/* $NetBSD: function.c,v 1.81 2024/02/05 21:46:07 andvar Exp $ */
/*-
* 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)function.c 8.10 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: function.c,v 1.81 2024/02/05 21:46:07 andvar Exp $");
#endif
#endif /* not lint */
#include <sys/param.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 <inttypes.h>
#include <limits.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tzfile.h>
#include <unistd.h>
#include <util.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 int64_t find_parsenum(PLAN *, const char *, const char *, char *);
static void run_f_exec(PLAN *);
int f_always_true(PLAN *, FTSENT *);
int f_amin(PLAN *, FTSENT *);
int f_anewer(PLAN *, FTSENT *);
int f_asince(PLAN *, FTSENT *);
int f_atime(PLAN *, FTSENT *);
int f_cmin(PLAN *, FTSENT *);
int f_cnewer(PLAN *, FTSENT *);
int f_csince(PLAN *, FTSENT *);
int f_ctime(PLAN *, FTSENT *);
int f_delete(PLAN *, FTSENT *);
int f_empty(PLAN *, FTSENT *);
int f_exec(PLAN *, FTSENT *);
int f_execdir(PLAN *, FTSENT *);
int f_false(PLAN *, FTSENT *);
int f_flags(PLAN *, FTSENT *);
int f_fprint(PLAN *, FTSENT *);
int f_fstype(PLAN *, FTSENT *);
int f_group(PLAN *, FTSENT *);
int f_iname(PLAN *, FTSENT *);
int f_inum(PLAN *, FTSENT *);
int f_links(PLAN *, FTSENT *);
int f_ls(PLAN *, FTSENT *);
int f_mindepth(PLAN *, FTSENT *);
int f_maxdepth(PLAN *, FTSENT *);
int f_mmin(PLAN *, FTSENT *);
int f_mtime(PLAN *, FTSENT *);
int f_name(PLAN *, FTSENT *);
int f_newer(PLAN *, FTSENT *);
/*
* Unimplemented Gnu findutils options
*
int f_newerBB(PLAN *, FTSENT *);
int f_newerBa(PLAN *, FTSENT *);
int f_newerBc(PLAN *, FTSENT *);
int f_newerBm(PLAN *, FTSENT *);
int f_newerBt(PLAN *, FTSENT *);
int f_neweraB(PLAN *, FTSENT *);
int f_newerac(PLAN *, FTSENT *);
int f_neweram(PLAN *, FTSENT *);
int f_newerca(PLAN *, FTSENT *);
int f_newercm(PLAN *, FTSENT *);
int f_newercB(PLAN *, FTSENT *);
int f_newermB(PLAN *, FTSENT *);
int f_newerma(PLAN *, FTSENT *);
int f_newermc(PLAN *, FTSENT *);
*
*/
int f_nogroup(PLAN *, FTSENT *);
int f_nouser(PLAN *, FTSENT *);
int f_path(PLAN *, FTSENT *);
int f_perm(PLAN *, FTSENT *);
int f_print(PLAN *, FTSENT *);
int f_print0(PLAN *, FTSENT *);
int f_printx(PLAN *, FTSENT *);
int f_prune(PLAN *, FTSENT *);
int f_regex(PLAN *, FTSENT *);
int f_since(PLAN *, FTSENT *);
int f_size(PLAN *, FTSENT *);
int f_type(PLAN *, FTSENT *);
int f_user(PLAN *, FTSENT *);
int f_not(PLAN *, FTSENT *);
int f_or(PLAN *, FTSENT *);
static PLAN *c_regex_common(char ***, int, enum ntype, bool);
static PLAN *palloc(enum ntype, int (*)(PLAN *, FTSENT *));
extern int dotfd;
extern FTS *tree;
extern time_t now;
/*
* find_parsenum --
* Parse a string of the form [+-]# and return the value.
*/
static int64_t
find_parsenum(PLAN *plan, const char *option, const char *vp, char *endch)
{
int64_t value;
const char *str;
char *endchar; /* 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 strtol(). Note, if strtol() returns zero
* and endchar points to the beginning of the string we know we have
* a syntax error.
