From: Glenn L McGrath Date: Sun, 15 Apr 2001 12:51:59 +0000 (-0000) Subject: untar changed to allow deb_extract to extract to memory, allows better operation... X-Git-Tag: 0_52~349 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=685f5fd6f473f802b465500d5ec7c1baba0ec357;p=oweals%2Fbusybox.git untar changed to allow deb_extract to extract to memory, allows better operation of dpkg-deb -f --- diff --git a/include/libbb.h b/include/libbb.h index 515bf2760..569ed9397 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -239,7 +239,9 @@ typedef enum extract_function_e { 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, const int untar_function, const char *argument); +extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument); +extern char *read_text_file_to_buffer(FILE *src_file); +extern char *read_package_field(const char *package_buffer); extern int unzip(FILE *l_in_file, FILE *l_out_file); extern void gz_close(int gunzip_pid); diff --git a/libbb/deb_extract.c b/libbb/deb_extract.c index 0f5a570b6..b95dfa4d4 100644 --- a/libbb/deb_extract.c +++ b/libbb/deb_extract.c @@ -75,11 +75,24 @@ extern int deb_extract(const char *package_filename, int function, char *argumen if (function & extract_fsys_tarfile) { copy_file_chunk(uncompressed_file, stdout, -1); } else { - untar(uncompressed_file, function, argument); + char *output_buffer = NULL; + output_buffer = untar(uncompressed_file, stdout, function, argument); + if (function & 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); + } + } } - /* we are deliberately terminating the child so we can safely ignore this */ - gz_close(gunzip_pid); + gz_close(gunzip_pid); fclose(deb_file); fclose(uncompressed_file); free(ared_file); diff --git a/libbb/libbb.h b/libbb/libbb.h index 515bf2760..569ed9397 100644 --- a/libbb/libbb.h +++ b/libbb/libbb.h @@ -239,7 +239,9 @@ typedef enum extract_function_e { 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, const int untar_function, const char *argument); +extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument); +extern char *read_text_file_to_buffer(FILE *src_file); +extern char *read_package_field(const char *package_buffer); 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 b768c0be8..e70032c60 100644 --- a/libbb/untar.c +++ b/libbb/untar.c @@ -22,7 +22,7 @@ #include #include "libbb.h" -extern int untar(FILE *src_tar_file, const int untar_function, const char *argument) +extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument) { typedef struct raw_tar_header { char name[100]; /* 0-99 */ @@ -103,13 +103,12 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum } if (untar_function & (extract_contents | extract_verbose_extract)) { - printf("%s\n", raw_tar_header.name); + fprintf(output, "%s\n", raw_tar_header.name); } /* extract files */ 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); + dir = concat_path_file(argument, raw_tar_header.name); create_path(dir, 0777); } @@ -120,33 +119,27 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum * supposed to be a directory, and fall through */ if (raw_tar_header.name[strlen(raw_tar_header.name)-1] != '/') { - if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) { - FILE *dst_file = wfopen(dir, "w"); - copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size); - uncompressed_count += size; - fclose(dst_file); - } - 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); - } - } - } + switch (untar_function) { + case (extract_extract): + case (extract_verbose_extract): + case (extract_control): { + FILE *dst_file = wfopen(dir, "w"); + copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size); + uncompressed_count += size; + fclose(dst_file); + } + break; + case (extract_info): + if (strstr(raw_tar_header.name, argument) != NULL) { + copy_file_chunk(src_tar_file, stdout, (unsigned long long) size); + uncompressed_count += size; + } + break; + case (extract_field): + if (strstr(raw_tar_header.name, "control") != NULL) { + return(read_text_file_to_buffer(src_tar_file)); + } + break; } break; } @@ -155,7 +148,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum if (create_path(dir, mode) != TRUE) { free(dir); perror_msg("%s: Cannot mkdir", raw_tar_header.name); - return(EXIT_FAILURE); + return NULL; } } break; @@ -164,7 +157,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) { free(dir); perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname); - return(EXIT_FAILURE); + return NULL; } } break; @@ -173,7 +166,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) { free(dir); perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname); - return(EXIT_FAILURE); + return NULL; } } break; @@ -186,7 +179,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum default: error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag); free(dir); - return(EXIT_FAILURE); + return NULL; } /* @@ -201,5 +194,5 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum // free(dir); } - return(EXIT_SUCCESS); + return NULL; }