133 lines
3.6 KiB
C
133 lines
3.6 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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* 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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#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/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <stdint.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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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 || arg_max >= (long)(SIZE_MAX / 4))
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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 == NULL) {
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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++) != NULL; ) {
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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 != '\0')
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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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errx(1, "malloc failed");
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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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