03/win32/min_shell.c

/* $Id: min_shell.c,v 1.9 2006/06/15 23:16:01 joko Exp $ */

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

#include "min_shell.h"


#define MAX_COMMAND_LENGTH 1024

int main(int argc, char * argv[]) {
  
  // interactive mode with prompt
  if (argc == 1) {
    //printf("No arguments given.");
    //exit(EXIT_FAILURE);
    char filename[255] = "abc\0";
    BOOL background = 0;
    os_start_process(filename, background);
  }
  
  // scripting mode
  if (argc == 2) {
    FILE * script = fopen(argv[1], "r");
    run_commands(script);
    fclose(script);
  }
}

void run_commands(FILE * fp) {
  
  char command[MAX_COMMAND_LENGTH];
  
  while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
    int command_length;
    
    // strip newlines
    chomp(command);
    
    // ... and action
    dispatch_command(command);
  }
  
}


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
    
    // 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	1.10	/* $Id: min_shell.c,v 1.9 2006/06/15 23:16:01 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
11			#define MAX_COMMAND_LENGTH 1024
12
13	joko	1.1	int main(int argc, char * argv[]) {
14	joko	1.8
15			// interactive mode with prompt
16	joko	1.1	if (argc == 1) {
17	joko	1.2	//printf("No arguments given.");
18			//exit(EXIT_FAILURE);
19			char filename[255] = "abc\0";
20			BOOL background = 0;
21	joko	1.7	os_start_process(filename, background);
22	joko	1.1	}
23	joko	1.4
24	joko	1.8	// scripting mode
25	joko	1.4	if (argc == 2) {
26			FILE * script = fopen(argv[1], "r");
27	joko	1.7	run_commands(script);
28	joko	1.4	fclose(script);
29			}
30	joko	1.1	}
31	joko	1.2
32	joko	1.7	void run_commands(FILE * fp) {
33	joko	1.4
34			char command[MAX_COMMAND_LENGTH];
35
36	joko	1.8	while (fgets(command, MAX_COMMAND_LENGTH, fp)) {
37	joko	1.9	int command_length;
38
39			// strip newlines
40	joko	1.8	chomp(command);
41	joko	1.9
42			// ... and action
43	joko	1.10	dispatch_command(command);
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			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			// run program: background or foreground?
80			} else {
81			printf("running: %s\n", command);
82			command_length = strlen(command);
83			if (command[command_length-1] == '&') {
84			command[command_length-1] = '\0';
85			background = TRUE;
86			}
87
88			os_start_process(command, background);
89	joko	1.9	}
90	joko	1.3	}
91
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