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util.c
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util.c
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/*
* Utility routines used in rsync.
*
* Copyright (C) 1996-2000 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
* Copyright (C) 2003-2014 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "ifuncs.h"
#include "itypes.h"
#include "inums.h"
extern int dry_run;
extern int module_id;
extern int protect_args;
extern int modify_window;
extern int relative_paths;
extern int preserve_times;
extern int preserve_xattrs;
extern int preallocate_files;
extern char *module_dir;
extern unsigned int module_dirlen;
extern char *partial_dir;
extern filter_rule_list daemon_filter_list;
#ifdef WITH_DROP_CACHE
#include <sys/mman.h>
extern int drop_cache;
extern int verbose;
#endif
int sanitize_paths = 0;
char curr_dir[MAXPATHLEN];
unsigned int curr_dir_len;
int curr_dir_depth; /* This is only set for a sanitizing daemon. */
#ifdef WITH_DROP_CACHE
#define FADV_BUFFER_SIZE 1024*1024*16
static struct stat fadv_fd_stat[1024];
static off_t fadv_fd_pos[1024];
static unsigned char *fadv_core_ptr[1024];
static int fadv_max_fd = 0;
static int fadv_close_ring_tail = 0;
static int fadv_close_ring_head = 0;
static int fadv_close_ring_size = 0;
static int fadv_close_ring[1024];
static int fadv_close_buffer_size = 0;
static size_t fadv_pagesize;
static void fadv_fd_init_func(void)
{
static int fadv_fd_init = 0;
if (fadv_fd_init == 0){
int i;
fadv_fd_init = 1;
fadv_pagesize = getpagesize();
if (fadv_max_fd == 0){
fadv_max_fd = sysconf(_SC_OPEN_MAX) - 20;
if (fadv_max_fd < 0)
fadv_max_fd = 1;
if (fadv_max_fd > 1000)
fadv_max_fd = 1000;
}
for (i=0;i<fadv_max_fd;i++){
fadv_fd_pos[i] = 0;
fadv_fd_stat[i].st_dev = 0;
fadv_fd_stat[i].st_ino = 0;
fadv_fd_stat[i].st_size = 0;
fadv_core_ptr[i] = NULL;
}
}
}
static void fadv_get_core(int fd)
{
struct stat stat;
void *pa;
size_t pi;
fstat(fd,&stat);
if ( fadv_fd_stat[fd].st_dev == stat.st_dev && fadv_fd_stat[fd].st_ino == stat.st_ino ) {
return;
}
fadv_fd_stat[fd].st_dev = stat.st_dev;
fadv_fd_stat[fd].st_ino = stat.st_ino;
fadv_fd_stat[fd].st_size = stat.st_size;
if (fadv_core_ptr[fd]!=NULL){
free (fadv_core_ptr[fd]);
}
pa = mmap((void *)0, stat.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (MAP_FAILED == pa) {
perror("mmap");
}
else {
fadv_core_ptr[fd] = calloc(1, (stat.st_size+fadv_pagesize)/fadv_pagesize);
if ( fadv_core_ptr[fd] == NULL ){
perror("calloc");
} else {
if ( mincore(pa, stat.st_size, (fadv_core_ptr[fd])) != 0){
perror("mincore");
free(fadv_core_ptr[fd]);
fadv_core_ptr[fd]=(unsigned char*)0;
} else if (verbose > 99) {
rprintf(FINFO,"%d: ",fd);
for (pi = 0; pi <= stat.st_size/fadv_pagesize; pi++) {
if ((fadv_core_ptr[fd])[pi]&1) {
rprintf(FINFO,"%lu ", (unsigned long)pi);
}
}
rprintf(FINFO,"\n");
}
munmap(pa, stat.st_size);
}
}
}
static void fadv_drop(int fd, int sync)
{
/* trail 1 MB behind in dropping. we do this to make
sure that the same block or stripe does not have
to be written twice */
off_t pos = lseek(fd,0,SEEK_CUR) - 1024*1024;
if (fd > fadv_max_fd){
return;
}
if ( fadv_fd_pos[fd] < pos - FADV_BUFFER_SIZE ) {
if (sync) {
/* if the file is not flushed to disk before calling fadvise,
then the Cache will not be freed and the advise gets ignored
this does give a severe hit on performance. If only there
was a way to mark cache so that it gets release once the data
is written to disk. */
fdatasync(fd);
}
if (fadv_core_ptr[fd] != NULL) {
size_t pi;
if (pos < fadv_fd_stat[fd].st_size){
for (pi = fadv_fd_pos[fd]/fadv_pagesize; pi <= pos/fadv_pagesize; pi++) {
