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Add some new tricks to fish_test_helper

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Allow fish_test_helper to report if it is in the foreground, and to SIGINT
its parent.
This commit is contained in:
ridiculousfish 2019-07-15 21:30:58 -07:00
parent 8bb343879e
commit a40a4c0c54
1 changed files with 29 additions and 1 deletions
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30
src/fish_test_helper.cpp
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@ -1,6 +1,7 @@
// fish_test_helper is a little program with no fish dependencies that acts like certain other
// programs, allowing fish to test its behavior.
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -15,14 +16,41 @@ static void become_foreground_then_print_stderr() {
fprintf(stderr, "become_foreground_then_print_stderr done\n");
}
static void report_foreground() {
int was_fg = -1;
const auto grp = getpgrp();
for (;;) {
int is_fg = (tcgetpgrp(STDIN_FILENO) == grp);
if (is_fg != was_fg) {
was_fg = is_fg;
if (fputs(is_fg ? "foreground\n" : "background\n", stderr) < 0) {
return;
}
}
usleep(1000000 / 2);
}
}
static void sigint_parent() {
// SIGINT the parent after 1 second, then exit
int parent = getppid();
usleep(1000000 / 4); //.25 secs
kill(parent, SIGINT);
fprintf(stderr, "Sent SIGINT to %d\n", parent);
}
int main(int argc, char *argv[]) {
if (argc <= 1) {
fprintf(stderr, "No commands given.");
fprintf(stderr, "No commands given.\n");
return 0;
}
for (int i = 1; i < argc; i++) {
if (!strcmp(argv[i], "become_foreground_then_print_stderr")) {
become_foreground_then_print_stderr();
} else if (!strcmp(argv[i], "report_foreground")) {
report_foreground();
} else if (!strcmp(argv[i], "sigint_parent")) {
sigint_parent();
} else {
fprintf(stderr, "%s: Unknown command: %s\n", argv[0], argv[i]);
return EXIT_FAILURE;