Michael Shimniok / SimpleShell

Simple embedded shell with runtime pluggable commands.

Dependents:   DataBus2018

Implements a simple unix-like shell for embedded systems with a pluggable command architecture.

SimpleShell.cpp@3:ebb4893f033d, 2018-12-02 (annotated)

Committer:
shimniok
Date:
Sun Dec 02 17:14:28 2018 +0000
Revision:
3:ebb4893f033d
Parent:
2:4f0affdb7db9
Child:
4:8b8fa59d0015
Stubbed command lookup

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shimniok 0:49820d5a38c9 1 #include "SimpleShell.h"
shimniok 0:49820d5a38c9 2
shimniok 0:49820d5a38c9 3 SimpleShell::SimpleShell()
shimniok 0:49820d5a38c9 4 {
shimniok 2:4f0affdb7db9 5 lookupEnd = 0;
shimniok 0:49820d5a38c9 6 }
shimniok 0:49820d5a38c9 7
shimniok 0:49820d5a38c9 8 void SimpleShell::run()
shimniok 0:49820d5a38c9 9 {
shimniok 0:49820d5a38c9 10 bool done=false;
shimniok 0:49820d5a38c9 11 strcpy(_cwd, "/log");
shimniok 0:49820d5a38c9 12
shimniok 0:49820d5a38c9 13 printf("Type help for assistance.\n");
shimniok 0:49820d5a38c9 14 while (!done) {
shimniok 0:49820d5a38c9 15 printPrompt();
shimniok 0:49820d5a38c9 16 readCommand();
shimniok 3:ebb4893f033d 17 //cb = findCommand();
shimniok 3:ebb4893f033d 18 //if cb
shimniok 3:ebb4893f033d 19 // status = cb.call();
shimniok 3:ebb4893f033d 20 // done = status == EXIT
shimniok 3:ebb4893f033d 21 //else error not found
shimniok 0:49820d5a38c9 22 }
shimniok 0:49820d5a38c9 23 puts("exiting shell\n");
shimniok 0:49820d5a38c9 24
shimniok 0:49820d5a38c9 25 return;
shimniok 0:49820d5a38c9 26 }
shimniok 0:49820d5a38c9 27
shimniok 0:49820d5a38c9 28
shimniok 2:4f0affdb7db9 29 void SimpleShell::attach(Callback<void()> cb, char *command)
shimniok 2:4f0affdb7db9 30 {
shimniok 2:4f0affdb7db9 31 if (lookupEnd < MAXLOOKUP) {
shimniok 2:4f0affdb7db9 32 lookup[lookupEnd].cb = cb;
shimniok 2:4f0affdb7db9 33 lookup[lookupEnd].command = command;
shimniok 2:4f0affdb7db9 34 lookupEnd++;
shimniok 2:4f0affdb7db9 35 }
shimniok 2:4f0affdb7db9 36
shimniok 2:4f0affdb7db9 37 for (int i=0; i < lookupEnd; i++) {
shimniok 2:4f0affdb7db9 38 printf("%s\n", lookup[i].command);
shimniok 2:4f0affdb7db9 39 }
shimniok 2:4f0affdb7db9 40
shimniok 2:4f0affdb7db9 41 return;
shimniok 1:998a7ed04f10 42 }
shimniok 1:998a7ed04f10 43
shimniok 1:998a7ed04f10 44
shimniok 3:ebb4893f033d 45 Callback<void()> SimpleShell::findCommand()
shimniok 3:ebb4893f033d 46 {
shimniok 3:ebb4893f033d 47 Callback<void()> cb=NULL;
shimniok 3:ebb4893f033d 48
shimniok 3:ebb4893f033d 49 return cb;
shimniok 3:ebb4893f033d 50 }
shimniok 3:ebb4893f033d 51
shimniok 3:ebb4893f033d 52
shimniok 0:49820d5a38c9 53 void SimpleShell::printPrompt()
shimniok 0:49820d5a38c9 54 {
shimniok 0:49820d5a38c9 55 fputc('(', stdout);
shimniok 0:49820d5a38c9 56 fputs(_cwd, stdout);
shimniok 0:49820d5a38c9 57 fputs(")# ", stdout);
shimniok 2:4f0affdb7db9 58
shimniok 2:4f0affdb7db9 59 return;
shimniok 0:49820d5a38c9 60 }
shimniok 0:49820d5a38c9 61
shimniok 0:49820d5a38c9 62
shimniok 0:49820d5a38c9 63 void SimpleShell::readCommand()
shimniok 0:49820d5a38c9 64 {
shimniok 0:49820d5a38c9 65 int i=0;
shimniok 0:49820d5a38c9 66 char c;
shimniok 0:49820d5a38c9 67 bool done = false;
shimniok 0:49820d5a38c9 68
shimniok 0:49820d5a38c9 69 memset(cmd, 0, MAXBUF);
shimniok 0:49820d5a38c9 70 do {
shimniok 0:49820d5a38c9 71 cmd[i] = 0;
shimniok 0:49820d5a38c9 72 c = fgetc(stdin);
shimniok 0:49820d5a38c9 73 if (c == '\r') { // if return is hit, we're done, don't add \r to cmd
shimniok 0:49820d5a38c9 74 done = true;
shimniok 0:49820d5a38c9 75 } else if (i < MAXBUF-1) {
shimniok 0:49820d5a38c9 76 if (c == 0x7f || c == '\b') { // backspace or delete
shimniok 0:49820d5a38c9 77 if (i > 0) { // if we're at the beginning, do nothing
shimniok 0:49820d5a38c9 78 i--;
shimniok 0:49820d5a38c9 79 fputs("\b \b", stdout);
shimniok 0:49820d5a38c9 80
shimniok 0:49820d5a38c9 81 }
shimniok 0:49820d5a38c9 82 } else {
shimniok 0:49820d5a38c9 83 fputc(c, stdout);
shimniok 0:49820d5a38c9 84 cmd[i++] = c;
shimniok 0:49820d5a38c9 85 }
shimniok 0:49820d5a38c9 86 }
shimniok 0:49820d5a38c9 87 } while (!done);
shimniok 0:49820d5a38c9 88 fputc('\n', stdout);
shimniok 0:49820d5a38c9 89
shimniok 2:4f0affdb7db9 90 return;
shimniok 0:49820d5a38c9 91 }