Another update from Larry:
[oweals/busybox.git] / dpkg_deb.c
index 9f78e642c87f194f76c2ce360df481b6ff8bf1d2..d088828857b86730f1ebf9233374300f93a9a8fc 100644 (file)
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
-/*
- *     Merge this applet into dpkg when dpkg becomes more stable
- */
-
-#include <stdio.h>
 #include <stdlib.h>
-#include <fcntl.h>
-#include <unistd.h>
 #include <string.h>
-#include <stdlib.h>
-#include <signal.h>
+#include <getopt.h>
 #include "busybox.h"
 
-/* From gunzip.c */
-extern int gz_open(FILE *compressed_file, int *pid);
-extern void gz_close(int gunzip_pid);
-
-extern int tar_unzip_init(int tarFd);
-extern int readTarFile(int tarFd, int extractFlag, int listFlag, 
-       int tostdoutFlag, int verboseFlag, char** extractList, char** excludeList);
-
-static const int dpkg_deb_contents = 1;
-static const int dpkg_deb_control = 2;
-//     const int dpkg_deb_info = 4;
-static const int dpkg_deb_extract = 8;
-static const int dpkg_deb_verbose_extract = 16;
-static const int dpkg_deb_list = 32;
-
-extern int deb_extract(int optflags, const char *dir_name, const char *deb_filename)
-{
-       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;
-
-       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;
-       }
-
-       ar_headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));    
-       srcFd = open(deb_filename, O_RDONLY);
-       
-       *ar_headers = get_ar_headers(srcFd);
-       if (ar_headers->next == NULL) {
-               error_msg_and_die("Couldnt find %s in %s", ar_filename, deb_filename);
-       }
-
-       while (ar_headers->next != NULL) {
-               if (strcmp(ar_headers->name, ar_filename) == 0) {
-                       break;
-               }
-               ar_headers = ar_headers->next;
-       }
-       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);
-
-       /* 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;
-}
-
 extern int dpkg_deb_main(int argc, char **argv)
 {
-       char *target_dir = NULL;
+       char *argument = NULL;
+       char *output_buffer = NULL;
        int opt = 0;
        int optflag = 0;        
        
-       while ((opt = getopt(argc, argv, "cexXl")) != -1) {
+       while ((opt = getopt(argc, argv, "ceftXxI")) != -1) {
                switch (opt) {
                        case 'c':
-                               optflag |= dpkg_deb_contents;
+                               optflag |= extract_contents;
                                break;
                        case 'e':
-                               optflag |= dpkg_deb_control;
+                               optflag |= extract_control;
+                               break;
+                       case 'f':
+                               optflag |= extract_field;
+                               break;
+                       case 't':
+                               optflag |= extract_fsys_tarfile;
                                break;
                        case 'X':
-                               optflag |= dpkg_deb_verbose_extract;
+                               optflag |= extract_verbose_extract;
                                break;
                        case 'x':
-                               optflag |= dpkg_deb_extract;
-                               break;
-                       case 'l':
-                               optflag |= dpkg_deb_list;
+                               optflag |= extract_extract;
                                break;
-/*                     case 'I':
-                               optflag |= dpkg_deb_info;
+                       case 'I':
+                               optflag |= extract_info;
                                break;
-*/
                        default:
                                show_usage();
                }
        }
 
-       if (((optind + 1 ) > argc) || (optflag == 0))  {
+       if (optind == argc)  {
                show_usage();
        }
-       if ((optflag & dpkg_deb_control) || (optflag & dpkg_deb_extract) || (optflag & dpkg_deb_verbose_extract)) {
-               if ( (optind + 1) == argc ) {
-                       target_dir = (char *) xmalloc(7);
-                       strcpy(target_dir, "DEBIAN");
-               } else {
-                       target_dir = (char *) xmalloc(strlen(argv[optind + 1]));
-                       strcpy(target_dir, argv[optind + 1]);
-               }
+
+       switch (optflag) {
+               case (extract_control):
+               case (extract_extract):
+               case (extract_verbose_extract):
+                       /* argument is a dir name */
+                       if ( (optind + 1) == argc ) {
+                               argument = xstrdup("DEBIAN");
+                       } else {
+                               argument = xstrdup(argv[optind + 1]);
+                       }
+                       break;
+               case (extract_field):
+                       /* argument is a control field name */
+                       if ((optind + 1) != argc) {
+                               argument = xstrdup(argv[optind + 1]);                           
+                       }
+                       break;
+               case (extract_info):
+                       /* argument is a control field name */
+                       if ((optind + 1) != argc) {
+                               argument = xstrdup(argv[optind + 1]);
+                               break;
+                       } else {
+                               error_msg("-I currently requires a filename to be specifies");
+                               return(EXIT_FAILURE);
+                       }
+                       /* argument is a filename */
+               default:
        }
-       deb_extract(optflag, target_dir, argv[optind]);
-/*     else if (optflag & dpkg_deb_info) {
-               extract_flag = TRUE;
-               extract_to_stdout = TRUE;
-               strcpy(ar_filename, "control.tar.gz");
-               extract_list = argv+optind+1;
-               printf("list one is [%s]\n",extract_list[0]);
+
+       output_buffer = deb_extract(argv[optind], optflag, argument, NULL);
+
+       if (optflag & extract_field) {
+               char *field = NULL;
+               int field_length = 0;
+               int field_start = 0;
+
+               while ((field = read_package_field(&output_buffer[field_start])) != NULL) {
+                       field_length = strlen(field);
+                       field_start += (field_length + 1);
+                       if (strstr(field, argument) == field) {
+                               printf("%s\n", field + strlen(argument) + 2);
+                       }
+                       free(field);
+               }
        }
-*/
+
        return(EXIT_SUCCESS);
 }