inline static retvalue aptmethod_startup(struct aptmethod *method) {
pid_t f;
int mstdin[2];
int mstdout[2];
int r;
/* When there is nothing to get, there is no reason to startup
* the method. */
if (method->tobedone == NULL) {
return RET_NOTHING;
}
/* when we are already running, we are already ready...*/
if (method->child > 0) {
return RET_OK;
}
method->status = ams_waitforcapabilities;
r = pipe(mstdin);
if (r < 0) {
int e = errno;
fprintf(stderr, "Error %d creating pipe: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
r = pipe(mstdout);
if (r < 0) {
int e = errno;
(void)close(mstdin[0]); (void)close(mstdin[1]);
fprintf(stderr, "Error %d in pipe syscall: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
if (interrupted()) {
(void)close(mstdin[0]);(void)close(mstdin[1]);
(void)close(mstdout[0]);(void)close(mstdout[1]);
return RET_ERROR_INTERRUPTED;
}
f = fork();
if (f < 0) {
int e = errno;
(void)close(mstdin[0]); (void)close(mstdin[1]);
(void)close(mstdout[0]); (void)close(mstdout[1]);
fprintf(stderr, "Error %d forking: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
if (f == 0) {
char *methodname;
int e;
/* child: */
(void)close(mstdin[1]);
(void)close(mstdout[0]);
if (dup2(mstdin[0], 0) < 0) {
e = errno;
fprintf(stderr, "Error %d while setting stdin: %s\n",
e, strerror(e));
exit(255);
}
if (dup2(mstdout[1], 1) < 0) {
e = errno;
fprintf(stderr, "Error %d while setting stdout: %s\n",
e, strerror(e));
exit(255);
}
closefrom(3);
methodname = calc_dirconcat(global.methoddir, method->name);
if (FAILEDTOALLOC(methodname))
exit(255);
/* not really useful here, unless someone write reprepro
* specific modules (which I hope noone will) */
sethookenvironment(NULL, NULL, NULL, NULL);
/* actually call the method without any arguments: */
(void)execl(methodname, methodname, ENDOFARGUMENTS);
e = errno;
fprintf(stderr, "Error %d while executing '%s': %s\n",
e, methodname, strerror(e));
exit(255);
}
/* the main program continues... */
method->child = f;
if (verbose > 10)
fprintf(stderr,
"Method '%s' started as %d\n", method->baseuri, (int)f);
(void)close(mstdin[0]);
(void)close(mstdout[1]);
markcloseonexec(mstdin[1]);
markcloseonexec(mstdout[0]);
method->mstdin = mstdin[1];
method->mstdout = mstdout[0];
method->inputbuffer = NULL;
method->input_size = 0;
method->alreadyread = 0;
method->command = NULL;
method->output_length = 0;
method->alreadywritten = 0;
return RET_OK;
}
static retvalue callexporthook(/*@null@*/const char *hook, const char *relfilename, const char *mode, struct release *release) {
pid_t f, c;
int status;
int io[2];
char buffer[1000];
int already = 0;
if (hook == NULL)
return RET_NOTHING;
status = pipe(io);
if (status < 0) {
int e = errno;
fprintf(stderr, "Error %d creating pipe: %s!\n",
e, strerror(e));
return RET_ERRNO(e);
}
f = fork();
if (f < 0) {
int e = errno;
(void)close(io[0]);
(void)close(io[1]);
fprintf(stderr, "Error %d while forking for exporthook: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
if (f == 0) {
char *reltmpfilename;
int e;
if (dup2(io[1], 3) < 0) {
e = errno;
fprintf(stderr, "Error %d dup2'ing fd %d to 3: %s\n",
e, io[1], strerror(e));
exit(255);
}
/* "Doppelt haelt besser": */
if (io[0] != 3)
(void)close(io[0]);
if (io[1] != 3)
(void)close(io[1]);
closefrom(4);
/* backward compatibilty */
reltmpfilename = calc_addsuffix(relfilename, "new");
if (reltmpfilename == NULL) {
exit(255);
}
setenv("REPREPRO_BASE_DIR", global.basedir, true);
setenv("REPREPRO_OUT_DIR", global.outdir, true);
setenv("REPREPRO_CONF_DIR", global.confdir, true);
setenv("REPREPRO_DIST_DIR", global.distdir, true);
setenv("REPREPRO_LOG_DIR", global.logdir, true);
(void)execl(hook, hook, release_dirofdist(release),
reltmpfilename, relfilename, mode,
ENDOFARGUMENTS);
e = errno;
fprintf(stderr, "Error %d while executing '%s': %s\n",
e, hook, strerror(e));
exit(255);
}
close(io[1]);
markcloseonexec(io[0]);
if (verbose > 6)
printf("Called %s '%s' '%s.new' '%s' '%s'\n",
hook, release_dirofdist(release),
relfilename, relfilename, mode);
/* read what comes from the client */
while (true) {
ssize_t r;
int last, j;
r = read(io[0], buffer + already, 999 - already);
if (r < 0) {
int e = errno;
fprintf(stderr,
"Error %d reading from exporthook: %s!\n",
e, strerror(e));
break;
}
already += r;
if (r == 0) {
buffer[already] = '\0';
already++;
}
last = 0;
for (j = 0 ; j < already ; j++) {
if (buffer[j] == '\n' || buffer[j] == '\0') {
int next = j+1;
int e = (j>0)?(j-1):j;
retvalue ret;
while (last < j && xisspace(buffer[last]))
last++;
if (last >= j) {
last = next;
continue;
}
while (xisspace(buffer[e])) {
e--;
assert (e >= last);
}
ret = gotfilename(buffer + last, e - last + 1,
release);
if (RET_WAS_ERROR(ret)) {
(void)close(io[0]);
return ret;
}
last = next;
}
}
if (last > 0) {
if (already > last)
memmove(buffer, buffer + last, already - last);
already -= last;
}
if (r == 0)
break;
}
(void)close(io[0]);
do {
c = waitpid(f, &status, WUNTRACED);
if (c < 0) {
int e = errno;
fprintf(stderr,
"Error %d while waiting for hook '%s' to finish: %s\n", e, hook, strerror(e));
return RET_ERRNO(e);
}
} while (c != f);
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0) {
if (verbose > 6)
printf("Exporthook successfully returned!\n");
return RET_OK;
} else {
fprintf(stderr,
"Exporthook failed with exitcode %d!\n",
(int)WEXITSTATUS(status));
return RET_ERROR;
}
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "Exporthook killed by signal %d!\n",
(int)(WTERMSIG(status)));
return RET_ERROR;
} else {
fprintf(stderr,
"Exporthook terminated abnormally. (status is %x)!\n",
status);
return RET_ERROR;
}
}