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#include <config.h>
#include <compat.h>
#include <dpkg-i18n.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#ifdef WITH_ZLIB
#include <zlib.h>
#endif
#ifdef WITH_BZ2
#include <bzlib.h>
#endif
#include <dpkg.h>
#include "dpkg-db.h"
static void
fd_fd_filter(int fd_in, int fd_out,
const char *file, const char *cmd, const char *args,
const char *desc)
{
if (fd_in != 0) {
m_dup2(fd_in, 0);
close(fd_in);
}
if (fd_out != 1) {
m_dup2(fd_out, 1);
close(fd_out);
}
execlp(file, cmd, args, NULL);
ohshite(_("%s: failed to exec '%s %s'"), desc, cmd, args);
}
void decompress_cat(enum compress_type type, int fd_in, int fd_out, char *desc, ...) {
va_list al;
struct varbuf v = VARBUF_INIT;
va_start(al,desc);
varbufvprintf(&v, desc, al);
va_end(al);
switch(type) {
case compress_type_gzip:
#ifdef WITH_ZLIB
{
char buffer[4096];
int actualread;
gzFile gzfile = gzdopen(fd_in, "r");
while ((actualread= gzread(gzfile,buffer,sizeof(buffer))) > 0) {
if (actualread < 0 ) {
int err = 0;
const char *errmsg = gzerror(gzfile, &err);
if (err == Z_ERRNO) {
if (errno == EINTR) continue;
errmsg= strerror(errno);
}
ohshite(_("%s: internal gzip error: `%s'"), v.buf, errmsg);
}
write(fd_out,buffer,actualread);
}
}
exit(0);
#else
fd_fd_filter(fd_in, fd_out, GZIP, "gzip", "-dc", v.buf);
#endif
case compress_type_bzip2:
#ifdef WITH_BZ2
{
char buffer[4096];
int actualread;
BZFILE *bzfile = BZ2_bzdopen(fd_in, "r");
while ((actualread= BZ2_bzread(bzfile,buffer,sizeof(buffer))) > 0) {
if (actualread < 0 ) {
int err = 0;
const char *errmsg = BZ2_bzerror(bzfile, &err);
if (err == BZ_IO_ERROR) {
if (errno == EINTR) continue;
errmsg= strerror(errno);
}
ohshite(_("%s: internal bzip2 error: `%s'"), v.buf, errmsg);
}
write(fd_out,buffer,actualread);
}
}
exit(0);
#else
fd_fd_filter(fd_in, fd_out, BZIP2, "bzip2", "-dc", v.buf);
#endif
case compress_type_lzma:
fd_fd_filter(fd_in, fd_out, LZMA, "lzma", "-dc", v.buf);
case compress_type_cat:
fd_fd_copy(fd_in, fd_out, -1, _("%s: decompression"), v.buf);
exit(0);
default:
exit(1);
}
}
void compress_cat(enum compress_type type, int fd_in, int fd_out, const char *compression, char *desc, ...) {
va_list al;
struct varbuf v = VARBUF_INIT;
char combuf[6];
va_start(al,desc);
varbufvprintf(&v, desc, al);
va_end(al);
if(compression == NULL) compression= "9";
else if (*compression == '0')
type = compress_type_cat;
switch(type) {
case compress_type_gzip:
#ifdef WITH_ZLIB
{
int actualread, actualwrite;
char buffer[4096];
gzFile gzfile;
strncpy(combuf, "w9", sizeof(combuf));
combuf[1]= *compression;
gzfile = gzdopen(1, combuf);
while((actualread = read(0,buffer,sizeof(buffer))) > 0) {
if (actualread < 0 ) {
if (errno == EINTR) continue;
ohshite(_("%s: internal gzip error: read: `%s'"), v.buf, strerror(errno));
}
actualwrite= gzwrite(gzfile,buffer,actualread);
if (actualwrite < 0 ) {
int err = 0;
const char *errmsg = gzerror(gzfile, &err);
if (err == Z_ERRNO) {
if (errno == EINTR) continue;
errmsg= strerror(errno);
}
ohshite(_("%s: internal gzip error: write: `%s'"), v.buf, errmsg);
}
if (actualwrite != actualread)
ohshite(_("%s: internal gzip error: read(%i) != write(%i)"), v.buf, actualread, actualwrite);
}
gzclose(gzfile);
exit(0);
}
#else
strncpy(combuf, "-9c", sizeof(combuf));
combuf[1]= *compression;
fd_fd_filter(fd_in, fd_out, GZIP, "gzip", combuf, v.buf);
#endif
case compress_type_bzip2:
#ifdef WITH_BZ2
{
int actualread, actualwrite;
char buffer[4096];
BZFILE *bzfile;
strncpy(combuf, "w9", sizeof(combuf));
combuf[1]= *compression;
bzfile = BZ2_bzdopen(1, combuf);
while((actualread = read(0,buffer,sizeof(buffer))) > 0) {
if (actualread < 0 ) {
if (errno == EINTR) continue;
ohshite(_("%s: internal bzip2 error: read: `%s'"), v.buf, strerror(errno));
}
actualwrite= BZ2_bzwrite(bzfile,buffer,actualread);
if (actualwrite < 0 ) {
int err = 0;
const char *errmsg = BZ2_bzerror(bzfile, &err);
if (err == BZ_IO_ERROR) {
if (errno == EINTR) continue;
errmsg= strerror(errno);
}
ohshite(_("%s: internal bzip2 error: write: `%s'"), v.buf, errmsg);
}
if (actualwrite != actualread)
ohshite(_("%s: internal bzip2 error: read(%i) != write(%i)"), v.buf, actualread, actualwrite);
}
BZ2_bzclose(bzfile);
exit(0);
}
#else
strncpy(combuf, "-9c", sizeof(combuf));
combuf[1]= *compression;
fd_fd_filter(fd_in, fd_out, BZIP2, "bzip2", combuf, v.buf);
#endif
case compress_type_lzma:
strncpy(combuf, "-9c", sizeof(combuf));
combuf[1] = *compression;
fd_fd_filter(fd_in, fd_out, LZMA, "lzma", combuf, v.buf);
case compress_type_cat:
fd_fd_copy(fd_in, fd_out, -1, _("%s: compression"), v.buf);
exit(0);
default:
exit(1);
}
}
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