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make stdio configurable #102

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merged 4 commits into from
Mar 14, 2020
Merged

make stdio configurable #102

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cab34ec
simplify uvwasi_fd_table_init() signature
cjihrig Mar 13, 2020
df4a051
refactor stdio setup logic
cjihrig Mar 13, 2020
4d5fd1f
support passing stdio descriptors
cjihrig Mar 13, 2020
cdd8c08
rename std* for Windows
cjihrig Mar 13, 2020
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8 changes: 8 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,9 @@ int main(void) {
uvwasi_errno_t err;

/* Setup the initialization options. */
init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 3;
init_options.argv = calloc(3, sizeof(char*));
Expand All @@ -38,6 +41,7 @@ int main(void) {
init_options.preopens = calloc(1, sizeof(uvwasi_preopen_t));
init_options.preopens[0].mapped_path = "/var";
init_options.preopens[0].real_path = ".";
init_options.allocator = NULL;

/* Initialize the sandbox. */
err = uvwasi_init(&uvwasi, &init_options);
Expand Down Expand Up @@ -146,6 +150,10 @@ typedef struct uvwasi_options_s {
size_t argc;
char** argv;
char** envp;
uvwasi_fd_t in;
uvwasi_fd_t out;
uvwasi_fd_t err;
const uvwasi_mem_t* allocator;
} uvwasi_options_t;
```

Expand Down
4 changes: 2 additions & 2 deletions include/fd_table.h
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
#include "wasi_types.h"

struct uvwasi_s;
struct uvwasi_options_s;

struct uvwasi_fd_wrap_t {
uvwasi_fd_t id;
Expand All @@ -27,8 +28,7 @@ struct uvwasi_fd_table_t {
};

uvwasi_errno_t uvwasi_fd_table_init(struct uvwasi_s* uvwasi,
struct uvwasi_fd_table_t* table,
uint32_t init_size);
struct uvwasi_options_s* options);
void uvwasi_fd_table_free(struct uvwasi_s* uvwasi,
struct uvwasi_fd_table_t* table);
uvwasi_errno_t uvwasi_fd_table_insert(struct uvwasi_s* uvwasi,
Expand Down
3 changes: 3 additions & 0 deletions include/uvwasi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,9 @@ typedef struct uvwasi_options_s {
size_t argc;
char** argv;
char** envp;
uvwasi_fd_t in;
uvwasi_fd_t out;
uvwasi_fd_t err;
const uvwasi_mem_t* allocator;
} uvwasi_options_t;

Expand Down
96 changes: 57 additions & 39 deletions src/fd_table.c
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,46 @@
#include "uvwasi_alloc.h"


static uvwasi_errno_t uvwasi__insert_stdio(uvwasi_t* uvwasi,
struct uvwasi_fd_table_t* table,
const uvwasi_fd_t fd,
const uvwasi_fd_t expected,
const char* name) {
struct uvwasi_fd_wrap_t* wrap;
uvwasi_filetype_t type;
uvwasi_rights_t base;
uvwasi_rights_t inheriting;
uvwasi_errno_t err;

err = uvwasi__get_filetype_by_fd(fd, &type);
if (err != UVWASI_ESUCCESS)
return err;

err = uvwasi__get_rights(fd, UV_FS_O_RDWR, type, &base, &inheriting);
if (err != UVWASI_ESUCCESS)
return err;

err = uvwasi_fd_table_insert(uvwasi,
table,
fd,
name,
name,
type,
base,
inheriting,
0,
&wrap);
if (err != UVWASI_ESUCCESS)
return err;

if (wrap->id != expected)
err = UVWASI_EBADF;

uv_mutex_unlock(&wrap->mutex);
return err;
}


uvwasi_errno_t uvwasi_fd_table_insert(uvwasi_t* uvwasi,
struct uvwasi_fd_table_t* table,
uv_file fd,
Expand Down Expand Up @@ -117,25 +157,21 @@ uvwasi_errno_t uvwasi_fd_table_insert(uvwasi_t* uvwasi,


uvwasi_errno_t uvwasi_fd_table_init(uvwasi_t* uvwasi,
struct uvwasi_fd_table_t* table,
uint32_t init_size) {
struct uvwasi_fd_wrap_t* wrap;
uvwasi_filetype_t type;
uvwasi_rights_t base;
uvwasi_rights_t inheriting;
uvwasi_options_t* options) {
struct uvwasi_fd_table_t* table;
uvwasi_errno_t err;
int i;
int r;

/* Require an initial size of at least three to store the stdio FDs. */
