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Shell Programming and Scripting
Can 'spawn' command be used more than once in an expect script ?
Post 302475338 by clakkad on Sunday 28th of November 2010 06:08:24 AM
11-28-2010
Can 'spawn' command be used more than once in an expect script ?
Can 'spawn' script be used more than once in a given expect script ??
What I'm trying to do is, first log-into a remote server through one 'ssh' spawn com and then from there log-into another server using a secod 'ssh' spawn command. But this approach is not working... the second ssh attempt fails saying something to the effect that the address given is in-correct.
OTOH, when I use the 'send' com to get that 2nd ssh executed, it works! However, I would like to use a second spawn to login than send....if that's possible.
So far , i've only seen expect scripts with singular spawn statements.. has anyone tried with two or more than that in a single script ?
What I'm trying to do is, first log-into a remote server through one 'ssh' spawn com and then from there log-into another server using a secod 'ssh' spawn command. But this approach is not working... the second ssh attempt fails saying something to the effect that the address given is in-correct.
OTOH, when I use the 'send' com to get that 2nd ssh executed, it works! However, I would like to use a second spawn to login than send....if that's possible.
So far , i've only seen expect scripts with singular spawn statements.. has anyone tried with two or more than that in a single script ?
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LEARN ABOUT FREEBSD
posix_spawnattr_destroy
POSIX_SPAWNATTR_INIT(3) BSD Library Functions Manual POSIX_SPAWNATTR_INIT(3) NAME
posix_spawnattr_init, posix_spawnattr_destroy -- initialize and destroy spawn attributes object LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <spawn.h> int posix_spawnattr_init(posix_spawnattr_t * attr); int posix_spawnattr_destroy(posix_spawnattr_t * attr); DESCRIPTION
The posix_spawnattr_init() function initializes a spawn attributes object attr with the default value for all of the individual attributes used by the implementation. Initializing an already initialized spawn attributes object may cause memory to be leaked. The posix_spawnattr_destroy() function destroys a spawn attributes object. A destroyed attr attributes object can be reinitialized using posix_spawnattr_init(). The object should not be used after it has been destroyed. A spawn attributes object is of type posix_spawnattr_t (defined in <spawn.h>) and is used to specify the inheritance of process attributes across a spawn operation. The resulting spawn attributes object (possibly modified by setting individual attribute values), is used to modify the behavior of posix_spawn() or posix_spawnp(). After a spawn attributes object has been used to spawn a process by a call to a posix_spawn() or posix_spawnp(), any function affecting the attributes object (including destruction) will not affect any process that has been spawned in this way. RETURN VALUES
Upon successful completion, posix_spawnattr_init() and posix_spawnattr_destroy() return zero; otherwise, an error number is returned to indi- cate the error. ERRORS
The posix_spawnattr_init() function will fail if: [ENOMEM] Insufficient memory exists to initialize the spawn attributes object. SEE ALSO
posix_spawn(3), posix_spawnp(3) STANDARDS
The posix_spawnattr_init() and posix_spawnattr_destroy() functions conform to IEEE Std 1003.1-2001 (``POSIX.1''). HISTORY
The posix_spawnattr_init() and posix_spawnattr_destroy() functions first appeared in FreeBSD 8.0. AUTHORS
Ed Schouten <ed@FreeBSD.org> BSD
March 24, 2008 BSD