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Update bbox_lib.cpp

This commit is contained in:
Eao3piq4e 2022-08-02 20:50:21 +08:00
parent cf8e1541b1
commit 14c4068daa
1 changed files with 30 additions and 7 deletions
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37
src/gausskernel/cbb/bbox/bbox_lib.cpp
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@ -347,9 +347,6 @@ void bbox_PutPid(struct PIPE_ID* pstPid)
securec_check_c(rc, "\0", "\0");
}
/*
* find available pipe id by file handle
*/
/*
function name: bbox_FindPid
description: In all occupied pipes, the function search the flag pipe through compare all structure
@ -379,8 +376,17 @@ struct PIPE_ID* bbox_FindPid(int iFd)
}
/*
* run popen
*/
function name: sys_popen
description: The function gets a free pipe by function bbox_GetFreePid, if normally, then creat a pipe
through sys_pipe, andcreat a child process through function sys_fork, execute a shell command
to run a process.
arguments: One pointer to a string that represents command line, another pointer of type const char*
indicates that the file file handle directs is used in the this mode.
return value: A pointer of type struct PIPE_ID* or NULL.
note: The string that indicates pszMode should only be "r" or "w",
date: 2022/8/2
contact tel: same
*/
s32 sys_popen(char* pszCmd, const char* pszMode)
{
struct PIPE_ID* volatile stCurPid = NULL;
@ -485,8 +491,15 @@ s32 sys_popen(char* pszCmd, const char* pszMode)
}
/*
* close file handle
*/
function name: sys_pclose
description: The function has an contrary action to function sys_popen, it close the pipe
that sys_popen open.
arguments: iFd, an integer that indicates a file handle.
return value: An integer that indicates the final status of the process working before.
note: none
date: 2022/8/2
contact tel: same
*/
int sys_pclose(s32 iFd)
{
struct PIPE_ID* pstCur = NULL;
@ -511,6 +524,16 @@ int sys_pclose(s32 iFd)
/*
* list file in directory
*/
/*
function name: bbox_listdir
description: The function has an contrary action to function sys_popen, it close the pipe
that sys_popen open.
arguments: iFd, an integer that indicates a file handle.
return value: An integer that indicates the final status of the process working before.
note: none
date: 2022/8/2
contact tel: same
*/
s32 bbox_listdir(const char* pstPath, BBOX_LIST_DIR_CALLBACK callback, void* pArgs)
{
struct linux_dirent* pstEntry = NULL;