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046627251a
freebsd-nq/usr.bin/find/function.c
Peter Wemm ed1a4621a2 Add the -empty flag, from OpenBSD. It returns true if the directory 
is empty.  There doesn't appear to be another easy way to do this.

mobile# mkdir foo
mobile# mkdir foo/bar
mobile# mkdir bar
mobile# find . -empty
./foo/bar
./bar
2001-01-23 11:16:50 +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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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";
#else
static const char rcsid[] =
"$FreeBSD$";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/stat.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 <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "find.h"
#define COMPARE(a, b) { \
switch (plan->flags) { \
case F_EQUAL: \
return (a == b); \
case F_LESSTHAN: \
return (a < b); \
case F_GREATER: \
return (a > b); \
default: \
abort(); \
} \
}
static PLAN *palloc __P((enum ntype, int (*) __P((PLAN *, FTSENT *))));
/*
* find_parsenum --
* Parse a string of the form [+-]# and return the value.
*/
static long long
find_parsenum(plan, option, vp, endch)
PLAN *plan;
char *option, *vp, *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 || endchar[0] != *endch))
errx(1, "%s: %s: illegal trailing character", option, vp);
if (endch)
*endch = endchar[0];
return (value);
}
/*
* The value of n for the inode times (atime, ctime, and 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, ttype) \
if ((p)->type == ttype && (p)->flags == F_LESSTHAN) \
++((p)->t_data);
/*
* -amin n functions --
*
* True if the difference between the file access time and the
* current time is n min periods.
*/
int
f_amin(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_atime +
60 - 1) / 60, plan->t_data);
}
PLAN *
c_amin(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_AMIN, f_amin);
new->t_data = find_parsenum(new, "-amin", arg, NULL);
TIME_CORRECT(new, N_AMIN);
return (new);
}
/*
* -atime n functions --
*
* True if the difference between the file access time and the
* current time is n 24 hour periods.
*/
int
f_atime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_atime +
86400 - 1) / 86400, plan->t_data);
}
PLAN *
c_atime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_ATIME, f_atime);
new->t_data = find_parsenum(new, "-atime", arg, NULL);
TIME_CORRECT(new, N_ATIME);
return (new);
}
/*
* -cmin n functions --
*
* True if the difference between the last change of file
* status information and the current time is n min periods.
*/
int
f_cmin(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_ctime +
60 - 1) / 60, plan->t_data);
}
PLAN *
c_cmin(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_CMIN, f_cmin);
new->t_data = find_parsenum(new, "-cmin", arg, NULL);
TIME_CORRECT(new, N_CMIN);
return (new);
}
/*
* -ctime n functions --
*
* True if the difference between the last change of file
* status information and the current time is n 24 hour periods.
*/
int
f_ctime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_ctime +
86400 - 1) / 86400, plan->t_data);
}
PLAN *
c_ctime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_CTIME, f_ctime);
new->t_data = find_parsenum(new, "-ctime", arg, NULL);
TIME_CORRECT(new, N_CTIME);
return (new);
}
/*
* -depth functions --
*
* 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_always_true(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (1);
}
PLAN *
c_depth()
{
isdepth = 1;
return (palloc(N_DEPTH, f_always_true));
}
/*
* [-exec | -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.
* The current directory for the execution of utility is the same as
* the current directory when the find utility was started.
*
* The primary -ok is different in that it requests affirmation of the
* user before executing the utility.
