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POSIX_SPAWNATTR_INIT(3) BSD Library Functions Manual POSIX_SPAWNATTR_INIT(3) NAME posix_spawnattr_init posix_spawnattr_destroy -- initialize or destroy a spawn attributes object 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 the object referenced by attr, to an empty set of spawn attributes for subsequent use in a call to posix_spawn(2) or posix_spawnp(2). A posix_spawnattr_t object is an opaque type that is used to collect set of spawn attributes specified by calls to posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3), posix_spawnattr_setsigmask(3), posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3), or posix_spawnattr_setexceptionports_np(3) such that once the spawn opera-tion operation tion is complete, the child process will have a different set of attributes than the parent. The order of these operations is unspecified and may change; programs should not depend on their ordering. The posix_spawnattr_destroy() function destroys the object referenced by attr which was previously intialized by posix_spawnattr_init(), returning any resources obtained at the time of initialization to the system for subsequent reuse. A posix_spawnattr_t may be reinitialized after having been destroyed, but must not be reused after destruction, unless it has been reinitialized. RETURN VALUES On success, these functions return 0; on failure they return an error number from <errno.h>. ERRORS The posix_spawnattr_init() and posix_spawnattr_destroy() functions will fail and return an error if: [ENOMEM] Insufficient resources to initialize the posix_spawnattr_t object. [EINVAL] The posix_spawnattr_t being destroyed is invalid. SEE ALSO posix_spawn(2), posix_spawnp(2), posix_spawnattr_setflags(3), posix_spawnattr_setpgroup(3), posix_spawnattr_setsigdefault(3), posix_spawnattr_setsigmask(3), posix_spawnattr_setbinpref_np(3), posix_spawnattr_setspecialport_np(3), posix_spawnattr_setexceptionports_np(3) STANDARDS Version 3 of the Single UNIX Specification (``SUSv3'') [SPN] HISTORY The posix_spawn() and posix_spawnp() function calls appeared in Version 3 of the Single UNIX Specification (``SUSv3'') [SPN]. Mac OS X August 22, 2007 Mac OS X |