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Add CLOEXEC and NONBLOCK to pipe2 #99

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Merged
Arshia001 merged 2 commits into from
Feb 13, 2026
Merged

Add CLOEXEC and NONBLOCK to pipe2 #99

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8e9187a
Add CLOEXEC and NONBLOCK to pipe2
zebreus Feb 12, 2026
2d9d7f7
Update libc-bottom-half/cloudlibc/src/libc/unistd/pipe2.c
zebreus Feb 12, 2026
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34 changes: 33 additions & 1 deletion libc-bottom-half/cloudlibc/src/libc/unistd/pipe2.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
#include <wasi/api.h>
#include <wasi/libc.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

int pipe2(int fd[2], int flag)
Expand All @@ -12,7 +13,38 @@ int pipe2(int fd[2], int flag)
errno = error;
return -1;
}
fd[0] = fd1;

// Set flags if requested
if (flag & O_CLOEXEC) {
if (fcntl(fd1, F_SETFD, FD_CLOEXEC) < 0 || fcntl(fd2, F_SETFD, FD_CLOEXEC) < 0) {
int saved_errno = errno;
close(fd1);
close(fd2);
errno = saved_errno;
return -1;
}
}
if (flag & O_NONBLOCK) {
int flags1 = fcntl(fd1, F_GETFL);
int flags2 = fcntl(fd2, F_GETFL);
if (flags1 < 0 || flags2 < 0) {
int saved_errno = errno;
close(fd1);
close(fd2);
errno = saved_errno;
return -1;
}
if (fcntl(fd1, F_SETFL, flags1 | O_NONBLOCK) < 0 ||
fcntl(fd2, F_SETFL, flags2 | O_NONBLOCK) < 0) {
int saved_errno = errno;
close(fd1);
close(fd2);
errno = saved_errno;
return -1;
}
}

fd[0] = fd1;
fd[1] = fd2;
return 0;
}