*/
int
f_exec(plan, entry)
register PLAN *plan;
FTSENT *entry;
{
extern int dotfd;
register int cnt;
pid_t pid;
int status;
for (cnt = 0; plan->e_argv[cnt]; ++cnt)
if (plan->e_len[cnt])
brace_subst(plan->e_orig[cnt], &plan->e_argv[cnt],
entry->fts_path, plan->e_len[cnt]);
if (plan->flags == F_NEEDOK && !queryuser(plan->e_argv))
return (0);
/* make sure find output is interspersed correctly with subprocesses */
fflush(stdout);
switch (pid = fork()) {
case -1:
err(1, "fork");
/* NOTREACHED */
case 0:
if (fchdir(dotfd)) {
warn("chdir");
_exit(1);
}
execvp(plan->e_argv[0], plan->e_argv);
warn("%s", plan->e_argv[0]);
_exit(1);
}
pid = waitpid(pid, &status, 0);
return (pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status));
}
/*
* c_exec --
* 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(argvp, isok)
char ***argvp;
int isok;
{
PLAN *new; /* node returned */
register int cnt;
register char **argv, **ap, *p;
isoutput = 1;
new = palloc(N_EXEC, f_exec);
if (isok)
new->flags = F_NEEDOK;
for (ap = argv = *argvp;; ++ap) {
if (!*ap)
errx(1,
"%s: no terminating \";\"", isok ? "-ok" : "-exec");
if (**ap == ';')
break;
}
cnt = ap - *argvp + 1;
new->e_argv = (char **)emalloc((u_int)cnt * sizeof(char *));
new->e_orig = (char **)emalloc((u_int)cnt * sizeof(char *));
new->e_len = (int *)emalloc((u_int)cnt * sizeof(int));
for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) {
new->e_orig[cnt] = *argv;
for (p = *argv; *p; ++p)
if (p[0] == '{' && p[1] == '}') {
new->e_argv[cnt] = emalloc((u_int)MAXPATHLEN);
new->e_len[cnt] = MAXPATHLEN;
break;
}
if (!*p) {
new->e_argv[cnt] = *argv;
new->e_len[cnt] = 0;
}
}
new->e_argv[cnt] = new->e_orig[cnt] = NULL;
*argvp = argv + 1;
return (new);
}
/*
* -empty functions --
*
* True if the file or directory is empty
*/
int
f_empty(plan, entry)
PLAN *plan;
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)
err(1, "%s", entry->fts_accpath);
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()
{
ftsoptions &= ~FTS_NOSTAT;
return (palloc(N_EMPTY, f_empty));
}
/*
* -execdir 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 unqualified pathname.
* The current directory for the execution of utility is the same as
* the directory where the file lives.
*/
int
f_execdir(plan, entry)
register PLAN *plan;
FTSENT *entry;
{
register int cnt;
pid_t pid;
int status;
char *file;
/* XXX - if file/dir ends in '/' this will not work -- can it? */
if ((file = strrchr(entry->fts_path, '/')))
file++;
else
file = entry->fts_path;
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]);
/* don't mix output of command with find output */
fflush(stdout);
fflush(stderr);
switch (pid = fork()) {
case -1:
err(1, "fork");
/* NOTREACHED */
case 0:
execvp(plan->e_argv[0], plan->e_argv);
warn("%s", plan->e_argv[0]);
_exit(1);
}
pid = waitpid(pid, &status, 0);
return (pid != -1 && WIFEXITED(status) && !WEXITSTATUS(status));
}
/*
* c_execdir --
* 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_execdir(argvp)
char ***argvp;
{
PLAN *new; /* node returned */
register int cnt;
register char **argv, **ap, *p;
ftsoptions &= ~FTS_NOSTAT;
isoutput = 1;
new = palloc(N_EXECDIR, f_execdir);
for (ap = argv = *argvp;; ++ap) {
if (!*ap)
errx(1,
"-execdir: no terminating \";\"");
if (**ap == ';')
break;
}
cnt = ap - *argvp + 1;
new->e_argv = (char **)emalloc((u_int)cnt * sizeof(char *));
new->e_orig = (char **)emalloc((u_int)cnt * sizeof(char *));
new->e_len = (int *)emalloc((u_int)cnt * sizeof(int));
for (argv = *argvp, cnt = 0; argv < ap; ++argv, ++cnt) {
new->e_orig[cnt] = *argv;
for (p = *argv; *p; ++p)
if (p[0] == '{' && p[1] == '}') {
new->e_argv[cnt] = emalloc((u_int)MAXPATHLEN);
new->e_len[cnt] = MAXPATHLEN;
break;
}
if (!*p) {
new->e_argv[cnt] = *argv;
new->e_len[cnt] = 0;
}
}
new->e_argv[cnt] = new->e_orig[cnt] = NULL;
*argvp = argv + 1;
return (new);
}
/*
* -follow functions --
*
* Always true, causes symbolic links to be followed on a global
* basis.
*/
PLAN *
c_follow()
{
ftsoptions &= ~FTS_PHYSICAL;
ftsoptions |= FTS_LOGICAL;
return (palloc(N_FOLLOW, f_always_true));
}
/*
* -fstype functions --
*
* True if the file is of a certain type.
*/
int
f_fstype(plan, entry)
PLAN *plan;
FTSENT *entry;
{
static dev_t curdev; /* need a guaranteed illegal dev value */
static int first = 1;
struct statfs sb;
static int val_type, val_flags;
char *p, save[2];
/* 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 file system,
* 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;
val_type = sb.f_type;
}
switch (plan->flags) {
case F_MTFLAG:
return (val_flags & plan->mt_data) != 0;
case F_MTTYPE:
return (val_type == plan->mt_data);
default:
abort();
}
}
#if !defined(__NetBSD__)
int
f_always_false(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (0);
}
PLAN *
c_fstype(arg)
char *arg;
{
register PLAN *new;
struct vfsconf vfc;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_FSTYPE, f_fstype);
/*
* Check first for a filesystem name.
