Add functionality for running external programs to the std lib
See lib/run_program.rs.
This commit is contained in:
parent
441697ab35
commit
ea5dc54c3f
10 changed files with 280 additions and 9 deletions
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@ -255,6 +255,7 @@ RUNTIME_CS := rt/sync/timer.cpp \
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rt/sync/lock_and_signal.cpp \
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rt/rust.cpp \
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rt/rust_builtin.cpp \
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rt/rust_run_program.cpp \
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rt/rust_crate.cpp \
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rt/rust_crate_cache.cpp \
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rt/rust_crate_reader.cpp \
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@ -17,6 +17,8 @@ type reader =
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impure fn read_bytes(uint len) -> vec[u8];
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impure fn read_char() -> int;
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impure fn unread_char(int i);
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impure fn eof() -> bool;
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impure fn read_line() -> str;
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impure fn read_c_str() -> str;
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impure fn read_le_uint(uint size) -> uint;
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impure fn read_le_int(uint size) -> int;
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@ -31,7 +33,7 @@ state obj FILE_reader(os.libc.FILE f, bool must_close) {
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impure fn read_bytes(uint len) -> vec[u8] {
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auto buf = _vec.alloc[u8](len);
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auto read = os.libc.fread(_vec.buf[u8](buf), 1u, len, f);
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check(read == len);
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_vec.len_set[u8](buf, read);
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ret buf;
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}
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impure fn read_char() -> int {
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@ -40,6 +42,21 @@ state obj FILE_reader(os.libc.FILE f, bool must_close) {
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impure fn unread_char(int ch) {
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os.libc.ungetc(ch, f);
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}
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impure fn eof() -> bool {
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auto ch = os.libc.fgetc(f);
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if (ch == -1) {ret true;}
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os.libc.ungetc(ch, f);
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ret false;
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}
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impure fn read_line() -> str {
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auto buf = "";
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while (true) {
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auto ch = os.libc.fgetc(f);
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if (ch == -1) {break;} if (ch == 10) {break;}
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buf += _str.unsafe_from_bytes(vec(ch as u8));
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}
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ret buf;
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}
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impure fn read_c_str() -> str {
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auto buf = "";
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while (true) {
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@ -1,6 +1,9 @@
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import _str.sbuf;
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import _vec.vbuf;
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// FIXE Somehow merge stuff duplicated here and macosx_os.rs. Made difficult
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// by https://github.com/graydon/rust/issues#issue/268
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native mod libc = "libc.so.6" {
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fn open(sbuf s, int flags, uint mode) -> int;
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@ -10,6 +13,7 @@ native mod libc = "libc.so.6" {
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type FILE;
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fn fopen(sbuf path, sbuf mode) -> FILE;
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fn fdopen(int fd, sbuf mode) -> FILE;
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fn fclose(FILE f);
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fn fgetc(FILE f) -> int;
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fn ungetc(int c, FILE f);
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@ -25,6 +29,9 @@ native mod libc = "libc.so.6" {
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fn getenv(sbuf n) -> sbuf;
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fn setenv(sbuf n, sbuf v, int overwrite) -> int;
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fn unsetenv(sbuf n) -> int;
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fn pipe(vbuf buf) -> int;
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fn waitpid(int pid, vbuf status, int options) -> int;
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}
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mod libc_constants {
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@ -50,6 +57,22 @@ fn target_os() -> str {
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ret "linux";
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}
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fn pipe() -> tup(int, int) {
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let vec[mutable int] fds = vec(mutable 0, 0);
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check(os.libc.pipe(_vec.buf[mutable int](fds)) == 0);
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ret tup(fds.(0), fds.(1));
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}
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fn fd_FILE(int fd) -> libc.FILE {
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ret libc.fdopen(fd, _str.buf("r"));
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}
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fn waitpid(int pid) -> int {
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let vec[mutable int] status = vec(mutable 0);
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check(os.libc.waitpid(pid, _vec.buf[mutable int](status), 0) != -1);
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ret status.(0);
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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@ -9,6 +9,7 @@ native mod libc = "libc.dylib" {
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type FILE;
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fn fopen(sbuf path, sbuf mode) -> FILE;
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fn fdopen(int fd, sbuf mode) -> FILE;
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fn fclose(FILE f);
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fn fgetc(FILE f) -> int;
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fn ungetc(int c, FILE f);
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@ -24,6 +25,9 @@ native mod libc = "libc.dylib" {
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fn getenv(sbuf n) -> sbuf;
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fn setenv(sbuf n, sbuf v, int overwrite) -> int;
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fn unsetenv(sbuf n) -> int;
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fn pipe(vbuf buf) -> int;
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fn waitpid(int pid, vbuf status, int options) -> int;
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}
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mod libc_constants {
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@ -49,6 +53,22 @@ fn target_os() -> str {
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ret "macos";
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}
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fn pipe() -> tup(int, int) {
