Annotation of src/usr.bin/pmdb/clit.c, Revision 1.1
1.1 ! art 1: /* $PMDB: clit.c,v 1.11 2002/03/07 13:57:28 art Exp $ */
! 2: /*
! 3: * Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
! 4: * All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: *
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. The name of the author may not be used to endorse or promote products
! 13: * derived from this software without specific prior written permission.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
! 17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
! 18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <stdlib.h>
! 28: #include <stdio.h>
! 29: #include <histedit.h>
! 30: #include <err.h>
! 31: #include <string.h>
! 32:
! 33: #include "clit.h"
! 34:
! 35: extern char *__progname;
! 36:
! 37: char *prompt_add;
! 38:
! 39: static char *
! 40: prompt(EditLine *el)
! 41: {
! 42: static char p[64];
! 43:
! 44: snprintf(p, sizeof(p), "%s%s> ", __progname,
! 45: prompt_add ? prompt_add : "");
! 46:
! 47: return p;
! 48: }
! 49:
! 50: /*
! 51: * Returns number of commands that (at least partially) match "name".
! 52: */
! 53: static int
! 54: name_to_cmd(const char *name, struct clit *cmds, int ncmds, struct clit **res)
! 55: {
! 56: int i, len, ret;
! 57:
! 58: len = strlen(name);
! 59: ret = 0;
! 60:
! 61: for (i = 0; i < ncmds; i++) {
! 62: if (strncmp(cmds[i].cmd, name, len) == 0) {
! 63: *res = &cmds[i];
! 64: ret++;
! 65: }
! 66: }
! 67:
! 68: return ret;
! 69: }
! 70:
! 71: struct clitenv {
! 72: struct clit *cmds;
! 73: int ncmds;
! 74: EditLine *el;
! 75: History *hist;
! 76: };
! 77:
! 78: int
! 79: cmd_help(int argc, char **argv, void *arg)
! 80: {
! 81: struct clitenv *env = arg;
! 82: struct clit *cmds = env->cmds, *cmdp;
! 83: int ncmds = env->ncmds;
! 84: int i, res;
! 85:
! 86: if (argc > 1) {
! 87: res = name_to_cmd(argv[1], cmds, ncmds, &cmdp);
! 88: if (res == 1) {
! 89: printf("%s\t%s\n", cmdp->cmd, cmdp->help);
! 90: } else {
! 91: fprintf(stderr, "%s command: %s\n",
! 92: res == 0 ? "unknown" : "ambiguous", argv[1]);
! 93: }
! 94:
! 95: return 0;
! 96: }
! 97: for (i = 0; i < ncmds; i++) {
! 98: cmdp = &cmds[i];
! 99:
! 100: printf("%s\t%s\n", cmdp->cmd, cmdp->help);
! 101: }
! 102:
! 103: return 0;
! 104: }
! 105:
! 106: /*
! 107: * XXX - there is no way to push external args into this function.
