Simple embedded shell with runtime pluggable commands.
Implements a simple unix-like shell for embedded systems with a pluggable command architecture.
SimpleShell.cpp@31:27e8130a0d8f, 2018-12-28 (annotated)
- Committer:
- shimniok
- Date:
- Fri Dec 28 17:10:31 2018 +0000
- Revision:
- 31:27e8130a0d8f
- Parent:
- 30:35522ea06236
- Child:
- 32:fc09f0eb1e8a
began wildcard implementation
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
shimniok | 21:5d7ac1f0b842 | 1 | #include "SimpleShell.h" |
shimniok | 21:5d7ac1f0b842 | 2 | #include <ctype.h> |
shimniok | 21:5d7ac1f0b842 | 3 | #include <string> |
shimniok | 28:753db82debb1 | 4 | #include <list> |
shimniok | 21:5d7ac1f0b842 | 5 | |
shimniok | 21:5d7ac1f0b842 | 6 | #define ESC 0x1b |
shimniok | 21:5d7ac1f0b842 | 7 | #define UP 0x41 |
shimniok | 21:5d7ac1f0b842 | 8 | #define DOWN 0x42 |
shimniok | 21:5d7ac1f0b842 | 9 | #define RIGHT 0x43 |
shimniok | 21:5d7ac1f0b842 | 10 | #define LEFT 0x44 |
shimniok | 21:5d7ac1f0b842 | 11 | #define HOME 0x31 |
shimniok | 21:5d7ac1f0b842 | 12 | #define INS 0x32 |
shimniok | 21:5d7ac1f0b842 | 13 | #define DEL 0x33 |
shimniok | 21:5d7ac1f0b842 | 14 | #define PGUP 0x35 |
shimniok | 21:5d7ac1f0b842 | 15 | #define PGDN 0x36 |
shimniok | 21:5d7ac1f0b842 | 16 | #define TAIL 0x7e |
shimniok | 21:5d7ac1f0b842 | 17 | |
shimniok | 21:5d7ac1f0b842 | 18 | |
shimniok | 29:8d4132274445 | 19 | SimpleShell::SimpleShell(char *home) |
shimniok | 28:753db82debb1 | 20 | { |
shimniok | 28:753db82debb1 | 21 | lookupEnd = 0; |
shimniok | 28:753db82debb1 | 22 | |
shimniok | 29:8d4132274445 | 23 | // Set home directory |
shimniok | 29:8d4132274445 | 24 | strncpy(_home, canon(home), MAXBUF); |
shimniok | 29:8d4132274445 | 25 | |
shimniok | 29:8d4132274445 | 26 | // Set current working directory |
shimniok | 29:8d4132274445 | 27 | strncpy(_cwd, _home, MAXBUF); |
shimniok | 29:8d4132274445 | 28 | |
shimniok | 28:753db82debb1 | 29 | // Built-in shell commands |
shimniok | 28:753db82debb1 | 30 | command(callback(this, &SimpleShell::help), "help"); |
shimniok | 28:753db82debb1 | 31 | command(callback(this, &SimpleShell::pwd), "pwd"); |
shimniok | 28:753db82debb1 | 32 | command(callback(this, &SimpleShell::cat), "cat"); |
shimniok | 28:753db82debb1 | 33 | command(callback(this, &SimpleShell::cd), "cd"); |
shimniok | 28:753db82debb1 | 34 | command(callback(this, &SimpleShell::rm), "rm"); |
shimniok | 28:753db82debb1 | 35 | command(callback(this, &SimpleShell::touch), "touch"); |
shimniok | 28:753db82debb1 | 36 | command(callback(this, &SimpleShell::ls), "ls"); |
shimniok | 28:753db82debb1 | 37 | command(callback(this, &SimpleShell::send), "send"); |
shimniok | 28:753db82debb1 | 38 | } |
shimniok | 28:753db82debb1 | 39 | |
shimniok | 28:753db82debb1 | 40 | |
shimniok | 31:27e8130a0d8f | 41 | bool SimpleShell::haswildcard(char *s) { |
shimniok | 31:27e8130a0d8f | 42 | bool result = \ |
shimniok | 31:27e8130a0d8f | 43 | strchr(s, '*') != NULL || strchr(s, '?') != NULL || |
shimniok | 31:27e8130a0d8f | 44 | (strchr(s, '[') != NULL && strchr(s, ']') != NULL); |
