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copy_file_chunk uses streams now.

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This commit is contained in:
Glenn L McGrath
2001-04-11 16:23:35 +00:00
parent 5b20d02ea9
commit 4949faf4b2
14 changed files with 269 additions and 274 deletions
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113
libbb/deb_extract.c
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@@ -29,94 +29,53 @@
#include <signal.h>
#include "libbb.h"
/* From gunzip.c */
extern int gz_open(FILE *compressed_file, int *pid);
extern void gz_close(int gunzip_pid);
const int dpkg_deb_contents = 1;
const int dpkg_deb_control = 2;
const int dpkg_deb_info = 4;
const int dpkg_deb_extract = 8;
const int dpkg_deb_verbose_extract = 16;
const int dpkg_deb_list = 32;
extern int tar_unzip_init(int tarFd);
extern int readTarFile(int tarFd, int extractFlag, int listFlag,
int tostdoutFlag, int verboseFlag, char** extractList, char** excludeList);
extern int deb_extract(int optflags, const char *dir_name, const char *deb_filename)
extern int deb_extract(const char *package_filename, const int function, char *target_dir)
{
const int dpkg_deb_contents = 1;
const int dpkg_deb_control = 2;
// const int dpkg_deb_info = 4;
const int dpkg_deb_extract = 8;
const int dpkg_deb_verbose_extract = 16;
const int dpkg_deb_list = 32;
char **extract_list = NULL;
ar_headers_t *ar_headers = NULL;
char ar_filename[15];
int extract_flag = FALSE;
int list_flag = FALSE;
int verbose_flag = FALSE;
int extract_to_stdout = FALSE;
int srcFd = 0;
int status;
pid_t pid;
FILE *comp_file = NULL;
FILE *deb_file, *uncompressed_file;
ar_headers_t *headers = NULL;
char *ared_file;
int gunzip_pid;
if (dpkg_deb_contents == (dpkg_deb_contents & optflags)) {
strcpy(ar_filename, "data.tar.gz");
verbose_flag = TRUE;
list_flag = TRUE;
}
if (dpkg_deb_list == (dpkg_deb_list & optflags)) {
strcpy(ar_filename, "data.tar.gz");
list_flag = TRUE;
}
if (dpkg_deb_control == (dpkg_deb_control & optflags)) {
strcpy(ar_filename, "control.tar.gz");
extract_flag = TRUE;
}
if (dpkg_deb_extract == (dpkg_deb_extract & optflags)) {
strcpy(ar_filename, "data.tar.gz");
extract_flag = TRUE;
}
if (dpkg_deb_verbose_extract == (dpkg_deb_verbose_extract & optflags)) {
strcpy(ar_filename, "data.tar.gz");
extract_flag = TRUE;
list_flag = TRUE;
if ((function == dpkg_deb_info) || (function == dpkg_deb_control)) {
ared_file = xstrdup("control.tar.gz");
} else {
ared_file = xstrdup("data.tar.gz");
}
ar_headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
srcFd = open(deb_filename, O_RDONLY);
/* open the debian package to be worked on */
deb_file = wfopen(package_filename, "r");
headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
*ar_headers = get_ar_headers(srcFd);
if (ar_headers->next == NULL) {
error_msg_and_die("Couldnt find %s in %s", ar_filename, deb_filename);
/* get a linked list of all ar entries */
if ((headers = get_ar_headers(deb_file)) == NULL) {
error_msg("Couldnt get ar headers\n");
return(EXIT_FAILURE);
}
while (ar_headers->next != NULL) {
if (strcmp(ar_headers->name, ar_filename) == 0) {
break;
}
ar_headers = ar_headers->next;
/* seek to the start of the .tar.gz file within the ar file*/
if (seek_ared_file(deb_file, headers, ared_file) == EXIT_FAILURE) {
error_msg("Couldnt seek to ar file");
}
lseek(srcFd, ar_headers->offset, SEEK_SET);
/* Uncompress the file */
comp_file = fdopen(srcFd, "r");
if ((srcFd = gz_open(comp_file, &pid)) == EXIT_FAILURE) {
error_msg_and_die("Couldnt unzip file");
}
if ( dir_name != NULL) {
if (is_directory(dir_name, TRUE, NULL)==FALSE) {
mkdir(dir_name, 0755);
}
if (chdir(dir_name)==-1) {
error_msg_and_die("Cannot change to dir %s", dir_name);
}
}
status = readTarFile(srcFd, extract_flag, list_flag,
extract_to_stdout, verbose_flag, NULL, extract_list);
/* open a stream of decompressed data */
uncompressed_file = fdopen(gz_open(deb_file, &gunzip_pid), "r");
/* get a list of all tar headers inside the .gz file */
untar(uncompressed_file, dpkg_deb_extract, target_dir);
/* we are deliberately terminating the child so we can safely ignore this */
signal(SIGTERM, SIG_IGN);
gz_close(pid);
close(srcFd);
fclose(comp_file);
return status;
gz_close(gunzip_pid);
fclose(deb_file);
fclose(uncompressed_file);
return(EXIT_SUCCESS);
}