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More sh updates (with related changes to everything else). Switched

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to using getopt and cleaned up the resulting mess.  if-then-else-fi
is now basically working (given a bunch of constraints).
 -Erik
This commit is contained in:
Eric Andersen 2000-07-28 15:14:45 +00:00
parent 6a99aaf020
commit 501c88b245
11 changed files with 421 additions and 193 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
applets/busybox.c
View File

@ -337,7 +337,7 @@ const struct BB_applet applets[] = {
{0,NULL,0,NULL}
};
char *applet_name;
const char *applet_name;
#ifdef BB_FEATURE_INSTALLER
/*
@ -416,7 +416,7 @@ static int install_links(const char *busybox, int use_symbolic_links)
int main(int argc, char **argv)
{
char *s;
const char *s;
const struct BB_applet *a = applets;
applet_name = "busybox";
@ -455,7 +455,7 @@ int main(int argc, char **argv)
applet_name = s;
}
*argv = applet_name;
*argv = (char*)applet_name;
#ifdef BB_SH
/* Add in a special case hack -- whenever **argv == '-'

6
busybox.c
View File

@ -337,7 +337,7 @@ const struct BB_applet applets[] = {
{0,NULL,0,NULL}
};
char *applet_name;
const char *applet_name;
#ifdef BB_FEATURE_INSTALLER
/*
@ -416,7 +416,7 @@ static int install_links(const char *busybox, int use_symbolic_links)
int main(int argc, char **argv)
{
char *s;
const char *s;
const struct BB_applet *a = applets;
applet_name = "busybox";
@ -455,7 +455,7 @@ int main(int argc, char **argv)
applet_name = s;
}
*argv = applet_name;
*argv = (char*)applet_name;
#ifdef BB_SH
/* Add in a special case hack -- whenever **argv == '-'

25
cmdedit.c
View File

@ -84,6 +84,7 @@ static int cmdedit_termw = 80; /* actual terminal width */
static int cmdedit_scroll = 27; /* width of EOL scrolling region */
static int history_counter = 0; /* Number of commands in history list */
static int reset_term = 0; /* Set to true if the terminal needs to be reset upon exit */
static int exithandler_set = 0; /* Set to true when atexit() has been called */
struct history {
char *s;
@ -709,10 +710,32 @@ extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
extern void cmdedit_init(void)
{
atexit(cmdedit_reset_term);
if(exithandler_set == 0) {
atexit(cmdedit_reset_term); /* be sure to do this only once */
exithandler_set = 1;
}
signal(SIGKILL, clean_up_and_die);
signal(SIGINT, clean_up_and_die);
signal(SIGQUIT, clean_up_and_die);
signal(SIGTERM, clean_up_and_die);
}
/*
** Undo the effects of cmdedit_init() as good as we can:
** I am not aware of a way to revoke an atexit() handler,
** but, fortunately, our particular handler can be made
** a no-op by setting reset_term = 0.
*/
extern void cmdedit_terminate(void)
{
cmdedit_reset_term();
reset_term = 0;
signal(SIGKILL, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
}
#endif /* BB_FEATURE_SH_COMMAND_EDITING */

1
cmdedit.h
View File

@ -11,6 +11,7 @@
typedef size_t (*cmdedit_strwidth_proc)(char *);
void cmdedit_init(void);
void cmdedit_terminate(void);
void cmdedit_read_input(char* promptStr, char* command); /* read a line of input */
void cmdedit_setwidth(int); /* specify width of screen */
void cmdedit_histadd(char *); /* adds entries to hist */

3
internal.h
View File

@ -317,7 +317,7 @@ extern const char which_usage[];
extern const char whoami_usage[];
extern const char yes_usage[];
extern char *applet_name;
extern const char *applet_name;
extern void usage(const char *usage) __attribute__ ((noreturn));
extern void errorMsg(const char *s, ...) __attribute__ ((format (printf, 1, 2)));
@ -380,6 +380,7 @@ extern void xregcomp(regex_t *preg, const char *regex, int cflags);
#ifndef DMALLOC
extern void *xmalloc (size_t size);
extern void *xrealloc(void *old, size_t size);
extern void *xcalloc(size_t nmemb, size_t size);
extern char *xstrdup (const char *s);
#endif
extern char *xstrndup (const char *s, int n);

