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/*
** Copyright (c) 2016 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)
** This program is distributed in the hope that it will be useful,
** but without any warranty; without even the implied warranty of
** merchantability or fitness for a particular purpose.
**
** Author contact information:
** drh@hwaci.com
** http://www.hwaci.com/drh/
**
*******************************************************************************
**
** This module contains the code that implements the "fossil shell" command.
**
** The fossil shell prompts for lines of user input, then parses each line
** after the fashion of a standard Bourne shell and forks a child process
** to run the corresponding Fossil command. This only works on Unix.
**
** The "fossil shell" command is intended for use with SEE-enabled fossil.
** It allows multiple commands to be issued without having to reenter the
** crypto passphrase for each command.
*/
#include "config.h"
#include "fshell.h"
#include <ctype.h>
#ifndef _WIN32
# include "linenoise.h"
# include <sys/types.h>
# include <sys/wait.h>
#endif
/*
** COMMAND: shell*
**
** Usage: %fossil shell
**
** Prompt for lines of input from stdin. Parse each line and evaluate
** it as a separate fossil command, in a child process. The initial
** "fossil" is omitted from each line.
**
** This command only works on unix-like platforms that support fork().
** It is non-functional on Windows.
*/
void shell_cmd(void){
#ifdef _WIN32
fossil_fatal("the 'shell' command is not supported on windows");
#else
int nArg;
int mxArg = 0;
int n, i;
char **azArg = 0;
int fDebug;
pid_t childPid;
char *zLine = 0;
char *zPrompt = 0;
fDebug = find_option("debug", 0, 0)!=0;
db_find_and_open_repository(OPEN_ANY_SCHEMA|OPEN_OK_NOT_FOUND, 0);
if(g.zRepositoryName!=0){
zPrompt = mprintf("fossil (%z)> ", db_get("project-name","unnamed"));
}else{
zPrompt = mprintf("fossil (no repo)> ");
}
db_close(0);
sqlite3_shutdown();
linenoiseSetMultiLine(1);
while( (free(zLine), zLine = linenoise(zPrompt)) ){
/* Remember shell history within the current session */
linenoiseHistoryAdd(zLine);
/* Parse the line of input */
n = (int)strlen(zLine);
for(i=0, nArg=1; i<n; i++){
while( fossil_isspace(zLine[i]) ){ i++; }
if( i>=n ) break;
if( nArg>=mxArg ){
mxArg = nArg+10;
azArg = fossil_realloc(azArg, sizeof(char*)*mxArg);
if( nArg==1 ) azArg[0] = g.argv[0];
}
if( zLine[i]=='"' || zLine[i]=='\'' ){
char cQuote = zLine[i];
i++;
azArg[nArg++] = &zLine[i];
for(i++; i<n && zLine[i]!=cQuote; i++){}
}else{
azArg[nArg++] = &zLine[i];
while( i<n && !fossil_isspace(zLine[i]) ){ i++; }
}
zLine[i] = 0;
}
/* If the --debug flag was used, display the parsed arguments */
if( fDebug ){
for(i=1; i<nArg; i++){
fossil_print("argv[%d] = [%s]\n", i, azArg[i]);
}
}
/* Special cases */
if( nArg<2 ) continue;
if( fossil_strcmp(azArg[1],"exit")==0 ) break;
/* Fork a process to handle the command */
childPid = fork();
if( childPid<0 ){
printf("could not fork a child process to handle the command\n");
fflush(stdout);
continue;
}
if( childPid==0 ){
/* This is the child process */
int main(int, char**);
fossil_main(nArg, azArg);
exit(0);
}else{
/* The parent process */
int status;
waitpid(childPid, &status, 0);
}
}
free(zPrompt);
#endif
}
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