#include <sys/cdefs.h>
#if 0
#ifndef lint
static char sccsid[] = "@(#)fmt.c 8.4 (Berkeley) 4/15/94";
#endif
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>
static char *cmdpart(char *);
static char *shquote(char **);
static char *
shquote(char **argv)
{
static long arg_max = -1;
size_t len;
char **p, *dst, *src;
static char *buf = NULL;
if (buf == NULL) {
if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
errx(1, "sysconf _SC_ARG_MAX failed");
if ((buf = malloc((u_int)(4 * arg_max) + 1)) == NULL)
errx(1, "malloc failed");
}
if (*argv == 0) {
buf[0] = 0;
return (buf);
}
dst = buf;
for (p = argv; (src = *p++) != 0; ) {
if (*src == 0)
continue;
len = (size_t)(4 * arg_max - (dst - buf)) / 4;
strvisx(dst, src, strlen(src) < len ? strlen(src) : len,
VIS_NL | VIS_CSTYLE);
while (*dst)
dst++;
if ((4 * arg_max - (dst - buf)) / 4 > 0)
*dst++ = ' ';
}
if (dst != buf && dst[-1] == ' ')
dst--;
*dst = '\0';
return (buf);
}
static char *
cmdpart(char *arg0)
{
char *cp;
return ((cp = strrchr(arg0, '/')) != NULL ? cp + 1 : arg0);
}
const char *
fmt_argv(char **argv, char *cmd, size_t maxlen)
{
size_t len;
char *ap, *cp;
if (argv == NULL || argv[0] == NULL) {
if (cmd == NULL)
return ("");
ap = NULL;
len = maxlen + 3;
} else {
ap = shquote(argv);
len = strlen(ap) + maxlen + 4;
}
cp = malloc(len);
if (cp == NULL)
return (NULL);
if (ap == NULL)
sprintf(cp, " (%.*s)", (int)maxlen, cmd);
else if (strncmp(cmdpart(argv[0]), cmd, maxlen) != 0)
sprintf(cp, "%s (%.*s)", ap, (int)maxlen, cmd);
else
(void) strcpy(cp, ap);
return (cp);
}