/[cvs]/joko/Uni/BSArch/03/win32/min_shell.c
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Diff of /joko/Uni/BSArch/03/win32/min_shell.c

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revision 1.4 by joko, Thu Jun 15 14:21:16 2006 UTC revision 1.10 by joko, Fri Jun 16 00:06:11 2006 UTC
# Line 3  Line 3 
3  #include <stdlib.h>  #include <stdlib.h>
4  #include <stdio.h>  #include <stdio.h>
5  #include <errno.h>  #include <errno.h>
6  #include <windows.h>  #include <string.h>
7    
8  #include "min_shell.h"  #include "min_shell.h"
9    
 #define BOOL int  
 #define TRUE 1  
 #define FALSE 0  
   
10    
11  #define MAX_COMMAND_LENGTH 1024  #define MAX_COMMAND_LENGTH 1024
12    
13  int main(int argc, char * argv[]) {  int main(int argc, char * argv[]) {
14      
15      // interactive mode with prompt
16    if (argc == 1) {    if (argc == 1) {
17      //printf("No arguments given.");      //printf("No arguments given.");
18      //exit(EXIT_FAILURE);      //exit(EXIT_FAILURE);
19      char filename[255] = "abc\0";      char filename[255] = "abc\0";
20      BOOL background = 0;      BOOL background = 0;
21      start_process(filename, background);      os_start_process(filename, background);
22    }    }
23        
24      // scripting mode
25    if (argc == 2) {    if (argc == 2) {
26      FILE * script = fopen(argv[1], "r");      FILE * script = fopen(argv[1], "r");
27      read_commands(script);      run_commands(script);
28      fclose(script);      fclose(script);
29    }    }
30  }  }
31    
32  void read_commands(FILE * fp) {  void run_commands(FILE * fp) {
33        
34    char command[MAX_COMMAND_LENGTH];    char command[MAX_COMMAND_LENGTH];
   int command_length;  
     
   fgets(command, MAX_COMMAND_LENGTH, fp);  
   command_length = strlen(command);  
35        
36    /* if last char is newline, strip it */    while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
37    if (command[command_length-1] == '\n') {      int command_length;
38      command[command_length-1] = '\0';      
39        // strip newlines
40        chomp(command);
41        
42        // ... and action
43        dispatch_command(command);
44    }    }
45        
   process_command(command);  
46  }  }
47    
 void process_command(char * command) {  
   printf("process_command: %s\n", command);  
   start_process(command, 0);  
 }  
48    
49  BOOL start_process(char * filename, BOOL background) {  void dispatch_command(char * command) {
50    
51    STARTUPINFO si;    BOOL background = FALSE;
52    PROCESS_INFORMATION pi;    int command_length;
53      char first_char;
54      char * shell_command;
55    
56    printf("start_process: '%s'\n", filename);    // is it a shell command?
57      first_char = command[0];
58      if (strcmp(&first_char, ":") == 0) {
59        
60        // "calculate" shell command ...
61        shell_command = command + 1;
62        printf("shell command: %s\n", shell_command);
63        
64        // ... and dispatch it
65        
66        // wait
67        if (strcmp(shell_command, "wait") == 0) {
68          // TODO
69        
70        // exit
71        } else if (strcmp(shell_command, "exit") == 0) {
72          exit(EXIT_SUCCESS);
73        
74        // unknown command
75        } else {
76          fprintf(stderr, "ERROR: Unknown shell command '%s'\n", shell_command);
77        }
78        
79    ZeroMemory(&si,sizeof(si));    // run program: background or foreground?
80    si.cb = sizeof(STARTUPINFO);    } else {
81          printf("running: %s\n", command);
82    ZeroMemory(&pi,sizeof(pi));      command_length = strlen(command);
83    //pi.cb=sizeof(PROCESS_INFORMATION);      if (command[command_length-1] == '&') {
84            command[command_length-1] = '\0';
85    CreateProcess(        background = TRUE;
     //"C:\windows\system32\notepad.exe", NULL,  
     //"C:\\windows\\system32\\notepad.exe", NULL,  
     NULL, filename,  
     NULL, NULL, FALSE, 0,  
     NULL, NULL,  
     &si,  
     &pi  
   );  
   check_alert_error("CreateProcess");  
     
   if (!background) {  
     long status;  
     status = WaitForSingleObject(pi.hProcess, INFINITE);  
     if (status == WAIT_FAILED) {  
       check_alert_error("WaitForSingleObject");  
       return FALSE;  
86      }      }
87        
88        os_start_process(command, background);
89    }    }
     
   return TRUE;  
   
90  }  }
91    
 void check_alert_error(const char * error_source) {  
   DWORD dwError = GetLastError();  
   
   HLOCAL message = NULL;  
   BOOL fOk;  
     
   if (dwError == 0)  
     return;  
   
   fOk = FormatMessage(  
     FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,  
     NULL,  
     dwError,  
     MAKELANGID(LANG_NEUTRAL, SUBLANG_SYS_DEFAULT),  
     (PTSTR)&message,  
     0,  
     NULL  
   );  
   
   if (message != NULL) {  
     fprintf(stderr, "Error with '%s': %s (Code %i)\n", error_source, message, dwError);  
     LocalFree(message);  
   }  
     
 }  
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