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authorEric Andersen2004-02-10 01:28:36 +0000
committerEric Andersen2004-02-10 01:28:36 +0000
commit37032b4d6ced79fa3f14770c4f5bbf254ea0bae8 (patch)
tree1a71fc86c5903e348c08070d59576c11a9d87329 /shell
parentff9ad47d794fb26022a0e0b14d4ed946bd3bada6 (diff)
downloadbusybox-37032b4d6ced79fa3f14770c4f5bbf254ea0bae8.zip
busybox-37032b4d6ced79fa3f14770c4f5bbf254ea0bae8.tar.gz
Initial effort at disabling job control as well
Diffstat (limited to 'shell')
-rw-r--r--shell/lash.c41
1 files changed, 35 insertions, 6 deletions
diff --git a/shell/lash.c b/shell/lash.c
index 3675d21..a98aebd 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -57,7 +57,8 @@
#define expand_t glob_t
/* Always enable for the moment... */
-#define CONFIG_LASH_PIPE_N_REDIRECTS
+//#define CONFIG_LASH_PIPE_N_REDIRECTS
+//#define CONFIG_LASH_JOB_CONTROL
static const int MAX_READ = 128; /* size of input buffer for `read' builtin */
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
@@ -192,7 +193,6 @@ static int last_return_code;
static int last_bg_pid;
static unsigned int last_jobid;
static int shell_terminal;
-static pid_t shell_pgrp;
static char *PS1;
static char *PS2 = "> ";
@@ -513,6 +513,7 @@ static void close_all()
}
+#ifdef CONFIG_LASH_JOB_CONTROL
/* free up all memory from a job */
static void free_job(struct job *cmd)
{
@@ -609,6 +610,17 @@ static void checkjobs(struct jobset *j_list)
if (childpid == -1 && errno != ECHILD)
bb_perror_msg("waitpid");
}
+#else
+static void checkjobs(struct jobset *j_list)
+{
+}
+static void free_job(struct job *cmd)
+{
+}
+static void remove_job(struct jobset *j_list, struct job *job)
+{
+}
+#endif
#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
/* squirrel != NULL means we squirrel away copies of stdin, stdout,
@@ -1171,8 +1183,10 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
break;
#endif
+#ifdef CONFIG_LASH_JOB_CONTROL
case '&': /* background */
*inbg = 1;
+#endif
case ';': /* multiple commands */
done = 1;
return_command = *command_ptr + (src - *command_ptr) + 1;
@@ -1312,6 +1326,7 @@ static void insert_job(struct job *newjob, int inbg)
thejob->running_progs = thejob->num_progs;
thejob->stopped_progs = 0;
+#ifdef CONFIG_LASH_JOB_CONTROL
if (inbg) {
/* we don't wait for background thejobs to return -- append it
to the list of backgrounded thejobs and leave it alone */
@@ -1327,6 +1342,7 @@ static void insert_job(struct job *newjob, int inbg)
if (tcsetpgrp(shell_terminal, newjob->pgrp) && errno != ENOTTY)
bb_perror_msg("tcsetpgrp");
}
+#endif
}
static int run_command(struct job *newjob, int inbg, int outpipe[2])
@@ -1438,15 +1454,17 @@ static int busy_loop(FILE * input)
char *command;
char *next_command = NULL;
struct job newjob;
- pid_t parent_pgrp;
int i;
int inbg;
int status;
newjob.job_list = &job_list;
newjob.job_context = DEFAULT_CONTEXT;
+#ifdef CONFIG_LASH_JOB_CONTROL
+ pid_t parent_pgrp;
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(shell_terminal);
+#endif
command = (char *) xcalloc(BUFSIZ, sizeof(char));
@@ -1506,7 +1524,9 @@ static int busy_loop(FILE * input)
remove_job(&job_list, job_list.fg);
job_list.fg = NULL;
}
- } else {
+ }
+#ifdef CONFIG_LASH_JOB_CONTROL
+ else {
/* the child was stopped */
job_list.fg->stopped_progs++;
job_list.fg->progs[i].is_stopped = 1;
@@ -1524,13 +1544,16 @@ static int busy_loop(FILE * input)
if (tcsetpgrp(shell_terminal, getpgrp()) && errno != ENOTTY)
bb_perror_msg("tcsetpgrp");
}
+#endif
}
}
free(command);
+#ifdef CONFIG_LASH_JOB_CONTROL
/* return controlling TTY back to parent process group before exiting */
if (tcsetpgrp(shell_terminal, parent_pgrp) && errno != ENOTTY)
bb_perror_msg("tcsetpgrp");
+#endif
/* return exit status if called with "-c" */
if (input == NULL && WIFEXITED(status))
@@ -1539,7 +1562,6 @@ static int busy_loop(FILE * input)
return 0;
}
-
#ifdef CONFIG_FEATURE_CLEAN_UP
void free_memory(void)
{
@@ -1555,12 +1577,14 @@ void free_memory(void)
}
#endif
+#ifdef CONFIG_LASH_JOB_CONTROL
/* Make sure we have a controlling tty. If we get started under a job
* aware app (like bash for example), make sure we are now in charge so
* we don't fight over who gets the foreground */
static void setup_job_control(void)
{
int status;
+ pid_t shell_pgrp;
/* Loop until we are in the foreground. */
while ((status = tcgetpgrp (shell_terminal)) >= 0) {
@@ -1586,6 +1610,11 @@ static void setup_job_control(void)
/* Grab control of the terminal. */
tcsetpgrp(shell_terminal, shell_pgrp);
}
+#else
+static inline void setup_job_control(void)
+{
+}
+#endif
int lash_main(int argc_l, char **argv_l)
{
@@ -1647,7 +1676,7 @@ int lash_main(int argc_l, char **argv_l)
if (interactive==TRUE) {
//printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]);
/* Looks like they want an interactive shell */
-#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
+#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
printf( "\n\n" BB_BANNER " Built-in shell (lash)\n");
printf( "Enter 'help' for a list of built-in commands.\n\n");
#endif