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/* This is free and unencumbered software released into the public domain. */
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define OPTPARSE_IMPLEMENTATION
#include "../optparse.h"
static int cmd_echo(char **argv)
{
int i, option;
bool newline = true;
struct optparse options;
optparse_init(&options, argv);
options.permute = 0;
while ((option = optparse(&options, "hn")) != -1) {
switch (option) {
case 'h':
puts("usage: echo [-hn] [ARG]...");
return 0;
case 'n':
newline = false;
break;
case '?':
fprintf(stderr, "%s: %s\n", argv[0], options.errmsg);
return 1;
}
}
argv += options.optind;
for (i = 0; argv[i]; i++) {
printf("%s%s", i ? " " : "", argv[i]);
}
if (newline) {
putchar('\n');
}
fflush(stdout);
return !!ferror(stdout);
}
static int cmd_sleep(char **argv)
{
int i, option;
struct optparse options;
optparse_init(&options, argv);
while ((option = optparse(&options, "h")) != -1) {
switch (option) {
case 'h':
puts("usage: sleep [-h] [NUMBER]...");
return 0;
case '?':
fprintf(stderr, "%s: %s\n", argv[0], options.errmsg);
return 1;
}
}
for (i = 0; argv[i]; i++) {
if (sleep(atoi(argv[i]))) {
return 1;
}
}
return 0;
}
static void
usage(FILE *f)
{
fprintf(f, "usage: example [-h] <echo|sleep> [OPTION]...\n");
}
int main(int argc, char **argv)
{
int i, option;
char **subargv;
struct optparse options;
static const struct {
char name[8];
int (*cmd)(char **);
} cmds[] = {
{"echo", cmd_echo },
{"sleep", cmd_sleep},
};
int ncmds = sizeof(cmds) / sizeof(*cmds);
(void)argc;
optparse_init(&options, argv);
options.permute = 0;
while ((option = optparse(&options, "h")) != -1) {
switch (option) {
case 'h':
usage(stdout);
return 0;
case '?':
usage(stderr);
fprintf(stderr, "%s: %s\n", argv[0], options.errmsg);
return 1;
}
}
subargv = argv + options.optind;
if (!subargv[0]) {
fprintf(stderr, "%s: missing subcommand\n", argv[0]);
usage(stderr);
return 1;
}
for (i = 0; i < ncmds; i++) {
if (!strcmp(cmds[i].name, subargv[0])) {
return cmds[i].cmd(subargv);
}
}
fprintf(stderr, "%s: invalid subcommand: %s\n", argv[0], subargv[0]);
return 1;
}
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