if (! (fadv_core_ptr[fd][pi]&1)) {
posix_fadvise64(fd, pi*fadv_pagesize, fadv_pagesize, POSIX_FADV_DONTNEED);
}
}
} else {
posix_fadvise64(fd, fadv_fd_stat[fd].st_size, pos-fadv_fd_stat[fd].st_size, POSIX_FADV_DONTNEED);
}
}
else {
posix_fadvise64(fd, 0, pos, POSIX_FADV_DONTNEED);
}
fadv_fd_pos[fd] = pos;
}
}
#endif
ssize_t fadv_write(int fd, const void *buf, size_t count)
{
int ret = write(fd, buf, count);
#ifdef WITH_DROP_CACHE
if (drop_cache) {
fadv_drop(fd,1);
}
#endif
return ret;
}
ssize_t fadv_read(int fd, void *buf, size_t count)
{
int ret;
#ifdef WITH_DROP_CACHE
if (drop_cache) {
fadv_fd_init_func();
fadv_get_core(fd);
}
#endif
ret = read(fd, buf, count);
#ifdef WITH_DROP_CACHE
if (drop_cache) {
fadv_drop(fd,0);
}
#endif
return ret;
}
#ifdef WITH_DROP_CACHE
void fadv_close_all(void)
{
/* printf ("%i\n",fadv_close_ring_size); */
while (fadv_close_ring_size > 0){
fdatasync(fadv_close_ring[fadv_close_ring_tail]);
if (fadv_core_ptr[fadv_close_ring[fadv_close_ring_tail]]){
size_t pi;
for (pi = 0; pi <= fadv_fd_stat[fadv_close_ring[fadv_close_ring_tail]].st_size/fadv_pagesize; pi++) {
if (!(fadv_core_ptr[fadv_close_ring[fadv_close_ring_tail]][pi]&1)) {
posix_fadvise64(fadv_close_ring[fadv_close_ring_tail], pi*fadv_pagesize, fadv_pagesize, POSIX_FADV_DONTNEED);
}
}
/* if the file has grown, drop the rest */
//posix_fadvise64(fadv_close_ring[fadv_close_ring_tail], fadv_fd_stat[fadv_close_ring[fadv_close_ring_tail]].st_size,0, POSIX_FADV_DONTNEED);
free(fadv_core_ptr[fadv_close_ring[fadv_close_ring_tail]]);
fadv_core_ptr[fadv_close_ring[fadv_close_ring_tail]] = NULL;
fadv_fd_stat[fadv_close_ring[fadv_close_ring_tail]].st_size = 0;
fadv_fd_stat[fadv_close_ring[fadv_close_ring_tail]].st_ino = 0;
fadv_fd_stat[fadv_close_ring[fadv_close_ring_tail]].st_dev = 0;
}
else {
posix_fadvise64(fadv_close_ring[fadv_close_ring_tail], 0, 0,POSIX_FADV_DONTNEED);
}
fadv_close_ring_size--;
close(fadv_close_ring[fadv_close_ring_tail]);
fadv_close_ring_tail = (fadv_close_ring_tail + 1) % fadv_max_fd;
fadv_close_buffer_size = 0;
}
}
int fadv_close(int fd)
{
if (drop_cache) {
/* if the file is not flushed to disk before calling fadvise,
then the Cache will not be freed and the advise gets ignored
this does give a severe hit on performance. So instead of doing
it right away, we save us a copy of the filehandle and do it
some time before we are out of filehandles. This speeds
up operation for small files massively. It is directly
related to the number of spare file handles you have. */
int newfd = dup(fd);
off_t pos = lseek(fd,0,SEEK_CUR);
fadv_fd_init_func();
fadv_core_ptr[newfd] = fadv_core_ptr[fd];
fadv_fd_stat[newfd].st_size = fadv_fd_stat[fd].st_size ;
fadv_core_ptr[fd] = NULL;
fadv_close_buffer_size += pos - fadv_fd_pos[fd];
fadv_close_ring[fadv_close_ring_head] = newfd;
fadv_close_ring_head = (fadv_close_ring_head + 1) % fadv_max_fd;
fadv_close_ring_size ++;
if (fadv_close_ring_size == fadv_max_fd || fadv_close_buffer_size > 1024*1024 ){
/* it seems fastest to drop things 'in groups' */
fadv_close_all();
}
};
return close(fd);
}
#define close(fd) fadv_close(fd)
#endif
/* Set a fd into nonblocking mode. */
void set_nonblocking(int fd)
{
int val;
if ((val = fcntl(fd, F_GETFL)) == -1)
return;
if (!(val & NONBLOCK_FLAG)) {
val |= NONBLOCK_FLAG;
fcntl(fd, F_SETFL, val);
}
}
/* Set a fd into blocking mode. */
void set_blocking(int fd)
{
int val;
if ((val = fcntl(fd, F_GETFL)) == -1)
return;
if (val & NONBLOCK_FLAG) {
val &= ~NONBLOCK_FLAG;
fcntl(fd, F_SETFL, val);
}
}
/**
* Create a file descriptor pair - like pipe() but use socketpair if
* possible (because of blocking issues on pipes).
