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 #include <sys/types.h> 40 #include <sys/time.h> 41 #include <sys/resource.h> 42 43 #include <err.h> 44 #include <limits.h> 45 #include <stdio.h> 46 #include <stdint.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <vis.h> 51 52 #include "ps.h" 53 54 static char *cmdpart(char *); 55 static char *shquote(char **); 56 57 static char * 58 shquote(char **argv) 59 { 60 long arg_max; 61 static size_t buf_size; 62 size_t len; 63 char **p, *dst, *src; 64 static char *buf = NULL; 65 66 if (buf == NULL) { 67 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1) 68 errx(1, "sysconf _SC_ARG_MAX failed"); 69 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4)) 70 errx(1, "sysconf _SC_ARG_MAX preposterously large"); 71 buf_size = 4 * arg_max + 1; 72 if ((buf = malloc(buf_size)) == NULL) 73 errx(1, "malloc failed"); 74 } 75 76 if (*argv == NULL) { 77 buf[0] = '\0'; 78 return (buf); 79 } 80 dst = buf; 81 for (p = argv; (src = *p++) != NULL; ) { 82 if (*src == '\0') 83 continue; 84 len = (buf_size - 1 - (dst - buf)) / 4; 85 strvisx(dst, src, strlen(src) < len ? strlen(src) : len, 86 VIS_NL | VIS_CSTYLE); 87 while (*dst != '\0') 88 dst++; 89 if ((buf_size - 1 - (dst - buf)) / 4 > 0) 90 *dst++ = ' '; 91 } 92 /* Chop off trailing space */ 93 if (dst != buf && dst[-1] == ' ') 94 dst--; 95 *dst = '\0'; 96 return (buf); 97 } 98 99 static char * 100 cmdpart(char *arg0) 101 { 102 char *cp; 103 104 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0); 105 } 106 107 const char * 108 fmt_argv(char **argv, char *cmd, char *thread, size_t maxlen) 109 { 110 size_t len; 111 char *ap, *cp; 112 113 if (argv == NULL || argv[0] == NULL) { 114 if (cmd == NULL) 115 return (""); 116 ap = NULL; 117 len = maxlen + 3; 118 } else { 119 ap = shquote(argv); 120 len = strlen(ap) + maxlen + 4; 121 } 122 cp = malloc(len); 123 if (cp == NULL) 124 errx(1, "malloc failed"); 125 if (ap == NULL) { 126 if (thread != NULL) { 127 asprintf(&ap, "%s/%s", cmd, thread); 128 sprintf(cp, "[%.*s]", (int)maxlen, ap); 129 free(ap); 130 } else 131 sprintf(cp, "[%.*s]", (int)maxlen, cmd); 132 } else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0) 133 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd); 134 else 135 strcpy(cp, ap); 136 return (cp); 137 } 138