*/
if (getvfsbyname(arg, &vfc) == 0) {
new->flags = F_MTTYPE;
new->mt_data = vfc.vfc_typenum;
return (new);
}
switch (*arg) {
case 'l':
if (!strcmp(arg, "local")) {
new->flags = F_MTFLAG;
new->mt_data = MNT_LOCAL;
return (new);
}
break;
case 'r':
if (!strcmp(arg, "rdonly")) {
new->flags = F_MTFLAG;
new->mt_data = MNT_RDONLY;
return (new);
}
break;
}
/*
* We need to make filesystem checks for filesystems
* that exists but aren't in the kernel work.
*/
fprintf(stderr, "Warning: Unknown filesystem type %s\n", arg);
free(new);
return (palloc(N_FSTYPE, f_always_false));
}
#endif
/*
* -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, entry)
PLAN *plan;
FTSENT *entry;
{
return (entry->fts_statp->st_gid == plan->g_data);
}
PLAN *
c_group(gname)
char *gname;
{
PLAN *new;
struct group *g;
gid_t gid;
ftsoptions &= ~FTS_NOSTAT;
g = getgrnam(gname);
if (g == NULL) {
gid = atoi(gname);
if (gid == 0 && gname[0] != '0')
errx(1, "-group: %s: no such group", gname);
} else
gid = g->gr_gid;
new = palloc(N_GROUP, f_group);
new->g_data = gid;
return (new);
}
/*
* -inum n functions --
*
* True if the file has inode # n.
*/
int
f_inum(plan, entry)
PLAN *plan;
FTSENT *entry;
{
COMPARE(entry->fts_statp->st_ino, plan->i_data);
}
PLAN *
c_inum(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_INUM, f_inum);
new->i_data = find_parsenum(new, "-inum", arg, NULL);
return (new);
}
/*
* -links n functions --
*
* True if the file has n links.
*/
int
f_links(plan, entry)
PLAN *plan;
FTSENT *entry;
{
COMPARE(entry->fts_statp->st_nlink, plan->l_data);
}
PLAN *
c_links(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_LINKS, f_links);
new->l_data = (nlink_t)find_parsenum(new, "-links", arg, NULL);
return (new);
}
/*
* -ls functions --
*
* Always true - prints the current entry to stdout in "ls" format.
*/
int
f_ls(plan, entry)
PLAN *plan;
FTSENT *entry;
{
printlong(entry->fts_path, entry->fts_accpath, entry->fts_statp);
return (1);
}
PLAN *
c_ls()
{
ftsoptions &= ~FTS_NOSTAT;
isoutput = 1;
return (palloc(N_LS, f_ls));
}
/*
* -maxdepth n functions --
*
* Does the same as -prune if the level of the current file is greater
* than the specified maximum depth.
*
* Note that -maxdepth and -mindepth are handled specially in
* find_execute() so their f_* functions here do nothing.
*/
int
f_maxdepth(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (1);
}
PLAN *
c_maxdepth(arg)
char *arg;
{
PLAN *new;
if (*arg == '-')
/* all other errors handled by find_parsenum() */
errx(1, "-maxdepth: %s: value must be positive", arg);
new = palloc(N_MAXDEPTH, f_maxdepth);
maxdepth = find_parsenum(new, "-maxdepth", arg, NULL);
return (new);
}
/*
* -mindepth n functions --
*
* True if the current file is at or deeper than the specified minimum
* depth.
*/
int
f_mindepth(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (1);
}
PLAN *
c_mindepth(arg)
char *arg;
{
PLAN *new;
if (*arg == '-')
/* all other errors handled by find_parsenum() */
errx(1, "-maxdepth: %s: value must be positive", arg);
new = palloc(N_MINDEPTH, f_mindepth);
mindepth = find_parsenum(new, "-mindepth", arg, NULL);
return (new);
}
/*
* -mtime n functions --
*
* True if the difference between the file modification time and the
* current time is n 24 hour periods.
*/
int
f_mtime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_mtime + 86400 - 1) /
86400, plan->t_data);
}
PLAN *
c_mtime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_MTIME, f_mtime);
new->t_data = find_parsenum(new, "-mtime", arg, NULL);
TIME_CORRECT(new, N_MTIME);
return (new);
}
/*
* -mmin n functions --
*
* True if the difference between the file modification time and the
* current time is n min periods.
