static struct builtInCommand bltins[] = {
{"bg", "Resume a job in the background", "bg [%%job]", shell_fg_bg},
{"cd", "Change working directory", "cd [dir]", shell_cd},
- {"env", "Print all environment variables", "env", shell_env},
{"exit", "Exit from shell()", "exit", shell_exit},
{"fg", "Bring job into the foreground", "fg [%%job]", shell_fg_bg},
{"jobs", "Lists the active jobs", "jobs", shell_jobs},
- {"pwd", "Print current directory", "pwd", shell_pwd},
{"export", "Set environment variable", "export [VAR=value]", shell_export},
{"unset", "Unset environment variable", "unset VAR", shell_unset},
+ {NULL, NULL, NULL, NULL}
+};
+
+/* Table of built-in functions */
+static struct builtInCommand bltins_forking[] = {
+ {"env", "Print all environment variables", "env", shell_env},
+ {"pwd", "Print current directory", "pwd", shell_pwd},
{".", "Source-in and run commands in a file", ". filename", shell_source},
{"help", "List shell built-in commands", "help", shell_help},
{NULL, NULL, NULL, NULL}
};
static const char shell_usage[] =
-
- "sh [FILE]...\n"
+ "sh [FILE]...\n"
+ " or: sh -c command [args]...\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nlash: The BusyBox command interpreter (shell).\n\n"
#endif
static char cwd[1024];
static char *prompt = "# ";
+static char *local_pending_command = NULL;
#ifdef BB_FEATURE_SH_COMMAND_EDITING
void win_changed(int sig)
if (!cmd->progs[0].argv[1] == 1)
exit TRUE;
- else
- exit(atoi(cmd->progs[0].argv[1]));
+ return(atoi(cmd->progs[0].argv[1]));
}
/* built-in 'fg' and 'bg' handler */
if (*cmd->progs[0].argv[0] == 'f') {
/* Make this job the foreground job */
- if (tcsetpgrp(0, job->pgrp))
- perror("tcsetpgrp");
+ /* suppress messages when run from /linuxrc mag@sysgo.de */
+ if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY)
+ perror("tcsetpgrp");
jobList->fg = job;
}
for (x = bltins; x->cmd; x++) {
fprintf(stdout, "%s\t%s\n", x->cmd, x->descr);
}
+ for (x = bltins_forking; x->cmd; x++) {
+ fprintf(stdout, "%s\t%s\n", x->cmd, x->descr);
+ }
fprintf(stdout, "\n\n");
return TRUE;
}
static int getCommand(FILE * source, char *command)
{
+ if (source == NULL) {
+ if (local_pending_command) {
+ /* a command specified (-c option): return it & mark it done */
+ strcpy(command, local_pending_command);
+ free(local_pending_command);
+ local_pending_command = NULL;
+ return 0;
+ }
+ return 1;
+ }
+
if (source == stdin) {
#ifdef BB_FEATURE_SH_COMMAND_EDITING
int len;
nextout = 1;
}
+ /* Match any built-ins here */
+ for (x = bltins; x->cmd; x++) {
+ if (!strcmp(newJob.progs[i].argv[0], x->cmd)) {
+ return (x->function(&newJob, jobList));
+ }
+ }
+
if (!(newJob.progs[i].pid = fork())) {
signal(SIGTTOU, SIG_DFL);
setupRedirections(newJob.progs + i);
/* Match any built-ins here */
- for (x = bltins; x->cmd; x++) {
+ for (x = bltins_forking; x->cmd; x++) {
if (!strcmp(newJob.progs[i].argv[0], x->cmd)) {
exit (x->function(&newJob, jobList));
}
jobList->fg = job;
/* move the new process group into the foreground */
- if (tcsetpgrp(0, newJob.pgrp))
+ /* suppress messages when run from /linuxrc mag@sysgo.de */
+ if (tcsetpgrp(0, newJob.pgrp) && errno != ENOTTY)
perror("tcsetpgrp");
}
char *nextCommand = NULL;
struct jobSet jobList = { NULL, NULL };
struct job newJob;
+ pid_t parent_pgrp;
int i;
int status;
int inBg;
+ /* save current owner of TTY so we can restore it on exit */
+ parent_pgrp = tcgetpgrp(0);
+
command = (char *) calloc(BUFSIZ, sizeof(char));
/* don't pay any attention to this signal; it just confuses
removeJob(&jobList, jobList.fg);
jobList.fg = NULL;
-
- /* move the shell to the foreground */
- if (tcsetpgrp(0, getpid()))
- perror("tcsetpgrp");
}
} else {
/* the child was stopped */
if (!jobList.fg) {
/* move the shell to the foreground */
- if (tcsetpgrp(0, getpid()))
- perror("tcsetpgrp");
+ /* suppress messages when run from /linuxrc mag@sysgo.de */
+ if (tcsetpgrp(0, getpid()) && errno != ENOTTY)
+ perror("tcsetpgrp");
}
}
}
free(command);
+ /* return controlling TTY back to parent process group before exiting */
+ if (tcsetpgrp(0, parent_pgrp))
+ perror("tcsetpgrp");
+
return 0;
}
{
FILE *input = stdin;
- if (argc > 2) {
- usage(shell_usage);
- }
/* initialize the cwd */
getcwd(cwd, sizeof(cwd));
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT);
fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n");
} else {
- if (*argv[1]=='-') {
- usage("sh\n\nlash -- the BusyBox LAme SHell (command interpreter)\n");
+ if (argv[1][0]=='-' && argv[1][1]=='c') {
+ int i;
+ local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
+ if (local_pending_command == 0) {
+ fatalError("sh: out of memory\n");
+ }
+ for(i=2; i<argc; i++)
+ {
+ if (strlen(local_pending_command) + strlen(argv[i]) >= BUFSIZ) {
+ fatalError("sh: commands for -c option too long\n");
+ }
+ strcat(local_pending_command, argv[i]);
+ if (i + 1 < argc)
+ strcat(local_pending_command, " ");
+ }
+ input = NULL;
+
}
- input = fopen(argv[1], "r");
- if (!input) {
- fatalError("sh: Couldn't open file '%s': %s\n", argv[1],
- strerror(errno));
+ else if (argv[1][0]=='-') {
+ usage(shell_usage);
+ }
+ else {
+ input = fopen(argv[1], "r");
+ if (!input) {
+ fatalError("sh: Couldn't open file '%s': %s\n", argv[1],
+ strerror(errno));
+ }
}
}
projects / oweals / busybox.git / blobdiff