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Cleaner logging of child output

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This commit is contained in:
Ian Gulliver
2016-03-06 18:57:37 -08:00
parent c7e1754239
commit ca754a817e
1 changed files with 15 additions and 7 deletions
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22
adsbus/exec.c
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@@ -34,8 +34,8 @@ static struct list_head exec_head = LIST_HEAD_INIT(exec_head);
static void exec_spawn_wrapper(struct peer *);
static void exec_harvest(struct exec *exec) {
int status;
if (exec->child) {
if (exec->child > 0) {
int status;
assert(waitpid(exec->child, &status, 0) == exec->child);
exec->child = -1;
if (WIFEXITED(status)) {
@@ -79,17 +79,25 @@ static void exec_log_handler(struct peer *peer) {
struct exec *exec = container_of(peer, struct exec, log_peer);
char linebuf[4096];
ssize_t len = read(exec->log_peer.fd, linebuf, 4096);
if (len <= 0) {
ssize_t ret = read(exec->log_peer.fd, linebuf, 4096);
if (ret <= 0) {
log_write('E', exec->id, "Log input stream closed");
assert(!close(exec->log_peer.fd));
exec->log_peer.fd = -1;
return;
}
if (linebuf[len - 1] == '\n') {
len--;
size_t len = (size_t) ret;
char *iter = linebuf, *eol;
while ((eol = memchr(iter, '\n', len))) {
assert(eol >= iter);
size_t linelen = (size_t) (eol - iter);
log_write('E', exec->id, "(child output) %.*s", linelen, iter);
iter += (linelen + 1);
len -= (linelen + 1);
}
if (len) {
log_write('E', exec->id, "(child output) %.*s", len, iter);
}
log_write('E', exec->id, "(child output) %.*s", len, linebuf);
}
static void exec_parent(struct exec *exec, pid_t child, int data_fd, int log_fd) {