*
* Always set non-blocking.
*/
int fd_pair(int fd[2])
{
int ret;
#ifdef HAVE_SOCKETPAIR
ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
#else
ret = pipe(fd);
#endif
if (ret == 0) {
set_nonblocking(fd[0]);
set_nonblocking(fd[1]);
}
return ret;
}
void print_child_argv(const char *prefix, char **cmd)
{
int cnt = 0;
rprintf(FCLIENT, "%s ", prefix);
for (; *cmd; cmd++) {
/* Look for characters that ought to be quoted. This
* is not a great quoting algorithm, but it's
* sufficient for a log message. */
if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789"
",.-_=+@/") != strlen(*cmd)) {
rprintf(FCLIENT, "\"%s\" ", *cmd);
} else {
rprintf(FCLIENT, "%s ", *cmd);
}
cnt++;
}
rprintf(FCLIENT, " (%d args)\n", cnt);
}
/* This returns 0 for success, 1 for a symlink if symlink time-setting
* is not possible, or -1 for any other error. */
int set_modtime(const char *fname, time_t modtime, uint32 mod_nsec, mode_t mode)
{
static int switch_step = 0;
if (DEBUG_GTE(TIME, 1)) {
rprintf(FINFO, "set modtime of %s to (%ld) %s",
fname, (long)modtime,
asctime(localtime(&modtime)));
}
switch (switch_step) {
#ifdef HAVE_UTIMENSAT
#include "case_N.h"
if (do_utimensat(fname, modtime, mod_nsec) == 0)
break;
if (errno != ENOSYS)
return -1;
switch_step++;
/* FALLTHROUGH */
#endif
#ifdef HAVE_LUTIMES
#include "case_N.h"
if (do_lutimes(fname, modtime, mod_nsec) == 0)
break;
if (errno != ENOSYS)
return -1;
switch_step++;
/* FALLTHROUGH */
#endif
#include "case_N.h"
switch_step++;
if (preserve_times & PRESERVE_LINK_TIMES) {
preserve_times &= ~PRESERVE_LINK_TIMES;
if (S_ISLNK(mode))
return 1;
}
/* FALLTHROUGH */
#include "case_N.h"
#ifdef HAVE_UTIMES
if (do_utimes(fname, modtime, mod_nsec) == 0)
break;
#else
if (do_utime(fname, modtime, mod_nsec) == 0)
break;
#endif
return -1;
}
return 0;
}
/* Create any necessary directories in fname. Any missing directories are
* created with default permissions. Returns < 0 on error, or the number
* of directories created. */
int make_path(char *fname, int flags)
{
char *end, *p;
int ret = 0;
if (flags & MKP_SKIP_SLASH) {
while (*fname == '/')
fname++;
}
while (*fname == '.' && fname[1] == '/')
fname += 2;
if (flags & MKP_DROP_NAME) {
end = strrchr(fname, '/');
if (!end)
return 0;
*end = '\0';
} else
end = fname + strlen(fname);
/* Try to find an existing dir, starting from the deepest dir. */
for (p = end; ; ) {
if (dry_run) {
STRUCT_STAT st;
if (do_stat(fname, &st) == 0) {
if (S_ISDIR(st.st_mode))
errno = EEXIST;
else
errno = ENOTDIR;
}
} else if (do_mkdir(fname, ACCESSPERMS) == 0) {
ret++;
break;
}
if (errno != ENOENT) {
if (errno != EEXIST)
ret = -ret - 1;
break;
}
while (1) {
if (p == fname) {
/* We got a relative path that doesn't exist, so assume that '.'
