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#include <stdio.h>
#include <string.h>
#include <stdint.h>
static void help(void)
{
puts("A simple implementation of a shell for testing termopen().");
puts("");
puts("Usage:");
puts(" shell-test --help");
puts(" Prints this help to stdout.");
puts(" shell-test");
puts(" shell-test EXE");
puts(" Prints \"ready $ \" to stderr.");
puts(" shell-test EXE \"prog args...\"");
puts(" Prints \"ready $ prog args...\\n\" to stderr.");
puts(" shell-test REP {byte} \"line line line\"");
puts(" Prints \"{lnr}: line line line\\n\" to stdout {byte} times.");
puts(" I.e. for `shell-test REP ab \"test\"'");
puts(" 0: test");
puts(" ...");
puts(" 96: test");
puts(" will be printed because byte `a' is equal to 97.");
}
int main(int argc, char **argv)
{
if (argc == 2 && strcmp(argv[1], "--help") == 0) {
help();
}
if (argc >= 2) {
if (strcmp(argv[1], "EXE") == 0) {
fprintf(stderr, "ready $ ");
if (argc >= 3) {
fprintf(stderr, "%s\n", argv[2]);
}
} else if (strcmp(argv[1], "REP") == 0) {
if (argc < 4) {
fprintf(stderr, "Not enough REP arguments\n");
return 4;
}
uint8_t number = (uint8_t) *argv[2];
for (uint8_t i = 0; i < number; i++) {
printf("%d: %s\n", (int) i, argv[3]);
}
} else {
fprintf(stderr, "Unknown first argument\n");
return 3;
}
return 0;
} else if (argc == 1) {
fprintf(stderr, "ready $ ");
return 0;
} else {
fprintf(stderr, "Missing first argument\n");
return 2;
}
}
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