177
lash.c
View File

@ -29,6 +29,7 @@
//#define BB_FEATURE_SH_BACKTICKS
//#define BB_FEATURE_SH_IF_EXPRESSIONS
//#define BB_FEATURE_SH_ENVIRONMENT
//#define DEBUG_SHELL
#include "internal.h"
@ -43,6 +44,7 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <getopt.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
@ -172,6 +174,7 @@ static char **argv;
#ifdef BB_FEATURE_SH_ENVIRONMENT
static int lastBgPid=-1;
static int lastReturnCode=-1;
static int showXtrace=FALSE;
#endif
@ -382,14 +385,23 @@ static int builtin_if(struct job *cmd, struct jobSet *jobList)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'if' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'if' now testing '%s'\n", local_pending_command);
#endif
status = busy_loop(NULL); /* Frees local_pending_command */
printf("if test returned ");
#ifdef DEBUG_SHELL
fprintf(stderr, "if test returned ");
#endif
if (status == 0) {
printf("TRUE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "TRUE\n");
#endif
cmd->jobContext |= IF_TRUE_CONTEXT;
} else {
printf("FALSE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "FALSE\n");
#endif
cmd->jobContext |= IF_FALSE_CONTEXT;
}
@ -407,7 +419,7 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was FALSE, skip the 'then' stuff */
if (cmd->jobContext & IF_TRUE_CONTEXT) {
if (cmd->jobContext & IF_FALSE_CONTEXT) {
return TRUE;
}
@ -418,7 +430,10 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'then' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'then' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -433,7 +448,7 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was TRUE, skip the 'else' stuff */
if (cmd->jobContext & IF_FALSE_CONTEXT) {
if (cmd->jobContext & IF_TRUE_CONTEXT) {
return TRUE;
}
@ -444,7 +459,10 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'else' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'else' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -457,7 +475,9 @@ static int builtin_fi(struct job *cmd, struct jobSet *junk)
}
/* Clear out the if and then context bits */
cmd->jobContext &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT);
printf("Hit an fi -- jobContext=%d\n", cmd->jobContext);
#ifdef DEBUG_SHELL
fprintf(stderr, "Hit an fi -- jobContext=%d\n", cmd->jobContext);
#endif
return TRUE;
}
#endif
@ -633,12 +653,23 @@ static int getCommand(FILE * source, char *command)
if (source == stdin) {
#ifdef BB_FEATURE_SH_COMMAND_EDITING
int len;
/*
** enable command line editing only while a command line
** is actually being read; otherwise, we'll end up bequeathing
** atexit() handlers and other unwanted stuff to our
** child processes (rob@sysgo.de)
*/
cmdedit_init();
signal(SIGWINCH, win_changed);
len=fprintf(stdout, "%s %s", cwd, prompt);
fflush(stdout);
promptStr=(char*)xmalloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, command);
free( promptStr);
cmdedit_terminate();
signal(SIGWINCH, SIG_DFL);
return 0;
#else
fprintf(stdout, "%s %s", cwd, prompt);
@ -944,6 +975,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
prog->numRedirections = 0;
prog->redirections = NULL;
prog->freeGlob = 0;
prog->isStopped = 0;
argc_l = 0;
argvAlloced = 5;
@ -1108,10 +1140,20 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
}
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
if (showXtrace==TRUE) {
int j;
fprintf(stderr, "+ ");
for (j = 0; newJob->progs[i].argv[j]; j++)
fprintf(stderr, "%s ", newJob->progs[i].argv[j]);
fprintf(stderr, "\n");
}
#endif
/* Check if the command matches any non-forking builtins */
for (x = bltins; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0 ) {
return (x->function(newJob, jobList));
return(x->function(newJob, jobList));
}
}
@ -1130,6 +1172,7 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
dup2(nextout, 1);
dup2(nextout, 2);
close(nextout);
close(pipefds[0]);
}
/* explicit redirections override pipes */
@ -1138,18 +1181,18 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* Check if the command matches any of the other builtins */
for (x = bltins_forking; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0) {
applet_name=x->cmd;
exit (x->function(newJob, jobList));
}
}
#ifdef BB_FEATURE_SH_STANDALONE_SHELL
/* Check if the command matches any busybox internal commands here */
/* TODO: Add matching when paths are appended (i.e. 'cat' currently
* works, but '/bin/cat' doesn't ) */
while (a->name != 0) {
if (strcmp(newJob->progs[i].argv[0], a->name) == 0) {
if (strcmp(get_last_path_component(newJob->progs[i].argv[0]), a->name) == 0) {
int argc_l;
char** argv=newJob->progs[i].argv;
for(argc_l=0;*argv!=NULL; argv++, argc_l++);
applet_name=a->name;
exit((*(a->main)) (argc_l, newJob->progs[i].argv));
}
a++;
@ -1275,15 +1318,18 @@ static int busy_loop(FILE * input)
jobList.fg->runningProgs--;
jobList.fg->progs[i].pid = 0;
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
#if 0
printf("'%s' exited -- return code %d\n", jobList.fg->text, lastReturnCode);
#endif
if (!jobList.fg->runningProgs) {
/* child exited */
removeJob(&jobList, jobList.fg);
jobList.fg = NULL;
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
} else {
/* the child was stopped */
jobList.fg->stoppedProgs++;
@ -1337,10 +1383,65 @@ void free_memory(void)
int shell_main(int argc_l, char **argv_l)
{
int opt;
FILE *input = stdin;
argc = argc_l;
argv = argv_l;
//if (argv[0] && argv[0][0] == '-') {
// builtin_source("/etc/profile");
//}
while ((opt = getopt(argc, argv, "cx")) > 0) {
switch (opt) {
case 'c':
input = NULL;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("sh: out of memory\n");
}
for(; optind<argc; optind++)
{
if (strlen(local_pending_command) + strlen(argv[optind]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[optind]));
if (local_pending_command==NULL)
fatalError("sh: command too long\n");
}
strcat(local_pending_command, argv[optind]);
if ( (optind + 1) < argc)
strcat(local_pending_command, " ");
}
break;
case 'x':
showXtrace = TRUE;
break;
default:
usage(shell_usage);
}
}
if (optind<1 && input == stdin) {
/* Looks like they want an interactive shell */
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 (1==(argc-optind)) {
input = fopen(argv[optind], "r");
if (!input) {
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
} else {
char *oldpath, *newpath;
oldpath = getenv("PATH");
newpath=(char*)xmalloc(strlen(oldpath)+12);
snprintf(newpath, strlen(oldpath)+9, "PATH=./:%s", oldpath);
putenv(newpath);
execvp(argv[optind], argv+optind);
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
/* initialize the cwd -- this is never freed...*/
cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1);
getcwd(cwd, sizeof(char)*MAX_LINE);
@ -1350,52 +1451,8 @@ int shell_main(int argc_l, char **argv_l)
#endif
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// builtin_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");
} else {
if (argv[1][0]=='-' && argv[1][1]=='c') {
int i;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("out of memory\n");
}
for(i=2; i<argc; i++)
{
if (strlen(local_pending_command) + strlen(argv[i]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[i]));
if (local_pending_command==NULL)
fatalError("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("Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
}
}
}
return (busy_loop(input));
}

