New common unarchive code.

git-svn-id: svn://busybox.net/trunk/busybox@5589 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 56 insertions, 0 deletions

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 869c04a4c..2249e263a 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -19,10 +19,13 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <fcntl.h>
 #include "libbb.h"
 
 
@@ -85,6 +88,59 @@ FILE *xfopen(const char *path, const char *mode)
         return fp;
 }
 
+extern int xopen(const char *pathname, int flags)
+{
+        int ret;
+        
+        ret = open(pathname, flags);
+        if (ret == -1) {
+                perror_msg_and_die("%s", pathname);
+        }
+        return ret;
+}
+
+extern ssize_t xread(int fd, void *buf, size_t count)
+{
+        ssize_t size;
+
+        size = read(fd, buf, count);
+        if (size == -1) {
+                perror_msg_and_die("Read error");
+        }
+        return(size);
+}
+
+extern void xread_all(int fd, void *buf, size_t count)
+{
+        ssize_t size;
+
+        size = xread(fd, buf, count);
+        if (size != count) {
+                error_msg_and_die("Short read");
+        }
+        return;
+}
+
+extern ssize_t xread_all_eof(int fd, void *buf, size_t count)
+{
+        ssize_t size;
+
+        size = xread(fd, buf, count);
+        if ((size != 0) && (size != count)) {
+                error_msg_and_die("Short read");
+        }
+        return(size);
+}
+
+extern unsigned char xread_char(int fd)
+{
+        char tmp;
+        
+        xread_all(fd, &tmp, 1);
+
+        return(tmp);    
+}
+
 /* Stupid gcc always includes its own builtin strlen()... */
 #undef strlen
 size_t xstrlen(const char *string)