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-rw-r--r--shell/lash.c180
1 files changed, 116 insertions, 64 deletions
diff --git a/shell/lash.c b/shell/lash.c
index 67d6e4f51..49fb6b536 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -39,11 +39,15 @@
//#define BB_FEATURE_SH_BACKTICKS
//
//If, then, else, etc. support.. This should now behave basically
-//like any other Bourne shell...
+//like any other Bourne shell -- sortof...
#define BB_FEATURE_SH_IF_EXPRESSIONS
//
-/* This is currently a little broken... */
-//#define HANDLE_CONTINUATION_CHARS
+/* This is currently sortof broken, only for the brave... */
+#undef HANDLE_CONTINUATION_CHARS
+//
+/* This would be great -- if wordexp wouldn't strip all quoting
+ * out from the target strings... As is, a parser needs */
+#undef BB_FEATURE_SH_WORDEXP
//
//For debugging/development on the shell only...
//#define DEBUG_SHELL
@@ -61,10 +65,9 @@
#include <unistd.h>
#include <getopt.h>
-//#undef __GLIBC__
-//#undef __UCLIBC__
+#undef BB_FEATURE_SH_WORDEXP
-#if ( (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) ) || defined (__UCLIBC__)
+#if BB_FEATURE_SH_WORDEXP
#include <wordexp.h>
#define expand_t wordexp_t
#undef BB_FEATURE_SH_BACKTICKS
@@ -227,6 +230,10 @@ static int show_x_trace;
static char syntax_err[]="syntax error near unexpected token";
#endif
+static char *PS1;
+static char *PS2;
+
+
#ifdef DEBUG_SHELL
static inline void debug_printf(const char *format, ...)
{
@@ -286,7 +293,7 @@ static int builtin_cd(struct child_prog *child)
else
newdir = child->argv[1];
if (chdir(newdir)) {
- printf("cd: %s: %s\n", newdir, strerror(errno));
+ printf("cd: %s: %m\n", newdir);
return EXIT_FAILURE;
}
getcwd(cwd, sizeof(char)*MAX_LINE);
@@ -425,13 +432,20 @@ static int builtin_pwd(struct child_prog *dummy)
static int builtin_export(struct child_prog *child)
{
int res;
+ char *v = child->argv[1];
- if (child->argv[1] == NULL) {
+ if (v == NULL) {
return (builtin_env(child));
}
- res = putenv(child->argv[1]);
+ res = putenv(v);
if (res)
- fprintf(stderr, "export: %s\n", strerror(errno));
+ fprintf(stderr, "export: %m\n");
+#ifndef BB_FEATURE_SIMPLE_PROMPT
+ if (strncmp(v, "PS1=", 4)==0)
+ PS1 = getenv("PS1");
+ else if (strncmp(v, "PS2=", 4)==0)
+ PS2 = getenv("PS2");
+#endif
return (res);
}
@@ -461,7 +475,7 @@ static int builtin_read(struct child_prog *child)
if((s = strdup(string)))
res = putenv(s);
if (res)
- fprintf(stderr, "read: %s\n", strerror(errno));
+ fprintf(stderr, "read: %m\n");
}
else
fgets(string, sizeof(string), stdin);
@@ -759,8 +773,7 @@ static int setup_redirects(struct child_prog *prog, int squirrel[])
if (openfd < 0) {
/* this could get lost if stderr has been redirected, but
bash and ash both lose it as well (though zsh doesn't!) */
- error_msg("error opening %s: %s", redir->filename,
- strerror(errno));
+ perror_msg("error opening %s", redir->filename);
return 1;
}
@@ -790,57 +803,40 @@ static void restore_redirects(int squirrel[])
}
}
-#if defined(BB_FEATURE_SH_SIMPLE_PROMPT)
-static char* setup_prompt_string(int state)
+static inline void cmdedit_set_initial_prompt(void)
{
- char prompt_str[BUFSIZ];
-
- /* Set up the prompt */
- if (state == 0) {
- /* simple prompt */
- sprintf(prompt_str, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# ");
- } else {
- strcpy(prompt_str,"> ");
- }
-
- return(strdup(prompt_str)); /* Must free this memory */
-}
-
+#ifdef BB_FEATURE_SIMPLE_PROMPT
+ PS1 = NULL;
+ PS2 = "> ";
#else
+ PS1 = getenv("PS1");
+ if(PS1==0) {
+ PS1 = "\\w \\$ ";
+ }
+ PS2 = getenv("PS2");
+ if(PS2==0)
+ PS2 = "> ";
+#endif
+}
-static char* setup_prompt_string(int state)
+static inline void setup_prompt_string(char **prompt_str)
{
- char user[9],buf[255],*s;
- char prompt[3];
- char prompt_str[BUFSIZ];
-
+#ifdef BB_FEATURE_SIMPLE_PROMPT
/* Set up the prompt */
- if (state == 0) {
- /* get User Name and setup prompt */
- strcpy(prompt,( geteuid() != 0 ) ? "$ ":"# ");
- my_getpwuid(user, geteuid());
-
- /* get HostName */
- gethostname(buf, 255);
- s = strchr(buf, '.');
- if (s) {
- *s = 0;
- }
+ if (shell_context == 0) {
+ if (PS1)
+ free(PS1);
+ PS1=xmalloc(strlen(cwd)+4);
+ sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# ");
+ *prompt_str = PS1;
} else {
