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-rw-r--r--shell/lash.c165
1 files changed, 84 insertions, 81 deletions
diff --git a/shell/lash.c b/shell/lash.c
index f938a74..99b6173 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -29,12 +29,14 @@
/* Always enable for the moment... */
#define CONFIG_LASH_PIPE_N_REDIRECTS
#define CONFIG_LASH_JOB_CONTROL
+#define ENABLE_LASH_PIPE_N_REDIRECTS 1
+#define ENABLE_LASH_JOB_CONTROL 1
enum { MAX_READ = 128 }; /* size of input buffer for 'read' builtin */
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
enum redir_type { REDIRECT_INPUT, REDIRECT_OVERWRITE,
REDIRECT_APPEND
};
@@ -51,7 +53,7 @@ enum {
#define LASH_OPT_DONE (1)
#define LASH_OPT_SAW_QUOTE (2)
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
struct redir_struct {
enum redir_type type; /* type of redirection */
int fd; /* file descriptor being redirected */
@@ -65,7 +67,7 @@ struct child_prog {
int num_redirects; /* elements in redirection array */
int is_stopped; /* is the program currently running? */
struct job *family; /* pointer back to the child's parent job */
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
struct redir_struct *redirects; /* I/O redirects */
#endif
};
@@ -229,7 +231,8 @@ static int builtin_exec(struct child_prog *child)
if (child->argv[1] == NULL)
return EXIT_SUCCESS; /* Really? */
child->argv++;
- while(close_me_list) close((long)llist_pop(&close_me_list));
+ while (close_me_list)
+ close((long)llist_pop(&close_me_list));
pseudo_exec(child);
/* never returns */
}
@@ -247,7 +250,7 @@ static int builtin_exit(struct child_prog *child)
static int builtin_fg_bg(struct child_prog *child)
{
int i, jobnum;
- struct job *job=NULL;
+ struct job *job = NULL;
/* If they gave us no args, assume they want the last backgrounded task */
if (!child->argv[1]) {
@@ -289,7 +292,8 @@ static int builtin_fg_bg(struct child_prog *child)
job->stopped_progs = 0;
- if ( (i=kill(- job->pgrp, SIGCONT)) < 0) {
+ i = kill(- job->pgrp, SIGCONT);
+ if (i < 0) {
if (i == ESRCH) {
remove_job(&job_list, job);
} else {
@@ -365,16 +369,16 @@ static int builtin_export(struct child_prog *child)
res = putenv(v);
if (res)
bb_perror_msg("export");
-#ifdef CONFIG_FEATURE_EDITING_FANCY_PROMPT
- if (strncmp(v, "PS1=", 4)==0)
+#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
+ if (strncmp(v, "PS1=", 4) == 0)
PS1 = getenv("PS1");
#endif
-#ifdef CONFIG_LOCALE_SUPPORT
+#if ENABLE_LOCALE_SUPPORT
// TODO: why getenv? "" would be just as good...
- if(strncmp(v, "LC_ALL=", 7)==0)
+ if (strncmp(v, "LC_ALL=", 7) == 0)
setlocale(LC_ALL, getenv("LC_ALL"));
- if(strncmp(v, "LC_CTYPE=", 9)==0)
+ if (strncmp(v, "LC_CTYPE=", 9) == 0)
setlocale(LC_CTYPE, getenv("LC_CTYPE"));
#endif
@@ -445,7 +449,7 @@ static int builtin_unset(struct child_prog *child)
return EXIT_SUCCESS;
}
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_LASH_JOB_CONTROL
/* free up all memory from a job */
static void free_job(struct job *cmd)
{
@@ -454,7 +458,7 @@ static void free_job(struct job *cmd)
for (i = 0; i < cmd->num_progs; i++) {
free(cmd->progs[i].argv);
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
if (cmd->progs[i].redirects)
free(cmd->progs[i].redirects);
#endif
@@ -509,7 +513,7 @@ static void checkjobs(struct jobset *j_list)
}
/* This happens on backticked commands */
- if(job==NULL)
+ if (job == NULL)
return;
if (WIFEXITED(status) || WIFSIGNALED(status)) {
@@ -519,7 +523,7 @@ static void checkjobs(struct jobset *j_list)
if (!job->running_progs) {
printf(JOB_STATUS_FORMAT, job->jobid, "Done", job->text);
- last_jobid=0;
+ last_jobid = 0;
remove_job(j_list, job);
}
} else {
@@ -544,7 +548,7 @@ static void remove_job(struct jobset *j_list, struct job *job)
