1 files changed, 220 insertions, 0 deletions
diff --git a/third_party/rust/libc/src/unix/solarish/compat.rs b/third_party/rust/libc/src/unix/solarish/compat.rs
new file mode 100644
index 0000000000..cbf955a31e
--- /dev/null
+++ b/third_party/rust/libc/src/unix/solarish/compat.rs
@@ -0,0 +1,220 @@
+// Common functions that are unfortunately missing on illumos and
+// Solaris, but often needed by other crates.
+
+use core::cmp::min;
+use unix::solarish::*;
+
+const PTEM: &[u8] = b"ptem\0";
+const LDTERM: &[u8] = b"ldterm\0";
+
+pub unsafe fn cfmakeraw(termios: *mut ::termios) {
+    (*termios).c_iflag &=
+        !(IMAXBEL | IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+    (*termios).c_oflag &= !OPOST;
+    (*termios).c_lflag &= !(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+    (*termios).c_cflag &= !(CSIZE | PARENB);
+    (*termios).c_cflag |= CS8;
+
+    // By default, most software expects a pending read to block until at
+    // least one byte becomes available.  As per termio(7I), this requires
+    // setting the MIN and TIME parameters appropriately.
+    //
+    // As a somewhat unfortunate artefact of history, the MIN and TIME slots
+    // in the control character array overlap with the EOF and EOL slots used
+    // for canonical mode processing.  Because the EOF character needs to be
+    // the ASCII EOT value (aka Control-D), it has the byte value 4.  When
+    // switching to raw mode, this is interpreted as a MIN value of 4; i.e.,
+    // reads will block until at least four bytes have been input.
+    //
+    // Other platforms with a distinct MIN slot like Linux and FreeBSD appear
+    // to default to a MIN value of 1, so we'll force that value here:
+    (*termios).c_cc[VMIN] = 1;
+    (*termios).c_cc[VTIME] = 0;
+}
+
+pub unsafe fn cfsetspeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int {
+    // Neither of these functions on illumos or Solaris actually ever
+    // return an error
+    ::cfsetispeed(termios, speed);
+    ::cfsetospeed(termios, speed);
+    0
+}
+
+unsafe fn bail(fdm: ::c_int, fds: ::c_int) -> ::c_int {
+    let e = *___errno();
+    if fds >= 0 {
+        ::close(fds);
+    }
+    if fdm >= 0 {
+        ::close(fdm);
+    }
+    *___errno() = e;
+    return -1;
+}
+
+pub unsafe fn openpty(
+    amain: *mut ::c_int,
+    asubord: *mut ::c_int,
+    name: *mut ::c_char,
+    termp: *const termios,
+    winp: *const ::winsize,
+) -> ::c_int {
+    // Open the main pseudo-terminal device, making sure not to set it as the
+    // controlling terminal for this process:
+    let fdm = ::posix_openpt(O_RDWR | O_NOCTTY);
+    if fdm < 0 {
+        return -1;
+    }
+
+    // Set permissions and ownership on the subordinate device and unlock it:
+    if ::grantpt(fdm) < 0 || ::unlockpt(fdm) < 0 {
+        return bail(fdm, -1);
+    }
+
+    // Get the path name of the subordinate device:
+    let subordpath = ::ptsname(fdm);
+    if subordpath.is_null() {
+        return bail(fdm, -1);
+    }
+
+    // Open the subordinate device without setting it as the controlling
+    // terminal for this process:
+    let fds = ::open(subordpath, O_RDWR | O_NOCTTY);
+    if fds < 0 {
+        return bail(fdm, -1);
+    }
+
+    // Check if the STREAMS modules are already pushed:
+    let setup = ::ioctl(fds, I_FIND, LDTERM.as_ptr());
+    if setup < 0 {
+        return bail(fdm, fds);
+    } else if setup == 0 {
+        // The line discipline is not present, so push the appropriate STREAMS
+        // modules for the subordinate device:
+        if ::ioctl(fds, I_PUSH, PTEM.as_ptr()) < 0 || ::ioctl(fds, I_PUSH, LDTERM.as_ptr()) < 0 {
+            return bail(fdm, fds);
+        }
+    }
+
+    // If provided, set the terminal parameters:
+    if !termp.is_null() && ::tcsetattr(fds, TCSAFLUSH, termp) != 0 {
+        return bail(fdm, fds);
+    }
+
+    // If provided, set the window size:
+    if !winp.is_null() && ::ioctl(fds, TIOCSWINSZ, winp) < 0 {
+        return bail(fdm, fds);
+    }
+
+    // If the caller wants the name of the subordinate device, copy it out.