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let vec[mutable int] fds = vec(mutable 0, 0);
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check(os.libc.pipe(_vec.buf[mutable int](fds)) == 0);
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ret tup(fds.(0), fds.(1));
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}
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fn fd_FILE(int fd) -> libc.FILE {
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ret libc.fdopen(fd, _str.buf("r"));
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}
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fn waitpid(int pid) -> int {
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let vec[mutable int] status = vec(mutable 0);
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check(os.libc.waitpid(pid, _vec.buf[mutable int](status), 0) != -1);
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ret status.(0);
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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96
src/lib/run_program.rs
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96
src/lib/run_program.rs
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@ -0,0 +1,96 @@
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import _str.sbuf;
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import _vec.vbuf;
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native "rust" mod rustrt {
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fn rust_run_program(vbuf argv, int in_fd, int out_fd, int err_fd) -> int;
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}
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fn argvec(str prog, vec[str] args) -> vec[sbuf] {
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auto argptrs = vec(_str.buf(prog));
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for (str arg in args) {
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argptrs = _vec.push[sbuf](argptrs, _str.buf(arg));
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}
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argptrs = _vec.push[sbuf](argptrs, 0 as sbuf);
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ret argptrs;
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}
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impure fn run_program(str prog, vec[str] args) -> int {
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auto pid = rustrt.rust_run_program(_vec.buf[sbuf](argvec(prog, args)),
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0, 0, 0);
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ret os.waitpid(pid);
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}
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type program =
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state obj {
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fn get_id() -> int;
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fn input() -> io.writer;
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fn output() -> io.reader;
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impure fn close_input();
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impure fn finish() -> int;
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};
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impure fn start_program(str prog, vec[str] args) -> @program {
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auto pipe_input = os.pipe();
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auto pipe_output = os.pipe();
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auto pid = rustrt.rust_run_program
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(_vec.buf[sbuf](argvec(prog, args)),
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pipe_input._0, pipe_output._1, 0);
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if (pid == -1) {fail;}
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os.libc.close(pipe_input._0);
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os.libc.close(pipe_output._1);
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state obj new_program(int pid,
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int in_fd,
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os.libc.FILE out_file,
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mutable bool finished) {
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fn get_id() -> int {ret pid;}
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fn input() -> io.writer {
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ret io.new_writer(io.fd_buf_writer(in_fd, false));
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}
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fn output() -> io.reader {
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ret io.FILE_reader(out_file, false);
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}
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impure fn close_input() {
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os.libc.close(in_fd);
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}
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impure fn finish() -> int {
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if (finished) {ret 0;}
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finished = true;
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os.libc.close(in_fd);
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ret os.waitpid(pid);
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}
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drop {
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if (!finished) {
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os.libc.close(in_fd);
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os.waitpid(pid);
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}
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os.libc.fclose(out_file);
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}
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}
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ret @new_program(pid, pipe_input._1,
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os.fd_FILE(pipe_output._0),
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false);
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}
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impure fn program_output(str prog, vec[str] args)
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-> rec(int status, str out) {
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auto pr = start_program(prog, args);
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pr.close_input();
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auto out = pr.output();
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auto buf = "";
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while (!out.eof()) {
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auto bytes = out.read_bytes(4096u);
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buf += _str.unsafe_from_bytes(bytes);
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}
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ret rec(status=pr.finish(), out=buf);
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}
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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@ -27,7 +27,9 @@ mod util;
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auth io = unsafe;
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auth fs = unsafe;
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auth os = unsafe;
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auth os_fs = unsafe;
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auth run = unsafe;
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auth _str = unsafe;
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auth _vec = unsafe;
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auth _task = unsafe;
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@ -52,9 +54,9 @@ alt (target_os) {
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mod os_fs = "posix_fs.rs";
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}
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}
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mod run = "run_program.rs";
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mod fs;
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// FIXME: parametric
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mod map;
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mod deque;
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@ -9,11 +9,14 @@ native mod libc = "msvcrt.dll" {
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type FILE;
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fn fopen(sbuf path, sbuf mode) -> FILE;