*/
value = strtoll(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);
}
/*
* find_parsedate --
*
* Validate the timestamp argument or report an error
*/
static time_t
find_parsedate(PLAN *plan, const char *option, const char *vp)
{
time_t timestamp;
errno = 0;
timestamp = parsedate(vp, NULL, NULL);
if (timestamp == -1 && errno != 0)
errx(1, "%s: %s: invalid timestamp value", option, vp);
return timestamp;
}
/*
* 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 1 minute periods.
*/
int
f_amin(PLAN *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_atime +
SECSPERMIN - 1) / SECSPERMIN, plan->t_data);
}
PLAN *
c_amin(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_AMIN, f_amin);
new->t_data = find_parsenum(new, opt, arg, NULL);
TIME_CORRECT(new, N_AMIN);
return (new);
}
/*
* -anewer file functions --
*
* True if the current file has been accessed more recently
* than the access time of the file named by the pathname
* file.
*/
int
f_anewer(PLAN *plan, FTSENT *entry)
{
return timespeccmp(&entry->fts_statp->st_atim, &plan->ts_data, >);
}
PLAN *
c_anewer(char ***argvp, int isok, char *opt)
{
char *filename = **argvp;
PLAN *new;
struct stat sb;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
if (stat(filename, &sb))
err(1, "%s: %s", opt, filename);
new = palloc(N_ANEWER, f_anewer);
new->ts_data = sb.st_atim;
return (new);
}
/*
* -asince "timestamp" functions --
*
* True if the file access time is greater than the timestamp value
*/
int
f_asince(PLAN *plan, FTSENT *entry)
{
COMPARE(entry->fts_statp->st_atime, plan->t_data);
}
PLAN *
c_asince(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_ASINCE, f_asince);
new->t_data = find_parsedate(new, opt, arg);
new->flags = F_GREATER;
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 *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_atime +
SECSPERDAY - 1) / SECSPERDAY, plan->t_data);
}
PLAN *
c_atime(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_ATIME, f_atime);
new->t_data = find_parsenum(new, opt, 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 24 hour periods.
*/
int
f_cmin(PLAN *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_ctime +
SECSPERMIN - 1) / SECSPERMIN, plan->t_data);
}
PLAN *
c_cmin(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_CMIN, f_cmin);
new->t_data = find_parsenum(new, opt, arg, NULL);
TIME_CORRECT(new, N_CMIN);
return (new);
}
/*
* -cnewer file functions --
*
* True if the current file has been changed more recently
* than the changed time of the file named by the pathname
* file.
*/
int
f_cnewer(PLAN *plan, FTSENT *entry)
{
return timespeccmp(&entry->fts_statp->st_ctim, &plan->ts_data, >);
}
PLAN *
c_cnewer(char ***argvp, int isok, char *opt)
{
char *filename = **argvp;
PLAN *new;
struct stat sb;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
if (stat(filename, &sb))
err(1, "%s: %s ", opt, filename);
new = palloc(N_CNEWER, f_cnewer);
new->ts_data = sb.st_ctim;
return (new);
}
/*
* -csince "timestamp" functions --
*
* True if the file status change time is greater than the timestamp value
*/
int
f_csince(PLAN *plan, FTSENT *entry)
{
COMPARE(entry->fts_statp->st_ctime, plan->t_data);
}
PLAN *
c_csince(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_CSINCE, f_csince);
new->t_data = find_parsedate(new, opt, arg);
new->flags = F_GREATER;
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 *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_ctime +
SECSPERDAY - 1) / SECSPERDAY, plan->t_data);
}
PLAN *
c_ctime(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_CTIME, f_ctime);
new->t_data = find_parsenum(new, opt, arg, NULL);
TIME_CORRECT(new, N_CTIME);
return (new);
}
/*
* -delete functions --
*
* Always true. 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 */
!(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 (entry->fts_level > 0 && 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(char ***argvp __unused, int isok, char *opt)
{
ftsoptions &= ~FTS_NOSTAT; /* no optimize */
ftsoptions |= FTS_PHYSICAL; /* disable -follow */
ftsoptions &= ~FTS_LOGICAL; /* disable -follow */
isoutput = 1; /* possible output */
isdepth = 1; /* -depth implied */
return palloc(N_DELETE, f_delete);
}
/*
* -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 *plan, FTSENT *entry)
{
return (1);
}
PLAN *
c_depth(char ***argvp, int isok, char *opt)
{
isdepth = 1;
return (palloc(N_DEPTH, f_always_true));
}
/*
* -empty functions --
*
* True if the file or directory is empty
*/
int
f_empty(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)
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(char ***argvp, int isok, char *opt)
{
ftsoptions &= ~FTS_NOSTAT;
return (palloc(N_EMPTY, f_empty));
}
/*
* [-exec | -ok] utility [arg ... ] ; functions --
* [-exec | -ok] utility [arg ... ] {} + functions --
*
* If the end of the primary expression is delimited by a
* semicolon: true if the executed utility returns a zero value
* as exit status. If "{}" occurs anywhere, it gets replaced by
* the current pathname.