shimniok | 31:27e8130a0d8f | 45 | return result; |
shimniok | 31:27e8130a0d8f | 46 | } |
shimniok | 31:27e8130a0d8f | 47 | |
shimniok | 31:27e8130a0d8f | 48 | |
shimniok | 28:753db82debb1 | 49 | /// Path stack representation |
shimniok | 28:753db82debb1 | 50 | typedef std::list<char*> path_t; |
shimniok | 28:753db82debb1 | 51 | |
shimniok | 21:5d7ac1f0b842 | 52 | char *SimpleShell::canon(char *path) { |
shimniok | 28:753db82debb1 | 53 | path_t pstack; |
shimniok | 28:753db82debb1 | 54 | static char tmp[MAXBUF*2]; |
shimniok | 28:753db82debb1 | 55 | char *e; |
shimniok | 21:5d7ac1f0b842 | 56 | |
shimniok | 28:753db82debb1 | 57 | // if we're passed empty/null string, just send back cwd so nothing breaks |
shimniok | 28:753db82debb1 | 58 | if (path == NULL || strlen(path) == 0) { |
shimniok | 28:753db82debb1 | 59 | strcpy(tmp, _cwd); |
shimniok | 28:753db82debb1 | 60 | return tmp; |
shimniok | 28:753db82debb1 | 61 | } |
shimniok | 28:753db82debb1 | 62 | |
shimniok | 28:753db82debb1 | 63 | // relative path? add current working directory to path stack |
shimniok | 21:5d7ac1f0b842 | 64 | if (path[0] != '/') { |
shimniok | 28:753db82debb1 | 65 | strcpy(tmp, _cwd); |
shimniok | 28:753db82debb1 | 66 | strcat(tmp, "/"); |
shimniok | 28:753db82debb1 | 67 | strcat(tmp, path); |
shimniok | 28:753db82debb1 | 68 | } else { |
shimniok | 28:753db82debb1 | 69 | strcpy(tmp, path); |
shimniok | 21:5d7ac1f0b842 | 70 | } |
shimniok | 28:753db82debb1 | 71 | |
shimniok | 28:753db82debb1 | 72 | // now canonicalize the path spec |
shimniok | 28:753db82debb1 | 73 | e = strtok(tmp+1, "/"); |
shimniok | 28:753db82debb1 | 74 | while (e) { |
shimniok | 28:753db82debb1 | 75 | //printf("e = <%s>\n", e); |
shimniok | 28:753db82debb1 | 76 | if (strcmp("..", e) == 0) { |
shimniok | 28:753db82debb1 | 77 | // pop most recent directory |
shimniok | 28:753db82debb1 | 78 | if (!pstack.empty()) |
shimniok | 28:753db82debb1 | 79 | pstack.pop_back(); |
shimniok | 28:753db82debb1 | 80 | } else if (strcmp(".", e) != 0) { |
shimniok | 28:753db82debb1 | 81 | // push this dir onto path |
shimniok | 28:753db82debb1 | 82 | if (strlen(e) > 0) |
shimniok | 28:753db82debb1 | 83 | pstack.push_back(e); |
shimniok | 28:753db82debb1 | 84 | } |
shimniok | 28:753db82debb1 | 85 | e = strtok(NULL, "/"); |
shimniok | 28:753db82debb1 | 86 | } |
shimniok | 21:5d7ac1f0b842 | 87 | |
shimniok | 28:753db82debb1 | 88 | static std::string result; |
shimniok | 28:753db82debb1 | 89 | result = ""; |
shimniok | 28:753db82debb1 | 90 | |
shimniok | 28:753db82debb1 | 91 | for (path_t::iterator it = pstack.begin(); it != pstack.end(); it++) { |
shimniok | 28:753db82debb1 | 92 | result.append("/"); |
shimniok | 28:753db82debb1 | 93 | result.append(*it); |
shimniok | 28:753db82debb1 | 94 | } |
shimniok | 28:753db82debb1 | 95 | |
shimniok | 28:753db82debb1 | 96 | // if empty, add a / |
shimniok | 28:753db82debb1 | 97 | if (result.size() < 2) { |
shimniok | 28:753db82debb1 | 98 | result.append("/"); |