if (table == NULL || init_size < 3)
if (uvwasi == NULL || options == NULL || options->fd_table_size < 3)
return UVWASI_EINVAL;

table = &uvwasi->fds;
table->fds = NULL;
table->used = 0;
table->size = init_size;
table->size = options->fd_table_size;
table->fds = uvwasi__calloc(uvwasi,
init_size,
options->fd_table_size,
sizeof(struct uvwasi_fd_wrap_t*));

if (table->fds == NULL)
Expand All @@ -154,35 +190,17 @@ uvwasi_errno_t uvwasi_fd_table_init(uvwasi_t* uvwasi,
}

/* Create the stdio FDs. */
for (i = 0; i < 3; ++i) {
err = uvwasi__get_filetype_by_fd(i, &type);
if (err != UVWASI_ESUCCESS)
goto error_exit;

err = uvwasi__get_rights(i, UV_FS_O_RDWR, type, &base, &inheriting);
if (err != UVWASI_ESUCCESS)
goto error_exit;

err = uvwasi_fd_table_insert(uvwasi,
table,
i,
"",
"",
type,
base,
inheriting,
0,
&wrap);
if (err != UVWASI_ESUCCESS)
goto error_exit;

r = (int) wrap->id != i || wrap->id != (uvwasi_fd_t) wrap->fd;
uv_mutex_unlock(&wrap->mutex);
if (r) {
err = UVWASI_EBADF;
goto error_exit;
}
}
err = uvwasi__insert_stdio(uvwasi, table, options->in, 0, "<stdin>");
if (err != UVWASI_ESUCCESS)
goto error_exit;

err = uvwasi__insert_stdio(uvwasi, table, options->out, 1, "<stdout>");
if (err != UVWASI_ESUCCESS)
goto error_exit;

err = uvwasi__insert_stdio(uvwasi, table, options->err, 2, "<stderr>");
if (err != UVWASI_ESUCCESS)
goto error_exit;

return UVWASI_ESUCCESS;
error_exit:
Expand Down
2 changes: 1 addition & 1 deletion src/uvwasi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -574,7 +574,7 @@ uvwasi_errno_t uvwasi_init(uvwasi_t* uvwasi, uvwasi_options_t* options) {
}
}

err = uvwasi_fd_table_init(uvwasi, &uvwasi->fds, options->fd_table_size);
err = uvwasi_fd_table_init(uvwasi, options);
if (err != UVWASI_ESUCCESS)
goto exit;

Expand Down
3 changes: 3 additions & 0 deletions test/test-args-get.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@ int main(void) {
char** args_get_argv;
char* buf;

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 3;
init_options.argv = calloc(3, sizeof(char*));
Expand Down
3 changes: 3 additions & 0 deletions test/test-basic-file-io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@ int main(void) {
uv_fs_req_cleanup(&req);
assert(r == 0 || r == UV_EEXIST);

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-ebadf-input-validation.c
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,9 @@ int main(void) {

test_void = (void*) &test_fdstat;

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-environ-get.c
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Expand Up @@ -20,6 +20,9 @@ int main(void) {
char* buf;
size_t i;

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-fd-prestat-dir-name.c
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Expand Up @@ -19,6 +19,9 @@ int main(void) {
uv_fs_req_cleanup(&req);
assert(r == 0 || r == UV_EEXIST);

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-multiple-wasi-destroys.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,9 @@ int main(void) {
uvwasi_options_t init_options;
uvwasi_errno_t err;

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-path-create-remove-directory.c
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Expand Up @@ -21,6 +21,9 @@ int main(void) {
uv_fs_req_cleanup(&req);
assert(r == 0 || r == UV_ENOENT);

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down
3 changes: 3 additions & 0 deletions test/test-random-get.c
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Expand Up @@ -13,6 +13,9 @@ int main(void) {
int success;
int i;

init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0;
init_options.argv = NULL;
Expand Down