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fn _fdopen(int fd, sbuf mode) -> FILE;
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fn fclose(FILE f);
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fn fgetc(FILE f) -> int;
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fn ungetc(int c, FILE f);
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fn fread(vbuf buf, uint size, uint n, FILE f) -> uint;
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fn fseek(FILE f, int offset, int whence) -> int;
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fn _pipe(vbuf fds, uint size, int mode) -> int;
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}
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mod libc_constants {
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ret "win32";
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}
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fn pipe() -> tup(int, int) {
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let vec[mutable int] fds = vec(mutable 0, 0);
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check(os.libc._pipe(_vec.buf[mutable int](fds), 1024u,
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libc_constants.O_BINARY()) == 0);
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ret tup(fds.(0), fds.(1));
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}
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fn fd_FILE(int fd) -> libc.FILE {
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ret libc._fdopen(fd, _str.buf("r"));
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}
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native "rust" mod rustrt {
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fn rust_process_wait(int handle) -> int;
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}
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fn waitpid(int pid) -> int {
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ret rustrt.rust_process_wait(pid);
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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@ -1,7 +1,4 @@
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "rust_internal.h"
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/* Native builtins. */
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@ -11,9 +11,12 @@
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#include <stdint.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include "rust.h"
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#include "rand.h"
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#include "uthash.h"
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}
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#elif defined(__GNUC__)
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <pthread.h>
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#include <errno.h>
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#include <dirent.h>
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#else
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#error "Platform not supported."
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#endif
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92
src/rt/rust_run_program.cpp
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92
src/rt/rust_run_program.cpp
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#include "rust_internal.h"
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#if defined(__WIN32__)
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#include <process.h>
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#include <io.h>
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extern "C" CDECL int
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rust_run_program(void* task, const char* argv[],
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int in_fd, int out_fd, int err_fd) {
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STARTUPINFO si;
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ZeroMemory(&si, sizeof(STARTUPINFO));
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si.cb = sizeof(STARTUPINFO);
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si.dwFlags = STARTF_USESTDHANDLES;
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si.hStdInput = (HANDLE)_get_osfhandle(in_fd ? in_fd : 0);
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si.hStdOutput = (HANDLE)_get_osfhandle(out_fd ? out_fd : 1);
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si.hStdError = (HANDLE)_get_osfhandle(err_fd ? err_fd : 2);
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size_t cmd_len = 0;
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for (const char** arg = argv; *arg; arg++) {
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cmd_len += strlen(*arg);
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cmd_len++; // Space or \0
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}
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char* cmd = (char*)malloc(cmd_len);
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char* pos = cmd;
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for (const char** arg = argv; *arg; arg++) {
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strcpy(pos, *arg);
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pos += strlen(*arg);
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if (*(arg+1)) *(pos++) = ' ';
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}
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PROCESS_INFORMATION pi;
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BOOL created = CreateProcess(NULL, cmd, NULL, NULL, TRUE,
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0, NULL, NULL, &si, &pi);
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free(cmd);
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if (!created) return -1;
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return (int)pi.hProcess;
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}
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extern "C" CDECL int
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rust_process_wait(void* task, int proc) {
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DWORD status;
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while (true) {
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if (GetExitCodeProcess((HANDLE)proc, &status) &&
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status != STILL_ACTIVE)
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return (int)status;
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WaitForSingleObject((HANDLE)proc, INFINITE);
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}
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}
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#elif defined(__GNUC__)
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#include <sys/file.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <termios.h>
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extern "C" CDECL int
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rust_run_program(rust_task* task, char* argv[],
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int in_fd, int out_fd, int err_fd) {
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int pid = fork();
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if (pid != 0) return pid;
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sigset_t sset;
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sigemptyset(&sset);
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sigprocmask(SIG_SETMASK, &sset, NULL);
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if (in_fd) dup2(in_fd, 0);
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if (out_fd) dup2(out_fd, 1);
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if (err_fd) dup2(err_fd, 2);
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/* Close all other fds. */
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for (int fd = getdtablesize() - 1; fd >= 3; fd--) close(fd);
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execvp(argv[0], argv);
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exit(1);
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}
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#else
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#error "Platform not supported."
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#endif
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//
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// Local Variables:
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// mode: C++
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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