shimniok | 28:753db82debb1 | 99 | } |
shimniok | 28:753db82debb1 | 100 | |
shimniok | 28:753db82debb1 | 101 | strcpy(tmp, result.c_str()); |
shimniok | 28:753db82debb1 | 102 | |
shimniok | 28:753db82debb1 | 103 | return tmp; |
shimniok | 21:5d7ac1f0b842 | 104 | } |
shimniok | 21:5d7ac1f0b842 | 105 | |
shimniok | 21:5d7ac1f0b842 | 106 | |
shimniok | 23:b1e49cfcaef6 | 107 | char *SimpleShell::basename(char *path) { |
shimniok | 24:004e33abce37 | 108 | char *result = path + strlen(path); |
shimniok | 24:004e33abce37 | 109 | |
shimniok | 24:004e33abce37 | 110 | while (result != path) { |
shimniok | 24:004e33abce37 | 111 | if (*result == '/') { |
shimniok | 24:004e33abce37 | 112 | result++; |
shimniok | 24:004e33abce37 | 113 | break; |
shimniok | 24:004e33abce37 | 114 | } |
shimniok | 24:004e33abce37 | 115 | result--; |
shimniok | 24:004e33abce37 | 116 | } |
shimniok | 24:004e33abce37 | 117 | |
shimniok | 24:004e33abce37 | 118 | return result; |
shimniok | 23:b1e49cfcaef6 | 119 | } |
shimniok | 23:b1e49cfcaef6 | 120 | |
shimniok | 23:b1e49cfcaef6 | 121 | |
shimniok | 21:5d7ac1f0b842 | 122 | void SimpleShell::help(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 123 | { |
shimniok | 21:5d7ac1f0b842 | 124 | printf("Available commands: "); |
shimniok | 21:5d7ac1f0b842 | 125 | for (int i=0; i < lookupEnd; i++) { |
shimniok | 21:5d7ac1f0b842 | 126 | printf("%s ", lookup[i].command); |
shimniok | 21:5d7ac1f0b842 | 127 | } |
shimniok | 21:5d7ac1f0b842 | 128 | printf("\n\n"); |
shimniok | 21:5d7ac1f0b842 | 129 | } |
shimniok | 21:5d7ac1f0b842 | 130 | |
shimniok | 21:5d7ac1f0b842 | 131 | |
shimniok | 21:5d7ac1f0b842 | 132 | void SimpleShell::cd(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 133 | { |
shimniok | 29:8d4132274445 | 134 | if (argc == 1) { |
shimniok | 29:8d4132274445 | 135 | strncpy(_cwd, _home, MAXBUF); |
shimniok | 29:8d4132274445 | 136 | } else if (argc == 2) { |
shimniok | 28:753db82debb1 | 137 | strncpy(_cwd, canon(argv[1]), MAXBUF); |
shimniok | 21:5d7ac1f0b842 | 138 | } else { |
shimniok | 21:5d7ac1f0b842 | 139 | puts("usage: cd directory"); |
shimniok | 21:5d7ac1f0b842 | 140 | } |
shimniok | 21:5d7ac1f0b842 | 141 | return; |
shimniok | 21:5d7ac1f0b842 | 142 | } |
shimniok | 21:5d7ac1f0b842 | 143 | |
shimniok | 21:5d7ac1f0b842 | 144 | |
shimniok | 21:5d7ac1f0b842 | 145 | void SimpleShell::pwd(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 146 | { |
shimniok | 21:5d7ac1f0b842 | 147 | puts(_cwd); |
shimniok | 21:5d7ac1f0b842 | 148 | return; |
shimniok | 21:5d7ac1f0b842 | 149 | } |
shimniok | 21:5d7ac1f0b842 | 150 | |
shimniok | 21:5d7ac1f0b842 | 151 | |
shimniok | 21:5d7ac1f0b842 | 152 | void SimpleShell::ls(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 153 | { |
shimniok | 21:5d7ac1f0b842 | 154 | DIR *d; |
shimniok | 21:5d7ac1f0b842 | 155 | struct dirent *p; |
shimniok | 21:5d7ac1f0b842 | 156 | char *path; |
shimniok | 21:5d7ac1f0b842 | 157 | |
shimniok | 21:5d7ac1f0b842 | 158 | if (argc == 1) { |
shimniok | 21:5d7ac1f0b842 | 159 | path = _cwd; |
