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| -rw-r--r-- | rpmunpack.c | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/rpmunpack.c b/rpmunpack.c deleted file mode 100644 index 12e9c71..0000000 --- a/rpmunpack.c +++ /dev/null @@ -1,126 +0,0 @@ -/* - * rpmunpack for busybox - * - * rpmunpack.c - Utility program to unpack an RPM archive - * - * Gero Kuhlmann <gero@gkminix.han.de> 1998 - * - * This program is public domain software; you can do whatever you like - * with this source, including modifying and redistributing it. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - */ - -#include <fcntl.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> -#include "busybox.h" - -/* - * Some general definitions - */ - -#define RPM_MAGIC "\355\253\356\333" -#define GZ_MAGIC_1 '\037' -#define GZ_MAGIC_2 '\213' - -/* - * Global variables - */ -static char *progname; -static int infile, outfile; - -/* - * Read a specified number of bytes from input file - */ -static void myread(int num, char *buffer) -{ - int err; - - if ((err = read(infile, buffer, num)) != num) { - if (err < 0) - perror_msg_and_die(progname); - else - error_msg_and_die("Unexpected end of input file!"); - } -} - -/* - * Main program - */ -int rpmunpack_main(int argc, char **argv) -{ - int len, status = 0; - RESERVE_BB_BUFFER(buffer, BUFSIZ); - - /* Get our own program name */ - if ((progname = strrchr(argv[0], '/')) == NULL) - progname = argv[0]; - else - progname++; - - /* Check for command line parameters */ - if (argc>=2 && *argv[1]=='-') { - show_usage(); - } - - /* Open input file */ - if (argc == 1) - infile = STDIN_FILENO; - else if ((infile = open(argv[1], O_RDONLY)) < 0) - perror_msg_and_die("%s", argv[1]); - - /* Read magic ID and output filename */ - myread(4, buffer); - if (strncmp(buffer, RPM_MAGIC, 4)) { - fprintf(stderr, "Input file is not in RPM format!\n"); - exit(1); - } - myread(6, buffer); /* Skip flags */ - myread(64, buffer); - buffer[64] = '\0'; - - /* Open output file */ - strcat(buffer, ".cpio.gz"); - if (infile == STDIN_FILENO) - outfile = STDOUT_FILENO; - else if ((outfile = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, 0644)) < 0) - perror_msg_and_die("%s", buffer); - - /* - * Now search for the GZIP signature. This is rather awkward, but I don't - * know any other way how to find out the exact starting position of the - * archive within the input file. There are a couple of data structures - * and texts (obviously descriptions, installation shell scripts etc.) - * coming before the archive, but even they start at different offsets - * with different RPM files. However, it looks like the GZIP signature - * never appears before offset 0x200, so we skip these first couple of - * bytes to make the signature scan a little more reliable. - */ - myread(0x200 - 74, buffer); - while (status < 2) { - myread(1, buffer); - if (status == 0 && buffer[0] == GZ_MAGIC_1) - status++; - else if (status == 1 && buffer[0] == GZ_MAGIC_2) - status++; - else - status = 0; - } - buffer[0] = GZ_MAGIC_1; - buffer[1] = GZ_MAGIC_2; - if (write(outfile, buffer, 2) < 0) - perror_msg_and_die("write"); - - /* Now simply copy the GZIP archive into the output file */ - while ((len = read(infile, buffer, BUFSIZ)) > 0) { - if (write(outfile, buffer, len) < 0) - perror_msg_and_die("write"); - } - if (len < 0) - perror_msg_and_die("read"); - return EXIT_SUCCESS; -} |