diff options
Diffstat (limited to 'cpio.c')
| -rw-r--r-- | cpio.c | 114 |
1 files changed, 114 insertions, 0 deletions
@@ -0,0 +1,114 @@ +/* + * UNG's Not GNU + * + * Copyright (c) 2011-2019, Jakob Kaivo <jkk@ung.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#define _XOPEN_SOURCE 700 +#include <cpio.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> + +#include "pax.h" + +struct cpio_header { + char magic[6]; + char dev[6]; + char ino[6]; + char mode[6]; + char uid[6]; + char gid[6]; + char nlink[6]; + char rdev[6]; + char mtime[11]; + char namesize[6]; + char filesize[11]; +}; + +struct cpio_entry { + struct stat st; + uintmax_t namesize; +}; + +const size_t cpio_header_size = sizeof(struct cpio_header); + +static mode_t cpio_convert_mode(unsigned long mode) +{ + mode_t m = 0; + m |= (mode & C_IRUSR) ? S_IRUSR : 0; + m |= (mode & C_IWUSR) ? S_IWUSR : 0; + m |= (mode & C_IXUSR) ? S_IXUSR : 0; + + m |= (mode & C_IRGRP) ? S_IRGRP : 0; + m |= (mode & C_IWGRP) ? S_IWGRP : 0; + m |= (mode & C_IXGRP) ? S_IXGRP : 0; + + m |= (mode & C_IROTH) ? S_IROTH : 0; + m |= (mode & C_IWOTH) ? S_IWOTH : 0; + m |= (mode & C_IXOTH) ? S_IXOTH : 0; + + m |= (mode & C_ISUID) ? S_ISUID : 0; + m |= (mode & C_ISGID) ? S_ISGID : 0; + m |= (mode & C_ISVTX) ? S_ISVTX : 0; + + m |= (mode & C_ISDIR) ? S_IFDIR : 0; + m |= (mode & C_ISFIFO) ? S_IFIFO : 0; + m |= (mode & C_ISREG) ? S_IFREG : 0; + m |= (mode & C_ISBLK) ? S_IFBLK : 0; + m |= (mode & C_ISCHR) ? S_IFCHR : 0; + //m |= (mode & C_ISCTG) ? S_IFCTG : 0; + m |= (mode & C_ISLNK) ? S_IFLNK : 0; + m |= (mode & C_ISSOCK) ? S_IFSOCK : 0; + + return m; +} + +static struct cpio_entry cpio_deserialize(struct cpio_header *dh) +{ + struct cpio_entry e = { 0 }; + e.st.st_dev = pax_atoi(sizeof(dh->dev), dh->dev, 8); + e.st.st_ino = pax_atoi(sizeof(dh->ino), dh->ino, 8); + e.st.st_mode = cpio_convert_mode(pax_atoi(sizeof(dh->mode), dh->mode, 8)); + e.st.st_uid = pax_atoi(sizeof(dh->uid), dh->uid, 8); + e.st.st_gid = pax_atoi(sizeof(dh->gid), dh->gid, 8); + e.st.st_nlink = pax_atoi(sizeof(dh->nlink), dh->nlink, 8); + e.st.st_rdev = pax_atoi(sizeof(dh->rdev), dh->rdev, 8); + e.st.st_mtim.tv_sec = pax_atoi(sizeof(dh->mtime), dh->mtime, 8); + e.st.st_size = pax_atoi(sizeof(dh->filesize), dh->filesize, 8); + + e.namesize = pax_atoi(sizeof(dh->namesize), dh->namesize, 8); + + return e; +} + +int cpio_list(FILE *input, size_t firstlen, void *firstblock) +{ + struct cpio_header *dh = firstblock; + + //for (;;) { + struct cpio_entry e = cpio_deserialize(dh); + pax_list_file(&e.st, (char*)firstblock + sizeof(*dh)); + //} + + return 0; +} |