* is there and just break out and create the whole thing. */
p = NULL;
goto double_break;
}
if (*--p == '/') {
if (p == fname) {
/* We reached the "/" dir, which we assume is there. */
goto double_break;
}
*p = '\0';
break;
}
}
}
double_break:
/* Make all the dirs that we didn't find on the way here. */
while (p != end) {
if (p)
*p = '/';
else
p = fname;
p += strlen(p);
if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */
continue;
if (do_mkdir(fname, ACCESSPERMS) < 0)
ret = -ret - 1;
else
ret++;
}
if (flags & MKP_DROP_NAME)
*end = '/';
return ret;
}
/**
* Write @p len bytes at @p ptr to descriptor @p desc, retrying if
* interrupted.
*
* @retval len upon success
*
* @retval <0 write's (negative) error code
*
* Derived from GNU C's cccp.c.
*/
int full_write(int desc, const char *ptr, size_t len)
{
int total_written;
total_written = 0;
while (len > 0) {
int written = fadv_write(desc, ptr, len);
if (written < 0) {
if (errno == EINTR)
continue;
return written;
}
total_written += written;
ptr += written;
len -= written;
}
return total_written;
}
/**
* Read @p len bytes at @p ptr from descriptor @p desc, retrying if
* interrupted.
*
* @retval >0 the actual number of bytes read
*
* @retval 0 for EOF
*
* @retval <0 for an error.
*
* Derived from GNU C's cccp.c. */
static int safe_read(int desc, char *ptr, size_t len)
{
int n_chars;
if (len == 0)
return len;
do {
n_chars = fadv_read(desc, ptr, len);
} while (n_chars < 0 && errno == EINTR);
return n_chars;
}
/* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file.
* Otherwise, it just writes to and closes the provided file descriptor.
* In either case, if --xattrs are being preserved, the dest file will
* have its xattrs set from the source file.
*
* This is used in conjunction with the --temp-dir, --backup, and
* --copy-dest options. */
int copy_file(const char *source, const char *dest, int ofd, mode_t mode)
{
int ifd;
char buf[1024 * 8];
int len; /* Number of bytes read into `buf'. */
#ifdef PREALLOCATE_NEEDS_TRUNCATE
OFF_T preallocated_len = 0, offset = 0;
#endif
if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
errno = save_errno;
return -1;
}
if (ofd < 0) {
if (robust_unlink(dest) && errno != ENOENT) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
errno = save_errno;
return -1;
}
#ifdef SUPPORT_XATTRS
if (preserve_xattrs)
mode |= S_IWUSR;
#endif
mode &= INITACCESSPERMS;
if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
close(ifd);
errno = save_errno;
return -1;
}
}
#ifdef SUPPORT_PREALLOCATION
if (preallocate_files) {
STRUCT_STAT srcst;
/* Try to preallocate enough space for file's eventual length. Can
* reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
if (do_fstat(ifd, &srcst) < 0)
rsyserr(FWARNING, errno, "fstat %s", full_fname(source));
else if (srcst.st_size > 0) {
if (do_fallocate(ofd, 0, srcst.st_size) == 0) {
#ifdef PREALLOCATE_NEEDS_TRUNCATE
preallocated_len = srcst.st_size;
#endif
} else
rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(dest));
}
}
#endif
while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
if (full_write(ofd, buf, len) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
close(ifd);
close(ofd);
errno = save_errno;
return -1;
}
#ifdef PREALLOCATE_NEEDS_TRUNCATE
offset += len;
#endif
}
if (len < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
close(ifd);
close(ofd);
errno = save_errno;
return -1;
}
if (close(ifd) < 0) {
rsyserr(FWARNING, errno, "close failed on %s",
full_fname(source));
}
#ifdef PREALLOCATE_NEEDS_TRUNCATE
/* Source file might have shrunk since we fstatted it.
