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 #include <sys/types.h> 33 #include <sys/time.h> 34 #include <sys/resource.h> 35 36 #include <err.h> 37 #include <limits.h> 38 #include <stdio.h> 39 #include <stdint.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include <vis.h> 44 45 #include "ps.h" 46 47 static char *cmdpart(char *); 48 static char *shquote(char **); 49 50 static char * 51 shquote(char **argv) 52 { 53 long arg_max; 54 static size_t buf_size; 55 size_t len; 56 char **p, *dst, *src; 57 static char *buf = NULL; 58 59 if (buf == NULL) { 60 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1) 61 errx(1, "sysconf _SC_ARG_MAX failed"); 62 if (arg_max >= LONG_MAX / 4 || arg_max >= (long)(SIZE_MAX / 4)) 63 errx(1, "sysconf _SC_ARG_MAX preposterously large"); 64 buf_size = 4 * arg_max + 1; 65 if ((buf = malloc(buf_size)) == NULL) 66 errx(1, "malloc failed"); 67 } 68 69 if (*argv == NULL) { 70 buf[0] = '\0'; 71 return (buf); 72 } 73 dst = buf; 74 for (p = argv; (src = *p++) != NULL; ) { 75 if (*src == '\0') 76 continue; 77 len = (buf_size - 1 - (dst - buf)) / 4; 78 strvisx(dst, src, strlen(src) < len ? strlen(src) : len, 79 VIS_NL | VIS_CSTYLE); 80 while (*dst != '\0') 81 dst++; 82 if ((buf_size - 1 - (dst - buf)) / 4 > 0) 83 *dst++ = ' '; 84 } 85 /* Chop off trailing space */ 86 if (dst != buf && dst[-1] == ' ') 87 dst--; 88 *dst = '\0'; 89 return (buf); 90 } 91 92 static char * 93 cmdpart(char *arg0) 94 { 95 char *cp; 96 97 return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0); 98 } 99 100 const char * 101 fmt_argv(char **argv, char *cmd, char *thread, size_t maxlen) 102 { 103 size_t len; 104 char *ap, *cp; 105 106 if (argv == NULL || argv[0] == NULL) { 107 if (cmd == NULL) 108 return (""); 109 ap = NULL; 110 len = maxlen + 3; 111 } else { 112 ap = shquote(argv); 113 len = strlen(ap) + maxlen + 4; 114 } 115 cp = malloc(len); 116 if (cp == NULL) 117 errx(1, "malloc failed"); 118 if (ap == NULL) { 119 if (thread != NULL) { 120 asprintf(&ap, "%s/%s", cmd, thread); 121 sprintf(cp, "[%.*s]", (int)maxlen, ap); 122 free(ap); 123 } else 124 sprintf(cp, "[%.*s]", (int)maxlen, cmd); 125 } else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0) 126 sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd); 127 else 128 strcpy(cp, ap); 129 return (cp); 130 } 131