vasilito
8acc73d774
Phase 1 (Runtime Substrate): 4 check binaries, --probe, POSIX tests Phase 2 (Wayland Compositor): bounded scaffold, zero warnings Phase 3 (KWin Session): preflight checker (KWin stub, gated on Qt6Quick) Phase 4 (KDE Plasma): 18 KF6 enabled, preflight checker Phase 5 (Hardware GPU): DRM/firmware/Mesa preflight checker Build: zero warnings, all scripts syntax-clean. Oracle-verified.
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
#define _GNU_SOURCE 1
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#include <errno.h>
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#include <fcntl.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <unistd.h>
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static int fail_step(const char *step) {
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printf("FAIL sem_open: %s (errno=%d)\n", step, errno);
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return 1;
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}
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int main(void) {
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static const char name[] = "/rb_test_sem";
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char go = 'G';
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char ready = 0;
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int child_value = -1;
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int parent_value = -1;
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int parent_to_child[2];
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int value = -1;
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int sync_pipe[2];
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int status;
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sem_t *sem;
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pid_t child;
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errno = 0;
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if (sem_unlink(name) < 0 && errno != ENOENT) return fail_step("sem_unlink pre-clean");
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sem = sem_open(name, O_CREAT, 0666, 0);
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if (sem == SEM_FAILED) return fail_step("sem_open create");
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if (sem_getvalue(sem, &value) < 0 || value != 0) {
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printf("FAIL sem_open: initial value=%d\n", value);
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return 1;
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}
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if (pipe(sync_pipe) < 0) return fail_step("pipe");
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if (pipe(parent_to_child) < 0) return fail_step("pipe parent_to_child");
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child = fork();
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if (child < 0) return fail_step("fork");
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if (child == 0) {
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ready = 'R';
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close(sync_pipe[0]);
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close(parent_to_child[1]);
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sem_t *child_sem = sem_open(name, 0);
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if (child_sem == SEM_FAILED) _Exit(1);
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if (write(sync_pipe[1], &ready, 1) != 1) _Exit(2);
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if (read(parent_to_child[0], &go, 1) != 1) _Exit(3);
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if (sem_wait(child_sem) < 0) _Exit(4);
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if (sem_getvalue(child_sem, &child_value) < 0 || child_value != 0) _Exit(5);
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if (sem_post(child_sem) < 0) _Exit(6);
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if (sem_getvalue(child_sem, &child_value) < 0 || child_value != 1) _Exit(7);
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if (sem_close(child_sem) < 0) _Exit(8);
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close(parent_to_child[0]);
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close(sync_pipe[1]);
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_Exit(0);
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}
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close(sync_pipe[1]);
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close(parent_to_child[0]);
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if (read(sync_pipe[0], &ready, 1) != 1) return fail_step("child ready read");
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if (sem_post(sem) < 0) return fail_step("parent sem_post");
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if (sem_getvalue(sem, &parent_value) < 0 || parent_value != 1) {
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printf("FAIL sem_open: post value=%d\n", parent_value);
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return 1;
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}
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if (write(parent_to_child[1], &go, 1) != 1) return fail_step("release child");
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if (close(parent_to_child[1]) < 0) return fail_step("close parent_to_child");
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if (read(sync_pipe[0], &ready, 1) != 0) return fail_step("child completion pipe");
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if (sem_getvalue(sem, &parent_value) < 0 || parent_value != 1) {
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printf("FAIL sem_open: child post value=%d\n", parent_value);
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return 1;
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}
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close(sync_pipe[0]);
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if (sem_wait(sem) < 0) return fail_step("parent sem_wait");
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if (waitpid(child, &status, 0) < 0) return fail_step("waitpid");
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
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printf("FAIL sem_open: child status=%d\n", status);
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return 1;
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}
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if (sem_getvalue(sem, &value) < 0 || value != 0) {
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printf("FAIL sem_open: final value=%d\n", value);
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return 1;
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}
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if (sem_close(sem) < 0 || sem_unlink(name) < 0) return fail_step("cleanup");
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printf("PASS sem_open\n");
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return 0;
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}
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