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 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include <sys/types.h> 44 #include <sys/time.h> 45 #include <sys/resource.h> 46 47 #include <err.h> 48 #include <limits.h> 49 #include <stdio.h> 50 #include <stdint.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <vis.h> 55 56 #include "ps.h" 57 58 static char *cmdpart(char *); 59 static char *shquote(char **); 60 61 static char * 62 shquote(char **argv) 63 { 64 long arg_max; 65 static size_t buf_size; 66 size_t len; 67 char **p, *dst, *src; 68 static char *buf = NULL; 69 70 if (buf == NULL) { 71 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1) 72 errx(1, "sysconf _SC_ARG_MAX failed"); 73 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4)) 74 errx(1, "sysconf _SC_ARG_MAX preposterously large"); 75 buf_size = 4 * arg_max + 1; 76 if ((buf = malloc(buf_size)) == NULL) 77 errx(1, "malloc failed"); 78 } 79 80 if (*argv == NULL) { 81 buf[0] = '\0'; 82 return (buf); 83 } 84 dst = buf; 85 for (p = argv; (src = *p++) != NULL; ) { 86 if (*src == '\0') 87 continue; 88 len = (buf_size - 1 - (dst - buf)) / 4; 89 strvisx(dst, src, strlen(src) < len ? strlen(src) : len, 90 VIS_NL | VIS_CSTYLE); 91 while (*dst != '\0') 92 dst++; 93 if ((buf_size - 1 - (dst - buf)) / 4 > 0) 94 *dst++ = ' '; 95 } 96 /* Chop off trailing space */ 97 if (dst != buf && dst[-1] == ' ') 98 dst--; 99 *dst = '\0'; 100 return (buf); 101 } 102 103 static char * 104 cmdpart(char *arg0) 105 { 106 char *cp; 107 108 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0); 109 } 110 111 const char * 112 fmt_argv(char **argv, char *cmd, size_t maxlen) 113 { 114 size_t len; 115 char *ap, *cp; 116 117 if (argv == NULL || argv[0] == NULL) { 118 if (cmd == NULL) 119 return (""); 120 ap = NULL; 121 len = maxlen + 3; 122 } else { 123 ap = shquote(argv); 124 len = strlen(ap) + maxlen + 4; 125 } 126 cp = malloc(len); 127 if (cp == NULL) 128 errx(1, "malloc failed"); 129 if (ap == NULL) 130 sprintf(cp, " (%.*s)", (int)maxlen, cmd); 131 else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0) 132 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd); 133 else 134 (void) strcpy(cp, ap); 135 return (cp); 136 } 137