+    //
+    // Note that this is a terrible interface: there appears to be no standard
+    // upper bound on the copy length for this pointer.  Nobody should pass
+    // anything but NULL here, preferring instead to use ptsname(3C) directly.
+    if !name.is_null() {
+        ::strcpy(name, subordpath);
+    }
+
+    *amain = fdm;
+    *asubord = fds;
+    0
+}
+
+pub unsafe fn forkpty(
+    amain: *mut ::c_int,
+    name: *mut ::c_char,
+    termp: *const termios,
+    winp: *const ::winsize,
+) -> ::pid_t {
+    let mut fds = -1;
+
+    if openpty(amain, &mut fds, name, termp, winp) != 0 {
+        return -1;
+    }
+
+    let pid = ::fork();
+    if pid < 0 {
+        return bail(*amain, fds);
+    } else if pid > 0 {
+        // In the parent process, we close the subordinate device and return the
+        // process ID of the new child:
+        ::close(fds);
+        return pid;
+    }
+
+    // The rest of this function executes in the child process.
+
+    // Close the main side of the pseudo-terminal pair:
+    ::close(*amain);
+
+    // Use TIOCSCTTY to set the subordinate device as our controlling
+    // terminal.  This will fail (with ENOTTY) if we are not the leader in
+    // our own session, so we call setsid() first.  Finally, arrange for
+    // the pseudo-terminal to occupy the standard I/O descriptors.
+    if ::setsid() < 0
+        || ::ioctl(fds, TIOCSCTTY, 0) < 0
+        || ::dup2(fds, 0) < 0
+        || ::dup2(fds, 1) < 0
+        || ::dup2(fds, 2) < 0
+    {
+        // At this stage there are no particularly good ways to handle failure.
+        // Exit as abruptly as possible, using _exit() to avoid messing with any
+        // state still shared with the parent process.
+        ::_exit(EXIT_FAILURE);
+    }
+    // Close the inherited descriptor, taking care to avoid closing the standard
+    // descriptors by mistake:
+    if fds > 2 {
+        ::close(fds);
+    }
+
+    0
+}
+
+pub unsafe fn getpwent_r(
+    pwd: *mut passwd,
+    buf: *mut ::c_char,
+    buflen: ::size_t,
+    result: *mut *mut passwd,
+) -> ::c_int {
+    let old_errno = *::___errno();
+    *::___errno() = 0;
+    *result = native_getpwent_r(
+        pwd,
+        buf,
+        min(buflen, ::c_int::max_value() as ::size_t) as ::c_int,
+    );
+
+    let ret = if (*result).is_null() {
+        *::___errno()
+    } else {
+        0
+    };
+    *::___errno() = old_errno;
+
+    ret
+}
+
+pub unsafe fn getgrent_r(
+    grp: *mut ::group,
+    buf: *mut ::c_char,
+    buflen: ::size_t,
+    result: *mut *mut ::group,
+) -> ::c_int {
+    let old_errno = *::___errno();
+    *::___errno() = 0;
+    *result = native_getgrent_r(
+        grp,
+        buf,
+        min(buflen, ::c_int::max_value() as ::size_t) as ::c_int,
+    );
+
+    let ret = if (*result).is_null() {
+        *::___errno()
+    } else {
+        0
+    };
+    *::___errno() = old_errno;
+
+    ret
+}