177
sh.c
View File

@ -29,6 +29,7 @@
//#define BB_FEATURE_SH_BACKTICKS
//#define BB_FEATURE_SH_IF_EXPRESSIONS
//#define BB_FEATURE_SH_ENVIRONMENT
//#define DEBUG_SHELL
#include "internal.h"
@ -43,6 +44,7 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <getopt.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
@ -172,6 +174,7 @@ static char **argv;
#ifdef BB_FEATURE_SH_ENVIRONMENT
static int lastBgPid=-1;
static int lastReturnCode=-1;
static int showXtrace=FALSE;
#endif
@ -382,14 +385,23 @@ static int builtin_if(struct job *cmd, struct jobSet *jobList)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'if' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'if' now testing '%s'\n", local_pending_command);
#endif
status = busy_loop(NULL); /* Frees local_pending_command */
printf("if test returned ");
#ifdef DEBUG_SHELL
fprintf(stderr, "if test returned ");
#endif
if (status == 0) {
printf("TRUE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "TRUE\n");
#endif
cmd->jobContext |= IF_TRUE_CONTEXT;
} else {
printf("FALSE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "FALSE\n");
#endif
cmd->jobContext |= IF_FALSE_CONTEXT;
}
@ -407,7 +419,7 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was FALSE, skip the 'then' stuff */
if (cmd->jobContext & IF_TRUE_CONTEXT) {
if (cmd->jobContext & IF_FALSE_CONTEXT) {
return TRUE;
}
@ -418,7 +430,10 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'then' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'then' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -433,7 +448,7 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was TRUE, skip the 'else' stuff */
if (cmd->jobContext & IF_FALSE_CONTEXT) {
if (cmd->jobContext & IF_TRUE_CONTEXT) {
return TRUE;
}
@ -444,7 +459,10 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'else' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'else' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -457,7 +475,9 @@ static int builtin_fi(struct job *cmd, struct jobSet *junk)
}
/* Clear out the if and then context bits */
cmd->jobContext &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT);
printf("Hit an fi -- jobContext=%d\n", cmd->jobContext);
#ifdef DEBUG_SHELL
fprintf(stderr, "Hit an fi -- jobContext=%d\n", cmd->jobContext);
#endif
return TRUE;
}
#endif
@ -633,12 +653,23 @@ static int getCommand(FILE * source, char *command)
if (source == stdin) {
#ifdef BB_FEATURE_SH_COMMAND_EDITING
int len;
/*
** enable command line editing only while a command line
** is actually being read; otherwise, we'll end up bequeathing
** atexit() handlers and other unwanted stuff to our
** child processes (rob@sysgo.de)
*/
cmdedit_init();
signal(SIGWINCH, win_changed);
len=fprintf(stdout, "%s %s", cwd, prompt);
fflush(stdout);
promptStr=(char*)xmalloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, command);
free( promptStr);
cmdedit_terminate();
signal(SIGWINCH, SIG_DFL);
return 0;
#else
fprintf(stdout, "%s %s", cwd, prompt);
@ -944,6 +975,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
prog->numRedirections = 0;
prog->redirections = NULL;
prog->freeGlob = 0;
prog->isStopped = 0;
argc_l = 0;
argvAlloced = 5;
@ -1108,10 +1140,20 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
}
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
if (showXtrace==TRUE) {
int j;
fprintf(stderr, "+ ");
for (j = 0; newJob->progs[i].argv[j]; j++)
fprintf(stderr, "%s ", newJob->progs[i].argv[j]);
fprintf(stderr, "\n");
}
#endif
/* Check if the command matches any non-forking builtins */
for (x = bltins; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0 ) {
return (x->function(newJob, jobList));
