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. 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  * @(#)fmt.c    8.4 (Berkeley) 4/15/94
  34  * $FreeBSD: src/bin/ps/fmt.c,v 1.14.2.1 2002/03/16 01:15:11 mikeh Exp $
  35  * $DragonFly: src/bin/ps/fmt.c,v 1.7 2004/11/16 12:16:36 joerg Exp $
  36  */
  37
  38 #include <sys/types.h>
  39 #include <sys/queue.h>
  40 #include <sys/time.h>
  41 #include <sys/resource.h>
  42 #include <err.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include <vis.h>
  48 #include "ps.h"
  49
  50 static char *cmdpart (char *);
  51 static char *shquote (char **);
  52
  53 /*
  54  * XXX
  55  * This is a stub until marc does the real one.
  56  */
  57 static char *
  58 shquote(char **argv)
  59 {
  60         static long arg_max = -1;
  61         size_t len;
  62         char **p, *dst, *src;
  63         static char *buf = NULL;
  64
  65         if (buf == NULL) {
  66                 if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
  67                         errx(1, "sysconf _SC_ARG_MAX failed");
  68                 if ((buf = malloc((4 * arg_max)  +  1)) == NULL)
  69                         errx(1, "malloc failed");
  70         }
  71
  72         if (*argv == 0) {
  73                 buf[0] = 0;
  74                 return (buf);
  75         }
  76         dst = buf;
  77         for (p = argv; (src = *p++) != 0; ) {
  78                 if (*src == 0)
  79                         continue;
  80                 len = (4 * arg_max - (dst - buf)) / 4;
  81                 strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
  82                     VIS_NL | VIS_CSTYLE);
  83                 while (*dst)
  84                         dst++;
  85                 if ((4 * arg_max - (dst - buf)) / 4 > 0)
  86                         *dst++ = ' ';
  87         }
  88         /* Chop off trailing space */
  89         if (dst != buf && dst[-1] == ' ')
  90                 dst--;
  91         *dst = '\0';
  92         return (buf);
  93 }
  94
  95 static char *
  96 cmdpart(char *arg0)
  97 {
  98         char *cp;
  99
 100         return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
 101 }
 102
 103 const char *
 104 fmt_argv(char **argv, char *cmd, int maxlen)
 105 {
 106         int len;
 107         char *ap, *cp;
 108
 109         if (argv == 0 || argv[0] == 0) {
 110                 if (cmd == NULL)
 111                         return ("");
 112                 ap = NULL;
 113                 len = maxlen + 3;
 114         } else {
 115                 ap = shquote(argv);
 116                 len = strlen(ap) + maxlen + 4;
 117         }
 118         if ((cp = malloc(len)) == NULL)
 119                 return (NULL);
 120         if (ap == NULL)
 121                 sprintf(cp, " (%.*s)", maxlen, cmd);
 122         else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
 123                 sprintf(cp, "%s (%.*s)", ap, maxlen, cmd);
 124         else
 125                 strcpy(cp, ap);
 126         return (cp);
 127 }