4.3BSD-Reno/src/usr.bin/find/function.c
/*-
* Copyright (c) 1990 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 are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)function.c 5.8 (Berkeley) 6/30/90";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mount.h>
#include <grp.h>
#include <pwd.h>
#include <fts.h>
#include <unistd.h>
#include <tzfile.h>
#include <stdio.h>
#include <string.h>
#include "find.h"
#define FIND_EQUAL 0
#define FIND_LESSTHAN 1
#define FIND_GREATER 2
#define COMPARE(a, b) { \
switch(plan->flags) { \
case FIND_EQUAL: \
return(a == b); \
case FIND_LESSTHAN: \
return(a < b); \
case FIND_GREATER: \
return(a > b); \
} \
return(0); \
}
#define NEW(t, f) { \
new = (PLAN *)emalloc(sizeof(PLAN)); \
new->type = t; \
new->eval = f; \
new->flags = 0; \
new->next = NULL; \
}
/*
* find_parsenum --
* Parse a string of the form [+-]# and return the value.
*/
long
find_parsenum(plan, option, str, endch)
PLAN *plan;
char *option, *str, *endch;
{
long value;
char *endchar; /* pointer to character ending conversion */
/* determine comparison from leading + or - */
switch(*str) {
case '+':
++str;
plan->flags = FIND_GREATER;
break;
case '-':
++str;
plan->flags = FIND_LESSTHAN;
break;
default:
plan->flags = FIND_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 = strtol(str, &endchar, 10);
if (!value && endchar == str ||
endchar[0] && (!endch || endchar[0] != *endch))
bad_arg(option, "illegal numeric value");
if (endch)
*endch = endchar[0];
return(value);
}
/*
* -atime n functions --
*
* True if the difference between the file access time and the
* current time is n 24 hour periods.
*
*/
f_atime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statb.st_atime +
SECSPERDAY - 1) / SECSPERDAY, plan->t_data);
}
PLAN *
c_atime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_ATIME, f_atime);
new->t_data = find_parsenum(new, "-atime", arg, (char *)NULL);
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.
*/
f_ctime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statb.st_ctime +
SECSPERDAY - 1) / SECSPERDAY, plan->t_data);
}
PLAN *
c_ctime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_CTIME, f_ctime);
new->t_data = find_parsenum(new, "-ctime", arg, (char *)NULL);
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.
*/
/* ARGSUSED */
f_always_true(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(1);
}
PLAN *
c_depth()
{
extern int depth;
PLAN *new;
depth = 1;
NEW(T_DEPTH, f_always_true);
return(new);
}
/*
* [-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.
*/
f_exec(plan, entry)
register PLAN *plan;
FTSENT *entry;
{
register int cnt;
char *find_subst();
union wait pstat;
pid_t pid, waitpid();
for (cnt = 0; plan->e_argv[cnt]; ++cnt)
if (plan->e_len[cnt])
find_subst(plan->e_orig[cnt], &plan->e_argv[cnt],
entry->fts_path, plan->e_len[cnt]);
if (plan->flags && !find_queryuser(plan->e_argv))
return(0);
switch(pid = vfork()) {
case -1:
(void)fprintf(stderr, "find: fork: %s.\n", strerror(errno));
exit(1);
/* NOTREACHED */
case 0:
execvp(plan->e_argv[0], plan->e_argv);
(void)fprintf(stderr,
"find: %s: %s.\n", plan->e_argv[0], strerror(errno));
exit(1);
/* NOTREACHED */
}
pid = waitpid(pid, &pstat, 0);
return(pid != -1 && !pstat.w_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;
ftsoptions |= FTS_NOCHDIR;
output_specified = 1;
NEW(T_EXEC, f_exec);
new->flags = isok;
for (ap = argv = *argvp;; ++ap) {
if (!*ap)
bad_arg(isok ? "-ok" : "-exec", "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(u_char));
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)1024);
new->e_len[cnt] = 1024;
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()
{
PLAN *new;
ftsoptions &= ~FTS_PHYSICAL;
ftsoptions |= FTS_LOGICAL;
NEW(T_FOLLOW, f_always_true);
return(new);
}
/*
* -fstype functions --
*
* True if the file is of a certain type.
