int main(int argc, char* argv[]) {
const size_t MAX_ARRAY_SIZE = 100000;
size_t numbers[MAX_ARRAY_SIZE];
size_t counter = 0;
int NumberOfInts = 0;
for(counter = 0; counter < MAX_ARRAY_SIZE; ++counter) {
numbers[counter] = 0;
}
if(argc != 2) {
printf("usage sortrandom NUMBER\n");
exit(EXIT_FAILURE);
}
sscanf(argv[1], "%d", &NumberOfInts);
if(( NumberOfInts <= 0) || (NumberOfInts >= (MAX_ARRAY_SIZE + 1))) {
printf("usage sortrandom NUMBER\n");
printf("NUMBER must between 1 and %li\n", MAX_ARRAY_SIZE);
exit(EXIT_FAILURE);
}
#ifdef PRINTRANDOM
printrandoms(numbers, NumberOfInts);
#endif
mkrandom(numbers, NumberOfInts);
#ifdef PRINTRANDOM
printrandoms(numbers, NumberOfInts);
#endif
if(NumberOfInts > 2) {
/* A single number is already sorted */
sort(numbers, NumberOfInts);
}
#ifdef PRINTRANDOM
printf("\n");
printrandoms(numbers, NumberOfInts);
#endif
exit(EXIT_SUCCESS);
}
int main(int argc, char ** argv) {
if (argc < 2) {
fprintf(stderr,
"%s: message queue tool for the prll() shell function.\n"
"Consult the prll source and documentation for usage.\n"
"Not meant to be used standalone.\n"
, argv[0]);
return 1;
}
// Choosing operating mode
enum {
PRLL_CLIENT_MODE, PRLL_REMOVE_MODE,
PRLL_GETONE_MODE, PRLL_CREATE_MODE,
PRLL_TEST_MODE
} mode;
if (argv[1][0] == '\0')
goto arg_err;
if (argv[1][0] == 'r' && argv[1][1] == '\0')
mode = PRLL_REMOVE_MODE;
else if (argv[1][0] == 'c' && argv[1][1] == '\0')
mode = PRLL_CLIENT_MODE;
else if (argv[1][0] == 'o' && argv[1][1] == '\0')
mode = PRLL_GETONE_MODE;
else if (argv[1][0] == 'n' && argv[1][1] == '\0')
mode = PRLL_CREATE_MODE;
else if (argv[1][0] == 't' && argv[1][1] == '\0')
mode = PRLL_TEST_MODE;
else if (argv[1][0] == 'P' && argv[1][1] == '\0') {
if (argc < 3) {
fprintf(stderr, "%s: Not enough parameters.\n", argv[0]);
return 1;
}
FILE* out = fopen(argv[2], "w");
if (!out) {
fprintf(stderr, "%s: Could not open tasks file.\n", argv[0]);
return 1;
}
fprintf(out, "%lld\n", (long long)getppid());
fclose(out);
return 0;
} else {
arg_err:
fprintf(stderr, "%s: Incorrect mode specification: %s\n", argv[0], argv[1]);
return 1;
}
// Open the message queue and prepare the variable for the message
key_t qkey;
int qid;
if (mode != PRLL_CREATE_MODE) {
if (argc < 3) {
fprintf(stderr, "%s: Not enough parameters.\n", argv[0]);
return 1;
}
qkey = strtoumax(argv[2], 0, 0);
qid = msgget(qkey, 0);
if (qid == -1 || qkey == 0) {
if (mode != PRLL_TEST_MODE && mode != PRLL_REMOVE_MODE) {
fprintf(stderr, "%s: Couldn't open the message queue.\n", argv[0]);
perror(argv[0]);
}
return 1;
} else if (mode == PRLL_TEST_MODE)
return 0;
}
struct { long msgtype; char jarg; } msg;
const long msgtype = 'm'+'a'+'p'+'p'; // arbitrary
// Do the work
// CLIENT (SEND A SINGLE MESSAGE) MODE
if (mode == PRLL_CLIENT_MODE) {
if (argc < 4) {
fprintf(stderr, "%s: Not enough parameters.\n", argv[0]);
return 1;
}
msg.msgtype = msgtype;
msg.jarg = strtol(argv[3], 0, 0);
if (errno) abrterr();
if (msgsnd(qid, &msg, sizeof(msg.jarg), 0)) abrterr();
// GET A SINGLE MESSAGE MODE
} else if (mode == PRLL_GETONE_MODE) {
if (msgrcv(qid, &msg, sizeof(msg.jarg), msgtype, 0) != sizeof(msg.jarg)) {
perror(argv[0]);
}
if (msg.jarg == 0) {
return 0;
} else if (msg.jarg == 1) {
return 1;
} else abrterr2("Unknown command.");
// CREATE A NEW QUEUE MODE
} else if (mode == PRLL_CREATE_MODE) {
do {
if (mkrandom(&qkey)) abrterr2("Error accessing /dev/(u)random.");
} while (-1 == (qid = msgget(qkey, 0600 | IPC_CREAT | IPC_EXCL))
&& errno == EEXIST);
if (qid == -1) abrterr();
printf("%#" PRIXMAX "\n", (uintmax_t)qkey);
// REMOVE MODE
} else if (mode == PRLL_REMOVE_MODE) {
if (msgctl(qid, IPC_RMID, NULL)) abrterr();
}
return 0;
}