return(x->function(newJob, jobList));
}
}
@ -1130,6 +1172,7 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
dup2(nextout, 1);
dup2(nextout, 2);
close(nextout);
close(pipefds[0]);
}
/* explicit redirections override pipes */
@ -1138,18 +1181,18 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* Check if the command matches any of the other builtins */
for (x = bltins_forking; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0) {
applet_name=x->cmd;
exit (x->function(newJob, jobList));
}
}
#ifdef BB_FEATURE_SH_STANDALONE_SHELL
/* Check if the command matches any busybox internal commands here */
/* TODO: Add matching when paths are appended (i.e. 'cat' currently
* works, but '/bin/cat' doesn't ) */
while (a->name != 0) {
if (strcmp(newJob->progs[i].argv[0], a->name) == 0) {
if (strcmp(get_last_path_component(newJob->progs[i].argv[0]), a->name) == 0) {
int argc_l;
char** argv=newJob->progs[i].argv;
for(argc_l=0;*argv!=NULL; argv++, argc_l++);
applet_name=a->name;
exit((*(a->main)) (argc_l, newJob->progs[i].argv));
}
a++;
@ -1275,15 +1318,18 @@ static int busy_loop(FILE * input)
jobList.fg->runningProgs--;
jobList.fg->progs[i].pid = 0;
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
#if 0
printf("'%s' exited -- return code %d\n", jobList.fg->text, lastReturnCode);
#endif
if (!jobList.fg->runningProgs) {
/* child exited */
removeJob(&jobList, jobList.fg);
jobList.fg = NULL;
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
} else {
/* the child was stopped */
jobList.fg->stoppedProgs++;
@ -1337,10 +1383,65 @@ void free_memory(void)
int shell_main(int argc_l, char **argv_l)
{
int opt;
FILE *input = stdin;
argc = argc_l;
argv = argv_l;
//if (argv[0] && argv[0][0] == '-') {
// builtin_source("/etc/profile");
//}
while ((opt = getopt(argc, argv, "cx")) > 0) {
switch (opt) {
case 'c':
input = NULL;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("sh: out of memory\n");
}
for(; optind<argc; optind++)
{
if (strlen(local_pending_command) + strlen(argv[optind]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[optind]));
if (local_pending_command==NULL)
fatalError("sh: command too long\n");
}
strcat(local_pending_command, argv[optind]);
if ( (optind + 1) < argc)
strcat(local_pending_command, " ");
}
break;
case 'x':
showXtrace = TRUE;
break;
default:
usage(shell_usage);
}
}
if (optind<1 && input == stdin) {
/* Looks like they want an interactive shell */
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 (1==(argc-optind)) {
input = fopen(argv[optind], "r");
if (!input) {
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
} else {
char *oldpath, *newpath;
oldpath = getenv("PATH");
newpath=(char*)xmalloc(strlen(oldpath)+12);
snprintf(newpath, strlen(oldpath)+9, "PATH=./:%s", oldpath);
putenv(newpath);
execvp(argv[optind], argv+optind);
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
/* initialize the cwd -- this is never freed...*/
cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1);
getcwd(cwd, sizeof(char)*MAX_LINE);
@ -1350,52 +1451,8 @@ int shell_main(int argc_l, char **argv_l)
#endif
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// builtin_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");
} else {
if (argv[1][0]=='-' && argv[1][1]=='c') {
int i;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("out of memory\n");
}
for(i=2; i<argc; i++)
{
if (strlen(local_pending_command) + strlen(argv[i]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[i]));
if (local_pending_command==NULL)
fatalError("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("Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
}
}
}
return (busy_loop(input));
}