shimniok | 21:5d7ac1f0b842 | 160 | } else if (argc == 2) { |
shimniok | 28:753db82debb1 | 161 | path = canon(argv[1]); |
shimniok | 21:5d7ac1f0b842 | 162 | } else { |
shimniok | 21:5d7ac1f0b842 | 163 | puts("usage: ls [directory]"); |
shimniok | 21:5d7ac1f0b842 | 164 | return; |
shimniok | 21:5d7ac1f0b842 | 165 | } |
shimniok | 21:5d7ac1f0b842 | 166 | |
shimniok | 21:5d7ac1f0b842 | 167 | int cols=0; |
shimniok | 21:5d7ac1f0b842 | 168 | if ((d = opendir(path)) != NULL) { |
shimniok | 21:5d7ac1f0b842 | 169 | while ((p = readdir(d)) != NULL) { |
shimniok | 21:5d7ac1f0b842 | 170 | if (p->d_name && p->d_name[0] != 0xff) { |
shimniok | 21:5d7ac1f0b842 | 171 | if (cols++ > 3) { |
shimniok | 21:5d7ac1f0b842 | 172 | putc('\n', stdout); |
shimniok | 21:5d7ac1f0b842 | 173 | cols = 0; |
shimniok | 21:5d7ac1f0b842 | 174 | } |
shimniok | 21:5d7ac1f0b842 | 175 | printf("%-15s ", p->d_name); |
shimniok | 21:5d7ac1f0b842 | 176 | } |
shimniok | 21:5d7ac1f0b842 | 177 | } |
shimniok | 21:5d7ac1f0b842 | 178 | putc('\n', stdout); |
shimniok | 21:5d7ac1f0b842 | 179 | if (cols < 3) |
shimniok | 21:5d7ac1f0b842 | 180 | putc('\n', stdout); |
shimniok | 21:5d7ac1f0b842 | 181 | closedir(d); |
shimniok | 21:5d7ac1f0b842 | 182 | } else { |
shimniok | 21:5d7ac1f0b842 | 183 | puts(path); |
shimniok | 21:5d7ac1f0b842 | 184 | puts(": No such directory\n"); |
shimniok | 21:5d7ac1f0b842 | 185 | } |
shimniok | 21:5d7ac1f0b842 | 186 | |
shimniok | 21:5d7ac1f0b842 | 187 | return; |
shimniok | 21:5d7ac1f0b842 | 188 | } |
shimniok | 21:5d7ac1f0b842 | 189 | |
shimniok | 21:5d7ac1f0b842 | 190 | |
shimniok | 21:5d7ac1f0b842 | 191 | void SimpleShell::rm(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 192 | { |
shimniok | 21:5d7ac1f0b842 | 193 | if (argc >= 2) { |
shimniok | 21:5d7ac1f0b842 | 194 | for (int i=1; i < argc; i++) { |
shimniok | 21:5d7ac1f0b842 | 195 | if (remove(canon(argv[i]))) { |
shimniok | 21:5d7ac1f0b842 | 196 | printf("%s: cannot remove\n", argv[i]); |
shimniok | 21:5d7ac1f0b842 | 197 | } |
shimniok | 21:5d7ac1f0b842 | 198 | } |
shimniok | 21:5d7ac1f0b842 | 199 | } else { |
shimniok | 21:5d7ac1f0b842 | 200 | puts("usage: rm [file1 [file2 ...]]"); |
shimniok | 21:5d7ac1f0b842 | 201 | } |
shimniok | 21:5d7ac1f0b842 | 202 | } |
shimniok | 21:5d7ac1f0b842 | 203 | |
shimniok | 21:5d7ac1f0b842 | 204 | |
shimniok | 21:5d7ac1f0b842 | 205 | void SimpleShell::touch(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 206 | { |
shimniok | 21:5d7ac1f0b842 | 207 | FILE *fp; |
shimniok | 21:5d7ac1f0b842 | 208 | |
shimniok | 21:5d7ac1f0b842 | 209 | if (argc >= 2) { |
shimniok | 21:5d7ac1f0b842 | 210 | for (int i=1; i < argc; i++) { |
shimniok | 21:5d7ac1f0b842 | 211 | if ((fp = fopen(canon(argv[i]), "w")) != NULL) { |
shimniok | 21:5d7ac1f0b842 | 212 | fclose(fp); |
shimniok | 21:5d7ac1f0b842 | 213 | } else { |
shimniok | 21:5d7ac1f0b842 | 214 | printf("%s: cannot touch\n", argv[1]); |
shimniok | 21:5d7ac1f0b842 | 215 | } |
shimniok | 21:5d7ac1f0b842 | 216 | } |
shimniok | 21:5d7ac1f0b842 | 217 | } else { |
