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b95de98a6b
freebsd-dev/usr.bin/find/function.c
Jilles Tjoelker b95de98a6b find: Allow -type d without statting everything. 
fts(3) detects directories even in FTS_NOSTAT mode (so it can descend into
them).

No functional change is intended, but find commands that use -type d but no
primaries that still require stat/lstat calls make considerably fewer system
calls.
2014-01-11 21:12:27 +00:00

1781 lines
38 KiB
C
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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;
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
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)
{
if (plan->m_data == S_IFDIR)
return (entry->fts_info == FTS_D || entry->fts_info == FTS_DC ||
entry->fts_info == FTS_DNR || entry->fts_info == FTS_DOT ||
entry->fts_info == FTS_DP);
else
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);
if (typestring[0] != 'd')
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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