Calling bb_daemonize_or_rexec() before opening the domain socket results in proper behavior.
busybox-zcip-daemonize.patch [^] (1,130 bytes) 01-30-08 13:06 
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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||||
| 0002019 | [BusyBox] Networking Support | minor | always | 01-30-08 13:06 | 02-28-08 09:06 | ||||
| Reporter | dajhorn | View Status | public | ||||||
| Assigned To | BusyBox | ||||||||
| Priority | normal | Resolution | unable to reproduce | ||||||
| Status | closed | Product Version | svn | ||||||
| Summary | 0002019: zcip fails to obtain or defend an IP address when daemonized | ||||||||
| Description |
The busybox zcip program fails to obtain or defend an IP address when it is started as a daemon because the bb_daemonize_or_rexec() function closes the sock_fd. Calling bb_daemonize_or_rexec() before opening the domain socket results in proper behavior. |
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| Additional Information | This patch works for me in a BB_MMU environment, but it should be tested with NOMMU. | ||||||||
| Attached Files |
busybox-zcip-daemonize.patch [^] (1,130 bytes) 01-30-08 13:06 |
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(0003664) vda 02-03-08 16:53 |
Why bb_daemonize_or_rexec() function closes the sock_fd? It is calling bb_daemonize_or_rexec(), which should never close any extra fds unless (flags & DAEMON_CLOSE_EXTRA_FDS) != 0. In zcip case, DAEMON_CLOSE_EXTRA_FDS is not set. I am confused. |
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(0003684) dajhorn 02-03-08 17:46 |
This bug was first discussed when xdaemon() was replaced. Perhaps it is a regression. http://www.uclibc.org/lists/busybox/2007-February.txt [^] When you try this patch, do you get different zcip behavior? |
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(0003694) vda 02-04-08 01:40 |
No, I don't see the difference. I think I know why. bb_daemonize is innocent. It's openlog! It opens new fd for logging, and if it happens to be fd 3, it gets reused for sock_fd later. We must open ARP socket before openlog. http://busybox.net/downloads/fixes-1.9.0/busybox-1.9.0-zcip.patch [^] should fix it. Please test this patch. |
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(0005514) vda 02-28-08 09:06 |
Tested again - current svn seems to work. |
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Issue History |
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| Date Modified | Username | Field | Change |
| 01-30-08 13:06 | dajhorn | New Issue | |
| 01-30-08 13:06 | dajhorn | Status | new => assigned |
| 01-30-08 13:06 | dajhorn | Assigned To | => BusyBox |
| 01-30-08 13:06 | dajhorn | File Added: busybox-zcip-daemonize.patch | |
| 02-03-08 16:53 | vda | Note Added: 0003664 | |
| 02-03-08 17:46 | dajhorn | Note Added: 0003684 | |
| 02-04-08 01:40 | vda | Note Added: 0003694 | |
| 02-28-08 09:06 | vda | Status | assigned => closed |
| 02-28-08 09:06 | vda | Note Added: 0005514 | |
| 02-28-08 09:06 | vda | Resolution | open => unable to reproduce |
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