03/win32/min_shell.c

/* $Id: min_shell.c,v 1.11 2006/06/16 00:31:50 joko Exp $ */

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

#include "min_shell.h"

int main(int argc, char * argv[]) {
  
  // interactive mode with prompt
  if (argc == 1) {
    //fprintf(stderr, "Interactive mode not implemented yet.\n");
    //exit(EXIT_FAILURE);
    run_commands(stdin, "> ");
  }
  
  // scripting mode
  if (argc == 2) {
    FILE * script = fopen(argv[1], "r");
    run_commands(script, "");
    fclose(script);
  }
}

void run_commands(FILE * fp, char * prompt) {
  
  char command[MAX_COMMAND_LENGTH];
  
  // echo first prompt
  fprintf(stdout, "%s", prompt);
  while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
    int command_length;
    
    // strip newlines
    chomp(command);
    
    // ... and action
    dispatch_command(command);
    
    // echo prompt after executing shell command
    fprintf(stdout, "%s", prompt);
  }
  
}


void dispatch_command(char * command) {

  BOOL background = FALSE;
  int command_length;
  char first_char;
  char * shell_command;

  // is it a shell command?
  first_char = command[0];
  if (strcmp(&first_char, ":") == 0) {
    
    // "calculate" shell command ...
    shell_command = command + 1;
    //printf("shell command: %s\n", shell_command);
    
    // ... and dispatch it
    
    // wait
    if (strcmp(shell_command, "wait") == 0) {
      // TODO
      os_wait_for_processes();
    
    // exit
    } else if (strcmp(shell_command, "exit") == 0) {
      exit(EXIT_SUCCESS);
    
    // unknown command
    } else {
      fprintf(stderr, "ERROR: Unknown shell command '%s'\n", shell_command);
    }
  
  // run program: background or foreground?
  } else {
    //printf("running: %s\n", command);
    command_length = strlen(command);
    if (command[command_length-1] == '&') {
      command[command_length-1] = '\0';
      background = TRUE;
    }
    
    os_start_process(command, background);
  }
}

1	joko	1.12	/* $Id: min_shell.c,v 1.11 2006/06/16 00:31:50 joko Exp $ */
2	joko	1.1
3			#include <stdlib.h>
4	joko	1.3	#include <stdio.h>
5	joko	1.1	#include <errno.h>
6	joko	1.10	#include <string.h>
7	joko	1.2
8	joko	1.4	#include "min_shell.h"
9
10	joko	1.1	int main(int argc, char * argv[]) {
11	joko	1.8
12			// interactive mode with prompt
13	joko	1.1	if (argc == 1) {
14	joko	1.12	//fprintf(stderr, "Interactive mode not implemented yet.\n");
15			//exit(EXIT_FAILURE);
16			run_commands(stdin, "> ");
17	joko	1.1	}
18	joko	1.4
19	joko	1.8	// scripting mode
20	joko	1.4	if (argc == 2) {
21			FILE * script = fopen(argv[1], "r");
22	joko	1.12	run_commands(script, "");
23	joko	1.4	fclose(script);
24			}
25	joko	1.1	}
26	joko	1.2
27	joko	1.12	void run_commands(FILE * fp, char * prompt) {
28	joko	1.4
29			char command[MAX_COMMAND_LENGTH];
30
31	joko	1.12	// echo first prompt
32			fprintf(stdout, "%s", prompt);
33	joko	1.8	while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
34	joko	1.9	int command_length;
35
36			// strip newlines
37	joko	1.8	chomp(command);
38	joko	1.9
39			// ... and action
40	joko	1.10	dispatch_command(command);
41	joko	1.12
42			// echo prompt after executing shell command
43			fprintf(stdout, "%s", prompt);
44	joko	1.8	}
45	joko	1.4
46	joko	1.6	}
47
48	joko	1.4
49	joko	1.10	void dispatch_command(char * command) {
50	joko	1.9
51			BOOL background = FALSE;
52			int command_length;
53	joko	1.10	char first_char;
54			char * shell_command;
55	joko	1.9
56	joko	1.10	// 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	joko	1.11	//printf("shell command: %s\n", shell_command);
63	joko	1.10
64			// ... and dispatch it
65
66			// wait
67			if (strcmp(shell_command, "wait") == 0) {
68			// TODO
69	joko	1.11	os_wait_for_processes();
70	joko	1.10
71			// exit
72			} else if (strcmp(shell_command, "exit") == 0) {
73			exit(EXIT_SUCCESS);
74
75			// unknown command
76			} else {
77			fprintf(stderr, "ERROR: Unknown shell command '%s'\n", shell_command);
78			}
79
80			// run program: background or foreground?
81			} else {
82	joko	1.11	//printf("running: %s\n", command);
83	joko	1.10	command_length = strlen(command);
84			if (command[command_length-1] == '&') {
85			command[command_length-1] = '\0';
86			background = TRUE;
87			}
88
89			os_start_process(command, background);
90	joko	1.9	}
91	joko	1.3	}
92
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26