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-rw-r--r--toys/pending/tar.c85
1 files changed, 48 insertions, 37 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c
index 4f9125f6..77c03540 100644
--- a/toys/pending/tar.c
+++ b/toys/pending/tar.c
@@ -104,14 +104,6 @@ static unsigned long long otoi(char *str, unsigned len)
return val;
}
-
-struct inode_list {
- struct inode_list *next;
- char *arg;
- ino_t ino;
- dev_t dev;
-};
-
// Calculate packet checksum, with cksum field treated as 8 spaces
static unsigned cksum(void *data)
{
@@ -181,7 +173,6 @@ static void add_file(char **nam, struct stat *st)
struct tar_hdr hdr;
struct passwd *pw = pw;
struct group *gr = gr;
- struct inode_list *node = node;
int i, fd =-1;
char *c, *p, *name = *nam, *lnk, *hname;
@@ -190,7 +181,7 @@ static void add_file(char **nam, struct stat *st)
if ((p == name || p[-1] == '/') && *p != '/' && filter(TT.excl, p)) return;
if (S_ISDIR(st->st_mode) && name[strlen(name)-1] != '/') {
- lnk = xmprintf("%s/",name);
+ lnk = xmprintf("%s/", name);
free(name);
*nam = name = lnk;
}
@@ -225,26 +216,38 @@ static void add_file(char **nam, struct stat *st)
ITOO(hdr.mtime, st->st_mtime);
// 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++)
+
+ // Are there hardlinks to a non-directory entry?
+ if (st->st_nlink>1 && !S_ISDIR(st->st_mode)) {
+ // Have we seen this dev&ino before?
+ 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 (i != TT.hlc) {
+ lnk = TT.hlx[i].arg;
+ i = 1;
+ } else {
+ // first time we've seen it, store as normal file.
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++;
+ i = 0;
}
} else i = 0;
+ // !i because hardlink to a symlink is a thing.
+ if (!i && S_ISLNK(st->st_mode)) {
+ i = 2;
+ lnk = xreadlink(name);
+ }
+
// Handle file types
if (i) {
hdr.type = '0'+i;
- if (!(lnk = i ? xreadlink(name) : node->arg)) return perror_msg("readlink");
+ if (i==2 && !(lnk = xreadlink(name))) return perror_msg("readlink");
if (strlen(lnk) > sizeof(hdr.link)) write_longname(lnk, 'K');
strncpy(hdr.link, lnk, sizeof(hdr.link));
if (i) free(lnk);
@@ -262,14 +265,10 @@ static void add_file(char **nam, struct stat *st)
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)))
- sprintf(hdr.uname, "%d", st->st_uid);
- else snprintf(hdr.uname, sizeof(hdr.uname), "%s",
- TT.owner ? TT.owner : pw->pw_name);
- if (!TT.group && !(gr = bufgetgrgid(st->st_gid)))
- sprintf(hdr.gname, "%d", st->st_gid);
- else snprintf(hdr.gname, sizeof(hdr.gname), "%s",
- TT.group ? TT.group : gr->gr_name);
+ if (TT.owner || (pw = bufgetpwuid(st->st_uid)))
+ strncpy(hdr.uname, TT.owner ? TT.owner : pw->pw_name, sizeof(hdr.uname));
+ if (TT.group || (gr = bufgetgrgid(st->st_gid)))
+ strncpy(hdr.gname, TT.group ? TT.group : gr->gr_name, sizeof(hdr.gname));
}
itoo(hdr.chksum, sizeof(hdr.chksum)-1, cksum(&hdr));
@@ -430,16 +429,16 @@ static void extract_to_disk(void)
//set ownership..., --no-same-owner, --numeric-owner
int u = TT.hdr.uid, g = TT.hdr.gid;
- if (TT.owner) u = TT.ouid;
+ if (TT.owner) TT.hdr.uid = TT.ouid;
else if (!FLAG(numeric_owner)) {
struct passwd *pw = getpwnam(TT.hdr.uname);
- if (pw && (TT.owner || !FLAG(numeric_owner))) u = pw->pw_uid;
+ if (pw && (TT.owner || !FLAG(numeric_owner))) TT.hdr.uid = pw->pw_uid;
}
- if (TT.group) g = TT.ggid;
+ if (TT.group) TT.hdr.gid = TT.ggid;
else if (!FLAG(numeric_owner)) {
struct group *gr = getgrnam(TT.hdr.gname);
- if (gr) g = gr->gr_gid;
+ if (gr) TT.hdr.gid = gr->gr_gid;
}
if (lchown(name, u, g)) perror_msg("chown %d:%d '%s'", u, g, name);;
@@ -514,9 +513,8 @@ static void unpack_tar(void)
// Posix extended record "LEN NAME=VALUE\n" format
alloread(&buf, TT.hdr.size);
for (p = buf; (p-buf)<TT.hdr.size; p += len) {
- if ((i = sscanf(p, "%u path=%n", &len, &n))<1 || len<4 ||
- len>TT.hdr.size)
- {
+ i = sscanf(p, "%u path=%n", &len, &n);
+ if (i<1 || len<4 || len>TT.hdr.size) {
error_msg("bad header");
break;
}
@@ -544,8 +542,21 @@ static void unpack_tar(void)
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));
+ 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));
+
+ if (TT.owner) TT.hdr.uid = TT.ouid;
+ else if (!FLAG(numeric_owner)) {
+ 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)) {
+ struct group *gr = getgrnam(TT.hdr.gname);
+ if (gr) TT.hdr.gid = gr->gr_gid;
+ }
+
if (!TT.hdr.link_target && *tar.link)
TT.hdr.link_target = xstrndup(tar.link, sizeof(tar.link));
if (!TT.hdr.name) {
@@ -590,8 +601,7 @@ static void unpack_tar(void)
char perm[11];
mode_to_string(TT.hdr.mode, perm);
- printf("%s %s/%s ", perm, TT.owner ? TT.owner : TT.hdr.uname,
- TT.group ? TT.group : TT.hdr.gname);
+ printf("%s %s/%s ", perm, TT.hdr.uname, 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,
@@ -698,7 +708,8 @@ void tar_main(void)
}
if (CFG_TOYBOX_FREE) {
- free (TT.hlx);
+ while(TT.hlc) free(TT.hlx[--TT.hlc].arg);
+ free(TT.hlx);
close(TT.fd);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 14:07:09 +0000