*
* If the end of the primary expression is delimited by a plus
* sign: always true. Pathnames for which the primary is
* evaluated shall be aggregated into sets. The utility will be
* executed once per set, with "{}" replaced by the entire set of
* pathnames (as if xargs). "{}" must appear last.
*
* 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 *plan, FTSENT *entry)
{
size_t cnt;
int l;
pid_t pid;
int status;
if (plan->flags & F_PLUSSET) {
/*
* Confirm sufficient buffer space, then copy the path
* to the buffer.
*/
l = strlen(entry->fts_path);
if (plan->ep_p + l < plan->ep_ebp) {
plan->ep_bxp[plan->ep_narg++] =
strcpy(plan->ep_p, entry->fts_path);
plan->ep_p += l + 1;
if (plan->ep_narg == plan->ep_maxargs)
run_f_exec(plan);
} else {
/*
* Without sufficient space to copy in the next
* argument, run the command to empty out the
* buffer before re-attepting the copy.
*/
run_f_exec(plan);
if ((plan->ep_p + l < plan->ep_ebp)) {
plan->ep_bxp[plan->ep_narg++]
= strcpy(plan->ep_p, entry->fts_path);
plan->ep_p += l + 1;
} else
errx(1, "insufficient space for argument");
}
return (1);
} else {
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);
/* Don't mix output of command with find output. */
fflush(stdout);
fflush(stderr);
switch (pid = vfork()) {
case -1:
err(1, "vfork");
/* NOTREACHED */
case 0:
/* change dir back from where we started */
if (!(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);
}
pid = waitpid(pid, &status, 0);
return (pid != -1 && WIFEXITED(status)
&& !WEXITSTATUS(status));
}
}
static void
run_f_exec(PLAN *plan)
{
pid_t pid;
int rval, status;
/* Ensure arg list is null terminated. */
plan->ep_bxp[plan->ep_narg] = NULL;
/* Don't mix output of command with find output. */
fflush(stdout);
fflush(stderr);
switch (pid = vfork()) {
case -1:
err(1, "vfork");
/* NOTREACHED */
case 0:
/* change dir back from where we started */
if (!(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);
}
/* Clear out the argument list. */
plan->ep_narg = 0;
plan->ep_bxp[plan->ep_narg] = NULL;
/* As well as the argument buffer. */
plan->ep_p = plan->ep_bbp;
*plan->ep_p = '\0';
pid = waitpid(pid, &status, 0);
if (WIFEXITED(status))
rval = WEXITSTATUS(status);
else
rval = -1;
/*
* If we have a non-zero exit status, preserve it so find(1) can
* later exit with it.
*/
if (rval)
plan->ep_rval = rval;
}
/*
* 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.
*
* If -exec ... {} +, use only the first array, but make it large
* enough to hold 5000 args (cf. src/usr.bin/xargs/xargs.c for a
* discussion), and then allocate ARG_MAX - 4K of space for args.