}
#endif
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
/* squirrel != NULL means we squirrel away copies of stdin, stdout,
* and stderr if they are redirected. */
static int setup_redirects(struct child_prog *prog, int squirrel[])
@@ -591,7 +595,7 @@ static int setup_redirects(struct child_prog *prog, int squirrel[])
static void restore_redirects(int squirrel[])
{
int i, fd;
- for (i=0; i<3; i++) {
+ for (i = 0; i < 3; i++) {
fd = squirrel[i];
if (fd != -1) {
/* No error checking. I sure wouldn't know what
@@ -617,7 +621,7 @@ static inline void cmdedit_set_initial_prompt(void)
PS1 = NULL;
#else
PS1 = getenv("PS1");
- if(PS1==0)
+ if (PS1 == 0)
PS1 = "\\w \\$ ";
#endif
}
@@ -637,7 +641,7 @@ static inline const char* setup_prompt_string(void)
return PS2;
}
#else
- return (shell_context==0)? PS1 : PS2;
+ return (shell_context == 0)? PS1 : PS2;
#endif
}
@@ -686,10 +690,10 @@ static int get_command(FILE * source, char *command)
return 0;
}
-static char * strsep_space( char *string, int * ix)
+static char * strsep_space(char *string, int * ix)
{
/* Short circuit the trivial case */
- if ( !string || ! string[*ix])
+ if (!string || ! string[*ix])
return NULL;
/* Find the end of the token. */
@@ -713,7 +717,7 @@ static char * strsep_space( char *string, int * ix)
static int expand_arguments(char *command)
{
- int total_length=0, length, i, retval, ix = 0;
+ int total_length = 0, length, i, retval, ix = 0;
expand_t expand_result;
char *tmpcmd, *cmd, *cmd_copy;
char *src, *dst, *var;
@@ -731,7 +735,7 @@ static int expand_arguments(char *command)
chomp(command);
/* Fix up escape sequences to be the Real Thing(tm) */
- while( command && command[ix]) {
+ while (command && command[ix]) {
if (command[ix] == '\\') {
const char *tmp = command+ix+1;
command[ix] = bb_process_escape_sequence( &tmp );
@@ -750,7 +754,7 @@ static int expand_arguments(char *command)
cmd = cmd_copy = xstrdup(command);
*command = '\0';
for (ix = 0, tmpcmd = cmd;
- (tmpcmd = strsep_space(cmd, &ix)) != NULL; cmd += ix, ix=0) {
+ (tmpcmd = strsep_space(cmd, &ix)) != NULL; cmd += ix, ix = 0) {
if (*tmpcmd == '\0')
break;
/* we need to trim() the result for glob! */
@@ -771,16 +775,16 @@ static int expand_arguments(char *command)
} else {
/* Convert from char** (one word per string) to a simple char*,
* but don't overflow command which is BUFSIZ in length */
- for (i=0; i < expand_result.gl_pathc; i++) {
- length=strlen(expand_result.gl_pathv[i]);
+ for (i = 0; i < expand_result.gl_pathc; i++) {
+ length = strlen(expand_result.gl_pathv[i]);
if (total_length+length+1 >= BUFSIZ) {
bb_error_msg(out_of_space);
return FALSE;
}
strcat(command+total_length, " ");
- total_length+=1;
+ total_length += 1;
strcat(command+total_length, expand_result.gl_pathv[i]);
- total_length+=length;
+ total_length += length;
}
globfree (&expand_result);
}
@@ -791,14 +795,14 @@ static int expand_arguments(char *command)
/* Now do the shell variable substitutions which
* wordexp can't do for us, namely $? and $! */
src = command;
- while((dst = strchr(src,'$')) != NULL){
+ while ((dst = strchr(src,'$')) != NULL) {
var = NULL;
switch (*(dst+1)) {
case '?':
var = itoa(last_return_code);
break;
case '!':
- if (last_bg_pid==-1)
+ if (last_bg_pid == -1)
*var = '\0';
else
var = itoa(last_bg_pid);
@@ -817,9 +821,9 @@ static int expand_arguments(char *command)
case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9':
{
- int ixx=*(dst+1)-48+1;
+ int ixx = *(dst+1)-48+1;
if (ixx >= argc) {
- var='\0';
+ var = '\0';
} else {
var = argv[ixx];
}
@@ -830,27 +834,27 @@ static int expand_arguments(char *command)
if (var) {
/* a single character construction was found, and
