#include <zlib.h>
-static int
-Usage(char *name)
+static void
+Usage (char *name)
{
- fprintf(stderr,"Usage: %s file.tar.gz [base-dir]\n",name);
- fprintf(stderr,"\tExtracts the contents compressed tar file to base-dir\n");
- exit(-1);
+ fprintf (stderr, "Usage: %s file.tar.gz [base-dir]\n", name);
+ fprintf (stderr, "\tExtracts the contents compressed tar file to base-dir\n");
+ exit (-1);
}
#define MAXNAMELEN 1024
static int
-octal(char *str)
+octal (char *str)
{
int ret = -1;
- sscanf(str,"%o",&ret);
+ sscanf (str, "%o", &ret);
return ret;
}
path component, so it is not created as a directory */
static int
-makepath(char *path)
+makepath (char *path)
{
char tmp[MAXNAMELEN];
char *cp;
- for (cp=path; cp; cp = (char*)strchr(cp+1,'/')){
- if (!*cp)
- break;
- if (*cp != '/')
- continue;
- strncpy(tmp, path, cp-path);
- tmp[cp-path] = '\0';
- if (strlen(tmp) == 0)
- continue;
+ for (cp=path; cp; cp = (char*)strchr (cp+1, '/'))
+ {
+ if (!*cp)
+ break;
+ if (*cp != '/')
+ continue;
+ strncpy (tmp, path, cp-path);
+ tmp[cp-path] = '\0';
+ if (strlen (tmp) == 0)
+ continue;
#ifdef WIN32_NATIVE
- if (mkdir(tmp)){
+ if (mkdir (tmp))
#else
- if (mkdir(tmp,0777)){
+ if (mkdir (tmp, 0777))
#endif
- if (errno == EEXIST)
- continue;
- else
- return -1;
+ {
+ if (errno == EEXIST)
+ continue;
+ else
+ return -1;
+ }
}
- }
return 0;
}
-
-
+
int
-main(int argc, char **argv)
+main (int argc, char **argv)
{
char fullname[MAXNAMELEN];
char *basedir = ".";
int directory = 0;
if (argc < 2 || argc > 3)
- Usage(argv[0]);
+ Usage (argv[0]);
tarfile = argv[1];
if (argc==3)
basedir = argv[2];
- if (! (infile = gzopen(tarfile,"rb"))){
- fprintf(stderr,"Cannot open %s\n", tarfile);
- exit(-2);
- }
-
- while (1){
-
-
- nread = gzread(infile,block,512);
-
- if (!in_block && nread == 0)
- break;
-
- if (nread != BLOCKSIZE){
- fprintf(stderr,"Error: incomplete block read. Exiting.\n");
- exit(-2);
+ if (! (infile = gzopen (tarfile, "rb")))
+ {
+ fprintf (stderr, "Cannot open %s\n", tarfile);
+ exit (-2);
}
+
+ while (1)
+ {
+ nread = gzread (infile, block, 512);
- if (!in_block){
- if (block[0]=='\0') /* We're done */
+ if (!in_block && nread == 0)
break;
- strncpy(magic,block+257,6);
- magic[6] = '\0';
- if (strcmp(magic,"ustar ")){
- fprintf(stderr,
- "Error: incorrect magic number in tar header. Exiting\n");
- }
-
- strncpy(name,block,100);
- name[100] = '\0';
- sprintf(fullname,"%s/%s",basedir,name);
- printf("%s\n",fullname);
- type = block[156];
+ if (nread != BLOCKSIZE)
+ {
+ fprintf (stderr, "Error: incomplete block read. Exiting.\n");
+ exit (-2);
+ }
+
+ if (!in_block)
+ {
+ if (block[0]=='\0') /* We're done */
+ break;
+
+ strncpy (magic, block+257, 6);
+ magic[6] = '\0';
+ if (strcmp (magic, "ustar "))
+ {
+ fprintf (stderr,
+ "Error: incorrect magic number in tar header. Exiting\n");
+ exit (-2);
+ }
+
+ strncpy (name, block, 100);
+ name[100] = '\0';
+ sprintf (fullname, "%s/%s", basedir, name);
+ printf ("%s\n", fullname);
+ type = block[156];
- switch(type){
- case '0':
- case '\0':
- directory = 0;
- break;
- case '5':
- directory = 1;
- break;
- default:
- fprintf(stderr,"Error: unknown type flag %c. Exiting.\n",type);
- break;
- }
+ switch (type)
+ {
+ case '0':
+ case '\0':
