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-rw-r--r--toys/pending/tar.c114
1 files changed, 65 insertions, 49 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c
index 77c03540..7d688241 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)*(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))
+USE_TAR(NEWTOY(tar, "&(full-time)(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"
@@ -49,7 +49,7 @@ GLOBALS(
struct double_list *incl, *excl, *seen;
struct string_list *dirs;
char *cwd;
- int fd, ouid, ggid, hlc, warn;
+ int fd, ouid, ggid, hlc, warn, adev, aino;
time_t mtt;
// hardlinks seen so far (hlc many)
@@ -60,7 +60,7 @@ GLOBALS(
} *hlx;
// Parsed information about a tar header.
- struct {
+ struct tar_header {
char *name, *link_target, *uname, *gname;
long long size;
uid_t uid;
@@ -129,8 +129,8 @@ static void write_longname(char *name, char type)
tmp.type = type;
strcpy(tmp.magic, "ustar ");
- // Calculate checksum. Since 0777777 is twice 512*255 it can never use more
- // than 6 digits, last byte is ' ' or historical reasons.
+ // Calculate checksum. Since 512*255 = 0377000 in octal, this can never
+ // use more than 6 digits. The last byte is ' ' or historical reasons.
itoo(tmp.chksum, sizeof(tmp.chksum)-1, cksum(&tmp));
tmp.chksum[7] = ' ';
@@ -168,34 +168,42 @@ static void alloread(void *buf, int len)
b[len] = 0;
}
-static void add_file(char **nam, struct stat *st)
+static int add_to_tar(struct dirtree *node)
{
+ struct stat *st = &(node->st);
struct tar_hdr hdr;
struct passwd *pw = pw;
struct group *gr = gr;
int i, fd =-1;
- char *c, *p, *name = *nam, *lnk, *hname;
+ char *c, *p, *name, *lnk, *hname;
+
+ if (!dirtree_notdotdot(node)) return 0;
+ if (TT.adev == st->st_dev && TT.aino == st->st_ino) {
+ error_msg("'%s' file is the archive; not dumped", node->name);
+ return 0;
+ }
+
+ i = 1;
+ name = dirtree_path(node, &i);
// 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;
+ if ((p == name || p[-1] == '/') && *p != '/' && filter(TT.excl, p))
+ goto done;
- if (S_ISDIR(st->st_mode) && name[strlen(name)-1] != '/') {
- lnk = xmprintf("%s/", name);
- free(name);
- *nam = name = lnk;
- }
+ // The 1 extra byte from dirtree_path()
+ if (S_ISDIR(st->st_mode) && name[i-1] != '/') strcat(name, "/");
// 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]) goto done;
if (c[2]=='/') c = hname = c+3;
} else c+= 2;
}
- if (!*hname) return;
+ if (!*hname) goto done;
if (TT.warn && hname != name) {
fprintf(stderr, "removing leading '%.*s' from member names\n",
@@ -214,6 +222,7 @@ static void add_file(char **nam, struct stat *st)
ITOO(hdr.gid, st->st_gid);
ITOO(hdr.size, 0); //set size later
ITOO(hdr.mtime, st->st_mtime);
+ strcpy(hdr.magic, "ustar ");
// Hard link or symlink? i=0 neither, i=1 hardlink, i=2 symlink
@@ -228,7 +237,7 @@ static void add_file(char **nam, struct stat *st)
lnk = TT.hlx[i].arg;
i = 1;
} else {
- // first time we've seen it, store as normal file.
+ // first time we've seen it. Store as normal file, but remember it.
