*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
+
+#include "busybox.h"
#include <ctype.h> /* isalpha, isdigit */
#include <unistd.h> /* getpid */
#include <stdlib.h> /* getenv, atoi */
/* #include <dmalloc.h> */
/* #define DEBUG_SHELL */
-#if 1
-#include "busybox.h"
#include "cmdedit.h"
-#else
-#define bb_applet_name "hush"
-#include "standalone.h"
-#define hush_main main
-#undef CONFIG_FEATURE_SH_FANCY_PROMPT
-#define BB_BANNER ""
-#endif
+
#define SPECIAL_VAR_SYMBOL 03
#define FLAG_EXIT_FROM_LOOP 1
#define FLAG_PARSE_SEMICOLON (1 << 1) /* symbol ';' is special for parser */
};
/* belongs in busybox.h */
-static inline int max(int a, int b) {
+static int max(int a, int b) {
return (a>b)?a:b;
}
vfprintf(stderr, format, args);
va_end(args);
}
+/* broken, of course, but OK for testing */
+static char *indenter(int i)
+{
+ static char blanks[]=" ";
+ return &blanks[sizeof(blanks)-i-1];
+}
#else
-static inline void debug_printf(const char *format ATTRIBUTE_UNUSED, ...) { }
+#define debug_printf(...) do {;} while(0);
#endif
#define final_printf debug_printf
static void __syntax(char *file, int line) {
bb_error_msg("syntax error %s:%d", file, line);
}
-#define syntax() __syntax(__FILE__, __LINE__)
+// NB: was __FILE__, but that produces full path sometimess, so...
+#define syntax() __syntax("hush.c", __LINE__)
/* Index of subroutines: */
/* function prototypes for builtins */
static void mark_closed(int fd);
static void close_all(void);
/* "run" the final data structures: */
-static char *indenter(int i);
static int free_pipe_list(struct pipe *head, int indent);
static int free_pipe(struct pipe *pi, int indent);
/* really run the final data structures: */
/* Table of built-in functions. They can be forked or not, depending on
* context: within pipes, they fork. As simple commands, they do not.
* When used in non-forking context, they can change global variables
- * in the parent shell process. If forked, of course they can not.
+ * in the parent shell process. If forked, of course they cannot.
* For example, 'unset foo | whatever' will parse and run, but foo will
* still be set at the end. */
static const struct built_in_command bltins[] = {
char *name = child->argv[1];
if (name == NULL) {
- return (builtin_env(child));
+ return builtin_env(child);
}
name = strdup(name);
} else
res = -1;
if (res)
- fprintf(stderr, "read: %m\n");
+ bb_perror_msg("read");
free(var); /* So not move up to avoid breaking errno */
return res;
} else {
/* XXX search through $PATH is missing */
input = fopen(child->argv[1], "r");
if (!input) {
- bb_error_msg("Couldn't open file '%s'", child->argv[1]);
+ bb_error_msg("cannot open '%s'", child->argv[1]);
return EXIT_FAILURE;
}
status = parse_file_outer(input);
mark_closed(fileno(input));
fclose(input);
- return (status);
+ return status;
}
static int builtin_umask(struct child_prog *child)
return *i->p;
}
-static inline void cmdedit_set_initial_prompt(void)
+static void cmdedit_set_initial_prompt(void)
{
#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
PS1 = NULL;
#endif
}
-static inline void setup_prompt_string(int promptmode, char **prompt_str)
+static void setup_prompt_string(int promptmode, char **prompt_str)
{
debug_printf("setup_prompt_string %d ",promptmode);
#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
#endif
