Messages in this thread | | | Date | Wed, 01 Oct 2008 10:01:30 -0000 | From | Thomas Gleixner <> | Subject | [RFC patch 0/3] signals: add rt_tgsigqueueinfo syscall V2 |
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Changes vs. V1: compat_sys_rt_sigqueueinfo implemented. Thanks Roland !
sys_kill has a counterpart sys_tgkill which allows to send signals to a particular thread. sys_rt_sigqueueinfo is lacking such a counterpart.
Aside of the asymetry it is a show stopper for migrating applications from other unix-alike RTOSes.
The following patch series implements rt_tgsigqueueinfo and hooks it up for x86.
Find below the raw documentation.
Thanks,
tglx
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NAME rt_tgsigqueueinfo - Send signal information to a signal to a thread
SYNOPSIS long sys_rt_tgsigqueueinfo (int tgid, int tid, int sig, siginfo_t *uinfo);
DESCRIPTION
rt_tgsigqueueinfo sends signal sig information uinfo to the thread with the thread ID tid in the thread group tgid. (By contrast, rt_sigqueueinfo(2) can only be used to send a signal info to a process (i.e., thread group) as a whole, and the signal will be delivered to an arbitrary thread within that process.)
RETURN VALUE
rt_tgsigqueueinfo returns 0 on success; otherwise, rt_sigqueueinfo returns one of the errors listed in the "Errors" section.
ERRORS -EFAULT An invalid value for uinfo was specified.
-EINVAL An invalid TID, TGID or signal was specified.
-EPERM Permission denied. For the required permissions, see rt_sigqueueinfo(2).
-ESRCH No process with the specified thread ID and thread group ID exists.
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