634d96e194
correct manner. Revert my incorrect change to use err(3) for malloc(3) failing. Use a size_t variable to store the size of the argument buffer we allocate, and remove silly casts as the result of having this around. Modify the math in some of the paranoid checks for buffer overflow to account for the fact we now are dealing with the actual size of the buffer. Remove the static qualifier for arg_max, and the bogus setting of it to -1. Include <limits.h> for the definitions we use to check for possible overflows. Submitted by: bde
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94";
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#endif
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <err.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "ps.h"
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static char *cmdpart(char *);
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static char *shquote(char **);
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/*
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* XXX
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* This is a stub until marc does the real one.
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*/
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static char *
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shquote(char **argv)
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{
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long arg_max;
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static size_t buf_size;
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size_t len;
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char **p, *dst, *src;
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static char *buf = NULL;
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if (buf == NULL) {
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if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
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errx(1, "sysconf _SC_ARG_MAX failed");
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if (arg_max >= LONG_MAX / 4 || 4 * arg_max + 1 > SIZE_MAX)
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errx(1, "sysconf _SC_ARG_MAX preposterously large");
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buf_size = 4 * arg_max + 1;
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if ((buf = malloc(buf_size)) == NULL)
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errx(1, "malloc failed");
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}
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if (*argv == 0) {
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buf[0] = 0;
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return (buf);
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}
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dst = buf;
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for (p = argv; (src = *p++) != 0; ) {
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if (*src == 0)
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continue;
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len = (buf_size - 1 - (dst - buf)) / 4;
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strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
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VIS_NL | VIS_CSTYLE);
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while (*dst)
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dst++;
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if ((buf_size - 1 - (dst - buf)) / 4 > 0)
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*dst++ = ' ';
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}
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/* Chop off trailing space */
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if (dst != buf && dst[-1] == ' ')
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dst--;
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*dst = '\0';
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return (buf);
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}
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static char *
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cmdpart(char *arg0)
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{
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char *cp;
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return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
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}
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const char *
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fmt_argv(char **argv, char *cmd, size_t maxlen)
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{
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size_t len;
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char *ap, *cp;
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if (argv == NULL || argv[0] == NULL) {
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if (cmd == NULL)
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return ("");
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ap = NULL;
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len = maxlen + 3;
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} else {
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ap = shquote(argv);
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len = strlen(ap) + maxlen + 4;
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}
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cp = malloc(len);
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if (cp == NULL)
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return (NULL);
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if (ap == NULL)
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sprintf(cp, " (%.*s)", (int)maxlen, cmd);
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else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
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sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd);
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else
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(void) strcpy(cp, ap);
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return (cp);
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}
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