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-rw-r--r--toys/pending/tar.c91
1 files changed, 22 insertions, 69 deletions
diff --git a/toys/pending/tar.c b/toys/pending/tar.c
index cd4ec724..e4ea0cec 100644
--- a/toys/pending/tar.c
+++ b/toys/pending/tar.c
@@ -89,28 +89,10 @@ struct inode_list {
dev_t dev;
};
-static void copy_in_out(int src, int dst, off_t size)
-{
- int i, rd, rem = size%512, cnt;
-
- cnt = size/512 + (rem?1:0);
-
- for (i = 0; i < cnt; i++) {
- rd = (i == cnt-1 && rem) ? rem : 512;
- xreadall(src, toybuf, rd);
- writeall(dst, toybuf, rd);
- }
-}
-
//convert to octal
static void itoo(char *str, int len, off_t val)
{
- char *t, tmp[sizeof(off_t)*3+1];
- int cnt = sprintf(tmp, "%0*llo", len, (unsigned long long)val);
-
- t = tmp + cnt - len;
- if (*t == '0') t++;
- memcpy(str, t, len);
+ sprintf(str, "%0*llo", len-1, (unsigned long long)val);
}
// This really needs a hash table
@@ -175,7 +157,7 @@ static void add_file(struct archive_handler *tar, char **nam, struct stat *st)
struct tar_hdr hdr;
struct passwd *pw;
struct group *gr;
- struct inode_list *node;
+ struct inode_list *node = node;
int i, fd =-1;
char *c, *p, *name = *nam, *lnk, *hname, buf[512] = {0,};
unsigned int sum = 0;
@@ -214,7 +196,7 @@ static void add_file(struct archive_handler *tar, char **nam, struct stat *st)
if (i || (node = seen_inode(&TT.inodes, st, hname))) {
// TODO: test preserve symlink ownership
hdr.type = '1'+i;
- if (!(lnk = i?xreadlink(name):node->arg)) return perror_msg("readlink");
+ if (!(lnk = i ? xreadlink(name) : node->arg)) return perror_msg("readlink");
// TODO: does this need NUL terminator?
if (strlen(lnk) > sizeof(hdr.link))
write_longname(tar, lnk, 'K'); //write longname LINK
@@ -241,13 +223,13 @@ static void add_file(struct archive_handler *tar, char **nam, struct stat *st)
if (strlen(hname) > sizeof(hdr.name))
write_longname(tar, hname, 'L'); //write longname NAME
strcpy(hdr.magic, "ustar ");
- if ((pw = getpwuid(st->st_uid)))
+ if ((pw = bufgetpwuid(st->st_uid)))
snprintf(hdr.uname, sizeof(hdr.uname), "%s", pw->pw_name);
- else snprintf(hdr.uname, sizeof(hdr.uname), "%d", st->st_uid);
+ else sprintf(hdr.uname, "%d", st->st_uid);
- if ((gr = getgrgid(st->st_gid)))
+ if ((gr = bufgetgrgid(st->st_gid)))
snprintf(hdr.gname, sizeof(hdr.gname), "%s", gr->gr_name);
- else snprintf(hdr.gname, sizeof(hdr.gname), "%d", st->st_gid);
+ else sprintf(hdr.gname, "%d", st->st_gid);
//calculate chksum.
for (i = 0; i < 512; i++) sum += ((char*)&hdr)[i];
@@ -261,7 +243,7 @@ static void add_file(struct archive_handler *tar, char **nam, struct stat *st)
perror_msg("can't open '%s'", name);
return;
}
- copy_in_out(fd, TT.fd, st->st_size);
+ xsendfile_pad(fd, TT.fd, st->st_size);
if (st->st_size%512) writeall(TT.fd, buf, (512-(st->st_size%512)));
close(fd);
}
@@ -288,33 +270,27 @@ static int add_to_tar(struct dirtree *node)
static void compress_stream(struct archive_handler *tar_hdl)
{
- int pipefd[2];
- pid_t cpid;
+ int pipefd[2] = {-1, TT.fd};
- xpipe(pipefd);
+ xpopen_both((char *[]){FLAG(z)?"gzip":"bzip2", "-f", NULL}, pipefd);
+ close(TT.fd);
+ TT.fd = pipefd[0];
+}
- signal(SIGPIPE, SIG_IGN);
- cpid = fork();
- if (cpid == -1) perror_exit("fork");
+static void extract_stream(struct archive_handler *tar_hdl)
+{
+ int pipefd[2] = {TT.fd, -1};
- if (!cpid) { /* Child reads from pipe */
- char *argv[] = {FLAG(z)?"gzip":"bzip2", "-f", NULL};
- xclose(pipefd[1]); /* Close unused write*/
- dup2(pipefd[0], 0);
- dup2(TT.fd, 1); //write to tar fd
- xexec(argv);
- } else {
- xclose(pipefd[0]); /* Close unused read end */
-// TODO doesn't this leak pipefd[1]?
- dup2(pipefd[1], TT.fd); //write to pipe
- }
+ xpopen_both((char *[]){FLAG(z)?"gunzip":"bunzip2", "-cf", "-", NULL}, pipefd);
+ close(TT.fd);
+ TT.fd = pipefd[1];
}
static void extract_to_stdout(struct archive_handler *tar)
{
struct file_header *file_hdr = &tar->file_hdr;
- copy_in_out(TT.fd, 0, file_hdr->size);
+ xsendfile_len(TT.fd, 0, file_hdr->size);
TT.offset += file_hdr->size;
}
@@ -354,7 +330,7 @@ static void extract_to_command(struct archive_handler *tar)
xexec(argv);
} else {
xclose(pipefd[0]); // Close unused read end
- copy_in_out(TT.fd, pipefd[1], file_hdr->size);
+ xsendfile_len(TT.fd, pipefd[1], file_hdr->size);
TT.offset += file_hdr->size;
xclose(pipefd[1]);
waitpid(cpid, &status, 0);
@@ -426,7 +402,7 @@ static void extract_to_disk(struct archive_handler *tar)
//copy file....
COPY:
- copy_in_out(TT.fd, dst_fd, file_hdr->size);
+ xsendfile_len(TT.fd, dst_fd, file_hdr->size);
TT.offset += file_hdr->size;
close(dst_fd);
@@ -490,29 +466,6 @@ static int otoi(char *str, int len)
return (int)val;
}
-static void extract_stream(struct archive_handler *tar_hdl)
-{
- int pipefd[2];
- pid_t cpid;
-
- xpipe(pipefd);
-
- cpid = fork();
- if (cpid == -1) perror_exit("fork");
-
- if (!cpid) { /* Child reads from pipe */
- char *argv[] =
- {FLAG(z)?"gunzip":"bunzip2", "-cf", "-", NULL};
- xclose(pipefd[0]); /* Close unused read*/
- dup2(TT.fd, 0);
- dup2(pipefd[1], 1); //write to pipe
- xexec(argv);
- } else {
- xclose(pipefd[1]); /* Close unused read end */
- dup2(pipefd[0], TT.fd); //read from pipe
- }
-}
-
static char *process_extended_hdr(struct archive_handler *tar, int size)
{
char *value = NULL, *p, *buf = xzalloc(size+1);