*/
int
f_mmin(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statp->st_mtime + 60 - 1) /
60, plan->t_data);
}
PLAN *
c_mmin(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_MMIN, f_mmin);
new->t_data = find_parsenum(new, "-mmin", arg, NULL);
TIME_CORRECT(new, N_MMIN);
return (new);
}
/*
* -name functions --
*
* True if the basename of the filename being examined
* matches pattern using Pattern Matching Notation S3.14
*/
int
f_name(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (!fnmatch(plan->c_data, entry->fts_name, 0));
}
PLAN *
c_name(pattern)
char *pattern;
{
PLAN *new;
new = palloc(N_NAME, f_name);
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, entry)
PLAN *plan;
FTSENT *entry;
{
return (entry->fts_statp->st_mtime > plan->t_data);
}
PLAN *
c_newer(filename)
char *filename;
{
PLAN *new;
struct stat sb;
ftsoptions &= ~FTS_NOSTAT;
if (stat(filename, &sb))
err(1, "%s", filename);
new = palloc(N_NEWER, f_newer);
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, entry)
PLAN *plan;
FTSENT *entry;
{
return (group_from_gid(entry->fts_statp->st_gid, 1) ? 0 : 1);
}
PLAN *
c_nogroup()
{
ftsoptions &= ~FTS_NOSTAT;
return (palloc(N_NOGROUP, f_nogroup));
}
/*
* -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, entry)
PLAN *plan;
FTSENT *entry;
{
return (user_from_uid(entry->fts_statp->st_uid, 1) ? 0 : 1);
}
PLAN *
c_nouser()
{
ftsoptions &= ~FTS_NOSTAT;
return (palloc(N_NOUSER, f_nouser));
}
/*
* -path functions --
*
* True if the path of the filename being examined
* matches pattern using Pattern Matching Notation S3.14
*/
int
f_path(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return (!fnmatch(plan->c_data, entry->fts_path, 0));
}
PLAN *
c_path(pattern)
char *pattern;
{
PLAN *new;
new = palloc(N_NAME, f_path);
new->c_data = pattern;
return (new);
}
/*
* -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, entry)
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 (plan->m_data & mode);
else
return (mode == plan->m_data);
/* NOTREACHED */
}
PLAN *
c_perm(perm)
char *perm;
{
PLAN *new;
mode_t *set;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_PERM, f_perm);
if (*perm == '-') {
new->flags = F_ATLEAST;
++perm;
} else if (*perm == '+') {
new->flags = F_ANY;
++perm;
}
if ((set = setmode(perm)) == NULL)
errx(1, "-perm: %s: illegal mode string", perm);
new->m_data = getmode(set, 0);
free(set);
return (new);
}
/*
* -flags functions --
*
* The flags argument is used to represent file flags bits.
*/
int
f_flags(plan, entry)
PLAN *plan;
FTSENT *entry;
{
u_long flags;
flags = entry->fts_statp->st_flags &
(UF_NODUMP | UF_IMMUTABLE | UF_APPEND | UF_OPAQUE |
SF_ARCHIVED | SF_IMMUTABLE | SF_APPEND);
if (plan->flags == F_ATLEAST)
/* note that plan->fl_flags always is a subset of
plan->fl_mask */
return (flags & plan->fl_mask) == plan->fl_flags;
else
return flags == plan->fl_flags;
/* NOTREACHED */
}
PLAN *
c_flags(flags_str)
char *flags_str;
{
PLAN *new;
u_long flags, notflags;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_FLAGS, f_flags);
if (*flags_str == '-') {
new->flags = F_ATLEAST;
flags_str++;
}
if (strtofflags(&flags_str, &flags, &notflags) == 1)
errx(1, "-flags: %s: illegal flags string", flags_str);
new->fl_flags = flags;
new->fl_mask = flags | notflags;
#if 0
printf("flags = %08x, mask = %08x (%08x, %08x)\n",
new->fl_flags, new->fl_mask, flags, notflags);
#endif
return new;
}
/*
* -print functions --
*
* Always true, causes the current pathame to be written to
* standard output.
