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author | Eric Andersen <andersen@codepoet.org> | 2000-11-29 21:39:02 +0000 |
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committer | Eric Andersen <andersen@codepoet.org> | 2000-11-29 21:39:02 +0000 |
commit | 4bfb6b7b67ff4238fde52e4019efe2284b9f99ef (patch) | |
tree | e9e09f6d93fc8e16b2fd13844b07beede33176d8 /unrpm.c | |
parent | e500d2083560b2988e7e48e00ba836ce0450c656 (diff) | |
download | busybox-4bfb6b7b67ff4238fde52e4019efe2284b9f99ef.tar.gz |
Finish commit of rpmunpack and add in scripts for undeb and unrpm
Diffstat (limited to 'unrpm.c')
-rw-r--r-- | unrpm.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/unrpm.c b/unrpm.c deleted file mode 100644 index 26989e8b6..000000000 --- a/unrpm.c +++ /dev/null @@ -1,140 +0,0 @@ -/* - * Mini unrpm implementation 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 "busybox.h" -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <fcntl.h> -#include <string.h> - -/* - * Some general definitions - */ -#define BUFSIZE 512 -#define RPM_MAGIC "\355\253\356\333" -#define GZ_MAGIC_1 '\037' -#define GZ_MAGIC_2 '\213' - -/* - * Global variables - */ -static char buffer[BUFSIZE]; -static char *progname; -static int infile, outfile; - -/* - * Read a specified number of bytes from input file - */ -static void myread(int num) -{ - int err; - - if ((err = read(infile, buffer, num)) != num) { - if (err < 0) - perror(progname); - else - fprintf(stderr, "unexpected end of input file\n"); - exit(1); - } -} - -/* - * Main program - */ -int unrpm_main(int argc, char **argv) -{ - int len, status = 0; - - /* 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]=='-') { - usage(unrpm_usage); - } - - /* Open input file */ - if (argc == 1) - infile = STDIN_FILENO; - else if ((infile = open(argv[1], O_RDONLY)) < 0) { - perror(progname); - exit(1); - } - - /* Read magic ID and output filename */ - myread(4); - if (strncmp(buffer, RPM_MAGIC, 4)) { - fprintf(stderr, "input file is not in RPM format\n"); - exit(1); - } - myread(6); /* Skip flags */ - myread(64); - 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(progname); - exit(1); - } - - /* - * 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); - while (status < 2) { - myread(1); - 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(progname); - exit(1); - } - - /* Now simply copy the GZIP archive into the output file */ - while ((len = read(infile, buffer, BUFSIZE)) > 0) { - if (write(outfile, buffer, len) < 0) { - perror(progname); - exit(1); - } - } - if (len < 0) { - perror(progname); - exit(1); - } - close(outfile); - close(infile); - exit(0); -} |