shimniok | 21:5d7ac1f0b842 | 218 | puts("usage: touch [file1 [file2 ...]]"); |
shimniok | 21:5d7ac1f0b842 | 219 | } |
shimniok | 21:5d7ac1f0b842 | 220 | } |
shimniok | 21:5d7ac1f0b842 | 221 | |
shimniok | 21:5d7ac1f0b842 | 222 | |
shimniok | 21:5d7ac1f0b842 | 223 | void SimpleShell::cat(int argc, char **argv) |
shimniok | 21:5d7ac1f0b842 | 224 | { |
shimniok | 21:5d7ac1f0b842 | 225 | FILE *fp; |
shimniok | 21:5d7ac1f0b842 | 226 | //int status=0; |
shimniok | 21:5d7ac1f0b842 | 227 | char *buf = new char[MAXBUF]; |
shimniok | 21:5d7ac1f0b842 | 228 | |
shimniok | 21:5d7ac1f0b842 | 229 | for (int i=1; i < argc; i++) { |
shimniok | 21:5d7ac1f0b842 | 230 | //resolveDirectory(path, arg); |
shimniok | 21:5d7ac1f0b842 | 231 | if ((fp = fopen(canon(argv[i]), "r")) != NULL) { |
shimniok | 21:5d7ac1f0b842 | 232 | while (!feof(fp)) { |
shimniok | 21:5d7ac1f0b842 | 233 | fgets(buf, MAXBUF-1, fp); |
shimniok | 21:5d7ac1f0b842 | 234 | fputs(buf, stdout); |
shimniok | 21:5d7ac1f0b842 | 235 | } |
shimniok | 21:5d7ac1f0b842 | 236 | fclose(fp); |
shimniok | 21:5d7ac1f0b842 | 237 | } else { |
shimniok | 21:5d7ac1f0b842 | 238 | fputs(argv[i], stdout); |
shimniok | 21:5d7ac1f0b842 | 239 | fputs(": No such file\n", stdout); |
shimniok | 21:5d7ac1f0b842 | 240 | //status = 1; |
shimniok | 21:5d7ac1f0b842 | 241 | } |
shimniok | 21:5d7ac1f0b842 | 242 | } |
shimniok | 21:5d7ac1f0b842 | 243 | delete[] buf; |
shimniok | 21:5d7ac1f0b842 | 244 | |
shimniok | 21:5d7ac1f0b842 | 245 | return; |
shimniok | 21:5d7ac1f0b842 | 246 | } |
shimniok | 21:5d7ac1f0b842 | 247 | |
shimniok | 21:5d7ac1f0b842 | 248 | |
shimniok | 23:b1e49cfcaef6 | 249 | void SimpleShell::send(int argc, char **argv) |
shimniok | 23:b1e49cfcaef6 | 250 | { |
shimniok | 23:b1e49cfcaef6 | 251 | const char SOF=0x01; |
shimniok | 23:b1e49cfcaef6 | 252 | const char ETX=0x03; |
shimniok | 23:b1e49cfcaef6 | 253 | const char EOT=0x04; |
shimniok | 23:b1e49cfcaef6 | 254 | const char ACK=0x07; |
shimniok | 23:b1e49cfcaef6 | 255 | const char NACK=0x18; |
shimniok | 24:004e33abce37 | 256 | char buf[1024]; |
shimniok | 23:b1e49cfcaef6 | 257 | FILE *fp; |
shimniok | 24:004e33abce37 | 258 | char c; |
shimniok | 23:b1e49cfcaef6 | 259 | |
shimniok | 23:b1e49cfcaef6 | 260 | int i = 1; |
shimniok | 23:b1e49cfcaef6 | 261 | if (argc >= 2) { |
shimniok | 23:b1e49cfcaef6 | 262 | if ((fp = fopen(canon(argv[i]), "r")) == 0) { |
shimniok | 23:b1e49cfcaef6 | 263 | printf("%s: can't open file\n", basename(argv[i])); |
shimniok | 23:b1e49cfcaef6 | 264 | } else { |
shimniok | 24:004e33abce37 | 265 | puts("Ready; initiate receive on client."); |
shimniok | 24:004e33abce37 | 266 | c = getchar(); |
shimniok | 24:004e33abce37 | 267 | if (c == SOF) { |
shimniok | 24:004e33abce37 | 268 | puts(basename(argv[i])); |
shimniok | 24:004e33abce37 | 269 | c = getchar(); |
shimniok | 24:004e33abce37 | 270 | if (c == ACK) { |
shimniok | 24:004e33abce37 | 271 | while (!feof(fp)) { |
shimniok | 24:004e33abce37 | 272 | fgets(buf, 1024, fp); |
shimniok | 24:004e33abce37 | 273 | fputs(buf, stdout); |
