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.Dd February 16, 2011 .Dt RUMPHIJACK 3 .Os .Sh NAME .Nm rumphijack .Nd System call hijack library .Sh LIBRARY used by .Xr ld.so 1 .Sh DESCRIPTION The .Xr ld.so 1 runtime linker can be instructed to load .Nm between the main object and other libraries. This enables .Nm to capture and redirect system call requests to a rump kernel instead of the host kernel.
p The behaviour of hijacked applications is affected by the following environment variables: l -tag -width 12345 t Dv RUMPHIJACK_RETRYCONNECT Change how .Xr rumpclient 3 attempts to reconnect to the server in case the connection is lost. Acceptable values are: l -tag -width xxinftimexx t Dq inftime retry indefinitely t Dq once retry once, when that connection fails, give up t Dq die call .Xr exit 3 if connection failure is detected t n Attempt reconnect for n seconds. The value 0 means reconnection is not attempted. The value n must be a positive integer. .El
p See .Xr rumpclient 3 for more discussion. .El
p Currently .Nm supports only TCP/IP related system calls. The set of supported subsystems may change later along with the usage of the library. .Sh EXAMPLES Use an alternate TCP/IP stack for firefox with a persistent server connection: d -literal -offset indent $ setenv RUMP_SERVER unix:///tmp/tcpip $ setenv LD_PRELOAD /usr/lib/librumphijack.so $ setenv RUMPHIJACK_RETRYCONNECT inftime $ firefox .Ed .Sh SEE ALSO .Xr ld.so 1 , .Xr rump_server 1 , .Xr rump 3 , .Xr rumpclient 3 , .Xr rump_sp 7
Indexes created Sun Oct 19 02:09:48 GMT 2025