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-rw-r--r--toys/pending/tar.c146
1 files changed, 86 insertions, 60 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c
index 8fb047bf..4f9125f6 100644
--- a/toys/pending/tar.c
+++ b/toys/pending/tar.c
@@ -18,7 +18,7 @@
* Extract into dir same as filename, --restrict? "Tarball is splodey"
*
-USE_TAR(NEWTOY(tar, "&(no-recursion)(numeric-owner)(no-same-permissions)(overwrite)(exclude)*(group):(owner):(to-command):o(no-same-owner)p(same-permissions)k(keep-old)c(create)|h(dereference)x(extract)|t(list)|v(verbose)j(bzip2)z(gzip)O(to-stdout)m(touch)X(exclude-from)*T(files-from)*C(directory):f(file):[!txc][!jz]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_TAR(NEWTOY(tar, "&(no-recursion)(numeric-owner)(no-same-permissions)(overwrite)(exclude)*(mtime):(group):(owner):(to-command):o(no-same-owner)p(same-permissions)k(keep-old)c(create)|h(dereference)x(extract)|t(list)|v(verbose)j(bzip2)z(gzip)O(to-stdout)m(touch)X(exclude-from)*T(files-from)*C(directory):f(file):[!txc][!jz]", TOYFLAG_USR|TOYFLAG_BIN))
config TAR
bool "tar"
@@ -43,14 +43,21 @@ config TAR
GLOBALS(
char *f, *C;
struct arg_list *T, *X;
- char *to_command, *owner, *group;
+ char *to_command, *owner, *group, *mtime;
struct arg_list *exclude;
struct double_list *incl, *excl, *seen;
struct string_list *dirs;
- void *inodes;
char *cwd;
- int fd, ouid, ggid;
+ int fd, ouid, ggid, hlc, warn;
+ time_t mtt;
+
+ // hardlinks seen so far (hlc many)
+ struct {
+ char *arg;
+ ino_t ino;
+ dev_t dev;
+ } *hlx;
// Parsed information about a tar header.
struct {
@@ -82,7 +89,7 @@ static void itoo(char *str, int len, unsigned long long val)
}
#define ITOO(x, y) itoo(x, sizeof(x), y)
-//convert octal (or base-256) to int
+// convert octal (or base-256) to int
static unsigned long long otoi(char *str, unsigned len)
{
unsigned long long val = 0;
@@ -105,25 +112,6 @@ struct inode_list {
dev_t dev;
};
-static struct inode_list *seen_inode(void **list, struct stat *st, char *name)
-{
- if (!S_ISDIR(st->st_mode) && st->st_nlink > 1) {
- struct inode_list *new;
-
- for (new = *list; new; new = new->next)
- if(new->ino == st->st_ino && new->dev == st->st_dev)
- return new;
-
- new = xzalloc(sizeof(*new));
- new->ino = st->st_ino;
- new->dev = st->st_dev;
- new->arg = xstrdup(name);
- new->next = *list;
- *list = new;
- }
- return 0;
-}
-
// Calculate packet checksum, with cksum field treated as 8 spaces
static unsigned cksum(void *data)
{
@@ -176,9 +164,10 @@ static void skippy(long long len)
if (lskip(TT.fd, len)) perror_exit("EOF");
}
-// actually void **, but automatic typecasting doesn't work with void ** :(
+// allocate and read data from TT.fd
static void alloread(void *buf, int len)
{
+ // actually void **, but automatic typecasting doesn't work with void ** :(
void **b = buf;
free(*b);
@@ -195,8 +184,8 @@ static void add_file(char **nam, struct stat *st)
struct inode_list *node = node;
int i, fd =-1;
char *c, *p, *name = *nam, *lnk, *hname;
- static int warn = 1;
+ // exclusion defaults to --no-anchored and --wildcards-match-slash
for (p = name; *p; p++)
if ((p == name || p[-1] == '/') && *p != '/' && filter(TT.excl, p)) return;
@@ -205,19 +194,27 @@ static void add_file(char **nam, struct stat *st)
free(name);
*nam = name = lnk;
}
- hname = name;
- //remove leading '/' or relative path '../' component
- if (*hname == '/') hname++;
+
+ // remove leading / and any .. entries from saved name
+ for (hname = name; *hname == '/'; hname++);
+ for (c = hname;;) {
+ if (!(c = strstr(c, ".."))) break;
+ if (c == hname || c[-1] == '/') {
+ if (!c[2]) return;
+ if (c[2]=='/') c = hname = c+3;
+ } else c+= 2;
+ }
if (!*hname) return;
- while ((c = strstr(hname, "../"))) hname = c + 3;
- if (warn && hname != name) {
+
+ if (TT.warn && hname != name) {
fprintf(stderr, "removing leading '%.*s' from member names\n",
(int)(hname-name), name);
- warn = 0;
+ TT.warn = 0;
}
if (TT.owner) st->st_uid = TT.ouid;
if (TT.group) st->st_gid = TT.ggid;
+ if (TT.mtime) st->st_mtime = TT.mtt;
memset(&hdr, 0, sizeof(hdr));
strncpy(hdr.name, hname, sizeof(hdr.name));
@@ -227,10 +224,26 @@ static void add_file(char **nam, struct stat *st)
ITOO(hdr.size, 0); //set size later
ITOO(hdr.mtime, st->st_mtime);
- // Hard link or symlink?