*/
int
f_print(plan, entry)
PLAN *plan;
FTSENT *entry;
{
(void)puts(entry->fts_path);
return (1);
}
PLAN *
c_print()
{
isoutput = 1;
return (palloc(N_PRINT, f_print));
}
/*
* -print0 functions --
*
* Always true, causes the current pathame to be written to
* standard output followed by a NUL character
*/
int
f_print0(plan, entry)
PLAN *plan;
FTSENT *entry;
{
fputs(entry->fts_path, stdout);
fputc('\0', stdout);
return (1);
}
PLAN *
c_print0()
{
isoutput = 1;
return (palloc(N_PRINT0, f_print0));
}
/*
* -prune functions --
*
* Prune a portion of the hierarchy.
*/
int
f_prune(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern FTS *tree;
if (fts_set(tree, entry, FTS_SKIP))
err(1, "%s", entry->fts_path);
return (1);
}
PLAN *
c_prune()
{
return (palloc(N_PRUNE, f_prune));
}
/*
* -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
* a c, the size is in bytes.
*/
#define FIND_SIZE 512
static int divsize = 1;
int
f_size(plan, entry)
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(arg)
char *arg;
{
PLAN *new;
char endch;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_SIZE, f_size);
endch = 'c';
new->o_data = find_parsenum(new, "-size", arg, &endch);
if (endch == 'c')
divsize = 0;
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, entry)
PLAN *plan;
FTSENT *entry;
{
return ((entry->fts_statp->st_mode & S_IFMT) == plan->m_data);
}
PLAN *
c_type(typestring)
char *typestring;
{
PLAN *new;
mode_t mask;
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, "-type: %s: unknown type", typestring);
}
new = palloc(N_TYPE, f_type);
new->m_data = mask;
return (new);
}
/*
* -delete functions --
*
* True always. Makes it's best shot and continues on regardless.
*/
int
f_delete(plan, entry)
PLAN *plan;
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 */
!(ftsoptions & FTS_PHYSICAL) || /* physical off */
(ftsoptions & FTS_LOGICAL)) /* or finally, logical on */
errx(1, "-delete: insecure options got turned on");
/* 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)
chflags(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()
{
ftsoptions &= ~FTS_NOSTAT; /* no optimise */
ftsoptions |= FTS_PHYSICAL; /* disable -follow */
ftsoptions &= ~FTS_LOGICAL; /* disable -follow */
isoutput = 1; /* possible output */
isdepth = 1; /* -depth implied */
return (palloc(N_DELETE, f_delete));
}
/*
* -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, entry)
PLAN *plan;
FTSENT *entry;
{
return (entry->fts_statp->st_uid == plan->u_data);
}
PLAN *
c_user(username)
char *username;
{
PLAN *new;
struct passwd *p;
uid_t uid;
ftsoptions &= ~FTS_NOSTAT;
p = getpwnam(username);
if (p == NULL) {
uid = atoi(username);
if (uid == 0 && username[0] != '0')
errx(1, "-user: %s: no such user", username);
} else
uid = p->pw_uid;
new = palloc(N_USER, f_user);
new->u_data = uid;
return (new);
}
/*
* -xdev functions --
*
* Always true, causes find not to decend past directories that have a
* different device ID (st_dev, see stat() S5.6.2 [POSIX.1])
*/
PLAN *
c_xdev()
{
ftsoptions |= FTS_XDEV;
return (palloc(N_XDEV, f_always_true));
}
/*
* ( expression ) functions --
*
* True if expression is true.
*/
int
f_expr(plan, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
state = 0;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
return (state);
}
/*
* N_OPENPAREN and N_CLOSEPAREN nodes are temporary place markers. They are
* eliminated during phase 2 of find_formplan() --- the '(' node is converted
* to a N_EXPR node containing the expression and the ')' node is discarded.
*/
PLAN *
c_openparen()
{
return (palloc(N_OPENPAREN, (int (*)())-1));
}
PLAN *
c_closeparen()
{
return (palloc(N_CLOSEPAREN, (int (*)())-1));
}
/*
* ! expression functions --
*
* Negation of a primary; the unary NOT operator.
*/
int
f_not(plan, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
state = 0;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
return (!state);
}
PLAN *
c_not()
{
return (palloc(N_NOT, f_not));
}
/*
* 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, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
state = 0;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
if (state)
return (1);
for (p = plan->p_data[1];
p && (state = (p->eval)(p, entry)); p = p->next);
return (state);
}
PLAN *
c_or()
{
return (palloc(N_OR, f_or));
}
static PLAN *
palloc(t, f)
enum ntype t;
int (*f) __P((PLAN *, FTSENT *));
{
PLAN *new;
if ((new = malloc(sizeof(PLAN))) == NULL)
err(1, NULL);
new->type = t;
new->eval = f;
new->flags = 0;
new->next = NULL;
return (new);
}
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