#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
+#ifdef BB_FEATURE_SH_COMMAND_EDITING
+#include "cmdedit.h"
+#endif
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
static struct builtInCommand bltins[] = {
{"bg", "Resume a job in the background", "bg [%%job]", shell_fg_bg},
{"cd", "Change working directory", "cd [dir]", shell_cd},
- //{"echo", "Echo arguments on stdout", "echo arg1 [...]", shell_echo},
- {"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\n" "The BusyBox command interpreter (shell).\n\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)
+{
+ struct winsize win = { 0, 0 };
+ ioctl(0, TIOCGWINSZ, &win);
+ if (win.ws_col > 0) {
+ cmdedit_setwidth( win.ws_col - 1);
+ }
+}
+#endif
/* built-in 'cd <path>' handler */
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;
fflush(stdout);
promptStr=(char*)malloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
- cmdedit_read_input(promptStr, fileno(stdin), fileno(stdout), command);
+ cmdedit_read_input(promptStr, command);
free( promptStr);
return 0;
#else
strcpy(job->text, *commandPtr);
} else {
/* This leaves any trailing spaces, which is a bit sloppy */
-
count = returnCommand - *commandPtr;
job->text = malloc(count + 1);
strncpy(job->text, *commandPtr, count);
return 0;
}
+
static int runCommand(struct job newJob, struct jobSet *jobList, int inBg)
{
struct job *job;
int nextin, nextout;
int pipefds[2]; /* pipefd[0] is for reading */
struct builtInCommand *x;
+#ifdef BB_FEATURE_STANDALONE_SHELL
+ const struct BB_applet *a = applets;
+#endif
- /* handle built-ins here -- we don't fork() so we can't background
- these very easily */
- for (x = bltins; x->cmd; x++) {
- if (!strcmp(newJob.progs[0].argv[0], x->cmd)) {
- return (x->function(&newJob, jobList));
- }
- }
nextin = 0, nextout = 1;
for (i = 0; i < newJob.numProgs; i++) {
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);
/* explicit redirections override pipes */
setupRedirections(newJob.progs + i);
+ /* Match any built-ins here */
+ for (x = bltins_forking; x->cmd; x++) {
+ if (!strcmp(newJob.progs[i].argv[0], x->cmd)) {
+ exit (x->function(&newJob, jobList));
+ }
+ }
+#ifdef BB_FEATURE_STANDALONE_SHELL
+ /* Handle busybox internals here */
+ while (a->name != 0) {
+ if (strcmp(newJob.progs[i].argv[0], a->name) == 0) {
+ int argc;
+ char** argv=newJob.progs[i].argv;
+ for(argc=0;*argv!=NULL; argv++, argc++);
+ exit((*(a->main)) (argc, newJob.progs[i].argv));
+ }
+ a++;
+ }
+#endif
+
execvp(newJob.progs[i].argv[0], newJob.progs[i].argv);
fatalError("sh: %s: %s\n", newJob.progs[i].argv[0],
strerror(errno));
if (inBg) {
/* we don't wait for background jobs to return -- append it
to the list of backgrounded jobs and leave it alone */
-
printf("[%d] %d\n", job->jobId,
newJob.progs[newJob.numProgs - 1].pid);
} else {
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));
+#ifdef BB_FEATURE_SH_COMMAND_EDITING
+ cmdedit_init();
+ signal(SIGWINCH, win_changed);
+ win_changed(0);
+#endif
//if (argv[0] && argv[0][0] == '-') {
// shell_source("/etc/profile");
//}
if (argc < 2) {
- 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");
+ 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 {
- input = fopen(argv[1], "r");
- if (!input)
- fatalError("A: Couldn't open file '%s': %s\n", argv[1],
- strerror(errno));
-// else
-// fatalError("Got it.\n");
- //exit(shell_source(argv[1]));
-
- /* Set terminal IO to canonical mode, and save old term settings. */
-#ifdef BB_FEATURE_SH_COMMAND_EDITING
- cmdedit_init();
-#endif
+ 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;
+
+ }
+ 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));
+ }
+ }
}
return (busy_loop(input));
projects / oweals / busybox.git / blobdiff