mirror of
https://github.com/pygos/pkg-utils.git
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70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "command.h"
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extern char *__progname;
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static command_t *commands;
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void command_register(command_t *cmd)
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{
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cmd->next = commands;
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commands = cmd;
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}
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command_t *command_by_name(const char *name)
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{
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command_t *cmd;
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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if (strcmp(cmd->cmd, name) == 0)
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break;
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}
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return cmd;
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}
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void usage(int status)
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{
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FILE *stream = (status == EXIT_SUCCESS ? stdout : stderr);
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int padd = 0, len;
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command_t *cmd;
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fprintf(stream, "usage: %s <command> [args...]\n\n"
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"Available commands:\n\n", __progname);
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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len = strlen(cmd->cmd);
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padd = len > padd ? len : padd;
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}
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for (cmd = commands; cmd != NULL; cmd = cmd->next) {
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fprintf(stream, "%*s - %s\n",
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(int)padd + 1, cmd->cmd, cmd->s_desc);
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}
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fprintf(stream, "\nTry `%s help <command>' for more information "
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"on a specific command\n", __progname);
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exit(status);
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}
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void tell_read_help(const char *cmd)
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{
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fprintf(stderr, "Try `%s help %s' for more information.\n",
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__progname, cmd);
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}
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int check_arguments(const char *cmd, int argc, int minc, int maxc)
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{
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if (argc >= minc && argc <= maxc)
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return 0;
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fprintf(stderr, "Too %s arguments for `%s'\n",
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argc > maxc ? "many" : "few", cmd);
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tell_read_help(cmd);
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return -1;
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}
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