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Add stream output for CPIO

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This commit is contained in:
topjohnwu 2019-02-23 05:06:07 -05:00
parent 75939047d1
commit 2ab17204c6
2 changed files with 63 additions and 51 deletions
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94
native/jni/utils/cpio.cpp
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@ -10,6 +10,23 @@
using namespace std;
struct cpio_newc_header {
char magic[6];
char ino[8];
char mode[8];
char uid[8];
char gid[8];
char nlink[8];
char mtime[8];
char filesize[8];
char devmajor[8];
char devminor[8];
char rdevmajor[8];
char rdevminor[8];
char namesize[8];
char check[8];
} __attribute__((packed));
static uint32_t x8u(const char *hex) {
uint32_t val, inpos = 8, outpos;
char pattern[6];
@ -47,43 +64,11 @@ cpio_entry::~cpio_entry() {
free(data);
}
#define dump_align() write_zero(fd, align_off(lseek(fd, 0, SEEK_CUR), 4))
void cpio::dump(const char *file) {
fprintf(stderr, "Dump cpio: [%s]\n", file);
unsigned inode = 300000;
char header[111];
int fd = creat(file, 0644);
for (auto &e : entries) {
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, // e->ino
e.second->mode,
e.second->uid,
e.second->gid,
1, // e->nlink
0, // e->mtime
e.second->filesize,
0, // e->devmajor
0, // e->devminor
0, // e->rdevmajor
0, // e->rdevminor
(uint32_t) e.first.size() + 1,
0 // e->check
);
xwrite(fd, header, 110);
xwrite(fd, e.first.data(), e.first.size() + 1);
dump_align();
if (e.second->filesize) {
xwrite(fd, e.second->data, e.second->filesize);
dump_align();
}
}
// Write trailer
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 11, 0);
xwrite(fd, header, 110);
xwrite(fd, "TRAILER!!!\0", 11);
dump_align();
close(fd);
int fd = xopen(file, O_WRONLY | O_CREAT, 0644);
FDOutStream fd_out(fd, true);
output(fd_out);
}
void cpio::rm(entry_map::iterator &it) {
@ -143,6 +128,45 @@ bool cpio::exists(const char *name) {
return entries.count(name) != 0;
}
#define do_out(b, l) out.write(b, l); pos += (l)
#define out_align() out.write(zeros, align_off(pos, 4)); pos = do_align(pos, 4)
void cpio::output(OutStream &out) {
size_t pos = 0;
unsigned inode = 300000;
char header[111];
char zeros[4] = {0};
for (auto &e : entries) {
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, // e->ino
e.second->mode,
e.second->uid,
e.second->gid,
1, // e->nlink
0, // e->mtime
e.second->filesize,
0, // e->devmajor
0, // e->devminor
0, // e->rdevmajor
0, // e->rdevminor
(uint32_t) e.first.size() + 1,
0 // e->check
);
do_out(header, 110);
do_out(e.first.data(), e.first.size() + 1);
out_align();
if (e.second->filesize) {
do_out(e.second->data, e.second->filesize);
out_align();
}
}
// Write trailer
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 11, 0);
do_out(header, 110);
do_out("TRAILER!!!\0", 11);
out_align();
}
cpio_rw::cpio_rw(const char *filename) {
int fd = xopen(filename, O_RDONLY);
fprintf(stderr, "Loading cpio: [%s]\n", filename);

20
native/jni/utils/include/cpio.h
View File

@ -6,22 +6,9 @@
#include <map>
#include <string_view>
struct cpio_newc_header {
char magic[6];
char ino[8];
char mode[8];
char uid[8];
char gid[8];
char nlink[8];
char mtime[8];
char filesize[8];
char devmajor[8];
char devminor[8];
char rdevmajor[8];
char rdevminor[8];
char namesize[8];
char check[8];
} __attribute__((packed));
#include <OutStream.h>
struct cpio_newc_header;
struct cpio_entry_base {
uint32_t mode = 0;
@ -58,6 +45,7 @@ public:
protected:
entry_map entries;
void rm(entry_map::iterator &it);
void output(OutStream &out);
};
class cpio_rw : public cpio {