*/
PLAN *
c_exec(char ***argvp, int isok, char *opt)
{
PLAN *new; /* node returned */
size_t cnt;
int brace, lastbrace;
char **argv, **ap, *p;
isoutput = 1;
new = palloc(N_EXEC, f_exec);
if (isok)
new->flags |= F_NEEDOK;
/*
* Terminate if we encounter an arg exactly equal to ";", or an
* arg exactly equal to "+" following an arg exactly equal to
* "{}".
*/
for (ap = argv = *argvp, brace = 0;; ++ap) {
if (!*ap)
errx(1, "%s: no terminating \";\" or \"+\"", opt);
lastbrace = brace;
brace = 0;
if (strcmp(*ap, "{}") == 0)
brace = 1;
if (strcmp(*ap, ";") == 0)
break;
if (strcmp(*ap, "+") == 0 && lastbrace) {
new->flags |= F_PLUSSET;
break;
}
}
/*
* POSIX says -ok ... {} + "need not be supported," and it does
* not make much sense anyway.
*/
if (new->flags & F_NEEDOK && new->flags & F_PLUSSET)
errx(1, "%s: terminating \"+\" not permitted.", opt);
if (new->flags & F_PLUSSET) {
size_t c, bufsize;
cnt = ap - *argvp - 1; /* units are words */
new->ep_maxargs = ARG_MAX / (sizeof (char *) + 16);
if (new->ep_maxargs > 5000)
new->ep_maxargs = 5000;
new->e_argv = emalloc((cnt + new->ep_maxargs)
* sizeof(*new->e_argv));
/* We start stuffing arguments after the user's last one. */
new->ep_bxp = &new->e_argv[cnt];
new->ep_narg = 0;
/*
* Count up the space of the user's arguments, and
* subtract that from what we allocate.
*/
#define MAXARG (ARG_MAX - 4 * 1024)
for (argv = *argvp, c = 0, cnt = 0;
argv < ap;
++argv, ++cnt) {
c += strlen(*argv) + 1;
if (c >= MAXARG)
errx(1, "Arguments too long");
new->e_argv[cnt] = *argv;
}
if (c + new->ep_maxargs * sizeof (char *) >= MAXARG)
errx(1, "Arguments too long");
bufsize = MAXARG - c - new->ep_maxargs * sizeof (char *);
/*
* Allocate, and then initialize current, base, and
* end pointers.
*/
new->ep_p = new->ep_bbp = emalloc(bufsize + 1);
new->ep_ebp = new->ep_bbp + bufsize - 1;
new->ep_rval = 0;
} else { /* !F_PLUSSET */
cnt = ap - *argvp + 1;
new->e_argv = emalloc(cnt * sizeof(*new->e_argv));
new->e_orig = emalloc(cnt * sizeof(*new->e_orig));
new->e_len = emalloc(cnt * sizeof(*new->e_len));
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(MAXPATHLEN);
new->e_len[cnt] = MAXPATHLEN;
break;
}
if (!*p) {
new->e_argv[cnt] = *argv;
new->e_len[cnt] = 0;
}
}
new->e_orig[cnt] = NULL;
}
new->e_argv[cnt] = NULL;
*argvp = argv + 1;
return (new);
}
/*
* -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 *plan, FTSENT *entry)
{
size_t 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 = vfork()) {
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(char ***argvp, int isok, char *opt)
{
PLAN *new; /* node returned */
size_t cnt;
char **argv, **ap, *p;
ftsoptions &= ~FTS_NOSTAT;
isoutput = 1;
new = palloc(N_EXECDIR, f_execdir);
for (ap = argv = *argvp;; ++ap) {
if (!*ap)
errx(1, "%s: no terminating \";\"", opt);
if (**ap == ';')
break;
}
cnt = ap - *argvp + 1;
new->e_argv = emalloc(cnt * sizeof(*new->e_argv));
new->e_orig = emalloc(cnt * sizeof(*new->e_orig));
new->e_len = emalloc(cnt * sizeof(*new->e_len));
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(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);
}
PLAN *
c_exit(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
/* not technically true, but otherwise '-print' is implied */
isoutput = 1;
new = palloc(N_EXIT, f_always_true);
if (arg) {
(*argvp)++;
new->exit_val = find_parsenum(new, opt, arg, NULL);
} else
new->exit_val = 0;
return (new);
}
/*
* -false function
*/
int
f_false(PLAN *plan, FTSENT *entry)
{
return (0);
}
PLAN *
