mirror of
https://github.com/pygos/init.git
synced 2024-11-16 16:57:09 +01:00
113 lines
2 KiB
C
113 lines
2 KiB
C
/* SPDX-License-Identifier: ISC */
|
|
#include "servicecmd.h"
|
|
|
|
extern char *__progname;
|
|
|
|
static void pretty_print(const char *str, int padd, int len)
|
|
{
|
|
int i, brk;
|
|
next:
|
|
while (isspace(*str) && *str != '\n')
|
|
++str;
|
|
|
|
if (!(*str))
|
|
return;
|
|
|
|
if (*str == '\n') {
|
|
fputc('\n', stdout);
|
|
++str;
|
|
len = padd;
|
|
goto next;
|
|
}
|
|
|
|
for (i = 0, brk = 0; str[i]; ++i) {
|
|
if (str[i] == '<' || str[i] == '[')
|
|
++brk;
|
|
if (str[i] == '>' || str[i] == ']')
|
|
--brk;
|
|
if (!brk && isspace(str[i]))
|
|
break;
|
|
}
|
|
|
|
if ((len + i) < 80) {
|
|
fwrite(str, 1, i, stdout);
|
|
str += i;
|
|
len += i;
|
|
|
|
if ((len + 1) < 80) {
|
|
fputc(' ', stdout);
|
|
++len;
|
|
goto next;
|
|
}
|
|
}
|
|
|
|
printf("\n%*s", padd, "");
|
|
len = padd;
|
|
goto next;
|
|
}
|
|
|
|
static void print_cmd_usage(const char *cmd, const char *usage)
|
|
{
|
|
int padd;
|
|
|
|
padd = printf("Usage: %s %s ", __progname, cmd);
|
|
|
|
if ((strlen(usage) + padd) < 80) {
|
|
fputs(usage, stdout);
|
|
return;
|
|
}
|
|
|
|
pretty_print(usage, padd, padd);
|
|
}
|
|
|
|
static int cmd_help(int argc, char **argv)
|
|
{
|
|
const char *help;
|
|
command_t *cmd;
|
|
|
|
if (argc < 2)
|
|
usage(EXIT_SUCCESS);
|
|
|
|
if (argc > 2) {
|
|
fprintf(stderr, "Too many arguments\n\n"
|
|
"Usage: %s help <command>", __progname);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
for (cmd = commands; cmd != NULL; cmd = cmd->next) {
|
|
if (strcmp(cmd->cmd, argv[1]) != 0)
|
|
continue;
|
|
|
|
print_cmd_usage(cmd->cmd, cmd->usage);
|
|
fputs("\n\n", stdout);
|
|
|
|
help = cmd->l_desc ? cmd->l_desc : cmd->s_desc;
|
|
|
|
if (islower(*help)) {
|
|
fputc(toupper(*(help++)), stdout);
|
|
pretty_print(help, 0, 1);
|
|
} else {
|
|
pretty_print(help, 0, 0);
|
|
}
|
|
|
|
fputc('\n', stdout);
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
fprintf(stderr, "Unknown command '%s'\n\n"
|
|
"Try `%s help' for a list of available commands\n",
|
|
argv[1], __progname);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
static command_t help = {
|
|
.cmd = "help",
|
|
.usage = "<command>",
|
|
.s_desc = "print a help text for a command",
|
|
.l_desc = "Print a help text for a specified command. If no command "
|
|
"is specified, print a generic help text and a list of "
|
|
"available commands.",
|
|
.run_cmd = cmd_help,
|
|
};
|
|
|
|
REGISTER_COMMAND(help)
|