25
shell/cmdedit.c
View File

@ -84,6 +84,7 @@ static int cmdedit_termw = 80; /* actual terminal width */
static int cmdedit_scroll = 27; /* width of EOL scrolling region */
static int history_counter = 0; /* Number of commands in history list */
static int reset_term = 0; /* Set to true if the terminal needs to be reset upon exit */
static int exithandler_set = 0; /* Set to true when atexit() has been called */
struct history {
char *s;
@ -709,10 +710,32 @@ extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
extern void cmdedit_init(void)
{
atexit(cmdedit_reset_term);
if(exithandler_set == 0) {
atexit(cmdedit_reset_term); /* be sure to do this only once */
exithandler_set = 1;
}
signal(SIGKILL, clean_up_and_die);
signal(SIGINT, clean_up_and_die);
signal(SIGQUIT, clean_up_and_die);
signal(SIGTERM, clean_up_and_die);
}
/*
** Undo the effects of cmdedit_init() as good as we can:
** I am not aware of a way to revoke an atexit() handler,
** but, fortunately, our particular handler can be made
** a no-op by setting reset_term = 0.
*/
extern void cmdedit_terminate(void)
{
cmdedit_reset_term();
reset_term = 0;
signal(SIGKILL, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
}
#endif /* BB_FEATURE_SH_COMMAND_EDITING */

1
shell/cmdedit.h
View File

@ -11,6 +11,7 @@
typedef size_t (*cmdedit_strwidth_proc)(char *);
void cmdedit_init(void);
void cmdedit_terminate(void);
void cmdedit_read_input(char* promptStr, char* command); /* read a line of input */
void cmdedit_setwidth(int); /* specify width of screen */
void cmdedit_histadd(char *); /* adds entries to hist */

