wait(3head) - osol9

1wait.h(3HEAD)                       Headers                      wait.h(3HEAD)
2
3
4

NAME

6       wait.h, wait - wait status
7

SYNOPSIS

9       #include <sys/wait.h>
10
11

DESCRIPTION

13       When  a  process  waits  for  status from its children using either the
14       wait(3C) or waitpid(3C) function, the status returned can be  evaluated
15       with the following macros, defined in <sys/wait.h>. These macros evalu‐
16       ate to integral expressions. The stat argument to these macros  is  the
17       integer value returned from wait() or waitpid().
18
19       WCOREDUMP(stat)       If  the  value of WIFSIGNALED (stat) is non-zero,
20                             this macro evaluates to a  non-zero  value  if  a
21                             core image of the terminated child was created.
22
23
24       WEXITSTATUS(stat)     If  the  value  of   WIFEXITED(stat) is non-zero,
25                             this macro evaluates to the exit  code  that  the
26                             child process passed to  _exit() (see exit(2)) or
27                             exit(3C), or the value  that  the  child  process
28                             returned from main.
29
30
31       WIFCONTINUED(stat)    Evaluates  to  a  non-zero  value  if  status was
32                             returned for a child process that has continued.
33
34
35       WIFEXITED(stat)       Evaluates to  a  non-zero  value  if  status  was
36                             returned for a child process that terminated nor‐
37                             mally.
38
39
40       WIFSIGNALED(stat)     Evaluates to  a  non-zero  value  if  status  was
41                             returned  for a child process that terminated due
42                             to the receipt of a signal.
43
44
45       WIFSTOPPED(stat)      Evaluates to  a  non-zero  value  if  status  was
46                             returned  for  a  child process that is currently
47                             stopped.
48
49
50       WSTOPSIG(stat)        If the value  of  WIFSTOPPED(stat)  is  non-zero,
51                             this  macro evaluates to the number of the signal
52                             that caused the child process to stop.
53
54
55       WTERMSIG(stat)        If the value of  WIFSIGNALED(stat)  is  non-zero,
56                             this  macro evaluates to the number of the signal
57                             that caused the termination of the child process.
58
59
60
61       The <sys/wait.h> header defines the symbolic constants listed below for
62       use with waitpid(3C).
63
64       WNOHANG      Do not hang if no status is available; return immediately.
65
66
67       WUNTRACED    Report status of stopped child process.
68
69
70
71       The  symbolic constants listed below are defined as possible values for
72       the options argument to waitid(2).
73
74       WEXITED       Wait for processes that have exited.
75
76
77       WSTOPPED      Status is returned for any child that  has  stopped  upon
78                     receipt of a signal.
79
80
81       WCONTINUED    Status is returned for any child that was stopped and has
82                     been continued.
83
84
85       WNOHANG       Return immediately if there are no children to wait for.
86
87
88       WNOWAIT       Keep the process whose status is returned in infop  in  a
89                     waitable state.
90
91
92
93       The type idtype_t is defined as an enumeration type whose possible val‐
94       ues include the following:
95
96         P_ALL
97         P_PID
98         P_PGID
99
100
101
102       The id_t and pid_t types are defined as described in <sys/types.h>.
103
104
105       The siginfo_t type is defined as described in <signal.h>.
106
107
108       The rusage structure is defined as described in <sys/resource.h>.
109
110
111       Inclusion of the <sys/wait.h> header can also make visible all  symbols
112       from <signal.h> and <sys/resource.h>.
113

ATTRIBUTES

115       See attributes(5) for descriptions of the following attributes:
116
117
118
119
120       ┌─────────────────────────────┬─────────────────────────────┐
121       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
122       ├─────────────────────────────┼─────────────────────────────┤
123       │Interface Stability          │Standard                     │
124       └─────────────────────────────┴─────────────────────────────┘
125

NAME

SYNOPSIS

DESCRIPTION

ATTRIBUTES

SEE ALSO