1 files changed, 100 insertions, 0 deletions
diff --git a/todo/putback.c b/todo/putback.c
new file mode 100644
index 0000000..89c54e2
--- /dev/null
+++ b/todo/putback.c
@@ -0,0 +1,100 @@
+/*
+ * program putback
+ *
+ * puts back media in scsi-changer
+ *
+ * usage: /usr/sbin/putback
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include <linux/chio.h>
+
+#define PROG     "putback"
+#define CHANGER  "/dev/sch0"
+
+#define DEBUG 0  /* set to 1 for debug output */
+
+/* ---------------------------------------------------------------------- */
+
+int main(int argc, char *argv[])
+{
+    struct changer_params       params;
+    struct changer_get_element  *dt;
+    struct changer_move         move;
+    char                        *h;
+    int    fd,i,drive,cside;
+    
+    if (argc != 1) {
+	fprintf(stderr,"Usage: %s\n",argv[0]);
+	exit(1);
+    }
+
+    if (-1 == (fd = open(CHANGER,O_RDONLY))) {
+	perror(PROG ": open " CHANGER);
+	exit(1);
+    }
+
+    /* read changer status information */
+    if (ioctl(fd,CHIOGPARAMS,&params)) {
+	perror(PROG ": ioctl CHIOGPARAMS");
+	exit(1);
+    }
+#if DEBUG
+    fprintf(stderr,PROG ": %d drives, %d slots\n",
+	    params.cp_ndrives,params.cp_nslots);
+#endif
+
+    dt = malloc(sizeof(struct changer_get_element)*params.cp_ndrives);
+    for (i = 0; i < params.cp_ndrives; i++) {
+        dt[i].cge_type=CHET_DT;
+	dt[i].cge_unit=i;
+	if (ioctl(fd,CHIOGELEM,dt+i)) {
+	    fprintf(stderr,PROG ":ioctl CHIOGELEM mt %d: %s\n",
+		    i,strerror(errno));
+	    exit(1);
+	}
+	if (NULL != (h = strchr(dt[i].cge_pvoltag,' '))) *h = '\0';
+	if (NULL != (h = strchr(dt[i].cge_avoltag,' '))) *h = '\0';
+    }
+
+
+    for (drive=0; drive<params.cp_ndrives; drive++) {
+
+        if (dt[drive].cge_status & CESTATUS_FULL) {
+	    /* put back the old media ... */
+	    if (!(dt[drive].cge_flags & CGE_SRC)) {
+	        fprintf(stderr,PROG ": source element for drive %d unknown\n",
+			drive);
+		exit(1);
+	    }
+	    memset(&move,0,sizeof(struct changer_move));
+	    move.cm_totype   = dt[drive].cge_srctype;
+	    move.cm_tounit   = dt[drive].cge_srcunit;
+	    move.cm_fromtype = CHET_DT;
+	    move.cm_fromunit = drive;
+	    cside = ((dt[drive].cge_flags & CGE_INVERT) == CGE_INVERT);
+	    move.cm_flags    = (cside == 0) ? 0 : CM_INVERT;
+	    if (ioctl(fd,CHIOMOVE,&move)) {
+	        fprintf(stderr,PROG ": ioctl MOVE (unload): %s\n",
+			sys_errlist[errno]);
+		exit(1);
+	    }
+	}
+    }
+
+    exit(0);
+}
+
+