debug_printf("exec of %s\n",child->argv[0]);
execvp(child->argv[0],child->argv);
- bb_perror_msg("couldn't exec: %s",child->argv[0]);
+ bb_perror_msg("cannot exec: %s",child->argv[0]);
_exit(1);
} else if (child->group) {
debug_printf("runtime nesting to group\n");
if (i==fg_pipe->num_progs-1)
rcode=WEXITSTATUS(status);
(fg_pipe->num_progs)--;
- return(rcode);
+ return rcode;
}
}
}
/* child stopped */
pi->stopped_progs++;
pi->progs[prognum].is_stopped = 1;
-
-#if 0
- /* Printing this stuff is a pain, since it tends to
- * overwrite the prompt an inconveinient moments. So
- * don't do that. */
- if (pi->stopped_progs == pi->num_progs) {
- printf("\n"JOB_STATUS_FORMAT, pi->jobid, "Stopped", pi->text);
- }
-#endif
}
}
return -1;
}
-/* Figure out our controlling tty, checking in order stderr,
- * stdin, and stdout. If check_pgrp is set, also check that
- * we belong to the foreground process group associated with
- * that tty. The value of shell_terminal is needed in order to call
- * tcsetpgrp(shell_terminal, ...); */
-#if 0
-static void controlling_tty(int check_pgrp)
-{
- pid_t curpgrp;
-
- if ((curpgrp = tcgetpgrp(shell_terminal = 2)) < 0
- && (curpgrp = tcgetpgrp(shell_terminal = 0)) < 0
- && (curpgrp = tcgetpgrp(shell_terminal = 1)) < 0)
- goto shell_terminal_error;
-
- if (check_pgrp && curpgrp != getpgid(0))
- goto shell_terminal_error;
-
- return;
-
-shell_terminal_error:
- shell_terminal = -1;
- return;
-}
-#endif
-
/* run_pipe_real() starts all the jobs, but doesn't wait for anything
* to finish. See checkjobs().
*
* Builtins within pipes have to fork anyway, and are handled in
* pseudo_exec. "echo foo | read bar" doesn't work on bash, either.
*/
- if (pi->num_progs == 1) child = & (pi->progs[0]);
+ child = & (pi->progs[0]);
if (pi->num_progs == 1 && child->group && child->subshell == 0) {
int squirrel[] = {-1, -1, -1};
int rcode;
* variable. */
int export_me=0;
char *name, *value;
- name = bb_xstrdup(child->argv[i]);
+ name = xstrdup(child->argv[i]);
debug_printf("Local environment set: %s\n", name);
value = strchr(name, '=');
if (value)
return rcode;
}
-/* broken, of course, but OK for testing */
-static char *indenter(int i)
-{
- static char blanks[]=" ";
- return &blanks[sizeof(blanks)-i-1];
-}
-
/* return code is the exit status of the pipe */
static int free_pipe(struct pipe *pi, int indent)
{
struct child_prog *child;
struct redir_struct *r, *rnext;
int a, i, ret_code=0;
- char *ind = indenter(indent);
if (pi->stopped_progs > 0)
return ret_code;
- final_printf("%s run pipe: (pid %d)\n",ind,getpid());
+ final_printf("%s run pipe: (pid %d)\n",indenter(indent),getpid());
for (i=0; i<pi->num_progs; i++) {
child = &pi->progs[i];
- final_printf("%s command %d:\n",ind,i);
+ final_printf("%s command %d:\n",indenter(indent),i);
if (child->argv) {
for (a=0,p=child->argv; *p; a++,p++) {
- final_printf("%s argv[%d] = %s\n",ind,a,*p);
+ final_printf("%s argv[%d] = %s\n",indenter(indent),a,*p);
}
globfree(&child->glob_result);
child->argv=NULL;
} else if (child->group) {
- final_printf("%s begin group (subshell:%d)\n",ind, child->subshell);
+ final_printf("%s begin group (subshell:%d)\n",indenter(indent), child->subshell);
ret_code = free_pipe_list(child->group,indent+3);
- final_printf("%s end group\n",ind);
+ final_printf("%s end group\n",indenter(indent));