! 108: */
! 109: unsigned char
! 110: complt(EditLine *el, int ch)
! 111: {
! 112: const LineInfo *line;
! 113: char str[1024];
! 114: int len, ret;
! 115:
! 116: line = el_line(el);
! 117: if (line->cursor != line->lastchar)
! 118: return CC_ERROR;
! 119:
! 120: len = line->lastchar - line->buffer;
! 121:
! 122: if (len >= 1023)
! 123: return CC_ERROR;
! 124:
! 125: memcpy(str, line->buffer, len);
! 126: str[len] = '\0';
! 127:
! 128: ret = cmd_complt(str, sizeof(str));
! 129:
! 130: el_push(el, &str[len]);
! 131:
! 132: return ret ? CC_ERROR : CC_REDISPLAY;
! 133: }
! 134:
! 135: void *
! 136: cmdinit(struct clit *cmds, int ncmds)
! 137: {
! 138: struct clitenv *env;
! 139: #ifdef __NetBSD__
! 140: HistEvent ev;
! 141: #endif
! 142:
! 143: if ((env = malloc(sizeof(*env))) == NULL)
! 144: err(1, "Can't init cmd interpreter.");
! 145:
! 146: env->cmds = cmds;
! 147: env->ncmds = ncmds;
! 148:
! 149: env->hist = history_init();
! 150: #ifdef __NetBSD__
! 151: history(env->hist, &ev, H_SETSIZE, 100);
! 152: #else
! 153: history(env->hist, H_EVENT, 100);
! 154: #endif
! 155:
! 156: #ifdef __NetBSD__
! 157: env->el = el_init(__progname, stdin, stdout, stderr);
! 158: #else
! 159: env->el = el_init(__progname, stdin, stdout);
! 160: #endif
! 161: el_set(env->el, EL_EDITOR, "emacs");
! 162: el_set(env->el, EL_PROMPT, prompt);
! 163: el_set(env->el, EL_HIST, history, env->hist);
! 164: el_set(env->el, EL_ADDFN, "complt", "complete", complt);
! 165: el_set(env->el, EL_BIND, "\t", "complt");
! 166: el_source(env->el, NULL);
! 167:
! 168: /* XXX - EL_SIGNAL ? */
! 169:
! 170: return env;
! 171: }
! 172:
! 173: void
! 174: cmdend(void *arg)
! 175: {
! 176: struct clitenv *env = arg;
! 177:
! 178: el_end(env->el);
! 179: history_end(env->hist);
! 180:
! 181: free(env);
! 182: }
! 183:
! 184: int
! 185: cmdloop(void *arg)
! 186: {
! 187: struct clitenv *env = arg;
! 188: EditLine *el = env->el;
! 189: History *hist = env->hist;
! 190: const char *elline;
! 191: int cnt;
! 192: char **argv;
! 193: int maxargs = 16; /* XXX */
! 194: int stop;
! 195:
! 196: stop = 0;
! 197:
! 198: if ((argv = malloc(sizeof(char *) * maxargs)) == NULL)
! 199: err(1, "malloc");
! 200:
! 201: while (!stop && (elline = el_gets(el, &cnt)) != NULL) {
! 202: char *line, *orgline;
! 203: struct clit *cmdp;
! 204: char **ap;
! 205: int argc, res;
! 206: #ifdef __NetBSD__
! 207: HistEvent ev;
! 208: #endif
! 209:
! 210: memset(argv, 0, sizeof(argv));
! 211:
! 212: #ifdef __NetBSD__
! 213: history(hist, &ev, H_ENTER, elline);
! 214: #else
! 215: history(hist, H_ENTER, elline);
! 216: #endif
! 217:
! 218: orgline = line = strdup(elline);
! 219:
! 220: argc = 0;
! 221: for (ap = argv; (*ap = strsep(&line, " \t\n")) != NULL;) {
! 222: if (**ap != '\0') {
! 223: ++ap;
! 224: if (++argc == maxargs)
! 225: break;
! 226: }
! 227: }
! 228: if (argc == maxargs) {
! 229: fprintf(stderr, "Too many arguments\n");
! 230: goto cmdout;
! 231: }
! 232: if (!argc)
! 233: goto cmdout;
! 234:
! 235: /*
! 236: * Editline commands.
! 237: */
! 238: if (el_parse(el, argc, argv) != -1)
! 239: goto cmdout;
! 240:
! 241: if ((res = name_to_cmd(argv[0], env->cmds, env->ncmds,
! 242: &cmdp)) == 1) {
! 243: if (argc - 1 > cmdp->maxargc)
! 244: fprintf(stderr, "Too many arguments\n");
! 245: else if (argc - 1 < cmdp->minargc)
! 246: fprintf(stderr, "Too few arguments\n");
! 247: else
! 248: stop = (*cmdp->handler)(argc, argv,
! 249: cmdp->arg ? cmdp->arg : env);
! 250: } else {
! 251: fprintf(stderr, "%s command: %s\n",
! 252: res == 0 ? "unknown" : "ambiguous", argv[0]);
! 253: }
! 254: cmdout:
! 255: free(orgline);
! 256: }
! 257: free(argv);
! 258:
! 259: return stop;
! 260: }
! 261:
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