c_false(char ***argvp, int isok, char *opt)
{
return (palloc(N_FALSE, f_false));
}
/*
* -flags [-]flags functions --
*/
int
f_flags(PLAN *plan, FTSENT *entry)
{
uint32_t flags;
flags = entry->fts_statp->st_flags;
if (plan->flags == F_ATLEAST)
return ((plan->f_data | flags) == flags);
else
return (flags == plan->f_data);
/* NOTREACHED */
}
PLAN *
c_flags(char ***argvp, int isok, char *opt)
{
char *flags = **argvp;
PLAN *new;
u_long flagset;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_FLAGS, f_flags);
if (*flags == '-') {
new->flags = F_ATLEAST;
++flags;
}
flagset = 0;
if ((strcmp(flags, "none") != 0) &&
(string_to_flags(&flags, &flagset, NULL) != 0))
errx(1, "%s: %s: illegal flags string", opt, flags);
new->f_data = flagset;
return (new);
}
/*
* -follow functions --
*
* Always true, causes symbolic links to be followed on a global
* basis.
*/
PLAN *
c_follow(char ***argvp, int isok, char *opt)
{
ftsoptions &= ~FTS_PHYSICAL;
ftsoptions |= FTS_LOGICAL;
return (palloc(N_FOLLOW, f_always_true));
}
/* -fprint functions --
*
* Causes the current pathname to be written to the defined output file.
*/
int
f_fprint(PLAN *plan, FTSENT *entry)
{
if (-1 == fprintf(plan->fprint_file, "%s\n", entry->fts_path))
warn("fprintf");
return(1);
/* no descriptors are closed; they will be closed by
operating system when this find command exits. */
}
PLAN *
c_fprint(char ***argvp, int isok, char *opt)
{
PLAN *new;
isoutput = 1; /* do not assume -print */
new = palloc(N_FPRINT, f_fprint);
if (NULL == (new->fprint_file = fopen(**argvp, "w")))
err(1, "%s: %s: cannot create file", opt, **argvp);
(*argvp)++;
return (new);
}
/*
* -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 statvfs sb;
static short val;
static char fstype[sizeof(sb.f_fstypename)];
char *p, save[2];
memset(&save, 0, sizeof save); /* XXX gcc */
/* 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 (statvfs(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 = sb.f_flag;
strlcpy(fstype, sb.f_fstypename, sizeof(fstype));
}
switch (plan->flags) {
case F_MTFLAG:
return (val & plan->mt_data);
case F_MTTYPE:
return (strncmp(fstype, plan->c_data, sizeof(fstype)) == 0);
default:
abort();
}
}
PLAN *
c_fstype(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_FSTYPE, f_fstype);
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;
}
new->flags = F_MTTYPE;
new->c_data = arg;
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(char ***argvp, int isok, char *opt)
{
char *gname = **argvp;
PLAN *new;
struct group *g;
gid_t gid;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_GROUP, f_group);
g = getgrnam(gname);
if (g == NULL) {
if (atoi(gname) == 0 && gname[0] != '0' &&
strcmp(gname, "+0") && strcmp(gname, "-0"))
errx(1, "%s: %s: no such group", opt, gname);
gid = find_parsenum(new, "-group", gname, NULL);
} else {
new->flags = F_EQUAL;
gid = g->gr_gid;
}
new->g_data = gid;
return (new);
}
/*
* -inum n functions --
*
* True if the file has inode # n.
*/
int
f_inum(PLAN *plan, FTSENT *entry)
{
COMPARE(entry->fts_statp->st_ino, plan->i_data);
}
PLAN *
c_inum(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_INUM, f_inum);
new->i_data = find_parsenum(new, opt, arg, NULL);
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(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_LINKS, f_links);
new->l_data = (nlink_t)find_parsenum(new, opt, arg, NULL);
return (new);
}
/*
* -ls functions --
*
* Always true - prints the current entry to stdout in "ls" format.