177
shell/lash.c
View File

@ -29,6 +29,7 @@
//#define BB_FEATURE_SH_BACKTICKS
//#define BB_FEATURE_SH_IF_EXPRESSIONS
//#define BB_FEATURE_SH_ENVIRONMENT
//#define DEBUG_SHELL
#include "internal.h"
@ -43,6 +44,7 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#include <getopt.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
@ -172,6 +174,7 @@ static char **argv;
#ifdef BB_FEATURE_SH_ENVIRONMENT
static int lastBgPid=-1;
static int lastReturnCode=-1;
static int showXtrace=FALSE;
#endif
@ -382,14 +385,23 @@ static int builtin_if(struct job *cmd, struct jobSet *jobList)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'if' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'if' now testing '%s'\n", local_pending_command);
#endif
status = busy_loop(NULL); /* Frees local_pending_command */
printf("if test returned ");
#ifdef DEBUG_SHELL
fprintf(stderr, "if test returned ");
#endif
if (status == 0) {
printf("TRUE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "TRUE\n");
#endif
cmd->jobContext |= IF_TRUE_CONTEXT;
} else {
printf("FALSE\n");
#ifdef DEBUG_SHELL
fprintf(stderr, "FALSE\n");
#endif
cmd->jobContext |= IF_FALSE_CONTEXT;
}
@ -407,7 +419,7 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was FALSE, skip the 'then' stuff */
if (cmd->jobContext & IF_TRUE_CONTEXT) {
if (cmd->jobContext & IF_FALSE_CONTEXT) {
return TRUE;
}
@ -418,7 +430,10 @@ static int builtin_then(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'then' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'then' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -433,7 +448,7 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
return FALSE;
}
/* If the if result was TRUE, skip the 'else' stuff */
if (cmd->jobContext & IF_FALSE_CONTEXT) {
if (cmd->jobContext & IF_TRUE_CONTEXT) {
return TRUE;
}
@ -444,7 +459,10 @@ static int builtin_else(struct job *cmd, struct jobSet *junk)
status=strlen(charptr1);
local_pending_command = xmalloc(status+1);
strncpy(local_pending_command, charptr1, status);
printf("'else' now running '%s'\n", charptr1);
local_pending_command[status]='\0';
#ifdef DEBUG_SHELL
fprintf(stderr, "'else' now running '%s'\n", charptr1);
#endif
return( busy_loop(NULL));
}
@ -457,7 +475,9 @@ static int builtin_fi(struct job *cmd, struct jobSet *junk)
}
/* Clear out the if and then context bits */
cmd->jobContext &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT);
printf("Hit an fi -- jobContext=%d\n", cmd->jobContext);
#ifdef DEBUG_SHELL
fprintf(stderr, "Hit an fi -- jobContext=%d\n", cmd->jobContext);
#endif
return TRUE;
}
#endif
@ -633,12 +653,23 @@ static int getCommand(FILE * source, char *command)
if (source == stdin) {
#ifdef BB_FEATURE_SH_COMMAND_EDITING
int len;
/*
** enable command line editing only while a command line
** is actually being read; otherwise, we'll end up bequeathing
** atexit() handlers and other unwanted stuff to our
** child processes (rob@sysgo.de)
*/
cmdedit_init();
signal(SIGWINCH, win_changed);
len=fprintf(stdout, "%s %s", cwd, prompt);
fflush(stdout);
promptStr=(char*)xmalloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, command);
free( promptStr);
cmdedit_terminate();
signal(SIGWINCH, SIG_DFL);
return 0;
#else
fprintf(stdout, "%s %s", cwd, prompt);
@ -944,6 +975,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
prog->numRedirections = 0;
prog->redirections = NULL;
prog->freeGlob = 0;
prog->isStopped = 0;
argc_l = 0;
argvAlloced = 5;
@ -1108,10 +1140,20 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
}
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
if (showXtrace==TRUE) {
int j;
fprintf(stderr, "+ ");
for (j = 0; newJob->progs[i].argv[j]; j++)
fprintf(stderr, "%s ", newJob->progs[i].argv[j]);
fprintf(stderr, "\n");
}
#endif
/* Check if the command matches any non-forking builtins */
for (x = bltins; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0 ) {
return (x->function(newJob, jobList));
return(x->function(newJob, jobList));
}
}
@ -1130,6 +1172,7 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
dup2(nextout, 1);
