+/***********************************************************
+ * NOT USING LIBZIP: FORKING
+ ***********************************************************/
+#else
+
+#include <sys/wait.h>
+#include <stdlib.h>
+
+extern char **environ;
+
+static char *getbin(const char *progname)
+{
+ char name[PATH_MAX];
+ char *path;
+ int i;
+
+ if (progname[0] == '/')
+ return access(progname, X_OK) ? NULL : strdup(progname);
+
+ path = getenv("PATH");
+ while(path && *path) {
+ for (i = 0 ; path[i] && path[i] != ':' ; i++)
+ name[i] = path[i];
+ path += i + !!path[i];
+ name[i] = '/';
+ strcpy(name + i + 1, progname);
+ if (access(name, X_OK) == 0)
+ return realpath(name, NULL);
+ }
+ return NULL;
+}
+
+static int zrun(const char *name, const char *args[])
+{
+ int rc;
+ siginfo_t si;
+ char *binary;
+
+ binary = getbin(name);
+ if (binary == NULL) {
+ ERROR("error while forking in zrun: can't find %s", name);
+ return -1;
+ }
+
+ rc = fork();
+ if (rc == 0) {
+ rc = execve(binary, (char * const*)args, environ);
+ ERROR("can't execute %s in zrun: %m", args[0]);
+ _exit(1);
+ return rc;
+ }
+
+ free(binary);
+ if (rc < 0) {
+ /* can't fork */
+ ERROR("error while forking in zrun: %m");
+ return rc;
+ }
+
+ /* wait termination of the child */
+ rc = waitid(P_PID, (id_t)rc, &si, WEXITED);
+ if (rc)
+ ERROR("unexpected wait status in zrun of %s: %m", args[0]);
+ else if (si.si_code != CLD_EXITED)
+ ERROR("unexpected termination status of %s in zrun", args[0]);
+ else if (si.si_status != 0)
+ ERROR("child for %s terminated with error code %d in zwrite", args[0], si.si_status);
+ else
+ return 0;
+ return -1;
+}
+
+/* read (extract) 'zipfile' in current directory */
+int zread(const char *zipfile, unsigned long long maxsize)
+{
+ int rc;
+ const char *args[6];
+
+ args[0] = "unzip";
+ args[1] = "-q";
+ args[2] = "-d";
+ args[3] = workdir;
+ args[4] = zipfile;
+ args[5] = NULL;
+
+ file_reset();
+ rc = zrun(args[0], args);
+ if (!rc)
+ rc = fill_files();
+ return rc;
+}
+
+/* write (pack) content of the current directory in 'zipfile' */
+int zwrite(const char *zipfile)
+{
+ const char *args[6];
+
+ args[0] = "zip";
+ args[1] = "-q";
+ args[2] = "-r";
+ args[3] = zipfile;
+ args[4] = workdir;
+ args[5] = NULL;
+
+ return zrun(args[0], args);
+}
+
+#endif
+/***********************************************************
+* TESTING
+***********************************************************/