* Cut off any extra preallocated zeros from dest file. */
if (offset < preallocated_len && do_ftruncate(ofd, offset) < 0) {
/* If we fail to truncate, the dest file may be wrong, so we
* must trigger the "partial transfer" error. */
rsyserr(FERROR_XFER, errno, "ftruncate %s", full_fname(dest));
}
#endif
if (close(ofd) < 0) {
int save_errno = errno;
rsyserr(FERROR_XFER, errno, "close failed on %s",
full_fname(dest));
errno = save_errno;
return -1;
}
#ifdef SUPPORT_XATTRS
if (preserve_xattrs)
copy_xattrs(source, dest);
#endif
return 0;
}
/* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
#define MAX_RENAMES_DIGITS 3
#define MAX_RENAMES 1000
/**
* Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so
* rename to <path>/.rsyncNNN instead.
*
* Note that successive rsync runs will shuffle the filenames around a
* bit as long as the file is still busy; this is because this function
* does not know if the unlink call is due to a new file coming in, or
* --delete trying to remove old .rsyncNNN files, hence it renames it
* each time.
**/
int robust_unlink(const char *fname)
{
#ifndef ETXTBSY
return do_unlink(fname);
#else
static int counter = 1;
int rc, pos, start;
char path[MAXPATHLEN];
rc = do_unlink(fname);
if (rc == 0 || errno != ETXTBSY)
return rc;
if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
pos = MAXPATHLEN - 1;
while (pos > 0 && path[pos-1] != '/')
pos--;
pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos);
if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) {
errno = ETXTBSY;
return -1;
}
/* start where the last one left off to reduce chance of clashes */
start = counter;
do {
snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter);
if (++counter >= MAX_RENAMES)
counter = 1;
} while ((rc = access(path, 0)) == 0 && counter != start);
if (INFO_GTE(MISC, 1)) {
rprintf(FWARNING, "renaming %s to %s because of text busy\n",
fname, path);
}
/* maybe we should return rename()'s exit status? Nah. */
if (do_rename(fname, path) != 0) {
errno = ETXTBSY;
return -1;
}
return 0;
#endif
}
/* Returns 0 on successful rename, 1 if we successfully copied the file
* across filesystems, -2 if copy_file() failed, and -1 on other errors.
* If partialptr is not NULL and we need to do a copy, copy the file into
* the active partial-dir instead of over the destination file. */
int robust_rename(const char *from, const char *to, const char *partialptr,
int mode)
{
int tries = 4;
while (tries--) {
if (do_rename(from, to) == 0)
return 0;
switch (errno) {
#ifdef ETXTBSY
case ETXTBSY:
if (robust_unlink(to) != 0) {
errno = ETXTBSY;
return -1;
}
errno = ETXTBSY;
break;
#endif
case EXDEV:
if (partialptr) {
if (!handle_partial_dir(partialptr,PDIR_CREATE))
return -2;
to = partialptr;
}
if (copy_file(from, to, -1, mode) != 0)
return -2;
do_unlink(from);
return 1;
default:
return -1;
}
}
return -1;
}
static pid_t all_pids[10];
static int num_pids;
/** Fork and record the pid of the child. **/
pid_t do_fork(void)
{
pid_t newpid = fork();
if (newpid != 0 && newpid != -1) {
all_pids[num_pids++] = newpid;
}
return newpid;
}
/**
* Kill all children.
*
* @todo It would be kind of nice to make sure that they are actually
* all our children before we kill them, because their pids may have
* been recycled by some other process. Perhaps when we wait for a
* child, we should remove it from this array. Alternatively we could
* perhaps use process groups, but I think that would not work on
* ancient Unix versions that don't support them.
**/
void kill_all(int sig)
{
int i;
for (i = 0; i < num_pids; i++) {
/* Let's just be a little careful where we
* point that gun, hey? See kill(2) for the
* magic caused by negative values. */
pid_t p = all_pids[i];
if (p == getpid())
continue;
if (p <= 0)
continue;
kill(p, sig);
}
}
/** Lock a byte range in a open file */
int lock_range(int fd, int offset, int len)
{
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = offset;
lock.l_len = len;
lock.l_pid = 0;
return fcntl(fd,F_SETLK,&lock) == 0;
}
#define ENSURE_MEMSPACE(buf, type, sz, req) \
if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \
out_of_memory("glob_expand")
static inline void call_glob_match(const char *name, int len, int from_glob,
char *arg, int abpos, int fbpos);
static struct glob_data {
char *arg_buf, *filt_buf, **argv;
int absize, fbsize, maxargs, argc;
} glob;
static void glob_match(char *arg, int abpos, int fbpos)
{
int len;
char *slash;
while (*arg == '.' && arg[1] == '/') {
if (fbpos < 0) {
ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
fbpos = abpos;
}
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
glob.arg_buf[abpos++] = *arg++;
glob.arg_buf[abpos++] = *arg++;
glob.arg_buf[abpos] = '\0';
}
if ((slash = strchr(arg, '/')) != NULL) {
*slash = '\0';
len = slash - arg;
} else
len = strlen(arg);
if (strpbrk(arg, "*?[")) {
struct dirent *di;
DIR *d;
if (!(d = opendir(abpos ? glob.arg_buf : ".")))