+ directory = 0;
+ break;
+ case '5':
+ directory = 1;
+ break;
+ default:
+ fprintf (stderr, "Error: unknown type flag %c. Exiting.\n", type);
+ exit (-2);
+ break;
+ }
- if (directory){
- in_block = 0;
+ if (directory)
+ {
+ in_block = 0;
- /* makepath will ignore the final path component, so make sure
- dirnames have a trailing slash */
-
- if (fullname[strlen(fullname)-1] != '/')
- strcat(fullname,"/");
- if (makepath(fullname)){
- fprintf(stderr, "Error: cannot create directory %s. Exiting.\n",
- fullname);
- exit(-2);
+ /* makepath will ignore the final path component, so make sure
+ dirnames have a trailing slash */
+
+ if (fullname[strlen (fullname)-1] != '/')
+ strcat (fullname, "/");
+ if (makepath (fullname))
+ {
+ fprintf (stderr, "Error: cannot create directory %s. Exiting.\n",
+ fullname);
+ exit (-2);
+ }
+ continue;
+ }
+ else
+ { /*file */
+ in_block = 1;
+ if (outfile)
+ {
+ if (fclose (outfile))
+ {
+ fprintf (stderr, "Error: cannot close file %s. Exiting.\n",
+ fullname);
+ exit (-2);
+ }
+ outfile = (FILE*)0;
+ }
+
+ if (!(outfile = fopen (fullname, "wb")))
+ {
+ /*try creating the directory, maybe it's not there */
+ if (makepath (fullname))
+ {
+ fprintf (stderr, "Error: cannot create file %s. Exiting.\n",
+ fullname);
+ exit (-2);
+ }
+ /* now try again to open the file */
+ if (!(outfile = fopen (fullname, "wb")))
+ {
+ fprintf (stderr, "Error: cannot create file %s. Exiting.\n",
+ fullname);
+ exit (-2);
+ }
+ }
+
+ strncpy (osize, block+124, 12);
+ osize[12] = '\0';
+ size = octal (osize);
+ if (size<0)
+ {
+ fprintf (stderr, "Error: invalid size in tar header. Exiting.\n");
+ exit (-2);
+ }
+ if (size==0) /* file of size 0 is done */
+ in_block = 0;
+ }
}
- continue;
- } else { /*file */
- in_block = 1;
- if (outfile){
- if (fclose(outfile)){
- fprintf(stderr,"Error: cannot close file %s. Exiting.\n",
- fullname);
- exit(-2);
- }
- outfile = (FILE*)0;
- }
-
- if ( !(outfile = fopen(fullname,"wb"))){
- /*try creating the directory, maybe it's not there */
- if (makepath(fullname)){
- fprintf(stderr,"Error: cannot create file %s. Exiting.\n",
- fullname);
- exit(-2);
- }
- /* now try again to open the file */
- if (!(outfile = fopen(fullname,"wb"))){
- fprintf(stderr,"Error: cannot create file %s. Exiting.\n",
- fullname);
- exit(-2);
- }
- }
-
- strncpy(osize,block+124,12);
- osize[12] = '\0';
- size = octal(osize);
- if (size<0){
- fprintf(stderr,"Error: invalid size in tar header. Exiting.\n");
- exit(-2);
- }
- }
- } else { /* write or continue writing file contents */
- nbytes = size>512? 512:size;
+ else
+ { /* write or continue writing file contents */
+ nbytes = size>512? 512:size;
- nwritten = fwrite(block, 1, nbytes, outfile);
- if (nwritten != nbytes){
- fprintf(stderr, "Error: only wrote %d bytes to file %s. Exiting.\n",
- nwritten, fullname);
- }
- size -= nbytes;
- if (size==0)
- in_block = 0;
+ nwritten = fwrite (block, 1, nbytes, outfile);
+ if (nwritten != nbytes)
+ {
+ fprintf (stderr, "Error: only wrote %d bytes to file %s. Exiting.\n",
+ nwritten, fullname);
+ exit (-2);
+ }
+ size -= nbytes;
+ if (size==0)
+ in_block = 0;
+ }
}
- }
- exit (0);
-}
-
+ return 0;
+}
projects / chise / xemacs-chise.git.1 / blobdiff