* already handled in the case statement */
- src=dst+2;
+ src = dst + 2;
} else {
/* Looks like an environment variable */
char delim_hold;
- int num_skip_chars=0;
+ int num_skip_chars = 0;
int dstlen = strlen(dst);
/* Is this a ${foo} type variable? */
- if (dstlen >=2 && *(dst+1) == '{') {
- src=strchr(dst+1, '}');
- num_skip_chars=1;
+ if (dstlen >= 2 && *(dst+1) == '{') {
+ src = strchr(dst+1, '}');
+ num_skip_chars = 1;
} else {
- src=dst+1;
- while((isalnum)(*src) || *src=='_') src++;
+ src = dst + 1;
+ while ((isalnum)(*src) || *src == '_') src++;
}
if (src == NULL) {
src = dst+dstlen;
}
- delim_hold=*src;
- *src='\0'; /* temporary */
+ delim_hold = *src;
+ *src = '\0'; /* temporary */
var = getenv(dst + 1 + num_skip_chars);
- *src=delim_hold;
+ *src = delim_hold;
src += num_skip_chars;
}
if (var == NULL) {
@@ -891,7 +895,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
int argv_alloced;
char quote = '\0';
struct child_prog *prog;
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
int i;
char *chptr;
#endif
@@ -901,7 +905,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
/* this handles empty lines or leading '#' characters */
if (!**command_ptr || (**command_ptr == '#')) {
- job->num_progs=0;
+ job->num_progs = 0;
return 0;
}
@@ -923,7 +927,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
prog->num_redirects = 0;
prog->is_stopped = 0;
prog->family = job;
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
prog->redirects = NULL;
#endif
@@ -961,8 +965,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
if ((argc_l + 1) == argv_alloced) {
argv_alloced += 5;
prog->argv = xrealloc(prog->argv,
- sizeof(*prog->argv) *
- argv_alloced);
+ sizeof(*prog->argv) * argv_alloced);
}
prog->argv[argc_l] = buf;
flag ^= LASH_OPT_SAW_QUOTE;
@@ -982,13 +985,12 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
flag |= LASH_OPT_DONE;
break;
-#ifdef CONFIG_LASH_PIPE_N_REDIRECTS
+#if ENABLE_LASH_PIPE_N_REDIRECTS
case '>': /* redirects */
case '<':
i = prog->num_redirects++;
prog->redirects = xrealloc(prog->redirects,
- sizeof(*prog->redirects) *
- (i + 1));
+ sizeof(*prog->redirects) * (i + 1));
prog->redirects[i].fd = -1;
if (buf != prog->argv[argc_l]) {
@@ -1027,7 +1029,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
if (!*chptr) {
bb_error_msg("file name expected after %c", *(src-1));
free_job(job);
- job->num_progs=0;
+ job->num_progs = 0;
return 1;
}
@@ -1051,7 +1053,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
/* and start the next */
job->num_progs++;
job->progs = xrealloc(job->progs,
- sizeof(*job->progs) * job->num_progs);
+ sizeof(*job->progs) * job->num_progs);
prog = job->progs + (job->num_progs - 1);
prog->num_redirects = 0;
prog->redirects = NULL;
@@ -1070,7 +1072,7 @@ static int parse_command(char **command_ptr, struct job *job, int *inbg)
empty_command_in_pipe:
bb_error_msg("empty command in pipe");
free_job(job);
- job->num_progs=0;
+ job->num_progs = 0;
return 1;
}
src--; /* we'll ++ it at the end of the loop */
@@ -1078,7 +1080,7 @@ empty_command_in_pipe:
break;
#endif
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_LASH_JOB_CONTROL
case '&': /* background */
*inbg = 1;
/* fallthrough */
@@ -1146,8 +1148,8 @@ static int pseudo_exec(struct child_prog *child)
/* Check if the command matches any of the forking builtins. */
for (x = bltins_forking; x->cmd; x++) {
if (strcmp(child->argv[0], x->cmd) == 0) {
- applet_name=x->cmd;
- _exit (x->function(child));
+ applet_name = x->cmd;
+ _exit(x->function(child));
}
}
@@ -1162,12 +1164,11 @@ static int pseudo_exec(struct child_prog *child)
* /bin/foo invocation will fork and exec /bin/foo, even if
* /bin/foo is a symlink to busybox.