- i = !!S_ISLNK(st->st_mode);
- if (i || (node = seen_inode(&TT.inodes, st, hname))) {
- hdr.type = '1'+i;
+ // Hard link or symlink? i=0 neither, i=1 hardlink, i=2 symlink
+ if (S_ISLNK(st->st_mode)) i = 2;
+ else if (st->st_nlink>1 && !S_ISDIR(st->st_mode)) {
+ for (i = 0; i<TT.hlc; i++)
+ if (st->st_ino == TT.hlx[i].ino && st->st_dev == TT.hlx[i].dev)
+ break;
+ if (i != TT.hlc) i = 1;
+ else {
+ i = 0;
+ if (!(TT.hlc&255)) TT.hlx = xrealloc(TT.hlx, TT.hlc+256);
+ TT.hlx[TT.hlc].arg = xstrdup(hname);
+ TT.hlx[TT.hlc].ino = st->st_ino;
+ TT.hlx[TT.hlc].dev = st->st_dev;
+ TT.hlc++;
+ }
+ } else i = 0;
+
+ // Handle file types
+ if (i) {
+ hdr.type = '0'+i;
if (!(lnk = i ? xreadlink(name) : node->arg)) return perror_msg("readlink");
if (strlen(lnk) > sizeof(hdr.link)) write_longname(lnk, 'K');
strncpy(hdr.link, lnk, sizeof(hdr.link));
@@ -262,15 +275,13 @@ static void add_file(char **nam, struct stat *st)
itoo(hdr.chksum, sizeof(hdr.chksum)-1, cksum(&hdr));
hdr.chksum[7] = ' ';
- if (FLAG(v)) printf("%s\n",hname);
- xwrite(TT.fd, (void*)&hdr, 512);
+ if (FLAG(v)) printf("%s\n", hname);
- //write actual data to archive
+ // Write header and data to archive
+ xwrite(TT.fd, &hdr, 512);
if (hdr.type != '0') return; //nothing to write
- if ((fd = open(name, O_RDONLY)) < 0) {
- perror_msg("can't open '%s'", name);
- return;
- }
+ if ((fd = open(name, O_RDONLY)) < 0)
+ return perror_msg("can't open '%s'", name);
xsendfile_pad(fd, TT.fd, st->st_size);
if (st->st_size%512) writeall(TT.fd, toybuf, (512-(st->st_size%512)));
close(fd);
@@ -315,7 +326,7 @@ static void extract_to_command(void)
setenv("TAR_FILENAME", TT.hdr.name, 1);
setenv("TAR_UNAME", TT.hdr.uname, 1);
setenv("TAR_GNAME", TT.hdr.gname, 1);
- sprintf(buf, "%0o", (int)TT.hdr.mtime);
+ sprintf(buf, "%0llo", (long long)TT.hdr.mtime);
setenv("TAR_MTIME", buf, 1);
sprintf(buf, "%0o", TT.hdr.uid);
setenv("TAR_UID", buf, 1);
@@ -336,7 +347,6 @@ static void extract_to_command(void)
}
}
-
// Do pending directory utimes(), NULL to flush all.
