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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef lint 39 static const char sccsid[] = "@(#)cmds.c 8.2 (Berkeley) 4/29/95"; 40 #endif 41 42 #include <ctype.h> 43 #include <signal.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "systat.h" 49 #include "extern.h" 50 51 void 52 command(const char *cmd) 53 { 54 struct cmdtab *p; 55 char *cp, *tmpstr, *tmpstr1; 56 int interval, omask; 57 58 tmpstr = tmpstr1 = strdup(cmd); 59 omask = sigblock(sigmask(SIGALRM)); 60 for (cp = tmpstr1; *cp && !isspace(*cp); cp++) 61 ; 62 if (*cp) 63 *cp++ = '\0'; 64 if (*tmpstr1 == '\0') 65 return; 66 for (; *cp && isspace(*cp); cp++) 67 ; 68 if (strcmp(tmpstr1, "quit") == 0 || strcmp(tmpstr1, "q") == 0) 69 die(0); 70 if (strcmp(tmpstr1, "load") == 0) { 71 load(); 72 goto done; 73 } 74 if (strcmp(tmpstr1, "stop") == 0) { 75 alarm(0); 76 mvaddstr(CMDLINE, 0, "Refresh disabled."); 77 clrtoeol(); 78 goto done; 79 } 80 if (strcmp(tmpstr1, "help") == 0) { 81 int _col, _len; 82 83 move(CMDLINE, _col = 0); 84 for (p = cmdtab; p->c_name; p++) { 85 _len = strlen(p->c_name); 86 if (_col + _len > COLS) 87 break; 88 addstr(p->c_name); _col += _len; 89 if (_col + 1 < COLS) 90 addch(' '); 91 } 92 clrtoeol(); 93 goto done; 94 } 95 interval = atoi(tmpstr1); 96 if (interval <= 0 && 97 (strcmp(tmpstr1, "start") == 0 || strcmp(tmpstr1, "interval") == 0)) { 98 interval = *cp ? atoi(cp) : naptime; 99 if (interval <= 0) { 100 error("%d: bad interval.", interval); 101 goto done; 102 } 103 } 104 if (interval > 0) { 105 alarm(0); 106 naptime = interval; 107 display(0); 108 status(); 109 goto done; 110 } 111 p = lookup(tmpstr1); 112 if (p == (struct cmdtab *)-1) { 113 error("%s: Ambiguous command.", tmpstr1); 114 goto done; 115 } 116 if (p) { 117 if (curcmd == p) 118 goto done; 119 alarm(0); 120 (*curcmd->c_close)(wnd); 121 curcmd->c_flags &= ~CF_INIT; 122 wnd = (*p->c_open)(); 123 if (wnd == 0) { 124 error("Couldn't open new display"); 125 wnd = (*curcmd->c_open)(); 126 if (wnd == 0) { 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(0); 141 status(); 142 goto done; 143 } 144 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(tmpstr1, cp)) 145 error("%s: Unknown command.", tmpstr1); 146 done: 147 sigsetmask(omask); 148 free(tmpstr); 149 } 150 151 struct cmdtab * 152 lookup(const char *name) 153 { 154 const char *p, *q; 155 struct cmdtab *ct, *found; 156 int nmatches, longest; 157 158 longest = 0; 159 nmatches = 0; 160 found = (struct cmdtab *) 0; 161 for (ct = cmdtab; (p = ct->c_name); ct++) { 162 for (q = name; *q == *p++; q++) 163 if (*q == 0) /* exact match? */ 164 return (ct); 165 if (!*q) { /* the name was a prefix */ 166 if (q - name > longest) { 167 longest = q - name; 168 nmatches = 1; 169 found = ct; 170 } else if (q - name == longest) 171 nmatches++; 172 } 173 } 174 if (nmatches > 1) 175 return ((struct cmdtab *)-1); 176 return (found); 177 } 178 179 void 180 status(void) 181 { 182 183 error("Showing %s, refresh every %d seconds.", 184 curcmd->c_name, naptime); 185 } 186 187 int 188 prefix(const char *s1, const char *s2) 189 { 190 191 while (*s1 == *s2) { 192 if (*s1 == '\0') 193 return (1); 194 s1++, s2++; 195 } 196 return (*s1 == '\0'); 197 } 198