Hi I'm trying to debug what goes wrong with bb-larrdcolumn on NetBSD: # ./bb-larrdcolumn Memory fault (core dumped) Is there a particular command line usage to get closer to how it is executed during normal operation? gdb says that: Program received signal SIGSEGV, Segmentation fault. 0x480e000c in strcpy () from /usr/lib/libc.so.12 (gdb) bt #0 0x480e000c in strcpy () from /usr/lib/libc.so.12 #1 0x0807cde0 in fdhead () #2 0x0804b540 in load_hostnames (bbhostsfn=0x0, extrainclude=0x0, fqdn=1, docurl=0x0) at loadhosts_file.c:61 #3 0x0804a17d in main (argc=1, argv=0xbfbfedac) at bb-larrdcolumn.c:439 #4 0x080494c2 in ___start () Defining BBHOSTS and BBVAR in the environement works around theses crashes I suggest the following patch: --- bb-larrdcolumn.c.orig 2005-01-17 14:46:56.000000000 +0100 +++ bb-larrdcolumn.c 2005-01-17 14:48:59.000000000 +0100 @@ -428,8 +428,18 @@ } - if (bbhostsfn == NULL) bbhostsfn = getenv("BBHOSTS"); + if ((bbhostsfn == NULL) && + ((bbhostsfn = getenv("BBHOSTS")) == NULL) { + errprintf("BBHOSTS is not defined"); + exit(1); + } + if (rrddir == NULL) { char dname[PATH_MAX]; + if (getenv("BBVAR") == NULL) { + errprintf("BBVAR is not defined"); + exit(1); + } + sprintf(dname, "%s/rrd", getenv("BBVAR")); rrddir = strdup(dname); If BBHOSTS and BBVAR are defined, it still crashes. Program received signal SIGSEGV, Segmentation fault. generate_larrd (rrddirname=0x807e060 "/usr/pkg/hobbit/data/rrd", larrdcolumn=0x8051c47 "trends", larrd043=1, hobbitd=0) at bb-larrdcolumn.c:337 337 while (graph->larrdrrdname) { (gdb) bt #0 generate_larrd (rrddirname=0x807e060 "/usr/pkg/hobbit/data/rrd", larrdcolumn=0x8051c47 "trends", larrd043=1, hobbitd=0) at bb-larrdcolumn.c:337 #1 0x0804a19b in main (argc=1, argv=0xbfbfed5c) at bb-larrdcolumn.c:442 #2 0x080494c2 in ___start () I'll try to dig a bit deeper here, but some hints will be appreciated -- Emmanuel Dreyfus manu at netbsd.org