*/
-
if (ENABLE_FEATURE_SH_STANDALONE_SHELL) {
char **argv_l = child->argv;
int argc_l;
- for (argc_l=0; *argv_l; argv_l++, argc_l++);
+ for (argc_l = 0; *argv_l; argv_l++, argc_l++);
optind = 1;
run_applet_by_name(child->argv[0], argc_l, child->argv);
}
@@ -1183,7 +1184,7 @@ static int pseudo_exec(struct child_prog *child)
static void insert_job(struct job *newjob, int inbg)
{
struct job *thejob;
- struct jobset *j_list=newjob->job_list;
+ struct jobset *j_list = newjob->job_list;
/* find the ID for thejob to use */
newjob->jobid = 1;
@@ -1205,14 +1206,14 @@ 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 ENABLE_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 */
printf("[%d] %d\n", thejob->jobid,
newjob->progs[newjob->num_progs - 1].pid);
last_jobid = newjob->jobid;
- last_bg_pid=newjob->progs[newjob->num_progs - 1].pid;
+ last_bg_pid = newjob->progs[newjob->num_progs - 1].pid;
} else {
newjob->job_list->fg = thejob;
@@ -1237,10 +1238,11 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
child = & (newjob->progs[i]);
if ((i + 1) < newjob->num_progs) {
- if (pipe(pipefds)<0) bb_perror_msg_and_die("pipe");
+ if (pipe(pipefds) < 0)
+ bb_perror_msg_and_die("pipe");
nextout = pipefds[1];
} else {
- if (outpipe[1]!=-1) {
+ if (outpipe[1] != -1) {
nextout = outpipe[1];
} else {
nextout = 1;
@@ -1288,9 +1290,10 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
signal(SIGCHLD, SIG_DFL);
/* Close all open filehandles. */
- while(close_me_list) close((long)llist_pop(&close_me_list));
+ while (close_me_list)
+ close((long)llist_pop(&close_me_list));
- if (outpipe[1]!=-1) {
+ if (outpipe[1] != -1) {
close(outpipe[0]);
}
if (nextin != 0) {
@@ -1310,7 +1313,7 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
pseudo_exec(child);
}
- if (outpipe[1]!=-1) {
+ if (outpipe[1] != -1) {
close(outpipe[1]);
}
@@ -1342,7 +1345,7 @@ static int busy_loop(FILE * input)
int i;
int inbg = 0;
int status;
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_LASH_JOB_CONTROL
pid_t parent_pgrp;
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(shell_terminal);
@@ -1374,8 +1377,8 @@ static int busy_loop(FILE * input)
if (!parse_command(&next_command, &newjob, &inbg) &&
newjob.num_progs) {
- int pipefds[2] = {-1,-1};
- debug_printf( "job=%p fed to run_command by busy_loop()'\n",
+ int pipefds[2] = { -1, -1 };
+ debug_printf("job=%p fed to run_command by busy_loop()'\n",
&newjob);
run_command(&newjob, inbg, pipefds);
}
@@ -1390,9 +1393,9 @@ static int busy_loop(FILE * input)
while (!job_list.fg->progs[i].pid ||
job_list.fg->progs[i].is_stopped == 1) i++;
- if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0) {
+ if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED) < 0) {
if (errno != ECHILD) {
- bb_perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid);
+ bb_perror_msg_and_die("waitpid(%d)", job_list.fg->progs[i].pid);
}
}
@@ -1401,7 +1404,7 @@ static int busy_loop(FILE * input)
job_list.fg->running_progs--;
job_list.fg->progs[i].pid = 0;
- last_return_code=WEXITSTATUS(status);
+ last_return_code = WEXITSTATUS(status);
if (!job_list.fg->running_progs) {
/* child exited */
@@ -1409,7 +1412,7 @@ static int busy_loop(FILE * input)
job_list.fg = NULL;
}
}
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_LASH_JOB_CONTROL
else {
/* the child was stopped */
job_list.fg->stopped_progs++;
@@ -1433,7 +1436,7 @@ static int busy_loop(FILE * input)
}
free(command);
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_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");
@@ -1446,10 +1449,10 @@ static int busy_loop(FILE * input)
return 0;
}
-#ifdef CONFIG_FEATURE_CLEAN_UP
+#if ENABLE_FEATURE_CLEAN_UP
static void free_memory(void)
{
- if (cwd && cwd!=bb_msg_unknown) {
+ if (cwd && cwd != bb_msg_unknown) {
free((char*)cwd);
}
if (local_pending_command)
@@ -1463,7 +1466,7 @@ static void free_memory(void)
void free_memory(void);
#endif
-#ifdef CONFIG_LASH_JOB_CONTROL
+#if ENABLE_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 */
@@ -1519,7 +1522,7 @@ int lash_main(int argc_l, char **argv_l)
close_me_list = NULL;
job_list.head = NULL;
job_list.fg = NULL;
- last_return_code=1;
+ last_return_code = 1;
if (argv[0] && argv[0][0] == '-') {
FILE *prof_input;
@@ -1548,9 +1551,9 @@ int lash_main(int argc_l, char **argv_l)
* standard input is a terminal
* standard output is a terminal
* Refer to Posix.2, the description of the `sh' utility. */
- if (argv[optind]==NULL && input==stdin &&
- isatty(STDIN_FILENO) && isatty(STDOUT_FILENO))
- {
+ if (argv[optind] == NULL && input == stdin
+ && isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)
+ ) {
opt |= LASH_OPT_i;
}
setup_job_control();
generated by cgit v1.1 at 2024-12-27 12:19:34 +0000