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Split internal_exec to its own function

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This commit is contained in:
Mahmoud Al-Qudsi 2017-07-30 17:26:41 -05:00 committed by Kurtis Rader
parent 711c81b8c8
commit 4a1de248bc
1 changed files with 34 additions and 29 deletions
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63
src/exec.cpp
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@ -366,6 +366,39 @@ static bool can_use_posix_spawn_for_job(const job_t *job, const process_t *proce
return result;
}
void internal_exec(job_t *j, const io_chain_t &&all_ios) {
// Do a regular launch - but without forking first...
signal_block();
// setup_child_process makes sure signals are properly set up. It will also call
// signal_unblock.
// PCA This is for handling exec. Passing all_ios here matches what fish 2.0.0 and 1.x did.
// It's known to be wrong - for example, it means that redirections bound for subsequent
// commands in the pipeline will apply to exec. However, using exec in a pipeline doesn't
// really make sense, so I'm not trying to fix it here.
if (!setup_child_process(0, all_ios)) {
// Decrement SHLVL as we're removing ourselves from the shell "stack".
const env_var_t shlvl_str = env_get_string(L"SHLVL", ENV_GLOBAL | ENV_EXPORT);
wcstring nshlvl_str = L"0";
if (!shlvl_str.missing()) {
long shlvl_i = fish_wcstol(shlvl_str.c_str());
if (!errno && shlvl_i > 0) {
nshlvl_str = to_string<long>(shlvl_i - 1);
}
}
env_set(L"SHLVL", nshlvl_str.c_str(), ENV_GLOBAL | ENV_EXPORT);
// launch_process _never_ returns.
launch_process_nofork(j->processes.front().get());
} else {
j->set_flag(JOB_CONSTRUCTED, true);
j->processes.front()->completed = 1;
return;
}
}
void exec_job(parser_t &parser, job_t *j) {
pid_t pid = 0;
@ -401,35 +434,7 @@ void exec_job(parser_t &parser, job_t *j) {
}
if (j->processes.front()->type == INTERNAL_EXEC) {
// Do a regular launch - but without forking first...
signal_block();
// setup_child_process makes sure signals are properly set up. It will also call
// signal_unblock.
// PCA This is for handling exec. Passing all_ios here matches what fish 2.0.0 and 1.x did.
// It's known to be wrong - for example, it means that redirections bound for subsequent
// commands in the pipeline will apply to exec. However, using exec in a pipeline doesn't
// really make sense, so I'm not trying to fix it here.
if (!setup_child_process(0, all_ios)) {
// Decrement SHLVL as we're removing ourselves from the shell "stack".
const env_var_t shlvl_str = env_get(L"SHLVL", ENV_GLOBAL | ENV_EXPORT);
wcstring nshlvl_str = L"0";
if (!shlvl_str.missing()) {
long shlvl_i = fish_wcstol(shlvl_str.c_str());
if (!errno && shlvl_i > 0) {
nshlvl_str = to_string<long>(shlvl_i - 1);
}
}
env_set(L"SHLVL", nshlvl_str.c_str(), ENV_GLOBAL | ENV_EXPORT);
// launch_process _never_ returns.
launch_process_nofork(j->processes.front().get());
} else {
j->set_flag(JOB_CONSTRUCTED, true);
j->processes.front()->completed = 1;
return;
}
internal_exec(j, std::move(all_ios));
DIE("this should be unreachable");
}