return;
while ((di = readdir(d)) != NULL) {
char *dname = d_name(di);
if (dname[0] == '.' && (dname[1] == '\0'
|| (dname[1] == '.' && dname[2] == '\0')))
continue;
if (!wildmatch(arg, dname))
continue;
call_glob_match(dname, strlen(dname), 1,
slash ? arg + len + 1 : NULL,
abpos, fbpos);
}
closedir(d);
} else {
call_glob_match(arg, len, 0,
slash ? arg + len + 1 : NULL,
abpos, fbpos);
}
if (slash)
*slash = '/';
}
static inline void call_glob_match(const char *name, int len, int from_glob,
char *arg, int abpos, int fbpos)
{
char *use_buf;
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
memcpy(glob.arg_buf + abpos, name, len);
abpos += len;
glob.arg_buf[abpos] = '\0';
if (fbpos >= 0) {
ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
memcpy(glob.filt_buf + fbpos, name, len);
fbpos += len;
glob.filt_buf[fbpos] = '\0';
use_buf = glob.filt_buf;
} else
use_buf = glob.arg_buf;
if (from_glob || (arg && len)) {
STRUCT_STAT st;
int is_dir;
if (do_stat(glob.arg_buf, &st) != 0)
return;
is_dir = S_ISDIR(st.st_mode) != 0;
if (arg && !is_dir)
return;
if (daemon_filter_list.head
&& check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
return;
}
if (arg) {
glob.arg_buf[abpos++] = '/';
glob.arg_buf[abpos] = '\0';
if (fbpos >= 0) {
glob.filt_buf[fbpos++] = '/';
glob.filt_buf[fbpos] = '\0';
}
glob_match(arg, abpos, fbpos);
} else {
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf)))
out_of_memory("glob_match");
}
}
/* This routine performs wild-card expansion of the pathname in "arg". Any
* daemon-excluded files/dirs will not be matched by the wildcards. Returns 0
* if a wild-card string is the only returned item (due to matching nothing). */
int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
{
int ret, save_argc;
char *s;
if (!arg) {
if (glob.filt_buf)
free(glob.filt_buf);
free(glob.arg_buf);
memset(&glob, 0, sizeof glob);
return -1;
}
if (sanitize_paths)
s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
else {
s = strdup(arg);
if (!s)
out_of_memory("glob_expand");
clean_fname(s, CFN_KEEP_DOT_DIRS
| CFN_KEEP_TRAILING_SLASH
| CFN_COLLAPSE_DOT_DOT_DIRS);
}
ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
*glob.arg_buf = '\0';
glob.argc = save_argc = *argc_p;
glob.argv = *argv_p;
glob.maxargs = *maxargs_p;
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
glob_match(s, 0, -1);
/* The arg didn't match anything, so add the failed arg to the list. */
if (glob.argc == save_argc) {
ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
glob.argv[glob.argc++] = s;
ret = 0;
} else {
free(s);
ret = 1;
}
*maxargs_p = glob.maxargs;
*argv_p = glob.argv;
*argc_p = glob.argc;
return ret;
}
/* This routine is only used in daemon mode. */
void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
{
char *p, *s;
char *base = base1;
int base_len = strlen(base);
if (!arg || !*arg)
return;
if (strncmp(arg, base, base_len) == 0)
arg += base_len;
if (protect_args) {
glob_expand(arg, argv_p, argc_p, maxargs_p);
return;
}
if (!(arg = strdup(arg)))
out_of_memory("glob_expand_module");
if (asprintf(&base," %s/", base1) < 0)
out_of_memory("glob_expand_module");
base_len++;
for (s = arg; *s; s = p + base_len) {
if ((p = strstr(s, base)) != NULL)
*p = '\0'; /* split it at this point */