/[cvs]/joko/Uni/BSArch/03/win32/min_shell.c
ViewVC logotype

Diff of /joko/Uni/BSArch/03/win32/min_shell.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.11 by joko, Fri Jun 16 00:31:50 2006 UTC revision 1.16 by joko, Fri Jun 16 20:32:37 2006 UTC
# Line 11  int main(int argc, char * argv[]) { Line 11  int main(int argc, char * argv[]) {
11        
12    // interactive mode with prompt    // interactive mode with prompt
13    if (argc == 1) {    if (argc == 1) {
14      fprintf(stderr, "Interactive mode not implemented yet.\n");      fprintf(stderr, "Welcome to mini shell. Have fun!\n");
15      //printf("No arguments given.");      run_commands(stdin, "> ");
     exit(EXIT_FAILURE);  
   }  
16        
17    // scripting mode    // scripting mode
18    if (argc == 2) {    } else if (argc == 2) {
19      FILE * script = fopen(argv[1], "r");      FILE * script;
20      run_commands(script);      script = fopen(argv[1], "r");
21        if (script == NULL) {
22          perror(NULL);
23          exit(EXIT_FAILURE);
24        }
25        run_commands(script, "");
26      fclose(script);      fclose(script);
27      
28      } else {
29        fprintf(stderr, "Sorry, mini shell just accepts one parameter: a path to a script!\n");
30    }    }
31  }  }
32    
33  void run_commands(FILE * fp) {  void run_commands(FILE * fp, char * prompt) {
34        
35    char command[MAX_COMMAND_LENGTH];    char command[MAX_COMMAND_LENGTH];
36      char *command_ptr;
37        
38      // echo first prompt
39      fprintf(stdout, "%s", prompt);
40    while (fgets(command, MAX_COMMAND_LENGTH, fp)) {    while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
41      int command_length;      
42        int error_number = ferror(fp);
43        
44        if (error_number) {
45          char * message = strerror(error_number);
46          fprintf(stderr, "Error while reading from input stream: %s", message);
47          clearerr(fp);
48          break;
49        }
50        
51        command_ptr = command;
52            
53      // strip newlines      // strip newlines
54      chomp(command);      chomp(command_ptr);
55        
56        // trim whitespace
57        trim(&command_ptr);
58            
59      // ... and action      // ... and action
60      dispatch_command(command);      if (strlen(command_ptr))
61          dispatch_command(command_ptr);
62        
63        // echo prompt after executing shell command
64        fprintf(stdout, "%s", prompt);
65    }    }
66        
67  }  }
# Line 76  void dispatch_command(char * command) { Line 102  void dispatch_command(char * command) {
102    } else {    } else {
103      //printf("running: %s\n", command);      //printf("running: %s\n", command);
104      command_length = strlen(command);      command_length = strlen(command);
105      if (command[command_length-1] == '&') {      if (command[command_length-1] == '&' && command[command_length-2] == ' ') {
106        command[command_length-1] = '\0';        command[command_length-1] = '\0';
107          command[command_length-2] = '\0';
108        background = TRUE;        background = TRUE;
109      }      }
110            
Legend:
Removed from v.1.11  
changed lines
  Added in v.1.16
MailToCvsAdmin">MailToCvsAdmin
 ViewVC Help
Powered by ViewVC 1.1.26 RSS 2.0 feed