1 /*- 2 * Copyright (c) 1992, 1993, 1994 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 #if 0 35 #ifndef lint 36 static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94"; 37 #endif 38 #endif 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/types.h> 43 #include <sys/time.h> 44 #include <sys/resource.h> 45 46 #include <err.h> 47 #include <limits.h> 48 #include <stdio.h> 49 #include <stdint.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <vis.h> 54 55 #include "ps.h" 56 57 static char *cmdpart(char *); 58 static char *shquote(char **); 59 60 static char * 61 shquote(char **argv) 62 { 63 long arg_max; 64 static size_t buf_size; 65 size_t len; 66 char **p, *dst, *src; 67 static char *buf = NULL; 68 69 if (buf == NULL) { 70 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1) 71 errx(1, "sysconf _SC_ARG_MAX failed"); 72 if (arg_max >= LONG_MAX / 4 || 4 * arg_max + 1 > SIZE_MAX) 73 errx(1, "sysconf _SC_ARG_MAX preposterously large"); 74 buf_size = 4 * arg_max + 1; 75 if ((buf = malloc(buf_size)) == NULL) 76 errx(1, "malloc failed"); 77 } 78 79 if (*argv == NULL) { 80 buf[0] = '\0'; 81 return (buf); 82 } 83 dst = buf; 84 for (p = argv; (src = *p++) != NULL; ) { 85 if (*src == '\0') 86 continue; 87 len = (buf_size - 1 - (dst - buf)) / 4; 88 strvisx(dst, src, strlen(src) < len ? strlen(src) : len, 89 VIS_NL | VIS_CSTYLE); 90 while (*dst != '\0') 91 dst++; 92 if ((buf_size - 1 - (dst - buf)) / 4 > 0) 93 *dst++ = ' '; 94 } 95 /* Chop off trailing space */ 96 if (dst != buf && dst[-1] == ' ') 97 dst--; 98 *dst = '\0'; 99 return (buf); 100 } 101 102 static char * 103 cmdpart(char *arg0) 104 { 105 char *cp; 106 107 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0); 108 } 109 110 const char * 111 fmt_argv(char **argv, char *cmd, size_t maxlen) 112 { 113 size_t len; 114 char *ap, *cp; 115 116 if (argv == NULL || argv[0] == NULL) { 117 if (cmd == NULL) 118 return (""); 119 ap = NULL; 120 len = maxlen + 3; 121 } else { 122 ap = shquote(argv); 123 len = strlen(ap) + maxlen + 4; 124 } 125 cp = malloc(len); 126 if (cp == NULL) 127 errx(1, "malloc failed"); 128 if (ap == NULL) 129 sprintf(cp, " (%.*s)", (int)maxlen, cmd); 130 else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0) 131 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd); 132 else 133 (void) strcpy(cp, ap); 134 return (cp); 135 } 136