1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94"; 35 #endif 36 #endif 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/types.h> 42 #include <sys/time.h> 43 #include <sys/resource.h> 44 45 #include <err.h> 46 #include <limits.h> 47 #include <stdio.h> 48 #include <stdint.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <vis.h> 53 54 #include "ps.h" 55 56 static char *cmdpart(char *); 57 static char *shquote(char **); 58 59 static char * 60 shquote(char **argv) 61 { 62 long arg_max; 63 static size_t buf_size; 64 size_t len; 65 char **p, *dst, *src; 66 static char *buf = NULL; 67 68 if (buf == NULL) { 69 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1) 70 errx(1, "sysconf _SC_ARG_MAX failed"); 71 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4)) 72 errx(1, "sysconf _SC_ARG_MAX preposterously large"); 73 buf_size = 4 * arg_max + 1; 74 if ((buf = malloc(buf_size)) == NULL) 75 errx(1, "malloc failed"); 76 } 77 78 if (*argv == NULL) { 79 buf[0] = '\0'; 80 return (buf); 81 } 82 dst = buf; 83 for (p = argv; (src = *p++) != NULL; ) { 84 if (*src == '\0') 85 continue; 86 len = (buf_size - 1 - (dst - buf)) / 4; 87 strvisx(dst, src, strlen(src) < len ? strlen(src) : len, 88 VIS_NL | VIS_CSTYLE); 89 while (*dst != '\0') 90 dst++; 91 if ((buf_size - 1 - (dst - buf)) / 4 > 0) 92 *dst++ = ' '; 93 } 94 /* Chop off trailing space */ 95 if (dst != buf && dst[-1] == ' ') 96 dst--; 97 *dst = '\0'; 98 return (buf); 99 } 100 101 static char * 102 cmdpart(char *arg0) 103 { 104 char *cp; 105 106 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0); 107 } 108 109 const char * 110 fmt_argv(char **argv, char *cmd, char *thread, size_t maxlen) 111 { 112 size_t len; 113 char *ap, *cp; 114 115 if (argv == NULL || argv[0] == NULL) { 116 if (cmd == NULL) 117 return (""); 118 ap = NULL; 119 len = maxlen + 3; 120 } else { 121 ap = shquote(argv); 122 len = strlen(ap) + maxlen + 4; 123 } 124 cp = malloc(len); 125 if (cp == NULL) 126 errx(1, "malloc failed"); 127 if (ap == NULL) { 128 if (thread != NULL) { 129 asprintf(&ap, "%s/%s", cmd, thread); 130 sprintf(cp, "[%.*s]", (int)maxlen, ap); 131 free(ap); 132 } else 133 sprintf(cp, "[%.*s]", (int)maxlen, cmd); 134 } else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0) 135 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd); 136 else 137 strcpy(cp, ap); 138 return (cp); 139 } 140