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Make sure stdio handles are in blocking mode

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Standard I/O doesn't work well with non-blocking handles, so make sure any pipes are in blocking mode before launching child processes.

Fixes https://github.com/libsdl-org/SDL/issues/10998
This commit is contained in:
Sam Lantinga 2024-10-14 21:45:41 -07:00
parent bb764e3106
commit afee27a530
3 changed files with 31 additions and 0 deletions
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19
test/childprocess.c
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@ -13,6 +13,7 @@ int main(int argc, char *argv[]) {
bool stdin_to_stdout = false;
bool read_stdin = false;
bool stdin_to_stderr = false;
SDL_IOStream *log_stdin = NULL;
int exit_code = 0;
state = SDLTest_CommonCreateState(argv, 0);
@ -45,6 +46,15 @@ int main(int argc, char *argv[]) {
fprintf(stderr, "%s", argv[i + 1]);
consumed = 2;
}
} else if (SDL_strcmp(argv[i], "--log-stdin") == 0) {
if (i + 1 < argc) {
log_stdin = SDL_IOFromFile(argv[i + 1], "w");
if (!log_stdin) {
fprintf(stderr, "Couldn't open %s\n", argv[i + 1]);
return 2;
}
consumed = 2;
}
} else if (SDL_strcmp(argv[i], "--exit-code") == 0) {
if (i + 1 < argc) {
char *endptr = NULL;
@ -75,6 +85,7 @@ int main(int argc, char *argv[]) {
"[--print-arguments]",
"[--print-environment]",
"[--stdin]",
"[--log-stdin FILE]",
"[--stdin-to-stdout]",
"[--stdout TEXT]",
"[--stdin-to-stderr]",
@ -135,6 +146,10 @@ int main(int argc, char *argv[]) {
}
break;
}
if (log_stdin) {
SDL_WriteIO(log_stdin, buffer, result);
SDL_FlushIO(log_stdin);
}
if (stdin_to_stdout) {
fwrite(buffer, 1, result, stdout);
fflush(stdout);
@ -145,6 +160,10 @@ int main(int argc, char *argv[]) {
}
}
if (log_stdin) {
SDL_CloseIO(log_stdin);
}
SDLTest_CommonDestroyState(state);
return exit_code;