} else {
- final_printf("%s (nil)\n",ind);
+ final_printf("%s (nil)\n",indenter(indent));
}
for (r=child->redirects; r; r=rnext) {
- final_printf("%s redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
+ final_printf("%s redirect %d%s", indenter(indent), r->fd, redir_table[r->type].descrip);
if (r->dup == -1) {
/* guard against the case >$FOO, where foo is unset or blank */
if (r->word.gl_pathv) {
{
int rcode=0; /* if list has no members */
struct pipe *pi, *next;
- char *ind = indenter(indent);
for (pi=head; pi; pi=next) {
- final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
+ final_printf("%s pipe reserved mode %d\n", indenter(indent), pi->r_mode);
rcode = free_pipe(pi, indent);
- final_printf("%s pipe followup code %d\n", ind, pi->followup);
+ final_printf("%s pipe followup code %d\n", indenter(indent), pi->followup);
next=pi->next;
pi->next=NULL;
free(pi);
return 0;
}
-#if 0
-static void globprint(glob_t *pglob)
-{
- int i;
- debug_printf("glob_t at %p:\n", pglob);
- debug_printf(" gl_pathc=%d gl_pathv=%p gl_offs=%d gl_flags=%d\n",
- pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
- for (i=0; i<pglob->gl_pathc; i++)
- debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
- pglob->gl_pathv[i], pglob->gl_pathv[i]);
-}
-#endif
-
static int xglob(o_string *dest, int flags, glob_t *pglob)
{
int gr;
static FILE *generate_stream_from_list(struct pipe *head)
{
FILE *pf;
-#if 1
int pid, channel[2];
if (pipe(channel)<0) bb_perror_msg_and_die("pipe");
#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
dup2(channel[1],1);
close(channel[1]);
}
-#if 0
-#define SURROGATE "surrogate response"
- write(1,SURROGATE,sizeof(SURROGATE));
- _exit(run_list(head));
-#else
_exit(run_list_real(head)); /* leaks memory */
-#endif
}
debug_printf("forked child %d\n",pid);
close(channel[1]);
pf = fdopen(channel[0],"r");
debug_printf("pipe on FILE *%p\n",pf);
-#else
- free_pipe_list(head,0);
- pf=popen("echo surrogate response","r");
- debug_printf("started fake pipe on FILE *%p\n",pf);
-#endif
return pf;
}
return 1; /* syntax error, groups and arglists don't mix */
}
initialize_context(&sub);
- switch(ch) {
+ switch (ch) {
case '(': endch=')'; child->subshell=1; break;
case '{': endch='}'; break;
default: syntax(); /* really logic error */
debug_printf("leaving parse_stream (triggered)\n");
return 0;
}
-#if 0
- if (ch=='\n') {
- /* Yahoo! Time to run with it! */
- done_pipe(ctx,PIPE_SEQ);
- run_list(ctx->list_head);
- initialize_context(ctx);
- }
-#endif
if (m!=2) switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
/* Initialize some more globals to non-zero values */
set_cwd();
-#ifdef CONFIG_FEATURE_COMMAND_EDITING
- cmdedit_set_initial_prompt();
-#else
- PS1 = NULL;
-#endif
+ if (ENABLE_FEATURE_COMMAND_EDITING) cmdedit_set_initial_prompt();
+ else PS1 = NULL;
PS2 = "> ";
/* initialize our shell local variables with the values
debug_printf("\nrunning script '%s'\n", argv[optind]);
global_argv = argv+optind;
global_argc = argc-optind;
- input = bb_xfopen(argv[optind], "r");
+ input = xfopen(argv[optind], "r");
opt = parse_file_outer(input);
#ifdef CONFIG_FEATURE_CLEAN_UP
#endif
final_return:
- return(opt?opt:last_return_code);
+ return opt ? opt : last_return_code;
}
static char *insert_var_value(char *inp)
projects / oweals / busybox.git / blobdiff