diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/deb_extract.c | 9 | ||||
| -rw-r--r-- | libbb/libbb.h | 5 | ||||
| -rw-r--r-- | libbb/untar.c | 66 |
3 files changed, 46 insertions, 34 deletions
diff --git a/libbb/deb_extract.c b/libbb/deb_extract.c index d3e615305..0f5a570b6 100644 --- a/libbb/deb_extract.c +++ b/libbb/deb_extract.c @@ -30,7 +30,11 @@ #include <signal.h> #include "libbb.h" -extern int deb_extract(const char *package_filename, int function, char *target_dir) +/* + * The contents of argument depend on the value of function. + * It is either a dir name or a control file or field name(see dpkg_deb.c) + */ +extern int deb_extract(const char *package_filename, int function, char *argument) { FILE *deb_file, *uncompressed_file; @@ -41,6 +45,7 @@ extern int deb_extract(const char *package_filename, int function, char *target_ switch (function) { case (extract_info): case (extract_control): + case (extract_field): ared_file = xstrdup("control.tar.gz"); break; default: @@ -70,7 +75,7 @@ extern int deb_extract(const char *package_filename, int function, char *target_ if (function & extract_fsys_tarfile) { copy_file_chunk(uncompressed_file, stdout, -1); } else { - untar(uncompressed_file, function, target_dir); + untar(uncompressed_file, function, argument); } /* we are deliberately terminating the child so we can safely ignore this */ gz_close(gunzip_pid); diff --git a/libbb/libbb.h b/libbb/libbb.h index bc8e3c5f3..515bf2760 100644 --- a/libbb/libbb.h +++ b/libbb/libbb.h @@ -235,10 +235,11 @@ typedef enum extract_function_e { extract_extract = 8, extract_verbose_extract = 16, extract_list = 32, - extract_fsys_tarfile = 64 + extract_fsys_tarfile = 64, + extract_field = 128 } extract_function_t; extern int deb_extract(const char *package_filename, int function, char *target_dir); -extern int untar(FILE *src_tar_file, int untar_function, char *base_path); +extern int untar(FILE *src_tar_file, const int untar_function, const char *argument); extern int unzip(FILE *l_in_file, FILE *l_out_file); extern void gz_close(int gunzip_pid); diff --git a/libbb/untar.c b/libbb/untar.c index d3e424e25..b768c0be8 100644 --- a/libbb/untar.c +++ b/libbb/untar.c @@ -22,7 +22,7 @@ #include <unistd.h> #include "libbb.h" -extern int untar(FILE *src_tar_file, int untar_function, char *base_path) +extern int untar(FILE *src_tar_file, const int untar_function, const char *argument) { typedef struct raw_tar_header { char name[100]; /* 0-99 */ @@ -101,37 +101,18 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path) if (size % 512 != 0) { next_header_offset += (512 - size % 512); } - /* - * seek to start of control file, return length - * - if (dpkg_untar_function & dpkg_untar_seek_control) { - if ((raw_tar_header.typeflag == '0') || (raw_tar_header.typeflag == '\0')) { - char *tar_filename; - - tar_filename = strrchr(raw_tar_header.name, '/'); - if (tar_filename == NULL) { - tar_filename = strdup(raw_tar_header.name); - } else { - tar_filename++; - } - - if (strcmp(tar_filename, "control") == 0) { - return(size); - } - } - } -*/ if (untar_function & (extract_contents | extract_verbose_extract)) { printf("%s\n", raw_tar_header.name); } /* extract files */ - if (base_path != NULL) { - dir = xmalloc(strlen(raw_tar_header.name) + strlen(base_path) + 2); - sprintf(dir, "%s/%s", base_path, raw_tar_header.name); + if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { + dir = xmalloc(strlen(raw_tar_header.name) + strlen(argument) + 2); + sprintf(dir, "%s/%s", argument, raw_tar_header.name); create_path(dir, 0777); } + switch (raw_tar_header.typeflag ) { case '0': case '\0': @@ -145,14 +126,28 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path) uncompressed_count += size; fclose(dst_file); } - while (uncompressed_count < next_header_offset) { - if (fgetc(src_tar_file) == EOF) { - perror_msg("untar"); - break; + else if (untar_function & extract_info) { + if (strstr(raw_tar_header.name, argument) != NULL) { + copy_file_chunk(src_tar_file, stdout, (unsigned long long) size); + uncompressed_count += size; + } + } + else if (untar_function & extract_field) { + if (strstr(raw_tar_header.name, "./control") != NULL) { + char *line; + while ((line = get_line_from_file(src_tar_file)) != NULL) { + uncompressed_count += strlen(line); + if (argument == NULL) { + printf("%s",line); + } + else if (strncmp(line, argument, strlen(argument)) == 0) { + char *file_ptr; + file_ptr = strstr(line, ": "); + printf("%s", file_ptr + 2); + } + } } - uncompressed_count++; } - uncompressed_count += size; break; } case '5': @@ -193,6 +188,17 @@ extern int untar(FILE *src_tar_file, int untar_function, char *base_path) free(dir); return(EXIT_FAILURE); } + + /* + * Seek to start of next block, cant use fseek as unzip() does support it + */ + while (uncompressed_count < next_header_offset) { + if (fgetc(src_tar_file) == EOF) { + break; + } + uncompressed_count++; + } + // free(dir); } return(EXIT_SUCCESS); |