dup2(nextout, 2);
close(nextout);
close(pipefds[0]);
}
/* explicit redirections override pipes */
@ -1138,18 +1181,18 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* Check if the command matches any of the other builtins */
for (x = bltins_forking; x->cmd; x++) {
if (strcmp(newJob->progs[i].argv[0], x->cmd) == 0) {
applet_name=x->cmd;
exit (x->function(newJob, jobList));
}
}
#ifdef BB_FEATURE_SH_STANDALONE_SHELL
/* Check if the command matches any busybox internal commands here */
/* TODO: Add matching when paths are appended (i.e. 'cat' currently
* works, but '/bin/cat' doesn't ) */
while (a->name != 0) {
if (strcmp(newJob->progs[i].argv[0], a->name) == 0) {
if (strcmp(get_last_path_component(newJob->progs[i].argv[0]), a->name) == 0) {
int argc_l;
char** argv=newJob->progs[i].argv;
for(argc_l=0;*argv!=NULL; argv++, argc_l++);
applet_name=a->name;
exit((*(a->main)) (argc_l, newJob->progs[i].argv));
}
a++;
@ -1275,15 +1318,18 @@ static int busy_loop(FILE * input)
jobList.fg->runningProgs--;
jobList.fg->progs[i].pid = 0;
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
#if 0
printf("'%s' exited -- return code %d\n", jobList.fg->text, lastReturnCode);
#endif
if (!jobList.fg->runningProgs) {
/* child exited */
removeJob(&jobList, jobList.fg);
jobList.fg = NULL;
}
#ifdef BB_FEATURE_SH_ENVIRONMENT
lastReturnCode=WEXITSTATUS(status);
#endif
} else {
/* the child was stopped */
jobList.fg->stoppedProgs++;
@ -1337,10 +1383,65 @@ void free_memory(void)
int shell_main(int argc_l, char **argv_l)
{
int opt;
FILE *input = stdin;
argc = argc_l;
argv = argv_l;
//if (argv[0] && argv[0][0] == '-') {
// builtin_source("/etc/profile");
//}
while ((opt = getopt(argc, argv, "cx")) > 0) {
switch (opt) {
case 'c':
input = NULL;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("sh: out of memory\n");
}
for(; optind<argc; optind++)
{
if (strlen(local_pending_command) + strlen(argv[optind]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[optind]));
if (local_pending_command==NULL)
fatalError("sh: command too long\n");
}
strcat(local_pending_command, argv[optind]);
if ( (optind + 1) < argc)
strcat(local_pending_command, " ");
}
break;
case 'x':
showXtrace = TRUE;
break;
default:
usage(shell_usage);
}
}
if (optind<1 && input == stdin) {
/* Looks like they want an interactive shell */
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 (1==(argc-optind)) {
input = fopen(argv[optind], "r");
if (!input) {
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
} else {
char *oldpath, *newpath;
oldpath = getenv("PATH");
newpath=(char*)xmalloc(strlen(oldpath)+12);
snprintf(newpath, strlen(oldpath)+9, "PATH=./:%s", oldpath);
putenv(newpath);
execvp(argv[optind], argv+optind);
fatalError("%s: %s\n", argv[optind], strerror(errno));
}
/* initialize the cwd -- this is never freed...*/
cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1);
getcwd(cwd, sizeof(char)*MAX_LINE);
@ -1350,52 +1451,8 @@ int shell_main(int argc_l, char **argv_l)
#endif
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// builtin_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");
} else {
if (argv[1][0]=='-' && argv[1][1]=='c') {
int i;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("out of memory\n");
}
for(i=2; i<argc; i++)
{
if (strlen(local_pending_command) + strlen(argv[i]) >= BUFSIZ) {
local_pending_command = realloc(local_pending_command,
strlen(local_pending_command) + strlen(argv[i]));
if (local_pending_command==NULL)
fatalError("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("Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
}
}
}
return (busy_loop(input));
}

10
utility.c
View File

@ -1465,13 +1465,21 @@ extern void *xmalloc(size_t size)
return ptr;
}
void *xrealloc(void *old, size_t size)
extern void *xrealloc(void *old, size_t size)
{
void *ptr = realloc(old, size);
if (!ptr)
fatalError(memory_exhausted);
return ptr;
}
extern void *xcalloc(size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (!ptr)
fatalError(memory_exhausted);
return ptr;
}
#endif
#if defined BB_FEATURE_NFSMOUNT