Welcome to little lamb

Code » limb » master » tree

[master] / src / doc / term.h / term_ensurefg.3.md 

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
% limb manual
% term_ensurefg(3)
% limb 0.1.0
% 2023-07-24

# NAME

term\_ensurefg - ensure current process is in the foreground job if needed

# SYNOPSIS

    #include <limb/term.h>

```pre hl
int term_ensurefg(int <em>fd</em>)
```

# DESCRIPTION

The `term_ensurefg`() function will make sure the current process is in the
foreground process group of its controlling terminal, which must be referred to
by `fd`.

! NOTE:
! To do so, the *SIGTTOU* signal will be ignored during the execution of the
! function (so it doesn't get send and blocks the process whilst setting the
! terminal foreground process group) then restored to its original handling
! state.

# RETURN VALUE

The `term_ensurefg`() function returns 1 on success, otherwise it returns 0 and
sets `errno` to indicate the error.

# ERRORS

The `term_ensurefg`() function may fail and set `errno` for any of the errors
described for [tcsetpgrp](3) except *EINVAL* and *EPERM*.