static int dirflush(char *name)
{
@@ -345,8 +355,8 @@ static int dirflush(char *name)
// Barf if name not in TT.cwd
if (name) {
ss = s = xabspath(name, -1);
- if (TT.cwd && (!strstart(&ss, TT.cwd) || (*ss && *ss!='/'))) {
- error_msg("'%s' not under '%s'", ss, TT.cwd);
+ if (TT.cwd[1] && (!strstart(&ss, TT.cwd) || *ss!='/')) {
+ error_msg("'%s' not under '%s'", name, TT.cwd);
free(s);
return 1;
@@ -359,10 +369,15 @@ static int dirflush(char *name)
long long ll = *(long long *)TT.dirs->str;
struct timeval times[2] = {{ll, 0},{ll, 0}};
+ // If next file is under (or equal to) this dir, keep waiting
if (name && strstart(&ss, ss = s) && (!*ss || *ss=='/')) break;
- if (utimes(TT.dirs->str+sizeof(long long), times)) perror_msg("utimes %lld %s", *(long long *)TT.dirs->str, TT.dirs->str+sizeof(long long));
+
+ if (utimes(TT.dirs->str+sizeof(long long), times))
+ perror_msg("utimes %lld %s", ll,
+ TT.dirs->str+sizeof(long long));
free(llist_pop(&TT.dirs));
}
+ free(s);
// name was under TT.cwd
return 0;
@@ -458,6 +473,7 @@ static void unpack_tar(void)
struct double_list *walk, *delete;
struct tar_hdr tar;
int i, and = 0;
+ unsigned maj, min;
char *s;
for (;;) {
@@ -524,8 +540,9 @@ static void unpack_tar(void)
TT.hdr.uid = otoi(tar.uid, sizeof(tar.uid));
TT.hdr.gid = otoi(tar.gid, sizeof(tar.gid));
TT.hdr.mtime = otoi(tar.mtime, sizeof(tar.mtime));
- TT.hdr.device = dev_makedev(otoi(tar.major, sizeof(tar.major)),
- otoi(tar.minor, sizeof(tar.minor)));
+ maj = otoi(tar.major, sizeof(tar.major));
+ min = otoi(tar.minor, sizeof(tar.minor));
+ TT.hdr.device = dev_makedev(maj, min);
TT.hdr.uname = xstrndup(TT.owner ? TT.owner : tar.uname,sizeof(tar.uname));
TT.hdr.gname = xstrndup(TT.group ? TT.group : tar.gname,sizeof(tar.gname));
@@ -569,14 +586,16 @@ static void unpack_tar(void)
skippy(TT.hdr.size);
else if (FLAG(t)) {
if (FLAG(v)) {
- struct tm *lc = localtime(&TT.hdr.mtime);
+ struct tm *lc = localtime(TT.mtime ? &TT.mtt : &TT.hdr.mtime);
char perm[11];
mode_to_string(TT.hdr.mode, perm);
- printf("%s %s/%s %9lld %d-%02d-%02d %02d:%02d:%02d ", perm,
- TT.hdr.uname, TT.hdr.gname, (long long)TT.hdr.size,
- 1900+lc->tm_year, 1+lc->tm_mon, lc->tm_mday, lc->tm_hour,
- lc->tm_min, lc->tm_sec);
+ printf("%s %s/%s ", perm, TT.owner ? TT.owner : TT.hdr.uname,
+ TT.group ? TT.group : TT.hdr.gname);
+ if (tar.type=='3' || tar.type=='4') printf("%u,%u", maj, min);
+ else printf("%9lld", (long long)TT.hdr.size);
+ printf(" %d-%02d-%02d %02d:%02d:%02d ", 1900+lc->tm_year, 1+lc->tm_mon,
+ lc->tm_mday, lc->tm_hour, lc->tm_min, lc->tm_sec);
}
printf("%s", TT.hdr.name);
if (TT.hdr.link_target) printf(" -> %s", TT.hdr.link_target);
@@ -619,6 +638,7 @@ void tar_main(void)
if (!geteuid()) toys.optflags |= FLAG_p;
if (TT.owner) TT.ouid = xgetuid(TT.owner);
if (TT.group) TT.ggid = xgetgid(TT.group);
+ if (TT.mtime) xparsedate(TT.mtime, &TT.mtt, (void *)&s, 1);
// Collect file list. Note: trim_list appends to TT.incl when !TT.X
for (;TT.X; TT.X = TT.X->next) do_lines(xopenro(TT.X->arg), '\n', trim_list);
@@ -635,8 +655,7 @@ void tar_main(void)
// Get destination directory
if (TT.C) xchdir(TT.C);
- s = xgetcwd();
- TT.cwd = (strcmp(s, "/")) ? xabspath(s = xgetcwd(), 1) : 0;
+ TT.cwd = xabspath(s = xgetcwd(), 1);
free(s);
// Are we reading?
@@ -659,7 +678,7 @@ void tar_main(void)
}
}
- // are we writing? (Don't have to test flag here one of 3 must be set)
+ // are we writing? (Don't have to test flag here, one of 3 must be set)
} else {
struct double_list *dl = TT.incl;
@@ -670,9 +689,16 @@ void tar_main(void)
close(TT.fd);
TT.fd = pipefd[0];
}
- do dirtree_flagread(dl->data, FLAG(h)?DIRTREE_SYMFOLLOW:0, add_to_tar);
- while (TT.incl != (dl = dl->next));
+ do {
+ TT.warn = 1;
+ dirtree_flagread(dl->data, FLAG(h)?DIRTREE_SYMFOLLOW:0, add_to_tar);
+ } while (TT.incl != (dl = dl->next));
writeall(TT.fd, toybuf, 1024);
}
+
+ if (CFG_TOYBOX_FREE) {
+ free (TT.hlx);
+ close(TT.fd);
+ }
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 17:48:11 +0000