + return 1; +} + +/* c_print0 is the same as c_print */ + +/* + * -prune functions -- + * + * Prune a portion of the hierarchy. + */ +int +f_prune(PLAN *plan __unused, FTSENT *entry) +{ + if (fts_set(tree, entry, FTS_SKIP)) + err(1, "%s", entry->fts_path); + return 1; +} + +/* c_prune == c_simple */ + +/* + * -regex functions -- + * + * True if the whole path of the file matches pattern using + * regular expression. + */ +int +f_regex(PLAN *plan, FTSENT *entry) +{ + char *str; + int len; + regex_t *pre; + regmatch_t pmatch; + int errcode; + char errbuf[LINE_MAX]; + int matched; + + pre = plan->re_data; + str = entry->fts_path; + len = strlen(str); + matched = 0; + + pmatch.rm_so = 0; + pmatch.rm_eo = len; + + errcode = regexec(pre, str, 1, &pmatch, REG_STARTEND); + + if (errcode != 0 && errcode != REG_NOMATCH) { + regerror(errcode, pre, errbuf, sizeof errbuf); + errx(1, "%s: %s", + plan->flags & F_IGNCASE ? "-iregex" : "-regex", errbuf); + } + + if (errcode == 0 && pmatch.rm_so == 0 && pmatch.rm_eo == len) + matched = 1; + + return matched; +} + +PLAN * +c_regex(OPTION *option, char ***argvp) +{ + PLAN *new; + char *pattern; + regex_t *pre; + int errcode; + char errbuf[LINE_MAX]; + + if ((pre = malloc(sizeof(regex_t))) == NULL) + err(1, NULL); + + pattern = nextarg(option, argvp); + + if ((errcode = regcomp(pre, pattern, + regexp_flags | (option->flags & F_IGNCASE ? REG_ICASE : 0))) != 0) { + regerror(errcode, pre, errbuf, sizeof errbuf); + errx(1, "%s: %s: %s", + option->flags & F_IGNCASE ? "-iregex" : "-regex", + pattern, errbuf); + } + + new = palloc(option); + new->re_data = pre; + + return new; +} + +/* c_simple covers c_prune, c_openparen, c_closeparen, c_not, c_or, c_true, c_false */ + +PLAN * +c_simple(OPTION *option, char ***argvp __unused) +{ + return palloc(option); +} + +/* + * -size n[c] functions -- + * + * True if the file size in bytes, divided by an implementation defined + * value and rounded up to the next integer, is n. If n is followed by + * one of c k M G T P, the size is in bytes, kilobytes, + * megabytes, gigabytes, terabytes or petabytes respectively. + */ +#define FIND_SIZE 512 +static int divsize = 1; + +int +f_size(PLAN *plan, FTSENT *entry) +{ + off_t size; + + size = divsize ? (entry->fts_statp->st_size + FIND_SIZE - 1) / + FIND_SIZE : entry->fts_statp->st_size; + COMPARE(size, plan->o_data); +} + +PLAN * +c_size(OPTION *option, char ***argvp) +{ + char *size_str; + PLAN *new; + char endch; + off_t scale; + + size_str = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + endch = 'c'; + new->o_data = find_parsenum(new, option->name, size_str, &endch); + if (endch != '\0') { + divsize = 0; + + switch (endch) { + case 'c': /* characters */ + scale = 0x1LL; + break; + case 'k': /* kilobytes 1<<10 */ + scale = 0x400LL; + break; + case 'M': /* megabytes 1<<20 */ + scale = 0x100000LL; + break; + case 'G': /* gigabytes 1<<30 */ + scale = 0x40000000LL; + break; + case 'T': /* terabytes 1<<40 */ + scale = 0x1000000000LL; + break; + case 'P': /* petabytes 1<<50 */ + scale = 0x4000000000000LL; + break; + default: + errx(1, "%s: %s: illegal trailing character", + option->name, size_str); + break; + } + if (new->o_data > QUAD_MAX / scale) + errx(1, "%s: %s: value too large", + option->name, size_str); + new->o_data *= scale; + } + return new; +} + +/* + * -type c functions -- + * + * True if the type of the file is c, where c is b, c, d, p, f or w + * for block special file, character special file, directory, FIFO, + * regular file or whiteout respectively. + */ +int +f_type(PLAN *plan, FTSENT *entry) +{ + return (entry->fts_statp->st_mode & S_IFMT) == plan->m_data; +} + +PLAN * +c_type(OPTION *option, char ***argvp) +{ + char *typestring; + PLAN *new; + mode_t mask; + + typestring = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + switch (typestring[0]) { + case 'b': + mask = S_IFBLK; + break; + case 'c': + mask = S_IFCHR; + break; + case 'd': + mask = S_IFDIR; + break; + case 'f': + mask = S_IFREG; + break; + case 'l': + mask = S_IFLNK; + break; + case 'p': + mask = S_IFIFO; + break; + case 's': + mask = S_IFSOCK; + break; +#ifdef FTS_WHITEOUT + case 'w': + mask = S_IFWHT; + ftsoptions |= FTS_WHITEOUT; + break; +#endif /* FTS_WHITEOUT */ + default: + errx(1, "%s: %s: unknown type", option->name, typestring); + } + + new = palloc(option); + new->m_data = mask; + return new; +} + +/* + * -user uname functions -- + * + * True if the file belongs to the user uname. If uname is numeric and + * an equivalent of the getpwnam() S9.2.2 [POSIX.1] function does not + * return a valid user name, uname is taken as a user ID. + */ +int +f_user(PLAN *plan, FTSENT *entry) +{ + COMPARE(entry->fts_statp->st_uid, plan->u_data); +} + +PLAN * +c_user(OPTION *option, char ***argvp) +{ + char *username; + PLAN *new; + struct passwd *p; + uid_t uid; + + username = nextarg(option, argvp); + ftsoptions &= ~FTS_NOSTAT; + + new = palloc(option); + p = getpwnam(username); + if (p == NULL) { + char* cp = username; + if( username[0] == '-' || username[0] == '+' ) + username++; + uid = atoi(username); + if (uid == 0 && username[0] != '0') + errx(1, "%s: %s: no such user", option->name, username); + uid = find_parsenum(new, option->name, cp, NULL); + } else + uid = p->pw_uid; + + new->u_data = uid; + return new; +} + +/* + * -xdev functions -- + * + * Always true, causes find not to descend past directories that have a + * different device ID (st_dev, see stat() S5.6.2 [POSIX.1]) + */ +PLAN * +c_xdev(OPTION *option, char ***argvp __unused) +{ + ftsoptions |= FTS_XDEV; + + return palloc(option); +} + +/* + * ( expression ) functions -- + * + * True if expression is true. + */ +int +f_expr(PLAN *plan, FTSENT *entry) +{ + PLAN *p; + int state = 0; + + for (p = plan->p_data[0]; + p && (state = (p->execute)(p, entry)); p = p->next); + return state; +} + +/* + * f_openparen and f_closeparen nodes are temporary place markers. They are + * eliminated during phase 2 of find_formplan() --- the '(' node is converted + * to a f_expr node containing the expression and the ')' node is discarded. + * The functions themselves are only used as constants. + */ + +int +f_openparen(PLAN *plan __unused, FTSENT *entry __unused) +{ + abort(); +} + +int +f_closeparen(PLAN *plan __unused, FTSENT *entry __unused) +{ + abort(); +} + +/* c_openparen == c_simple */ +/* c_closeparen == c_simple */ + +/* + * AND operator. Since AND is implicit, no node is allocated. + */ +PLAN * +c_and(OPTION *option __unused, char ***argvp __unused) +{ + return NULL; +} + +/* + * ! expression functions -- + * + * Negation of a primary; the unary NOT operator. + */ +int +f_not(PLAN *plan, FTSENT *entry) +{ + PLAN *p; + int state = 0; + + for (p = plan->p_data[0]; + p && (state = (p->execute)(p, entry)); p = p->next); + return !state; +} + +/* c_not == c_simple */ + +/* + * expression -o expression functions -- + * + * Alternation of primaries; the OR operator. The second expression is + * not evaluated if the first expression is true. + */ +int +f_or(PLAN *plan, FTSENT *entry) +{ + PLAN *p; + int state = 0; + + for (p = plan->p_data[0]; + p && (state = (p->execute)(p, entry)); p = p->next); + + if (state) + return 1; + + for (p = plan->p_data[1]; + p && (state = (p->execute)(p, entry)); p = p->next); + return state; +} + +/* c_or == c_simple */ + +/* + * -false + * + * Always false. + */ +int +f_false(PLAN *plan __unused, FTSENT *entry __unused) +{ + return 0; +} + +/* c_false == c_simple */ + +/* + * -quit + * + * Exits the program + */ +int +f_quit(PLAN *plan __unused, FTSENT *entry __unused) +{ + exit(0); +} + +/* c_quit == c_simple */ |