shimniok | 24:004e33abce37 | 274 | } |
shimniok | 24:004e33abce37 | 275 | putchar(EOT); |
shimniok | 24:004e33abce37 | 276 | } else if (c == NACK) { |
shimniok | 24:004e33abce37 | 277 | puts("client error."); |
shimniok | 24:004e33abce37 | 278 | } else { |
shimniok | 24:004e33abce37 | 279 | puts("ACK/NACK expected"); |
shimniok | 24:004e33abce37 | 280 | } |
shimniok | 24:004e33abce37 | 281 | } else if (c == NACK) { |
shimniok | 24:004e33abce37 | 282 | puts("server cancelled."); |
shimniok | 24:004e33abce37 | 283 | } else { |
shimniok | 24:004e33abce37 | 284 | puts("SOF/NACK expected."); |
shimniok | 24:004e33abce37 | 285 | } |
shimniok | 24:004e33abce37 | 286 | fclose(fp); |
shimniok | 23:b1e49cfcaef6 | 287 | } |
shimniok | 23:b1e49cfcaef6 | 288 | } else { |
shimniok | 23:b1e49cfcaef6 | 289 | puts("usage: send file1 [file2 ...]"); |
shimniok | 23:b1e49cfcaef6 | 290 | } |
shimniok | 23:b1e49cfcaef6 | 291 | } |
shimniok | 23:b1e49cfcaef6 | 292 | |
shimniok | 23:b1e49cfcaef6 | 293 | |
shimniok | 21:5d7ac1f0b842 | 294 | void SimpleShell::run() |
shimniok | 21:5d7ac1f0b842 | 295 | { |
shimniok | 21:5d7ac1f0b842 | 296 | bool done=false; |
shimniok | 21:5d7ac1f0b842 | 297 | callback_t cb; |
shimniok | 21:5d7ac1f0b842 | 298 | //int status; // TODO implement command status return |
shimniok | 21:5d7ac1f0b842 | 299 | std::string x; |
shimniok | 21:5d7ac1f0b842 | 300 | |
shimniok | 21:5d7ac1f0b842 | 301 | printf("Type help for assistance.\n"); |
shimniok | 21:5d7ac1f0b842 | 302 | help(0, NULL); |
shimniok | 21:5d7ac1f0b842 | 303 | while (!done) { |
shimniok | 21:5d7ac1f0b842 | 304 | printPrompt(); |
shimniok | 21:5d7ac1f0b842 | 305 | readCommand(); |
shimniok | 21:5d7ac1f0b842 | 306 | if (argv[0]) { // skip blank command |
shimniok | 21:5d7ac1f0b842 | 307 | if (cb = findCommand()) { |
shimniok | 21:5d7ac1f0b842 | 308 | cb.call(argc, argv); |
shimniok | 21:5d7ac1f0b842 | 309 | } else { |
shimniok | 21:5d7ac1f0b842 | 310 | printf("command <%s> not found\n", argv[0]); |
shimniok | 21:5d7ac1f0b842 | 311 | } |
shimniok | 21:5d7ac1f0b842 | 312 | } |
shimniok | 21:5d7ac1f0b842 | 313 | } |
shimniok | 21:5d7ac1f0b842 | 314 | puts("exiting shell\n"); |
shimniok | 21:5d7ac1f0b842 | 315 | |
shimniok | 21:5d7ac1f0b842 | 316 | return; |
shimniok | 21:5d7ac1f0b842 | 317 | } |
shimniok | 21:5d7ac1f0b842 | 318 | |
shimniok | 21:5d7ac1f0b842 | 319 | |
shimniok | 28:753db82debb1 | 320 | void SimpleShell::command(callback_t cb, char *command) |
shimniok | 21:5d7ac1f0b842 | 321 | { |
shimniok | 21:5d7ac1f0b842 | 322 | if (lookupEnd < MAXLOOKUP) { |
shimniok | 21:5d7ac1f0b842 | 323 | lookup[lookupEnd].cb = cb; |
shimniok | 21:5d7ac1f0b842 | 324 | lookup[lookupEnd].command = command; |
shimniok | 21:5d7ac1f0b842 | 325 | lookupEnd++; |
shimniok | 21:5d7ac1f0b842 | 326 | } |
shimniok | 21:5d7ac1f0b842 | 327 | |
shimniok | 21:5d7ac1f0b842 | 328 | return; |
shimniok | 21:5d7ac1f0b842 | 329 | } |
shimniok | 21:5d7ac1f0b842 | 330 | |
shimniok | 21:5d7ac1f0b842 | 331 | |