*/
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 short val;
/* only check when we cross mount point */
if (first || curdev != entry->fts_statb.st_dev) {
curdev = entry->fts_statb.st_dev;
if (statfs(entry->fts_accpath, &sb)) {
(void)fprintf(stderr, "find: %s: %s.\n",
entry->fts_accpath, strerror(errno));
exit(1);
}
first = 0;
val = plan->flags == MOUNT_NONE ? sb.f_flags : sb.f_type;
}
return(plan->flags == MOUNT_NONE ?
val & MNT_LOCAL : val == plan->flags);
}
PLAN *
c_fstype(arg)
char *arg;
{
register PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_FSTYPE, f_fstype);
switch(*arg) {
case 'l':
if (!strcmp(arg, "local")) {
new->flags = MOUNT_NONE;
return(new);
}
break;
case 'm':
if (!strcmp(arg, "mfs")) {
new->flags = MOUNT_MFS;
return(new);
}
break;
case 'n':
if (!strcmp(arg, "nfs")) {
new->flags = MOUNT_NFS;
return(new);
}
break;
case 'p':
if (!strcmp(arg, "pc")) {
new->flags = MOUNT_PC;
return(new);
}
break;
case 'u':
if (!strcmp(arg, "ufs")) {
new->flags = MOUNT_UFS;
return(new);
}
break;
}
(void)fprintf(stderr, "find: unknown file type %s.\n", arg);
exit(1);
/* NOTREACHED */
}
/*
* -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.
*/
f_group(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(entry->fts_statb.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')
bad_arg("-group", "no such group");
} else
gid = g->gr_gid;
NEW(T_GROUP, f_group);
new->g_data = gid;
return(new);
}
/*
* -inum n functions --
*
* True if the file has inode # n.
*/
f_inum(plan, entry)
PLAN *plan;
FTSENT *entry;
{
COMPARE(entry->fts_statb.st_ino, plan->i_data);
}
PLAN *
c_inum(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_INUM, f_inum);
new->i_data = find_parsenum(new, "-inum", arg, (char *)NULL);
return(new);
}
/*
* -links n functions --
*
* True if the file has n links.
*/
f_links(plan, entry)
PLAN *plan;
FTSENT *entry;
{
COMPARE(entry->fts_statb.st_nlink, plan->l_data);
}
PLAN *
c_links(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_LINKS, f_links);
new->l_data = find_parsenum(new, "-links", arg, (char *)NULL);
return(new);
}
/*
* -ls functions --
*
* Always true - prints the current entry to stdout in "ls" format.
*/
/* ARGSUSED */
f_ls(plan, entry)
PLAN *plan;
FTSENT *entry;
{
printlong(entry->fts_path, entry->fts_accpath, &entry->fts_statb);
return(1);
}
PLAN *
c_ls()
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
output_specified = 1;
NEW(T_LS, f_ls);
return(new);
}
/*
* -name functions --
*
* True if the basename of the filename being examined
* matches pattern using Pattern Matching Notation S3.14
*/
f_name(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(fnmatch(plan->c_data, entry->fts_name, FNM_QUOTE));
}
PLAN *
c_name(pattern)
char *pattern;
{
PLAN *new;
NEW(T_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.
*/
f_newer(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(entry->fts_statb.st_mtime > plan->t_data);
}
PLAN *
c_newer(filename)
char *filename;
{
PLAN *new;
struct stat sb;
ftsoptions &= ~FTS_NOSTAT;
if (stat(filename, &sb)) {
(void)fprintf(stderr, "find: %s: %s.\n",
filename, strerror(errno));
exit(1);
}
NEW(T_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.
*/
/* ARGSUSED */
f_nogroup(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(group_from_gid(entry->fts_statb.st_gid, 1));
}
PLAN *
c_nogroup()
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_NOGROUP, f_nogroup);
return(new);
}
/*
* -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.
*/
/* ARGSUSED */
f_nouser(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(user_from_uid(entry->fts_statb.st_uid, 1));
}
PLAN *
c_nouser()
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_NOUSER, f_nouser);
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.
