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.
48 lines
1.5 KiB
C
48 lines
1.5 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 <stdint.h>
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#include <stdio.h>
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#include <sys/mman.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 shm_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_shm";
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uint32_t *first;
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uint32_t *second;
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int fd;
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int second_fd;
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errno = 0;
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if (shm_unlink(name) < 0 && errno != ENOENT) return fail_step("shm_unlink pre-clean");
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fd = shm_open(name, O_CREAT | O_RDWR, 0666);
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if (fd < 0) return fail_step("shm_open");
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if (ftruncate(fd, 4096) < 0) return fail_step("ftruncate");
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second_fd = shm_open(name, O_RDWR, 0666);
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if (second_fd < 0) return fail_step("shm_open reopen");
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first = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (first == MAP_FAILED) return fail_step("mmap first");
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second = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, second_fd, 0);
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if (second == MAP_FAILED) return fail_step("mmap second");
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*first = 0xDEADBEEFU;
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if (*second != 0xDEADBEEFU) {
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printf("FAIL shm_open: observed=0x%08X\n", *second);
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return 1;
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}
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if (munmap(second, 4096) < 0) return fail_step("munmap second");
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if (munmap(first, 4096) < 0) return fail_step("munmap first");
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if (close(second_fd) < 0) return fail_step("close second");
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if (close(fd) < 0) return fail_step("close");
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if (shm_unlink(name) < 0) return fail_step("shm_unlink");
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printf("PASS shm_open\n");
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return 0;
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}
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