*/
int
f_ls(PLAN *plan, FTSENT *entry)
{
printlong(entry->fts_path, entry->fts_accpath, entry->fts_statp);
return (1);
}
PLAN *
c_ls(char ***argvp, int isok, char *opt)
{
ftsoptions &= ~FTS_NOSTAT;
isoutput = 1;
return (palloc(N_LS, f_ls));
}
/*
* - maxdepth n functions --
*
* True if the current search depth is less than or equal to the
* maximum depth specified
*/
int
f_maxdepth(PLAN *plan, FTSENT *entry)
{
extern FTS *tree;
if (entry->fts_level >= plan->max_data)
fts_set(tree, entry, FTS_SKIP);
return (entry->fts_level <= plan->max_data);
}
PLAN *
c_maxdepth(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
new = palloc(N_MAXDEPTH, f_maxdepth);
new->max_data = atoi(arg);
return (new);
}
/*
* - mindepth n functions --
*
* True if the current search depth is greater than or equal to the
* minimum depth specified
*/
int
f_mindepth(PLAN *plan, FTSENT *entry)
{
return (entry->fts_level >= plan->min_data);
}
PLAN *
c_mindepth(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
new = palloc(N_MINDEPTH, f_mindepth);
new->min_data = atoi(arg);
return (new);
}
/*
* -mmin n functions --
*
* True if the difference between the file modification time and the
* current time is n 24 hour periods.
*/
int
f_mmin(PLAN *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_mtime + SECSPERMIN - 1) /
SECSPERMIN, plan->t_data);
}
PLAN *
c_mmin(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_MMIN, f_mmin);
new->t_data = find_parsenum(new, opt, arg, NULL);
TIME_CORRECT(new, N_MMIN);
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 *plan, FTSENT *entry)
{
COMPARE((now - entry->fts_statp->st_mtime + SECSPERDAY - 1) /
SECSPERDAY, plan->t_data);
}
PLAN *
c_mtime(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_MTIME, f_mtime);
new->t_data = find_parsenum(new, opt, arg, NULL);
TIME_CORRECT(new, N_MTIME);
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 *plan, FTSENT *entry)
{
return (!fnmatch(plan->c_data, entry->fts_name, 0));
}
PLAN *
c_name(char ***argvp, int isok, char *opt)
{
char *pattern = **argvp;
PLAN *new;
(*argvp)++;
new = palloc(N_NAME, f_name);
new->c_data = pattern;
return (new);
}
/*
* -iname functions --
*
* Similar to -name, but does case insensitive matching
*
*/
int
f_iname(PLAN *plan, FTSENT *entry)
{
return (!fnmatch(plan->c_data, entry->fts_name, FNM_CASEFOLD));
}
PLAN *
c_iname(char ***argvp, int isok, char *opt)
{
char *pattern = **argvp;
PLAN *new;
(*argvp)++;
new = palloc(N_INAME, f_iname);
new->c_data = pattern;
return (new);
}
/*
* -newer file functions --
*
* True if the current file has been modified more recently
* than the modification time of the file named by the pathname
* file.