*/
f_perm(plan, entry)
PLAN *plan;
FTSENT *entry;
{
mode_t mode;
mode = entry->fts_statb.st_mode &
(S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO);
if (plan->flags)
return((plan->m_data | mode) == mode);
else
return(mode == plan->m_data);
/* NOTREACHED */
}
PLAN *
c_perm(perm)
char *perm;
{
PLAN *new;
mode_t *set, *setmode();
ftsoptions &= ~FTS_NOSTAT;
NEW(T_PERM, f_perm);
if (*perm == '-') {
new->flags = 1;
++perm;
}
if ((set = setmode(perm)) == NULL)
bad_arg("-perm", "illegal mode string");
new->m_data = getmode(set, 0);
return(new);
}
/*
* -print functions --
*
* Always true, causes the current pathame to be written to
* standard output.
*/
/* ARGSUSED */
f_print(plan, entry)
PLAN *plan;
FTSENT *entry;
{
(void)printf("%s\n", entry->fts_path);
return(1);
}
PLAN *
c_print()
{
PLAN *new;
output_specified = 1;
NEW(T_PRINT, f_print);
return(new);
}
/*
* -prune functions --
*
* Prune a portion of the hierarchy.
*/
/* ARGSUSED */
f_prune(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern FTS *tree;
if (ftsset(tree, entry, FTS_SKIP)) {
(void)fprintf(stderr,
"find: %s: %s.\n", entry->fts_path, strerror(errno));
exit(1);
}
return(1);
}
PLAN *
c_prune()
{
PLAN *new;
NEW(T_PRUNE, f_prune);
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;
f_size(plan, entry)
PLAN *plan;
FTSENT *entry;
{
off_t size;
size = divsize ? (entry->fts_statb.st_size + FIND_SIZE - 1) /
FIND_SIZE : entry->fts_statb.st_size;
COMPARE(size, plan->o_data);
}
PLAN *
c_size(arg)
char *arg;
{
PLAN *new;
char endch;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_SIZE, f_size);
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, or f for
* block special file, character special file, directory, FIFO, or
* regular file, respectively.
*/
f_type(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return((entry->fts_statb.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;
default:
bad_arg("-type", "unknown type");
}
NEW(T_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.
*/
f_user(plan, entry)
PLAN *plan;
FTSENT *entry;
{
return(entry->fts_statb.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')
bad_arg("-user", "no such user");
} else
uid = p->pw_uid;
NEW(T_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()
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
ftsoptions |= FTS_XDEV;
NEW(T_XDEV, f_always_true);
return(new);
}
/*
* ( expression ) functions --
*
* True if expression is true.
*/
f_expr(plan, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
return(state);
}
/*
* T_OPENPAREN and T_CLOSEPAREN nodes are temporary place markers. They are
* eliminated during phase 2 of find_formplan() --- the '(' node is converted
* to a T_EXPR node containing the expression and the ')' node is discarded.
*/
PLAN *
c_openparen()
{
PLAN *new;
NEW(T_OPENPAREN, (int (*)())-1);
return(new);
}
PLAN *
c_closeparen()
{
PLAN *new;
NEW(T_CLOSEPAREN, (int (*)())-1);
return(new);
}
/*
* -mtime n functions --
*
* True if the difference between the file modification time and the
* current time is n 24 hour periods.
*/
f_mtime(plan, entry)
PLAN *plan;
FTSENT *entry;
{
extern time_t now;
COMPARE((now - entry->fts_statb.st_mtime + SECSPERDAY - 1) /
SECSPERDAY, plan->t_data);
}
PLAN *
c_mtime(arg)
char *arg;
{
PLAN *new;
ftsoptions &= ~FTS_NOSTAT;
NEW(T_MTIME, f_mtime);
new->t_data = find_parsenum(new, "-mtime", arg, (char *)NULL);
return(new);
}
/*
* ! expression functions --
*
* Negation of a primary; the unary NOT operator.
*/
f_not(plan, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
for (p = plan->p_data[0];
p && (state = (p->eval)(p, entry)); p = p->next);
return(!state);
}
PLAN *
c_not()
{
PLAN *new;
NEW(T_NOT, f_not);
return(new);
}
/*
* expression -o expression functions --
*
* Alternation of primaries; the OR operator. The second expression is
* not evaluated if the first expression is true.
*/
f_or(plan, entry)
PLAN *plan;
FTSENT *entry;
{
register PLAN *p;
register int state;
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()
{
PLAN *new;
NEW(T_OR, f_or);
return(new);
}