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 * 4. 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 * @(#)cmds.c 8.2 (Berkeley) 4/29/95 30 * $FreeBSD: src/usr.bin/systat/cmds.c,v 1.3 1999/08/28 01:05:58 peter Exp $ 31 * $DragonFly: src/usr.bin/systat/cmds.c,v 1.6 2008/11/10 04:59:45 swildner Exp $ 32 */ 33 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <signal.h> 37 #include <ctype.h> 38 #include <string.h> 39 #include "systat.h" 40 #include "extern.h" 41 42 void 43 command(const char *cmd) 44 { 45 struct cmdtab *p; 46 char *cp; 47 int omask; 48 double interval; 49 50 omask = sigblock(sigmask(SIGALRM)); 51 for (cp = __DECONST(char *, cmd); *cp && !isspace(*cp); cp++) 52 ; 53 if (*cp) 54 *cp++ = '\0'; 55 if (*cmd == '\0') 56 return; 57 for (; *cp && isspace(*cp); cp++) 58 ; 59 if (strcmp(cmd, "quit") == 0 || strcmp(cmd, "q") == 0) 60 die(0); 61 if (strcmp(cmd, "load") == 0) { 62 load(); 63 goto done; 64 } 65 if (strcmp(cmd, "stop") == 0) { 66 alarm(0); 67 mvaddstr(CMDLINE, 0, "Refresh disabled."); 68 clrtoeol(); 69 goto done; 70 } 71 if (strcmp(cmd, "help") == 0) { 72 int _col, _len; 73 74 move(CMDLINE, _col = 0); 75 for (p = cmdtab; p->c_name; p++) { 76 _len = strlen(p->c_name); 77 if (_col + _len > COLS) 78 break; 79 addstr(p->c_name); _col += _len; 80 if (_col + 1 < COLS) 81 addch(' '); 82 } 83 clrtoeol(); 84 goto done; 85 } 86 interval = strtod(cmd, NULL); 87 if (interval <= 0.0 && 88 (strcmp(cmd, "start") == 0 || strcmp(cmd, "interval") == 0)) { 89 interval = *cp ? strtod(cp, NULL) : naptime; 90 if (interval <= 0.0) { 91 error("%3.2f: bad interval.", interval); 92 goto done; 93 } 94 } 95 if (interval > 0.0) { 96 alarm(0); 97 naptime = interval; 98 display(0); 99 status(); 100 goto done; 101 } 102 p = lookup(cmd); 103 if (p == (struct cmdtab *)-1) { 104 error("%s: Ambiguous command.", cmd); 105 goto done; 106 } 107 if (p) { 108 if (curcmd == p) 109 goto done; 110 alarm(0); 111 (*curcmd->c_close)(wnd); 112 wnd = (*p->c_open)(); 113 if (wnd == 0) { 114 error("Couldn't open new display"); 115 wnd = (*curcmd->c_open)(); 116 if (wnd == 0) { 117 error("Couldn't change back to previous cmd"); 118 exit(1); 119 } 120 p = curcmd; 121 } 122 if ((p->c_flags & CF_INIT) == 0) { 123 if ((*p->c_init)()) 124 p->c_flags |= CF_INIT; 125 else 126 goto done; 127 } 128 curcmd = p; 129 labels(); 130 display(0); 131 status(); 132 goto done; 133 } 134 if (curcmd->c_cmd == 0 || !(*curcmd->c_cmd)(cmd, cp)) 135 error("%s: Unknown command.", cmd); 136 done: 137 sigsetmask(omask); 138 } 139 140 struct cmdtab * 141 lookup(const char *name) 142 { 143 const char *p, *q; 144 struct cmdtab *ct, *found; 145 int nmatches, longest; 146 147 longest = 0; 148 nmatches = 0; 149 found = NULL; 150 for (ct = cmdtab; (p = ct->c_name); ct++) { 151 for (q = name; *q == *p++; q++) 152 if (*q == 0) /* exact match? */ 153 return (ct); 154 if (!*q) { /* the name was a prefix */ 155 if (q - name > longest) { 156 longest = q - name; 157 nmatches = 1; 158 found = ct; 159 } else if (q - name == longest) 160 nmatches++; 161 } 162 } 163 if (nmatches > 1) 164 return ((struct cmdtab *)-1); 165 return (found); 166 } 167 168 void 169 status(void) 170 { 171 172 error("Showing %s, refresh every %3.2f seconds.", 173 curcmd->c_name, naptime); 174 } 175 176 int 177 prefix(const char *s1, const char *s2) 178 { 179 180 while (*s1 == *s2) { 181 if (*s1 == '\0') 182 return (1); 183 s1++, s2++; 184 } 185 return (*s1 == '\0'); 186 } 187