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/*-------------------------------------------------------------------------
*
* do_shell.h
*
* Shell control module of Postgres-XC configuration and operation tool.
*
* Copyright (c) 2013 Postgres-XC Development Group
*
*-------------------------------------------------------------------------
*/
#ifndef DO_SHELL_H
#define DO_SHELL_H
#include <setjmp.h>
extern jmp_buf *whereToJumpMainLoop;
extern jmp_buf dcJmpBufMainLoop;
extern void dcSigHandler(int signum);
typedef enum FileType { STDIN, STDOUT, STDERR, GENERAL } FileType;
#ifndef PGSIGFUNC
#define PGSIGFUNC
typedef void (*pqsigfunc) (int signo);
#endif
extern char *createLocalFileName(FileType type, char *buf, int len);
extern char *createRemoteFileName(FileType type, char *buf, int len);
extern int doImmediate(char *host, char *stdIn, const char *cmd_fmt, ...) __attribute__((format(printf, 3, 4)));
extern int doImmediateRaw(const char *cmd_fmt, ...) __attribute__((format(printf, 1,2)));
extern FILE *pgxc_popen_wRaw(const char *cmd_fmt, ...) __attribute__((format(printf, 1,2)));
extern FILE *pgxc_popen_w(char *host, const char *cmd_fmt, ...) __attribute__((format(printf, 2,3)));
/*
* Flags
*/
#define PrintLog 0x01
#define PrintErr 0x02
#define LogOnly PrintLog
#define ErrOnly PrintErr
#define LogErr (PrintLog | PrintErr)
#define LeaveRemoteStdin 0x04
#define LeaveLocalStdin 0x08
#define LeaveStdout 0x10
#define InternalFunc(cmd, func, parm) \
do \
{(cmd)->isInternal = TRUE; (cmd)->callback = (func); (cmd)->callback_parm = (parm);} \
while(0)
#define ShellCall(cmd) \
do \
{(cmd)->isInternal = FALSE; (cmd)->callback = NULL; (cmd)->callback_parm = NULL;} \
while(0)
typedef struct cmd_t
{
struct cmd_t *next; /* Next to do --> done in the same shell */
int isInternal; /* If true, do not invoke shell. Call internal function */
void (*callback)(char *line); /* Callback function */
char *callback_parm;/* Argument to the callback function. Will be freed here. */
char *host; /* target host -> If null, then local command */
char *command; /* Will be double-quoted. Double-quote has to be escaped by the caller */
char *localStdin; /* Local stdin name --> Supplied by the caller. */
char *actualCmd; /* internal use --> local ssh full command. */
char *localStdout; /* internal use, local stdout name --> Generated. Stderr will be copied here too */
/* Messages from the child process may be printed to this file too. */
pid_t pid; /* internal use: valid only for cmd at the head of the list */
int flag; /* flags */
int excode; /* exit code -> not used in parallel execution. */
char *msg; /* internal use: messages to write. Has to be comsumed only by child process. */
char *remoteStdout; /* internal use: remote stdout name. Generated for remote case */
} cmd_t;
typedef struct cmdList_t
{
int allocated;
int used;
cmd_t **cmds;
} cmdList_t;
extern cmdList_t *initCmdList(void);
extern cmd_t *initCmd(char *host);
#define newCommand(a) ((a)->command=Malloc(sizeof(char) * (MAXLINE+1)))
#define newCmd(a) ((a)=initCmd())
#define newFilename(a) ((a)=Malloc(sizeof(char) *(MAXPATH+1)))
/*
* Return valie from doCmd() and doCmdList(): This include
* exit code from the shell (and their command), as well as
* other status of the code.
*
* Exit status should include WIFSIGNALED() and their signal information,
* as well as other seen in wait(2). Such information should be composed
* using individual command status. Because functions to compose them is
* not available, we provide corresponding local implementation for them.
*/
extern int doCmdEl(cmd_t *cmd);
extern int doCmd(cmd_t *cmd);
extern int doCmdList(cmdList_t *cmds);
extern void do_cleanCmdList(cmdList_t *cmds);
#define cleanCmdList(x) do{do_cleanCmdList(x); (x) = NULL;}while(0)
extern void do_cleanCmd(cmd_t *cmd);
#define cleanCmd(x) do{do_cleanCmd(x); (x) = NULL;}while(0)
extern void do_cleanCmdEl(cmd_t *cmd);
#define cleanCmdEl(x) do{do_cleanCmeEl(x); (x) = NULL;}while(0)
extern void addCmd(cmdList_t *cmdList, cmd_t *cmd);
extern void appendCmdEl(cmd_t *src, cmd_t *new);
extern void cleanLastCmd(cmdList_t *cmdList);
extern cmd_t *makeConfigBackupCmd(void);
extern int doConfigBackup(void);
extern void dump_cmdList(cmdList_t *cmdList);
#endif /* DO_SHELL_H */
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