diff options
Diffstat (limited to 'mdk-stage1/mar/mar-extract-only.c')
| -rw-r--r-- | mdk-stage1/mar/mar-extract-only.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/mdk-stage1/mar/mar-extract-only.c b/mdk-stage1/mar/mar-extract-only.c deleted file mode 100644 index 013631ce2..000000000 --- a/mdk-stage1/mar/mar-extract-only.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * Guillaume Cottenceau (gc@mandrakesoft.com) - * - * Copyright 2000 MandrakeSoft - * - * This software may be freely redistributed under the terms of the GNU - * public license. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -/* - * mar - The Mandrake Archiver - * - * An archiver that supports compression (through zlib). - * - */ - -/* - * This code should suffice for stage1 on-the-fly uncompression of kernel modules. - * (and it DOES perform tests and return values, blaaaah..) - */ - -#include "mar.h" - - -void gzerr(gzFile f) /* decrease code size */ -{ - fprintf(stderr, gzerror(f, &gz_errnum)); -} - -int calc_integrity(mar_stream *s) -{ - char buf[4096]; - int current_crc = 0; - if (gzseek(s->mar_gzfile, sizeof(int), SEEK_SET) != sizeof(int)) - { - gzerr(s->mar_gzfile); - return -1; - } - while (!gzeof(s->mar_gzfile)) - { - int bytes = gzread(s->mar_gzfile, buf, sizeof(buf)); - if (bytes == -1) - { - gzerr(s->mar_gzfile); - return -1; - } - DEBUG_MAR(printf("D: mar::calc_integrity more-bytes-to-handle-for-crc %d\n", bytes);); - while (bytes > 0) - { - bytes--; - current_crc += buf[bytes]; - } - } - DEBUG_MAR(printf("D: mar::calc_integrity computed-crc %d\n", current_crc);); - return current_crc; -} - - -int extract_file(mar_stream *s, char *filename, char *dest_dir) -{ - mar_element * elem = s->first_element; - while (elem != NULL) - { - if (strcmp(elem->filename, filename) == 0) - { - char *buf; - char *dest_file; - int fd; - dest_file = (char *) malloc(strlen(dest_dir) + strlen(filename) + 1); - strcpy(dest_file, dest_dir); - strcat(dest_file, filename); - fd = creat(dest_file, 00660); - if (fd == -1) - { - perror(dest_file); - return -1; - } - buf = (char *) malloc(elem->file_length); - if (buf == NULL) - { - perror(dest_file); - return -1; - } - if (gzseek(s->mar_gzfile, elem->data_offset, SEEK_SET) != elem->data_offset) - { - gzerr(s->mar_gzfile); - return -1; - } - if (gzread(s->mar_gzfile, buf, elem->file_length) != elem->file_length) - { - gzerr(s->mar_gzfile); - return -1; - } - if (write(fd, buf, elem->file_length) != elem->file_length) - { - perror(dest_file); - return -1; - } - close(fd); /* do not check return value for code size */ - return 0; - } - elem = elem->next_element; - } - return 1; /* 1 for file_not_found_in_archive */ -} - - -mar_stream * open_marfile(char *filename) -{ - int end_filetable = 0; - mar_stream * s = (mar_stream *) malloc(sizeof(mar_stream)); - mar_element * previous_element = NULL; - - /* mar_gzfile */ - s->mar_gzfile = gzopen(filename, "rb"); - if (s->mar_gzfile == NULL) - { - perror(filename); - return NULL; - } - - /* crc32 */ - if (gzread(s->mar_gzfile, &(s->crc32), sizeof(int)) != sizeof(int)) - { - gzerr(s->mar_gzfile); - return NULL; - } - - DEBUG_MAR(printf("D: mar::open_marfile crc-in-marfile %d\n", s->crc32);); - /* verify integrity */ - if (s->crc32 != calc_integrity(s)) - { - fprintf(stderr, "E: mar::open_marfile CRC check failed\n"); - return NULL; - } - else - if (gzseek(s->mar_gzfile, sizeof(int), SEEK_SET) != sizeof(int)) - { - gzerr(s->mar_gzfile); - return NULL; - } - - while (end_filetable == 0) - { - char buf[512]; - int ptr = 0; - /* read filename */ - do - { - if (gzread(s->mar_gzfile, &(buf[ptr]), sizeof(char)) != sizeof(char)) - { - gzerr(s->mar_gzfile); - return NULL; - } - ptr++; - } while ((buf[ptr-1] != 0) && (ptr < 512)); - /* ptr == 1 when we arrive on the "char 0" of the end of the filetable */ - if (ptr > 1) - { - mar_element * e = (mar_element *) malloc(sizeof(mar_element)); - e->filename = strdup(buf); - DEBUG_MAR(printf("D: mar::open_marfile processing-file %s\n", e->filename);); - /* read file_length */ - if (gzread(s->mar_gzfile, &(e->file_length), sizeof(int)) != sizeof(int)) - { - gzerr(s->mar_gzfile); - return NULL; - } - /* read data_offset */ - if (gzread(s->mar_gzfile, &(e->data_offset), sizeof(int)) != sizeof(int)) - { - gzerr(s->mar_gzfile); - return NULL; - } - /* write down chaining */ - if (previous_element == NULL) - s->first_element = e; - else - previous_element->next_element = e; - previous_element = e; - } - else - end_filetable = 1; - - } - /* chaining for last element */ - previous_element->next_element = NULL; - - return s; -} - |