- strcpy(prompt,"> ");
+ *prompt_str = PS2;
}
-
- if (state == 0) {
- snprintf(prompt_str, BUFSIZ-1, "[%s@%s %s]%s", user, buf,
- get_last_path_component(cwd), prompt);
- } else {
- sprintf(prompt_str, "%s", prompt);
- }
- return(strdup(prompt_str)); /* Must free this memory */
+#else
+ *prompt_str = (shell_context==0)? PS1 : PS2;
+#endif
}
-#endif
-
static int get_command(FILE * source, char *command)
{
char *prompt_str;
@@ -857,9 +853,9 @@ static int get_command(FILE * source, char *command)
}
if (source == stdin) {
- prompt_str = setup_prompt_string(shell_context);
+ setup_prompt_string(&prompt_str);
-#ifdef BB_FEATURE_SH_COMMAND_EDITING
+#ifdef BB_FEATURE_COMMAND_EDITING
/*
** enable command line editing only while a command line
** is actually being read; otherwise, we'll end up bequeathing
@@ -868,11 +864,9 @@ static int get_command(FILE * source, char *command)
*/
cmdedit_read_input(prompt_str, command);
cmdedit_terminate();
- free(prompt_str);
return 0;
#else
fputs(prompt_str, stdout);
- free(prompt_str);
#endif
}
@@ -910,25 +904,72 @@ static char* itoa(register int i)
}
#endif
+#if defined BB_FEATURE_SH_ENVIRONMENT && ! defined BB_FEATURE_SH_WORDEXP
+char * strsep_space( char *string, int * index)
+{
+ char *token, *begin;
+
+ begin = string;
+
+ /* Short circuit the trivial case */
+ if ( !string || ! string[*index])
+ return NULL;
+
+ /* Find the end of the token. */
+ while( string && string[*index] && !isspace(string[*index]) ) {
+ (*index)++;
+ }
+
+ /* Find the end of any whitespace trailing behind
+ * the token and let that be part of the token */
+ while( string && string[*index] && isspace(string[*index]) ) {
+ (*index)++;
+ }
+
+ if (! string && *index==0) {
+ /* Nothing useful was found */
+ return NULL;
+ }
+
+ token = xmalloc(*index);
+ token[*index] = '\0';
+ strncpy(token, string, *index);
+
+ return token;
+}
+#endif
+
+
static int expand_arguments(char *command)
{
#ifdef BB_FEATURE_SH_ENVIRONMENT
expand_t expand_result;
char *src, *dst, *var;
+ int index = 0;
int i=0, length, total_length=0, retval;
const char *out_of_space = "out of space during expansion";
#endif
/* get rid of the terminating \n */
chomp(command);
+
+ /* Fix up escape sequences to be the Real Thing(tm) */
+ while( command && command[index]) {
+ if (command[index] == '\\') {
+ char *tmp = command+index+1;
+ command[index+1] = process_escape_sequence( &tmp );
+ memmove(command+index, command+index+1, strlen(command+index));
+ }
+ index++;
+ }
#ifdef BB_FEATURE_SH_ENVIRONMENT
-#if ( (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) ) || defined (__UCLIBC__)
+#if BB_FEATURE_SH_WORDEXP
/* This first part uses wordexp() which is a wonderful C lib
* function which expands nearly everything. */
- retval = wordexp (command, &expand_result, 0);
+ retval = wordexp (command, &expand_result, WRDE_SHOWERR);
if (retval == WRDE_NOSPACE) {
/* Mem may have been allocated... */
wordfree (&expand_result);
@@ -970,15 +1011,17 @@ static int expand_arguments(char *command)
{
int flags = GLOB_NOCHECK|GLOB_BRACE|GLOB_TILDE;
- char * tmpcmd, *cmd, *cmd_copy;
+ char *tmpcmd, *cmd, *cmd_copy;
/* We need a clean copy, so strsep can mess up the copy while
* we write stuff into the original (in a minute) */
cmd = cmd_copy = strdup(command);
*command = '\0';
- for (tmpcmd = cmd; (tmpcmd = strsep(&cmd, " \t")) != NULL;) {
+ for (index = 0, tmpcmd = cmd;
+ (tmpcmd = strsep_space(cmd, &index)) != NULL; cmd += index, index=0) {
if (*tmpcmd == '\0')
break;
retval = glob(tmpcmd, flags, NULL, &expand_result);
+ free(tmpcmd); /* Free mem allocated by strsep_space */
if (retval == GLOB_NOSPACE) {
/* Mem may have been allocated... */
globfree (&expand_result);
@@ -1711,7 +1754,8 @@ 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 being fed to run_command by busy_loop()'\n", &newjob);
+ debug_printf( "job=%p fed to run_command by busy_loop()'\n",
+ &newjob);
run_command(&newjob, inbg, pipefds);
}
else {
@@ -1879,5 +1923,13 @@ int shell_main(int argc_l, char **argv_l)
atexit(free_memory);
#endif
+#ifdef BB_FEATURE_COMMAND_EDITING
+ cmdedit_set_initial_prompt();
+#else
+ PS1 = NULL;
+ PS2 = "> ";
+#endif
+
return (busy_loop(input));
}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 09:05:31 +0000