Enrico Fraccaroli (Galfurian)
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/// @file ipcs.c
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/// @brief
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/// @copyright (c) 2014-2023 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#include <sys/unistd.h>
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#include <stdio.h>
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#include <sys/sem.h>
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#include <sys/ipc.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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static inline void __print_file_content(const char *path)
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{
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// Prepare the buffer for reading.
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char buffer[BUFSIZ];
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// Clean the buffer.
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memset(buffer, 0, BUFSIZ);
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// Open the file.
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int fd = open(path, O_RDONLY, 42);
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if (fd >= 0) {
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// Put on the standard output the characters.
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while (read(fd, buffer, BUFSIZ) > 0)
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puts(buffer);
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// Close the file descriptor.
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close(fd);
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}
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}
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int main(int argc, char **argv)
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{
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if (argc > 4)
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return -1;
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// Default operation, prints all ipcs informations.
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if (argc == 1) {
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printf("------ Message Queues --------\n");
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__print_file_content("/proc/ipc/msg");
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printf("------ Semaphore Arrays --------\n");
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__print_file_content("/proc/ipc/sem");
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printf("------ Shared Memory Segments --------\n");
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__print_file_content("/proc/ipc/shm");
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return 0;
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}
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if (argc == 2) {
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if (!strcmp(argv[1], "-q")) { // Show message queues information.
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printf("------ Message Queues --------\n");
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__print_file_content("/proc/ipc/msg");
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} else if (!strcmp(argv[1], "-s")) { // Show semaphores information.
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printf("------ Semaphore Arrays --------\n");
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__print_file_content("/proc/ipc/sem");
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} else if (!strcmp(argv[1], "-m")) { // Show shared memories information.
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printf("------ Shared Memory Segments --------\n");
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__print_file_content("/proc/ipc/shm");
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} else {
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printf("%s: Command not found.", argv[0]);
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return 1;
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}
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return 0;
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}
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if (!strcmp(argv[1], "-i")) {
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// Show details about a specific semaphore.
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if (!strcmp(argv[3], "-s")) {
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struct semid_ds sem;
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union semun temp;
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int semid;
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long ret;
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// Prepare the data structure.
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temp.buf = &sem;
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// Initialize the semid.
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semid = atoi(argv[2]);
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// Retrive the statistics.
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ret = semctl(semid, 0, IPC_STAT, &temp);
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// Check if we succeded.
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if (!ret) {
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printf("key semid owner perms nsems\n");
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printf("%10d %10d %10d %10d %d\n", sem.sem_perm.key, semid, sem.sem_perm.uid, sem.sem_perm.mode, sem.sem_nsems);
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return 0;
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}
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return 1;
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}
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// Show details about a specific shared memory.
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if (!strcmp(argv[3], "-m")) {
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printf("Not Implemented!\n");
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return 0;
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}
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// Show details about a specific message queue.
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if (!strcmp(argv[3], "-q")) {
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printf("Not Implemented!\n");
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return 0;
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}
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printf("%s: Wrong combination, with `-i` you should provide either `-s`, `-m`, or `-q`.", argv[0]);
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return 1;
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}
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printf("%s: Command not found.", argv[0]);
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return 1;
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}
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