*/
int
f_newer(PLAN *plan, FTSENT *entry)
{
return timespeccmp(&entry->fts_statp->st_mtim, &plan->ts_data, >);
}
PLAN *
c_newer(char ***argvp, int isok, char *opt)
{
char *filename = **argvp;
PLAN *new;
struct stat sb;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
if (stat(filename, &sb))
err(1, "%s: %s", opt, filename);
new = palloc(N_NEWER, f_newer);
new->ts_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, FTSENT *entry)
{
return (group_from_gid(entry->fts_statp->st_gid, 1) ? 0 : 1);
}
PLAN *
c_nogroup(char ***argvp, int isok, char *opt)
{
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 *plan, FTSENT *entry)
{
return (user_from_uid(entry->fts_statp->st_uid, 1) ? 0 : 1);
}
PLAN *
c_nouser(char ***argvp, int isok, char *opt)
{
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 *plan, FTSENT *entry)
{
return (!fnmatch(plan->c_data, entry->fts_path, 0));
}
PLAN *
c_path(char ***argvp, int isok, char *opt)
{
char *pattern = **argvp;
PLAN *new;
(*argvp)++;
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 *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
return (mode == plan->m_data);
/* NOTREACHED */
}
PLAN *
c_perm(char ***argvp, int isok, char *opt)
{
char *perm = **argvp;
PLAN *new;
mode_t *set;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_PERM, f_perm);
if (*perm == '-') {
new->flags = F_ATLEAST;
++perm;
}
if ((set = setmode(perm)) == NULL)
err(1, "%s: Cannot set file mode `%s'", opt, 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, FTSENT *entry)
{
(void)printf("%s\n", entry->fts_path);
return (1);
}
int
f_print0(PLAN *plan, FTSENT *entry)
{
(void)fputs(entry->fts_path, stdout);
(void)fputc('\0', stdout);
return (1);
}
int
f_printx(PLAN *plan, FTSENT *entry)
{
char *cp;
for (cp = entry->fts_path; *cp; cp++) {
if (*cp == '\'' || *cp == '\"' || *cp == ' ' ||
*cp == '$' || *cp == '`' ||
*cp == '\t' || *cp == '\n' || *cp == '\\')
fputc('\\', stdout);
fputc(*cp, stdout);
}
fputc('\n', stdout);
return (1);
}
PLAN *
c_print(char ***argvp, int isok, char *opt)
{
isoutput = 1;
return (palloc(N_PRINT, f_print));
}
PLAN *
c_print0(char ***argvp, int isok, char *opt)
{
isoutput = 1;
return (palloc(N_PRINT0, f_print0));
}
PLAN *
c_printx(char ***argvp, int isok, char *opt)
{
isoutput = 1;
return (palloc(N_PRINTX, f_printx));
}
/*
* -prune functions --
*
* Prune a portion of the hierarchy.
*/
int
f_prune(PLAN *plan, FTSENT *entry)
{
if (fts_set(tree, entry, FTS_SKIP))
err(1, "%s", entry->fts_path);
return (1);
}
PLAN *
c_prune(char ***argvp, int isok, char *opt)
{
return (palloc(N_PRUNE, f_prune));
}
/*
* -regex regexp (and related) functions --
*
* True if the complete file path matches the regular expression regexp.
* For -regex, regexp is a case-sensitive (basic) regular expression.
* For -iregex, regexp is a case-insensitive (basic) regular expression.
*/
int
f_regex(PLAN *plan, FTSENT *entry)
{
return (regexec(&plan->regexp_data, entry->fts_path, 0, NULL, 0) == 0);
}
static PLAN *
c_regex_common(char ***argvp, int isok, enum ntype type, bool icase)
{
char errbuf[LINE_MAX];
regex_t reg;
char *regexp = **argvp;
char *lineregexp;
PLAN *new;
int rv;
size_t len;
(*argvp)++;
len = strlen(regexp) + 1 + 6;
lineregexp = malloc(len); /* max needed */
if (lineregexp == NULL)
err(1, NULL);
snprintf(lineregexp, len, "^%s(%s%s)$",
(regcomp_flags & REG_EXTENDED) ? "" : "\\", regexp,
(regcomp_flags & REG_EXTENDED) ? "" : "\\");
rv = regcomp(®, lineregexp, REG_NOSUB|regcomp_flags|
(icase ? REG_ICASE : 0));
free(lineregexp);
if (rv != 0) {
regerror(rv, ®, errbuf, sizeof errbuf);
errx(1, "regexp %s: %s", regexp, errbuf);
}
new = palloc(type, f_regex);
new->regexp_data = reg;
return (new);
}
PLAN *
