sigsend(2) - osol9

1sigsend(2)                       System Calls                       sigsend(2)
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NAME

6       sigsend,  sigsendset  -  send  a signal to a process or a group of pro‐
7       cesses
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SYNOPSIS

10       #include <signal.h>
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12       int sigsend(idtype_t idtype, id_t id, int sig);
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15       int sigsendset(procset_t *psp, int sig);
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DESCRIPTION

19       The sigsend() function sends a signal to the process or group  of  pro‐
20       cesses  specified  by id and idtype. The signal to be sent is specified
21       by sig and is either  0 or one of the values listed in signal.h(3HEAD).
22       If sig is  0 (the null signal), error checking is performed but no sig‐
23       nal is actually sent.  This value can be used to check the validity  of
24       id and  idtype.
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27       The  real  or  effective  user ID of the sending process must match the
28       real  or  saved  user  ID  of  the  receiving   process,   unless   the
29       {PRIV_PROC_OWNER}  privilege  is  asserted  in the effective set of the
30       sending process or sig is SIGCONT and the sending  process has the same
31       session ID as the receiving process.
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34       If idtype is  P_PID, sig is sent to the process with process ID id.
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37       If  idtype  is  P_PGID, sig is sent to all processes with process group
38       ID id.
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41       If idtype is  P_SID, sig is sent to all processes with session ID id.
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44       If idtype is  P_TASKID, sig is sent to all processes with task ID id.
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47       If idtype is  P_UID, sig is sent to any process with effective user  ID
48       id.
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51       If idtype is  P_GID, sig is sent to any process with effective group ID
52       id.
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55       If idtype is  P_PROJID, sig is sent to any process with project ID id.
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58       If idtype is  P_CID, sig is sent to any process with   scheduler  class
59       ID id (see priocntl(2)).
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62       If  idtype is  P_CTID, sig is sent to any process with process contract
63       ID id.
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66       If idtype is  P_ALL, sig is sent to all processes and id is ignored.
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69       If id is  P_MYID, the value of id is taken from the calling process.
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72       The process with a process ID of 0 is  always  excluded.   The  process
73       with a process ID of 1 is excluded unless idtype is equal to  P_PID.
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76       The  sigsendset()  function provides an alternate interface for sending
77       signals to sets of processes. This function sends signals to the set of
78       processes  specified  by  psp.  psp is a pointer to a structure of type
79       procset_t, defined in <sys/procset.h>,  which  includes  the  following
80       members:
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82         idop_t    p_op;
83         idtype_t  p_lidtype;
84         id_t      p_lid;
85         idtype_t  p_ridtype;
86         id_t      p_rid;
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90       The  p_lidtype  and  p_lid  members  specify  the ID type and ID of one
91       ("left") set of processes; the p_ridtype and p_rid members specify  the
92       ID type and ID of a second ("right") set of processes. ID types and IDs
93       are specified just as for the idtype and id arguments to sigsend(). The
94       p_op  member specifies the operation to be performed on the two sets of
95       processes to get the set of processes the function is to apply to.  The
96       valid values for p_op and the processes they specify are:
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98       POP_DIFF    Set difference: processes in left set and not in right set.
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101       POP_AND     Set intersection: processes in both left and right sets.
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104       POP_OR      Set union: processes in either left or right set or both.
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107       POP_XOR     Set exclusive-or: processes in left or right set but not in
108                   both.
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RETURN VALUES

112       Upon successful completion, 0 is return.  Otherwise, −1 is returned and
113       errno is set to indicate the error.
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ERRORS

116       The sigsend() and sigsendset() functions will fail if:
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118       EINVAL    The  sig argument is not a valid signal number, or the idtype
119                 argument is not a valid idtype field.
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122       EINVAL    The sig argument is  SIGKILL, idtype is  P_PID and id  is   1
123                 (proc1).
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126       EPERM     The  effective user of the calling process does not match the
127                 real or saved user ID of the receiving process,  the  calling
128                 process   does   not  have  the  {PRIV_PROC_OWNER}  privilege
129                 asserted in the effective set, and the calling process is not
130                 sending SIGCONT to a process that shares the same session ID.
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132                 The  calling  process  does  not have the {PRIV_PROC_SESSION}
133                 privilege asserted and is  trying  to  send  a  signal  to  a
134                 process  with  a different session ID, even though the effec‐
135                 tive user ID matches the real or saved ID  of  the  receiving
136                 process.
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139       ESRCH     No process can be found corresponding to that specified by id
140                 and idtype.
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144       The  sigsendset() function will fail if:
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146       EFAULT    The psp argument points to an illegal address.
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NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

ERRORS

SEE ALSO