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-rw-r--r--toys/posix/tar.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/toys/posix/tar.c b/toys/posix/tar.c
index 656bbc58..8b481cc9 100644
--- a/toys/posix/tar.c
+++ b/toys/posix/tar.c
@@ -297,6 +297,16 @@ static int add_to_tar(struct dirtree *node)
strncpy(hdr.gname, TT.group ? TT.group : gr->gr_name, sizeof(hdr.gname));
}
+ TT.sparselen = 0;
+ if (hdr.type == '0') {
+ // Before we write the header, make sure we can read the file
+ if ((fd = open(name, O_RDONLY)) < 0) {
+ perror_msg("can't open '%s'", name);
+
+ return 0;
+ }
+ }
+
itoo(hdr.chksum, sizeof(hdr.chksum)-1, cksum(&hdr));
hdr.chksum[7] = ' ';
@@ -305,12 +315,9 @@ static int add_to_tar(struct dirtree *node)
// Write header and data to archive
xwrite(TT.fd, &hdr, 512);
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);
- }
+ xsendfile_pad(fd, TT.fd, st->st_size);
+ if (st->st_size%512) writeall(TT.fd, toybuf, (512-(st->st_size%512)));
+ close(fd);
}
done:
free(name);
@@ -379,7 +386,7 @@ static void sendfile_sparse(int fd)
while (len) {
// first/last 512 bytes used, rest left zeroes
j = (len>3072) ? 3072 : len;
- if (len != writeall(fd, toybuf+512, len)) goto error;
+ if (j != writeall(fd, toybuf+512, j)) goto error;
len -= j;
}
}