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commandhelper: Factor out parseArguments

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Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Tim Wiederhake 2021-02-01 12:27:51 +01:00 committed by Peter Krempa
parent d940baaa81
commit d23bc5506e
1 changed files with 57 additions and 26 deletions
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83
tests/commandhelper.c
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@ -35,6 +35,51 @@ extern char **environ;
# define VIR_FROM_THIS VIR_FROM_NONE
struct Arguments {
int readfds[3];
int numreadfds;
bool daemonize_check;
bool close_stdin;
};
static struct Arguments *parseArguments(int argc, char** argv)
{
struct Arguments* args = NULL;
int ret = -1;
size_t i;
if (!(args = calloc(1, sizeof(*args))))
goto cleanup;
args->numreadfds = 1;
args->readfds[0] = STDIN_FILENO;
for (i = 1; i < argc; i++) {
if (STREQ(argv[i - 1], "--readfd")) {
char c;
if (1 != sscanf(argv[i], "%u%c",
&args->readfds[args->numreadfds++], &c)) {
printf("Could not parse fd %s\n", argv[i]);
goto cleanup;
}
} else if (STREQ(argv[i], "--check-daemonize")) {
args->daemonize_check = true;
} else if (STREQ(argv[i], "--close-stdin")) {
args->close_stdin = true;
}
}
ret = 0;
cleanup:
if (ret == 0)
return args;
free(args);
return NULL;
}
static int envsort(const void *a, const void *b)
{
const char *astr = *(const char**)a;
@ -53,39 +98,23 @@ static int envsort(const void *a, const void *b)
}
int main(int argc, char **argv) {
struct Arguments *args = parseArguments(argc, argv);
size_t i, n;
int open_max;
char **newenv = NULL;
char *cwd;
FILE *log = fopen(abs_builddir "/commandhelper.log", "w");
int ret = EXIT_FAILURE;
int readfds[3] = { STDIN_FILENO, };
int numreadfds = 1;
struct pollfd fds[3];
char *buffers[3] = {NULL, NULL, NULL};
size_t buflen[3] = {0, 0, 0};
char c;
bool daemonize_check = false;
bool close_stdin = false;
size_t daemonize_retries = 3;
char buf[1024];
ssize_t got;
if (!log)
if (!log || !args)
goto cleanup;
for (i = 1; i < argc; i++) {
if (STREQ(argv[i - 1], "--readfd") &&
sscanf(argv[i], "%u%c", &readfds[numreadfds++], &c) != 1) {
printf("Could not parse fd %s\n", argv[i]);
goto cleanup;
} else if (STREQ(argv[i], "--check-daemonize")) {
daemonize_check = true;
} else if (STREQ(argv[i], "--close-stdin")) {
close_stdin = true;
}
}
for (i = 1; i < argc; i++) {
fprintf(log, "ARG:%s\n", argv[i]);
}
@ -126,7 +155,7 @@ int main(int argc, char **argv) {
while (true) {
bool daemonized = getpgrp() != getppid();
if (daemonize_check && !daemonized && daemonize_retries-- > 0) {
if (args->daemonize_check && !daemonized && daemonize_retries-- > 0) {
usleep(100*1000);
continue;
}
@ -154,7 +183,7 @@ int main(int argc, char **argv) {
fprintf(log, "UMASK:%04o\n", umask(0));
if (close_stdin) {
if (args->close_stdin) {
if (freopen("/dev/null", "r", stdin) != stdin)
goto cleanup;
usleep(100*1000);
@ -165,8 +194,8 @@ int main(int argc, char **argv) {
fprintf(stderr, "BEGIN STDERR\n");
fflush(stderr);
for (i = 0; i < numreadfds; i++) {
fds[i].fd = readfds[i];
for (i = 0; i < args->numreadfds; i++) {
fds[i].fd = args->readfds[i];
fds[i].events = POLLIN;
fds[i].revents = 0;
}
@ -174,12 +203,12 @@ int main(int argc, char **argv) {
for (;;) {
unsigned ctr = 0;
if (poll(fds, numreadfds, -1) < 0) {
if (poll(fds, args->numreadfds, -1) < 0) {
printf("poll failed: %s\n", strerror(errno));
goto cleanup;
}
for (i = 0; i < numreadfds; i++) {
for (i = 0; i < args->numreadfds; i++) {
short revents = POLLIN | POLLHUP | POLLERR;
# ifdef __APPLE__
@ -210,7 +239,7 @@ int main(int argc, char **argv) {
}
}
}
for (i = 0; i < numreadfds; i++) {
for (i = 0; i < args->numreadfds; i++) {
if (fds[i].events) {
ctr++;
break;
@ -220,7 +249,7 @@ int main(int argc, char **argv) {
break;
}
for (i = 0; i < numreadfds; i++) {
for (i = 0; i < args->numreadfds; i++) {
if (fwrite(buffers[i], 1, buflen[i], stdout) != buflen[i])
goto cleanup;
if (fwrite(buffers[i], 1, buflen[i], stderr) != buflen[i])
@ -237,6 +266,8 @@ int main(int argc, char **argv) {
cleanup:
for (i = 0; i < G_N_ELEMENTS(buffers); i++)
free(buffers[i]);
if (args)
free(args);
if (newenv)
free(newenv);
if (log)