1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifdef lint 35 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 36 #endif 37 38 #include <sys/param.h> 39 40 #include <ctype.h> 41 #include <signal.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "systat.h" 47 #include "extern.h" 48 49 void 50 command(const char *cmd) 51 { 52 struct cmdtab *p; 53 char *cp, *tmpstr, *tmpstr1; 54 double t; 55 56 tmpstr = tmpstr1 = strdup(cmd); 57 for (cp = tmpstr1; *cp && !isspace(*cp); cp++) 58 ; 59 if (*cp) 60 *cp++ = '\0'; 61 if (*tmpstr1 == '\0') 62 return; 63 for (; *cp && isspace(*cp); cp++) 64 ; 65 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0) 66 die(0); 67 if (strcmp(tmpstr1, "load") == 0) { 68 load(); 69 goto done; 70 } 71 if (strcmp(tmpstr1, "stop") == 0) { 72 delay = 0; 73 mvaddstr(CMDLINE, 0, "Refresh disabled."); 74 clrtoeol(); 75 goto done; 76 } 77 if (strcmp(tmpstr1, "help") == 0) { 78 int _col, _len; 79 80 move(CMDLINE, _col = 0); 81 for (p = cmdtab; p->c_name; p++) { 82 _len = strlen(p->c_name); 83 if (_col + _len > COLS) 84 break; 85 addstr(p->c_name); _col += _len; 86 if (_col + 1 < COLS) 87 addch(' '); 88 } 89 clrtoeol(); 90 goto done; 91 } 92 t = strtod(tmpstr1, NULL) * 1000000.0; 93 if (t > 0 && t < (double)UINT_MAX) 94 delay = (unsigned int)t; 95 if ((t <= 0 || t > (double)UINT_MAX) && 96 (strcmp(tmpstr1, "start") == 0 || 97 strcmp(tmpstr1, "interval") == 0)) { 98 if (*cp != '\0') { 99 t = strtod(cp, NULL) * 1000000.0; 100 if (t <= 0 || t >= (double)UINT_MAX) { 101 error("%d: bad interval.", (int)t); 102 goto done; 103 } 104 } 105 } 106 if (t > 0) { 107 delay = (unsigned int)t; 108 display(); 109 status(); 110 goto done; 111 } 112 p = lookup(tmpstr1); 113 if (p == (struct cmdtab *)-1) { 114 error("%s: Ambiguous command.", tmpstr1); 115 goto done; 116 } 117 if (p) { 118 if (curcmd == p) 119 goto done; 120 (*curcmd->c_close)(wnd); 121 curcmd->c_flags &= ~CF_INIT; 122 wnd = (*p->c_open)(); 123 if (wnd == NULL) { 124 error("Couldn't open new display"); 125 wnd = (*curcmd->c_open)(); 126 if (wnd == NULL) { 127 error("Couldn't change back to previous cmd"); 128 exit(1); 129 } 130 p = curcmd; 131 } 132 if ((p->c_flags & CF_INIT) == 0) { 133 if ((*p->c_init)()) 134 p->c_flags |= CF_INIT; 135 else 136 goto done; 137 } 138 curcmd = p; 139 labels(); 140 display(); 141 status(); 142 goto done; 143 } 144 if (curcmd->c_cmd == NULL || !(*curcmd->c_cmd)(tmpstr1, cp)) 145 error("%s: Unknown command.", tmpstr1); 146 done: 147 free(tmpstr); 148 } 149 150 struct cmdtab * 151 lookup(const char *name) 152 { 153 const char *p, *q; 154 struct cmdtab *ct, *found; 155 int nmatches, longest; 156 157 longest = 0; 158 nmatches = 0; 159 found = (struct cmdtab *) 0; 160 for (ct = cmdtab; (p = ct->c_name); ct++) { 161 for (q = name; *q == *p++; q++) 162 if (*q == 0) /* exact match? */ 163 return (ct); 164 if (!*q) { /* the name was a prefix */ 165 if (q - name > longest) { 166 longest = q - name; 167 nmatches = 1; 168 found = ct; 169 } else if (q - name == longest) 170 nmatches++; 171 } 172 } 173 if (nmatches > 1) 174 return ((struct cmdtab *)-1); 175 return (found); 176 } 177 178 void 179 status(void) 180 { 181 182 error("Showing %s, refresh every %d seconds.", 183 curcmd->c_name, delay / 1000000); 184 } 185 186 int 187 prefix(const char *s1, const char *s2) 188 { 189 190 while (*s1 == *s2) { 191 if (*s1 == '\0') 192 return (1); 193 s1++, s2++; 194 } 195 return (*s1 == '\0'); 196 } 197