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esh: bg command

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This commit is contained in:
K. Lange 2018-10-29 10:59:01 +09:00
parent 573dd69cd3
commit 7fe9c841d4
1 changed files with 27 additions and 7 deletions
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34
apps/sh.c
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@ -1295,7 +1295,7 @@ _nope:
}
if (nowait) {
fprintf(stderr, "[%d] Running\n", pgid);
fprintf(stderr, "[%d] %s\n", pgid, arg_starts[0][0]);
hashmap_set(job_hash, (void*)pgid, strdup(arg_starts[0][0]));
free(cmd);
return 0;
@ -1904,8 +1904,7 @@ uint32_t shell_cmd_read(int argc, char * argv[]) {
return 0;
}
uint32_t shell_cmd_fg(int argc, char * argv[]) {
int pid;
int get_available_job(int argc, char * argv[]) {
if (argc < 2) {
if (!suspended_pgid) {
list_t * keys = hashmap_keys(job_hash);
@ -1920,14 +1919,17 @@ uint32_t shell_cmd_fg(int argc, char * argv[]) {
return 1;
}
}
pid = suspended_pgid;
return suspended_pgid;
} else {
pid = atoi(argv[1]);
return atoi(argv[1]);
}
}
if (!hashmap_has(job_hash, (void*)pid)) {
uint32_t shell_cmd_fg(int argc, char * argv[]) {
int pid = get_available_job(argc,argv);
if (!pid || !hashmap_has(job_hash, (void*)pid)) {
fprintf(stderr, "invalid job");
return 0;
return 1;
}
if (kill(-pid, SIGCONT) < 0) {
@ -1939,6 +1941,23 @@ uint32_t shell_cmd_fg(int argc, char * argv[]) {
return wait_for_child(pid, NULL);
}
uint32_t shell_cmd_bg(int argc, char * argv[]) {
int pid = get_available_job(argc,argv);
if (!pid || !hashmap_has(job_hash, (void*)pid)) {
fprintf(stderr, "invalid job");
return 1;
}
if (kill(-pid, SIGCONT) < 0) {
fprintf(stderr, "no current job / bad pid\n");
hashmap_remove(job_hash, (void*)pid);
return 1;
}
fprintf(stderr, "[%d] %s\n", pid, (char*)hashmap_get(job_hash, (void*)pid));
return 0;
}
uint32_t shell_cmd_jobs(int argc, char * argv[]) {
list_t * keys = hashmap_keys(job_hash);
foreach(node, keys) {
@ -1974,4 +1993,5 @@ void install_commands() {
shell_install_command("read", shell_cmd_read, "read user input");
shell_install_command("fg", shell_cmd_fg, "resume a suspended job");
shell_install_command("jobs", shell_cmd_jobs, "list stopped jobs");
shell_install_command("bg", shell_cmd_bg, "restart suspended job in the background");
}