bin/ps/fmt.c

   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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)fmt.c    8.4 (Berkeley) 4/15/94
  30  * $FreeBSD: src/bin/ps/fmt.c,v 1.14.2.1 2002/03/16 01:15:11 mikeh Exp $
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/queue.h>
  35 #include <sys/time.h>
  36 #include <sys/resource.h>
  37 #include <err.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42 #include <vis.h>
  43 #include "ps.h"
  44
  45 static char *cmdpart (char *);
  46 static char *shquote (char **);
  47
  48 /*
  49  * XXX
  50  * This is a stub until marc does the real one.
  51  */
  52 static char *
  53 shquote(char **argv)
  54 {
  55         static long arg_max = -1;
  56         size_t len;
  57         char **p, *dst, *src;
  58         static char *buf = NULL;
  59
  60         if (buf == NULL) {
  61                 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
  62                         errx(1, "sysconf _SC_ARG_MAX failed");
  63                 if ((buf = malloc((4 * arg_max)  +  1)) == NULL)
  64                         errx(1, "malloc failed");
  65         }
  66
  67         if (*argv == NULL) {
  68                 buf[0] = 0;
  69                 return (buf);
  70         }
  71         dst = buf;
  72         for (p = argv; (src = *p++) != NULL; ) {
  73                 if (*src == 0)
  74                         continue;
  75                 len = (4 * arg_max - (dst - buf)) / 4;
  76                 strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
  77                     VIS_NL | VIS_CSTYLE);
  78                 while (*dst)
  79                         dst++;
  80                 if ((4 * arg_max - (dst - buf)) / 4 > 0)
  81                         *dst++ = ' ';
  82         }
  83         /* Chop off trailing space */
  84         if (dst != buf && dst[-1] == ' ')
  85                 dst--;
  86         *dst = '\0';
  87         return (buf);
  88 }
  89
  90 static char *
  91 cmdpart(char *arg0)
  92 {
  93         char *cp;
  94
  95         return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
  96 }
  97
  98 const char *
  99 fmt_argv(char **argv, char *cmd, int maxlen)
 100 {
 101         int len;
 102         char *ap, *cp;
 103
 104         if (argv == NULL || argv[0] == NULL) {
 105                 if (cmd == NULL)
 106                         return ("");
 107                 ap = NULL;
 108                 len = maxlen + 3;
 109         } else {
 110                 ap = shquote(argv);
 111                 len = strlen(ap) + maxlen + 4;
 112         }
 113         if ((cp = malloc(len)) == NULL)
 114                 return (NULL);
 115         if (ap == NULL)
 116                 sprintf(cp, "(%.*s)", maxlen, cmd);
 117         else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
 118                 sprintf(cp, "%s (%.*s)", ap, maxlen, cmd);
 119         else
 120                 strcpy(cp, ap);
 121         return (cp);
 122 }