uuUndo/uundo13.c

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2015-02-06 08:56:41 +00:00
/* * uundo.c: extract a multi-part uuencoded archive Version 1.3a * written by Aaron Giles 03/08/92 * * usage: * uundo [-hLloqv] file1 [file2 [...]] * uundo [-hLloqv] < file * * options: * -h header: write the article header of the earliest part to target.hdr * -L lower all: convert all characters in all filenames to lower case * -l lower: convert only all-upper-case filenames to lower case * -o overwrite: automatically overwrite existing files without permission * -q query: allow overwriting of existing files, but ask permission first * -v verbose: display part numbers and status info * * special features: * - does not require all parts to be in order* * - attempts to identify missing parts* * - works on uuencoded files included in shar archives * - can accept either single or multiple files on the command line * - can accept stream input from stdin * (* requires part numbering informating in the subject line of each part) * * bugs/requests/modifications to: * a-giles@uchicago.edu -or- * gile@midway.uchicago.edu -or- * giles@hep.uchicago.edu * * philosophy: * I will try my best to keep up with any bug reports (first priority) or * new feature requests. Note that my primary goal is robustness, so that * requests which would overly complicate things or result in "flaky" code * will very likely not be put in. * * copyright control: * This program is public domain, though copyrighted (c) 1992 by its * author, Aaron Giles. If you wish to distribute modified copies of * this program, please contact the author first. * * standard disclaimer: * Use this program at your own risk. The author takes no responsibility * for any loss of data or damage that results from using this program. * * known problems/limitations: * - cannot handle multiple target files in the same input file (sorry!) * - can't yet accept input piped from rn or trn * * to be added in future versions: * - support for saving header information * - support for piping, allowing use with rn/trn * * version history: * 1.0 (2/11/92) - initial release * 1.1 (2/13/92) - added stdin support for preliminary use with rn * no longer so restrictive on the first line of each part * added verbose option * added a warning to overwrite existing files * added an option to turn off this warning * now attempts to make file writeable before overwriting * fixed problem with "BEGIN..." lines fooling the decoder * 1.2 (2/21/92) - added force lowercase options * changed procedure dealing with conflicting filenames * added query option * now uses process ID in temporary names to avoid conflicts * output directory can be set via UUNDO environment variable * 1.21 (2/28/92) - fixed bug that would alter directory attributes if none * of the input files were found * 1.3 (3/08/92) - added support for maximum filename length * - refined handling of jumbled and unlabelled parts * - fixed the aforementioned bug -- again * - added option to write header of earliest part to a file */ #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <unistd.h> /* * Platform-specific definitions */ #define PATHSEP '/' /* path separator character */ #define MAXNAMELEN 32 /* maximum length of a given filename */ #define TEMPNAME "/usr/tmp/uu" /* prefix for temporary files */ /* * Arbitrary global definitions */ #define MAXLEN 256 /* maximum length of strings/pathnames */ #define MAXPARTS 256 /* maximum number of parts in file */ #define BUFSIZE 32768 /* size of temporary buffer */ /* * Header storage structure */ typedef struct he