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Diffstat (limited to 'tar.c')
| -rw-r--r-- | tar.c | 113 |
1 files changed, 113 insertions, 0 deletions
@@ -0,0 +1,113 @@ +/* + * 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <tar.h> + +#include "pax.h" + +static mode_t tar_mode_to_st_mode(char typeflag, const char tm[static 8]) +{ + uintmax_t mode = pax_atoi(8, tm, 8); + mode_t m = 0; + + switch (typeflag) { + case REGTYPE: + case AREGTYPE: + case LNKTYPE: + m = S_IFREG; + break; + + case SYMTYPE: + m = S_IFLNK; + break; + + case CHRTYPE: + m = S_IFCHR; + break; + + case BLKTYPE: + m = S_IFBLK; + break; + + case DIRTYPE: + m = S_IFDIR; + break; + + case FIFOTYPE: + m = S_IFIFO; + break; + + case CONTTYPE: + //m = S_IFCONT; + break; + + default: + fprintf(stderr, "pax: unknown file type '%c' (%hhx)\n", + typeflag, typeflag); + break; + } + + m |= (mode & TSUID) ? S_ISUID : 0; + m |= (mode & TSGID) ? S_ISGID : 0; + m |= (mode & TSVTX) ? S_ISVTX : 0; + + m |= (mode & TUREAD) ? S_IRUSR : 0; + m |= (mode & TUWRITE) ? S_IWUSR : 0; + m |= (mode & TUEXEC) ? S_IXUSR : 0; + + m |= (mode & TGREAD) ? S_IRGRP : 0; + m |= (mode & TGWRITE) ? S_IWGRP : 0; + m |= (mode & TGEXEC) ? S_IXGRP : 0; + + m |= (mode & TOREAD) ? S_IROTH : 0; + m |= (mode & TOWRITE) ? S_IWOTH : 0; + m |= (mode & TOEXEC) ? S_IXOTH : 0; + + return m; +} + +static struct stat tar_header_to_stat(struct tar_header *th) +{ + struct stat st = { 0 }; + st.st_mode = tar_mode_to_st_mode(th->typeflag[0], th->mode); + st.st_nlink = 1; + st.st_uid = pax_atoi(sizeof(th->uid), th->uid, 8); + st.st_gid = pax_atoi(sizeof(th->gid), th->gid, 8); + st.st_size = pax_atoi(sizeof(th->size), th->size, 8); + st.st_mtim.tv_sec = pax_atoi(sizeof(th->mtime), th->mtime, 8); + return st; +} + +int tar_list(FILE *input, size_t firstlen, void *firstblock) +{ + struct tar_header *th = firstblock; + struct stat st = tar_header_to_stat(th); + pax_list_file(&st, th->name); + return 0; +} |