shimniok | 21:5d7ac1f0b842 | 332 | SimpleShell::callback_t SimpleShell::findCommand() |
shimniok | 21:5d7ac1f0b842 | 333 | { |
shimniok | 21:5d7ac1f0b842 | 334 | SimpleShell::callback_t cb=NULL; |
shimniok | 21:5d7ac1f0b842 | 335 | |
shimniok | 21:5d7ac1f0b842 | 336 | for (int i=0; i < lookupEnd; i++) { |
shimniok | 21:5d7ac1f0b842 | 337 | if (strncmp(argv[0], lookup[i].command, MAXBUF) == 0) { |
shimniok | 21:5d7ac1f0b842 | 338 | cb = lookup[i].cb; |
shimniok | 21:5d7ac1f0b842 | 339 | break; |
shimniok | 21:5d7ac1f0b842 | 340 | } |
shimniok | 21:5d7ac1f0b842 | 341 | } |
shimniok | 21:5d7ac1f0b842 | 342 | |
shimniok | 21:5d7ac1f0b842 | 343 | return cb; |
shimniok | 21:5d7ac1f0b842 | 344 | } |
shimniok | 21:5d7ac1f0b842 | 345 | |
shimniok | 21:5d7ac1f0b842 | 346 | |
shimniok | 21:5d7ac1f0b842 | 347 | void SimpleShell::printPrompt() |
shimniok | 21:5d7ac1f0b842 | 348 | { |
shimniok | 21:5d7ac1f0b842 | 349 | fputc('(', stdout); |
shimniok | 21:5d7ac1f0b842 | 350 | fputs(_cwd, stdout); |
shimniok | 21:5d7ac1f0b842 | 351 | fputs(")# ", stdout); |
shimniok | 21:5d7ac1f0b842 | 352 | |
shimniok | 21:5d7ac1f0b842 | 353 | return; |
shimniok | 21:5d7ac1f0b842 | 354 | } |
shimniok | 21:5d7ac1f0b842 | 355 | |
shimniok | 21:5d7ac1f0b842 | 356 | |
shimniok | 21:5d7ac1f0b842 | 357 | void SimpleShell::readCommand() |
shimniok | 21:5d7ac1f0b842 | 358 | { |
shimniok | 21:5d7ac1f0b842 | 359 | int i=0; |
shimniok | 21:5d7ac1f0b842 | 360 | char c; |
shimniok | 21:5d7ac1f0b842 | 361 | bool done = false; |
shimniok | 21:5d7ac1f0b842 | 362 | static char cmd[MAXBUF]; |
shimniok | 21:5d7ac1f0b842 | 363 | |
shimniok | 21:5d7ac1f0b842 | 364 | memset(cmd, 0, MAXBUF); |
shimniok | 21:5d7ac1f0b842 | 365 | do { |
shimniok | 21:5d7ac1f0b842 | 366 | cmd[i] = 0; |
shimniok | 21:5d7ac1f0b842 | 367 | c = fgetc(stdin); |
shimniok | 21:5d7ac1f0b842 | 368 | if (c == '\r') { // if return is hit, we're done, don't add \r to cmd |
shimniok | 21:5d7ac1f0b842 | 369 | done = true; |
shimniok | 21:5d7ac1f0b842 | 370 | } else if (c == ESC) { // keyboard escape codes (arrow keys, etc) |
shimniok | 21:5d7ac1f0b842 | 371 | int c2 = getchar(); |
shimniok | 21:5d7ac1f0b842 | 372 | int c3 = getchar(); |
shimniok | 21:5d7ac1f0b842 | 373 | |
shimniok | 21:5d7ac1f0b842 | 374 | if (c2 == 0x4f && c3 == 0x46) { |
shimniok | 21:5d7ac1f0b842 | 375 | printf("<END>"); |
shimniok | 21:5d7ac1f0b842 | 376 | } else if (c2 == 0x5b) { |
shimniok | 21:5d7ac1f0b842 | 377 | |
shimniok | 21:5d7ac1f0b842 | 378 | if (c3 == UP) { |
shimniok | 21:5d7ac1f0b842 | 379 | printf("<UP>"); |
shimniok | 21:5d7ac1f0b842 | 380 | } else if (c3 == DOWN) { |
shimniok | 21:5d7ac1f0b842 | 381 | printf("<DOWN>"); |
shimniok | 21:5d7ac1f0b842 | 382 | } else if (c3 == RIGHT) { |
shimniok | 21:5d7ac1f0b842 | 383 | printf("<RIGHT>"); |
shimniok | 21:5d7ac1f0b842 | 384 | } else if (c3 == LEFT) { |
shimniok | 21:5d7ac1f0b842 | 385 | printf("<LEFT>"); |
shimniok | 21:5d7ac1f0b842 | 386 | } else if (c3 == HOME || c3 == INS || c3 == DEL || |
shimniok | 21:5d7ac1f0b842 | 387 | c3 == PGUP || c3 == PGDN) { |
