GRASS Programmer's Manual  6.4.2(2012)
open.h
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00001 /* quiet mode returns:   0 - open OK */
00002 /*                      -1 - driver locked */
00003 /*                      -2 - driver not running */
00004 /*                      -3 - can't open fifos */
00005 /*                      -4 - no such monitor */
00006 /*                      -5 - GIS_LOCK undefined in shell environment */
00007 /*                      -6 - couldn't read, write or create lock file */
00008 
00009 #define OK       0
00010 #define LOCKED  -1
00011 #define NO_RUN  -2
00012 #define NO_OPEN -3
00013 #define NO_MON  -4
00014 #define NO_KEY  -5
00015 #define LOCK_FAILED -6
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