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/* $Id: min_shell.c,v 1.4 2006/06/15 14:21:16 joko Exp $ */ |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <errno.h> |
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#include <windows.h> |
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#include "min_shell.h" |
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#define BOOL int |
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#define TRUE 1 |
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#define FALSE 0 |
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#define MAX_COMMAND_LENGTH 1024 |
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int main(int argc, char * argv[]) { |
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if (argc == 1) { |
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1.2 |
//printf("No arguments given."); |
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//exit(EXIT_FAILURE); |
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char filename[255] = "abc\0"; |
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BOOL background = 0; |
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start_process(filename, background); |
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} |
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if (argc == 2) { |
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FILE * script = fopen(argv[1], "r"); |
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read_commands(script); |
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fclose(script); |
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} |
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1.1 |
} |
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1.2 |
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1.4 |
void read_commands(FILE * fp) { |
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char command[MAX_COMMAND_LENGTH]; |
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int command_length; |
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fgets(command, MAX_COMMAND_LENGTH, fp); |
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command_length = strlen(command); |
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/* if last char is newline, strip it */ |
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if (command[command_length-1] == '\n') { |
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command[command_length-1] = '\0'; |
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} |
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1.2 |
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1.4 |
process_command(command); |
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} |
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void process_command(char * command) { |
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printf("process_command: %s\n", command); |
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start_process(command, 0); |
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} |
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BOOL start_process(char * filename, BOOL background) { |
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STARTUPINFO si; |
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PROCESS_INFORMATION pi; |
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//printf("start_process: '%s'\n", filename); |
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ZeroMemory(&si,sizeof(si)); |
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si.cb = sizeof(STARTUPINFO); |
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ZeroMemory(&pi,sizeof(pi)); |
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CreateProcess( |
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NULL, filename, |
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NULL, NULL, FALSE, 0, |
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NULL, NULL, |
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&si, |
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&pi |
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); |
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check_alert_error("CreateProcess"); |
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if (!background) { |
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long status; |
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status = WaitForSingleObject(pi.hProcess, INFINITE); |
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if (status == WAIT_FAILED) { |
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check_alert_error("WaitForSingleObject"); |
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1.4 |
return FALSE; |
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1.3 |
} |
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} |
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1.4 |
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return TRUE; |
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1.3 |
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} |
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void check_alert_error(const char * error_source) { |
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DWORD dwError = GetLastError(); |
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HLOCAL message = NULL; |
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BOOL fOk; |
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if (dwError == 0) |
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return; |
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fOk = FormatMessage( |
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FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, |
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NULL, |
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dwError, |
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MAKELANGID(LANG_NEUTRAL, SUBLANG_SYS_DEFAULT), |
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1.4 |
(PTSTR)&message, |
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1.3 |
0, |
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NULL |
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); |
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if (message != NULL) { |
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fprintf(stderr, "Error with '%s': %s (Code %i)\n", error_source, message, dwError); |
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LocalFree(message); |
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1.3 |
} |
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1.2 |
} |