shimniok | 21:5d7ac1f0b842 | 388 | char c4 = getchar(); |
shimniok | 21:5d7ac1f0b842 | 389 | if (c4 == TAIL) { |
shimniok | 21:5d7ac1f0b842 | 390 | if (c4 == HOME) { |
shimniok | 21:5d7ac1f0b842 | 391 | printf("<HOME>"); |
shimniok | 21:5d7ac1f0b842 | 392 | } else if (c4 == INS) { |
shimniok | 21:5d7ac1f0b842 | 393 | printf("<INS>"); |
shimniok | 21:5d7ac1f0b842 | 394 | } else if (c4 == DEL) { |
shimniok | 21:5d7ac1f0b842 | 395 | printf("<DEL>"); |
shimniok | 21:5d7ac1f0b842 | 396 | } else if (c4 == PGUP) { |
shimniok | 21:5d7ac1f0b842 | 397 | printf("<PGUP>"); |
shimniok | 21:5d7ac1f0b842 | 398 | } else if (c4 == PGDN) { |
shimniok | 21:5d7ac1f0b842 | 399 | printf("<PGDN>"); |
shimniok | 21:5d7ac1f0b842 | 400 | }//if |
shimniok | 21:5d7ac1f0b842 | 401 | }//if |
shimniok | 21:5d7ac1f0b842 | 402 | }//if |
shimniok | 21:5d7ac1f0b842 | 403 | }//if |
shimniok | 21:5d7ac1f0b842 | 404 | //printf("\n"); |
shimniok | 21:5d7ac1f0b842 | 405 | } else if (i < MAXBUF-1) { |
shimniok | 21:5d7ac1f0b842 | 406 | if (c == 0x7f || c == '\b') { // backspace or delete |
shimniok | 21:5d7ac1f0b842 | 407 | if (i > 0) { // if we're at the beginning, do nothing |
shimniok | 21:5d7ac1f0b842 | 408 | i--; |
shimniok | 21:5d7ac1f0b842 | 409 | fputs("\b \b", stdout); |
shimniok | 21:5d7ac1f0b842 | 410 | } |
shimniok | 21:5d7ac1f0b842 | 411 | } else { |
shimniok | 21:5d7ac1f0b842 | 412 | if (isprint(c)) |
shimniok | 21:5d7ac1f0b842 | 413 | fputc(c, stdout); |
shimniok | 21:5d7ac1f0b842 | 414 | cmd[i++] = c; |
shimniok | 21:5d7ac1f0b842 | 415 | } |
shimniok | 21:5d7ac1f0b842 | 416 | } |
shimniok | 21:5d7ac1f0b842 | 417 | |
shimniok | 21:5d7ac1f0b842 | 418 | } while (!done); |
shimniok | 21:5d7ac1f0b842 | 419 | fputc('\n', stdout); |
shimniok | 21:5d7ac1f0b842 | 420 | |
shimniok | 21:5d7ac1f0b842 | 421 | // remove leading/trailing whitespace |
shimniok | 21:5d7ac1f0b842 | 422 | char *s = cmd; |
shimniok | 21:5d7ac1f0b842 | 423 | while (isspace(*s)) { |
shimniok | 21:5d7ac1f0b842 | 424 | s++; |
shimniok | 21:5d7ac1f0b842 | 425 | } |
shimniok | 21:5d7ac1f0b842 | 426 | for (int j=i; j >= 0 && isspace(cmd[j]); j--) { |
shimniok | 21:5d7ac1f0b842 | 427 | cmd[j] = '\0'; |
shimniok | 21:5d7ac1f0b842 | 428 | } |
shimniok | 21:5d7ac1f0b842 | 429 | |
shimniok | 21:5d7ac1f0b842 | 430 | // split into command and arguments |
shimniok | 21:5d7ac1f0b842 | 431 | argc = 0; |
shimniok | 21:5d7ac1f0b842 | 432 | char *t; |
shimniok | 21:5d7ac1f0b842 | 433 | |
shimniok | 21:5d7ac1f0b842 | 434 | for (int i=0; i < MAXARGS; i++) { |
shimniok | 21:5d7ac1f0b842 | 435 | argv[i] = NULL; |
shimniok | 21:5d7ac1f0b842 | 436 | } |
shimniok | 21:5d7ac1f0b842 | 437 | t = strtok(s, " "); |
shimniok | 30:35522ea06236 | 438 | while (t && argc < MAXARGS) { |
shimniok | 21:5d7ac1f0b842 | 439 | argv[argc++] = t; |
shimniok | 21:5d7ac1f0b842 | 440 | t = strtok(NULL, " "); |
shimniok | 21:5d7ac1f0b842 | 441 | } |
shimniok | 21:5d7ac1f0b842 | 442 | |
shimniok | 21:5d7ac1f0b842 | 443 | return; |
shimniok | 21:5d7ac1f0b842 | 444 | } |