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freebsd-nq/usr.bin/find/function.c
Jilles Tjoelker 9d6d5a7131 find: Allow -delete to delete files given as arguments. 
Formerly, a command like find dir1/dir2 -delete would delete everything
under dir1/dir2 but not dir1/dir2 itself.

When -L is not specified and "." can be opened, the fts(3) code underlying
find(1) is careful to avoid following symlinks or being dropped in different
locations by moving the directory fts is currently traversing. If a
problematic concurrent modification is detected, fts will not enter the
directory or abort. Files found in the search are returned via the current
working directory and a pathname not containing a slash.

For paranoia, find(1) verifies this when -delete is used. However, it is too
paranoid about the root of the traversal. It is already assumed that the
initial pathname does not refer to directories or symlinks that might be
replaced by untrusted users; otherwise, the whole traversal would be unsafe.
Therefore, it is not necessary to do the check for fts_level ==
FTS_ROOTLEVEL.

Deleting the pathnames given as arguments can be prevented without error
messages using -mindepth 1 or by changing directory and passing "." as
argument to find. This works in the old as well as the new version of find.

Tested by:	Kurt Lidl
Reviewed by:	jhb
2013-08-02 14:14:23 +00:00

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/*-
* 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("$FreeBSD$");
#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>
#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;
#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.tv_sec);
/*
* -[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.tv_sec);
} else if (plan->flags & F_TIME_A) {
COMPARE((now - entry->fts_statp->st_atime +
60 - 1) / 60, plan->t_data.tv_sec);
} else if (plan->flags & F_TIME_B) {
COMPARE((now - entry->fts_statp->st_birthtime +
60 - 1) / 60, plan->t_data.tv_sec);
} else {
COMPARE((now - entry->fts_statp->st_mtime +
60 - 1) / 60, plan->t_data.tv_sec);
}
}
PLAN *
c_Xmin(OPTION *option, char ***argvp)
{
char *nmins;
PLAN *new;
nmins = nextarg(option, argvp);
ftsoptions &= ~FTS_NOSTAT;
new = palloc(option);
new->t_data.tv_sec = find_parsenum(new, option->name, nmins, NULL);
new->t_data.tv_nsec = 0;
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.tv_sec);
else
COMPARE((now - xtime + 86400 - 1) / 86400, plan->t_data.tv_sec);
}
PLAN *
c_Xtime(OPTION *option, char ***argvp)
{
char *value;
PLAN *new;
value = nextarg(option, argvp);
ftsoptions &= ~FTS_NOSTAT;
new = palloc(option);
new->t_data.tv_sec = find_parsetime(new, option->name, value);
new->t_data.tv_nsec = 0;
if (!(new->flags & F_EXACTTIME))
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.
*/
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);
}
PLAN *
c_acl(OPTION *option, char ***argvp __unused)
{
ftsoptions &= ~FTS_NOSTAT;
return (palloc(option));
}
/*
* -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 (entry->fts_level > FTS_ROOTLEVEL &&
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 */
/*
* Try to avoid the confusing error message about relative paths
* being potentially not safe.
*/
if (ftsoptions & FTS_NOCHDIR)
errx(1, "%s: forbidden when the current directory cannot be opened",
"-delete");
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) &&
!(ftsoptions & FTS_NOCHDIR) && 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);
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;
/* This would defeat -execdir's intended security. */
if (option->flags & F_EXECDIR && ftsoptions & FTS_NOCHDIR)
errx(1, "%s: forbidden when the current directory cannot be opened",
"-execdir");
/* 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);
/*
* Ensure that -execdir ... {} + does not mix files
* from different directories in one invocation.
* Files from the same directory should be handled
* in one invocation but there is no code for it.
*/
new->e_pnummax = new->flags & F_EXECDIR ? 1 : 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, &notflags) == 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;
}
/*
* -ignore_readdir_race functions --
*
* Always true. Ignore errors which occur if a file or a directory
* in a starting point gets deleted between reading the name and calling
* stat on it while find is traversing the starting point.
*/
PLAN *
c_ignore_readdir_race(OPTION *option, char ***argvp __unused)
{
if (strcmp(option->name, "-ignore_readdir_race") == 0)
ignore_readdir_race = 1;
else
ignore_readdir_race = 0;
return palloc(option);
}
/*
* -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;
if (plan->flags & F_LINK) {
name = fn;
if (readlink(entry->fts_path, fn, sizeof(fn)) == -1)
return 0;
} 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)
{
struct timespec ft;
if (plan->flags & F_TIME_C)
ft = entry->fts_statp->st_ctim;
else if (plan->flags & F_TIME_A)
ft = entry->fts_statp->st_atim;
else if (plan->flags & F_TIME_B)
ft = entry->fts_statp->st_birthtim;
else
ft = entry->fts_statp->st_mtim;
return (ft.tv_sec > plan->t_data.tv_sec ||
(ft.tv_sec == plan->t_data.tv_sec &&
ft.tv_nsec > plan->t_data.tv_nsec));
}
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.tv_sec = get_date(fn_or_tspec);
if (new->t_data.tv_sec == (time_t) -1)
errx(1, "Can't parse date/time: %s", fn_or_tspec);
/* Use the seconds only in the comparison. */
new->t_data.tv_nsec = 999999999;
} else {
if (stat(fn_or_tspec, &sb))
err(1, "%s", fn_or_tspec);
if (option->flags & F_TIME2_C)
new->t_data = sb.st_ctim;
else if (option->flags & F_TIME2_A)
new->t_data = sb.st_atim;
else if (option->flags & F_TIME2_B)
new->t_data = sb.st_birthtim;
else
new->t_data = sb.st_mtim;
}
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 == '+') {
new->flags |= F_ANY;
++perm;
}
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;
}
/*
* -sparse functions --
*
* Check if a file is sparse by finding if it occupies fewer blocks
* than we expect based on its size.
*/
int
f_sparse(PLAN *plan __unused, FTSENT *entry)
{
off_t expected_blocks;
expected_blocks = (entry->fts_statp->st_size + 511) / 512;
return entry->fts_statp->st_blocks < expected_blocks;
}
PLAN *
c_sparse(OPTION *option, char ***argvp __unused)
{
ftsoptions &= ~FTS_NOSTAT;
return palloc(option);
}
/*
* -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 */
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