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;
@@ -247,7 +256,10 @@ static void add_file(char **nam, struct stat *st)
// Handle file types
if (i) {
hdr.type = '0'+i;
- if (i==2 && !(lnk = xreadlink(name))) return perror_msg("readlink");
+ if (i==2 && !(lnk = xreadlink(name))) {
+ perror_msg("readlink");
+ goto done;
+ }
if (strlen(lnk) > sizeof(hdr.link)) write_longname(lnk, 'K');
strncpy(hdr.link, lnk, sizeof(hdr.link));
if (i) free(lnk);
@@ -260,10 +272,12 @@ static void add_file(char **nam, struct stat *st)
hdr.type = (S_ISCHR(st->st_mode))?'3':'4';
ITOO(hdr.major, dev_major(st->st_rdev));
ITOO(hdr.minor, dev_minor(st->st_rdev));
- } else return error_msg("unknown file type '%o'", st->st_mode & S_IFMT);
+ } else {
+ error_msg("unknown file type '%o'", st->st_mode & S_IFMT);
+ goto done;
+ }
if (strlen(hname) > sizeof(hdr.name)) write_longname(hname, 'L');
- strcpy(hdr.magic, "ustar ");
if (!FLAG(numeric_owner)) {
if (TT.owner || (pw = bufgetpwuid(st->st_uid)))
strncpy(hdr.uname, TT.owner ? TT.owner : pw->pw_name, sizeof(hdr.uname));
@@ -278,29 +292,16 @@ static void add_file(char **nam, struct stat *st)
// 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)
- 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);
-}
-
-static int add_to_tar(struct dirtree *node)
-{
- struct stat st;
- char *path;
-
- if (!dirtree_notdotdot(node)) return 0;
- if (!fstat(TT.fd, &st) && st.st_dev == node->st.st_dev
- && st.st_ino == node->st.st_ino) {
- error_msg("'%s' file is the archive; not dumped", TT.f);
- return 0;
+ if (hdr.type == '0') {
+ if ((fd = open(name, O_RDONLY)) < 0) perror_msg("can't open '%s'", name);
+ else {
+ xsendfile_pad(fd, TT.fd, st->st_size);
+ if (st->st_size%512) writeall(TT.fd, toybuf, (512-(st->st_size%512)));
+ close(fd);
+ }
}
-
- path = dirtree_path(node, 0);
- add_file(&path, &(node->st)); //path may be modified
- free(path);
+done:
+ free(name);
return (DIRTREE_RECURSE|(FLAG(h)?DIRTREE_SYMFOLLOW:0))*!FLAG(no_recursion);
}
@@ -425,18 +426,18 @@ static void extract_to_disk(void)
return perror_msg("can't create '%s'", name);
+ // Set ownership
if (!FLAG(o) && !geteuid()) {
- //set ownership..., --no-same-owner, --numeric-owner
int u = TT.hdr.uid, g = TT.hdr.gid;
if (TT.owner) TT.hdr.uid = TT.ouid;
- else if (!FLAG(numeric_owner)) {
+ else if (!FLAG(numeric_owner) && *TT.hdr.uname) {
struct passwd *pw = getpwnam(TT.hdr.uname);
if (pw && (TT.owner || !FLAG(numeric_owner))) TT.hdr.uid = pw->pw_uid;
}
if (TT.group) TT.hdr.gid = TT.ggid;
- else if (!FLAG(numeric_owner)) {
+ else if (!FLAG(numeric_owner) && *TT.hdr.uname) {
struct group *gr = getgrnam(TT.hdr.gname);
if (gr) TT.hdr.gid = gr->gr_gid;
}
@@ -598,16 +599,21 @@ static void unpack_tar(void)
else if (FLAG(t)) {
if (FLAG(v)) {
struct tm *lc = localtime(TT.mtime ? &TT.mtt : &TT.hdr.mtime);
- char perm[11];
+ char perm[12], gname[12];
mode_to_string(TT.hdr.mode, perm);
- printf("%s %s/%s ", perm, TT.hdr.uname, TT.hdr.gname);
+ printf("%s", perm);
+ sprintf(perm, "%u", TT.hdr.uid);
+ sprintf(gname, "%u", TT.hdr.gid);
+ printf(" %s/%s ", *TT.hdr.uname ? TT.hdr.uname : perm,
+ *TT.hdr.gname ? TT.hdr.gname : 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);
+ sprintf(perm, ":%02d", lc->tm_sec);
+ printf(" %d-%02d-%02d %02d:%02d%s ", 1900+lc->tm_year, 1+lc->tm_mon,
+ lc->tm_mday, lc->tm_hour, lc->tm_min, FLAG(full_time) ? perm : "");
}
- printf("%s", TT.hdr.name);
+ printf(" %s", TT.hdr.name);
if (TT.hdr.link_target) printf(" -> %s", TT.hdr.link_target);
xputc('\n');
skippy(TT.hdr.size);
@@ -663,6 +669,16 @@ void tar_main(void)
if (TT.f && strcmp(TT.f, "-"))
TT.fd = xcreate(TT.f, TT.fd*(O_WRONLY|O_CREAT|O_TRUNC), 0666);
+ // grab archive inode
+ {
+ struct stat st;
+
+ if (!fstat(TT.fd, &st)) {
+ TT.aino = st.st_ino;
+ TT.adev = st.st_dev;
+ }
+ }
+
// Get destination directory
if (TT.C) xchdir(TT.C);
TT.cwd = xabspath(s = xgetcwd(), 1);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 14:22:47 +0000