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/*
* Output command-line help to stdout.
*
* Copyright 2012 Andrew Wood, distributed under the Artistic License 2.0.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define N_(String) (String)
struct optdesc_s {
char *optshort;
char *optlong;
char *param;
char *description;
};
/*
* Display command-line help.
*/
void display_help(void)
{
struct optdesc_s optlist[] = {
{"-p", "--progress", 0,
N_("show progress bar")},
{"-t", "--timer", 0,
N_("show elapsed time")},
{"-e", "--eta", 0,
N_("show estimated time of arrival (completion)")},
{"-r", "--rate", 0,
N_("show data transfer rate counter")},
{"-a", "--average-rate", 0,
N_("show data transfer average rate counter")},
{"-b", "--bytes", 0,
N_("show number of bytes transferred")},
{"-f", "--force", 0,
N_("output even if standard error is not a terminal")},
{"-n", "--numeric", 0,
N_("output percentages, not visual information")},
{"-q", "--quiet", 0,
N_("do not output any transfer information at all")},
{"-c", "--cursor", 0,
N_("use cursor positioning escape sequences")},
{"-W", "--wait", 0,
N_("display nothing until first byte transferred")},
{"-s", "--size", N_("SIZE"),
N_("set estimated data size to SIZE bytes")},
{"-l", "--line-mode", 0,
N_("count lines instead of bytes")},
{"-i", "--interval", N_("SEC"),
N_("update every SEC seconds")},
{"-w", "--width", N_("WIDTH"),
N_("assume terminal is WIDTH characters wide")},
{"-H", "--height", N_("HEIGHT"),
N_("assume terminal is HEIGHT rows high")},
{"-N", "--name", N_("NAME"),
N_("prefix visual information with NAME")},
{"", 0, 0, 0},
{"-L", "--rate-limit", N_("RATE"),
N_("limit transfer to RATE bytes per second")},
{"-B", "--buffer-size", N_("BYTES"),
N_("use a buffer size of BYTES")},
{"-R", "--remote", N_("PID"),
N_("update settings of process PID")},
{"", 0, 0, 0},
{"-h", "--help", 0,
N_("show this help and exit")},
{"-V", "--version", 0,
N_("show version information and exit")},
{0, 0, 0, 0}
};
int i, col1max = 0, tw = 77;
char *optbuf;
printf(_("Usage: %s [OPTION] [FILE]..."), /* RATS: ignore */
PROGRAM_NAME);
printf("\n%s\n\n",
_
("Concatenate FILE(s), or standard input, to standard output,\n"
"with monitoring."));
for (i = 0; optlist[i].optshort; i++) {
int width = 0;
char *param;
width = 2 + strlen(optlist[i].optshort); /* RATS: ignore */
#ifdef HAVE_GETOPT_LONG
if (optlist[i].optlong)
width += 2 + strlen(optlist[i].optlong); /* RATS: ignore */
#endif
param = optlist[i].param;
if (param)
param = _(param);
if (param)
width += 1 + strlen(param); /* RATS: ignore */
if (width > col1max)
col1max = width;
}
col1max++;
optbuf = malloc(col1max + 16);
if (optbuf == NULL) {
fprintf(stderr, "%s: %s\n", PROGRAM_NAME, strerror(errno));
exit(1);
}
for (i = 0; optlist[i].optshort; i++) {
char *param;
char *description;
char *start;
char *end;
if (optlist[i].optshort[0] == 0) {
printf("\n");
continue;
}
param = optlist[i].param;
if (param)
param = _(param);
description = optlist[i].description;
if (description)
description = _(description);
sprintf(optbuf, "%s%s%s%s%s", /* RATS: ignore (checked) */
optlist[i].optshort,
#ifdef HAVE_GETOPT_LONG
optlist[i].optlong ? ", " : "",
optlist[i].optlong ? optlist[i].optlong : "",
#else
"", "",
#endif
param ? " " : "", param ? param : "");
printf(" %-*s ", col1max - 2, optbuf);
if (description == NULL) {
printf("\n");
continue;
}
start = description;
while (strlen(start) /* RATS: ignore */ >tw - col1max) {
end = start + tw - col1max;
while ((end > start) && (end[0] != ' '))
end--;
if (end == start) {
end = start + tw - col1max;
} else {
end++;
}
printf("%.*s\n%*s ", (int) (end - start), start,
col1max, "");
if (end == start)
end++;
start = end;
}
printf("%s\n", start);
}
printf("\n");
printf(_("Please report any bugs to %s."), /* RATS: ignore */
BUG_REPORTS_TO);
printf("\n");
}
/* EOF */
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