c_regex(char ***argvp, int isok, char *opt)
{
return (c_regex_common(argvp, isok, N_REGEX, false));
}
PLAN *
c_iregex(char ***argvp, int isok, char *opt)
{
return (c_regex_common(argvp, isok, N_IREGEX, true));
}
/*
* -since "timestamp" functions --
*
* True if the file modification time is greater than the timestamp value
*/
int
f_since(PLAN *plan, FTSENT *entry)
{
COMPARE(entry->fts_statp->st_mtime, plan->t_data);
}
PLAN *
c_since(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_SINCE, f_since);
new->t_data = find_parsedate(new, opt, arg);
new->flags = F_GREATER;
return (new);
}
/*
* -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 *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(char ***argvp, int isok, char *opt)
{
char *arg = **argvp;
PLAN *new;
char endch;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_SIZE, f_size);
endch = 'c';
new->o_data = find_parsenum(new, opt, 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 *plan, FTSENT *entry)
{
return ((entry->fts_statp->st_mode & S_IFMT) == plan->m_data);
}
PLAN *
c_type(char ***argvp, int isok, char *opt)
{
char *typestring = **argvp;
PLAN *new;
mode_t mask = (mode_t)0;
(*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 S_IFWHT
case 'W':
case 'w':
mask = S_IFWHT;
#ifdef FTS_WHITEOUT
ftsoptions |= FTS_WHITEOUT;
#endif
break;
#endif /* S_IFWHT */
default:
errx(1, "%s: %s: unknown type", opt, typestring);
}
new = palloc(N_TYPE, f_type);
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(char ***argvp, int isok, char *opt)
{
char *username = **argvp;
PLAN *new;
struct passwd *p;
uid_t uid;
(*argvp)++;
ftsoptions &= ~FTS_NOSTAT;
new = palloc(N_USER, f_user);
p = getpwnam(username);
if (p == NULL) {
if (atoi(username) == 0 && username[0] != '0' &&
strcmp(username, "+0") && strcmp(username, "-0"))
errx(1, "%s: %s: no such user", opt, username);
uid = find_parsenum(new, opt, username, NULL);
} else {
new->flags = F_EQUAL;
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(char ***argvp, int isok, char *opt)
{
ftsoptions |= FTS_XDEV;
return (palloc(N_XDEV, f_always_true));
}
/*
* ( expression ) functions --
*
* True if expression is true.
*/
int
f_expr(PLAN *plan, FTSENT *entry)
{
PLAN *p;
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(char ***argvp, int isok, char *opt)
{
return (palloc(N_OPENPAREN, (int (*)(PLAN *, FTSENT *))-1));
}
PLAN *
c_closeparen(char ***argvp, int isok, char *opt)
{
return (palloc(N_CLOSEPAREN, (int (*)(PLAN *, FTSENT *))-1));
}
/*
* ! expression functions --
*
* Negation of a primary; the unary NOT operator.
*/
int
f_not(PLAN *plan, FTSENT *entry)
{
PLAN *p;
int state;
state = 0;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
return (!state);
}
PLAN *
c_not(char ***argvp, int isok, char *opt)
{
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 *plan, FTSENT *entry)
{
PLAN *p;
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(char ***argvp, int isok, char *opt)
{
return (palloc(N_OR, f_or));
}
PLAN *
c_null(char ***argvp, int isok, char *opt)
{
return (NULL);
}
/*
* plan_cleanup --
* Check and see if the specified plan has any residual state,
* and if so, clean it up as appropriate.
*
* At the moment, only N_EXEC has state. Two kinds: 1)
* lists of files to feed to subprocesses 2) State on exit
* status of past subprocesses.
*/
/* ARGSUSED1 */
int
plan_cleanup(PLAN *plan, void *arg)
{
if (plan->type==N_EXEC && plan->ep_narg)
run_f_exec(plan);
return plan->ep_rval; /* Passed save exit-status up chain */
}
static PLAN *
palloc(enum ntype t, int (*f)(PLAN *, FTSENT *))
{
PLAN *new;
if ((new = malloc(sizeof(PLAN))) == NULL)
err(1, NULL);
memset(new, 0, sizeof(PLAN));
new->type = t;
new->eval = f;
return (new);
}
