Get the uid and gid of the child process
#include <posix_spawnattr.h> int posix_spawnattr_getcred( const posix_spawnattr_t *_Restrict attrp, uid_t *_Restrict uid_p, gid_t *_Restrict gid_p);
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Use the posix_spawnattr_getcred() function to allow the caller to retrieve the uid and gid of the posix_spawnattr_t attributes object set using the posix_spawnattr_setcred() function.
The posix_spawnattr_getcred() function call returns the current credential values of the posix_spawnattr_t object and not necessarily the credentials that will be used by the spawned process. For example, if the POSIX_SPAWNATTR_SETCRED flag isn't set, the credentials returned by posix_spawnattr_getcred() will be ignored.
Use the posix_spawnattr_setcred() function to set the credentials of a spawned process to something other than that of the caller's credentials. Typically, the credentials (i.e. the user ID and group ID) for a process spawned with posix_spawn() and posix_spawnp() inherit the credentials from the calling function.
Upon successful completion, posix_spawnattr_setflags() returns zero; otherwise, an error number is returned to indicate the error (errno is set).
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |
posix_spawn(), posix_spawn_file_actions_addclose(), posix_spawn_file_actions_adddup2(), posix_spawn_file_actions_addopen(), posix_spawn_file_actions_destroy(), posix_spawn_file_actions_init(), posix_spawnattr_addpartid(), posix_spawnattr_addpartition(), posix_spawnattr_destroy(), posix_spawnattr_getflags(), posix_spawnattr_getnode(), posix_spawnattr_getpartid(), posix_spawnattr_getpgroup(), posix_spawnattr_getrunmask(), posix_spawnattr_getschedparam(), posix_spawnattr_getschedpolicy(), posix_spawnattr_getsigdefault(), posix_spawnattr_getsigignore(), posix_spawnattr_getsigmask(), posix_spawnattr_getstackmax(), posix_spawnattr_getxflags(), posix_spawnattr_init(), posix_spawnattr_setcred(), posix_spawnattr_setnode(), posix_spawnattr_setpgroup(), posix_spawnattr_setschedparam(), posix_spawnattr_setrunmask(), posix_spawnattr_setschedpolicy(), posix_spawnattr_setsigdefault(), posix_spawnattr_setsigignore(), posix_spawnattr_setsigmask(), posix_spawnattr_setstackmax(), posix_spawnattr_setxflags(), posix_spawnp()