*/
#include "busybox.h"
-#include <ctype.h> /* isalpha, isdigit */
-#include <unistd.h> /* getpid */
-#include <stdlib.h> /* getenv, atoi */
-#include <string.h> /* strchr */
-#include <stdio.h> /* popen etc. */
#include <glob.h> /* glob, of course */
-#include <stdarg.h> /* va_list */
-#include <errno.h>
-#include <fcntl.h>
#include <getopt.h> /* should be pretty obvious */
-#include <sys/stat.h> /* ulimit */
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <signal.h>
+//#include <sys/wait.h>
+//#include <signal.h>
/* #include <dmalloc.h> */
/* #define DEBUG_SHELL */
struct pipe *pipe;
struct redir_struct *pending_redirect;
reserved_style w;
- int old_flag; /* for figuring out valid reserved words */
+ int old_flag; /* for figuring out valid reserved words */
struct p_context *stack;
- int type; /* define type of parser : ";$" common or special symbol */
+ int type; /* define type of parser : ";$" common or special symbol */
/* How about quoting status? */
};
struct redir_struct {
- redir_type type; /* type of redirection */
- int fd; /* file descriptor being redirected */
- int dup; /* -1, or file descriptor being duplicated */
- struct redir_struct *next; /* pointer to the next redirect in the list */
- glob_t word; /* *word.gl_pathv is the filename */
+ redir_type type; /* type of redirection */
+ int fd; /* file descriptor being redirected */
+ int dup; /* -1, or file descriptor being duplicated */
+ struct redir_struct *next; /* pointer to the next redirect in the list */
+ glob_t word; /* *word.gl_pathv is the filename */
};
struct child_prog {
- pid_t pid; /* 0 if exited */
- char **argv; /* program name and arguments */
- struct pipe *group; /* if non-NULL, first in group or subshell */
- int subshell; /* flag, non-zero if group must be forked */
- struct redir_struct *redirects; /* I/O redirections */
- glob_t glob_result; /* result of parameter globbing */
- int is_stopped; /* is the program currently running? */
- struct pipe *family; /* pointer back to the child's parent pipe */
- int sp; /* number of SPECIAL_VAR_SYMBOL */
+ pid_t pid; /* 0 if exited */
+ char **argv; /* program name and arguments */
+ struct pipe *group; /* if non-NULL, first in group or subshell */
+ int subshell; /* flag, non-zero if group must be forked */
+ struct redir_struct *redirects; /* I/O redirections */
+ glob_t glob_result; /* result of parameter globbing */
+ int is_stopped; /* is the program currently running? */
+ struct pipe *family; /* pointer back to the child's parent pipe */
+ int sp; /* number of SPECIAL_VAR_SYMBOL */
int type;
};
struct pipe {
- int jobid; /* job number */
- int num_progs; /* total number of programs in job */
- int running_progs; /* number of programs running */
- char *text; /* name of job */
- char *cmdbuf; /* buffer various argv's point into */
- pid_t pgrp; /* process group ID for the job */
- struct child_prog *progs; /* array of commands in pipe */
- struct pipe *next; /* to track background commands */
- int stopped_progs; /* number of programs alive, but stopped */
- int job_context; /* bitmask defining current context */
- pipe_style followup; /* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */
- reserved_style r_mode; /* supports if, for, while, until */
+ int jobid; /* job number */
+ int num_progs; /* total number of programs in job */
+ int running_progs; /* number of programs running */
+ char *text; /* name of job */
+ char *cmdbuf; /* buffer various argv's point into */
+ pid_t pgrp; /* process group ID for the job */
+ struct child_prog *progs; /* array of commands in pipe */
+ struct pipe *next; /* to track background commands */
+ int stopped_progs; /* number of programs alive, but stopped */
+ int job_context; /* bitmask defining current context */
+ pipe_style followup; /* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */
+ reserved_style r_mode; /* supports if, for, while, until */
};
struct close_me {
static struct close_me *close_me_head;
static const char *cwd;
static struct pipe *job_list;
-static unsigned int last_bg_pid;
+static unsigned last_bg_pid;
static int last_jobid;
-static unsigned int shell_terminal;
+static unsigned shell_terminal;
static char *PS1;
static char *PS2;
static struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
/* broken, of course, but OK for testing */
static char *indenter(int i)
{
- static char blanks[]=" ";
+ static char blanks[] = " ";
return &blanks[sizeof(blanks)-i-1];
}
#else
-#define debug_printf(...) do {;} while(0);
+#define debug_printf(...) do {;} while (0);
#endif
#define final_printf debug_printf
static int b_addchr(o_string *o, int ch);
static void b_reset(o_string *o);
static int b_addqchr(o_string *o, int ch, int quote);
-static int b_adduint(o_string *o, unsigned int i);
+static int b_adduint(o_string *o, unsigned i);
/* in_str manipulations: */
static int static_get(struct in_str *i);
static int static_peek(struct in_str *i);
* 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[] = {
- {"bg", "Resume a job in the background", builtin_fg_bg},
- {"break", "Exit for, while or until loop", builtin_not_written},
- {"cd", "Change working directory", builtin_cd},
- {"continue", "Continue for, while or until loop", builtin_not_written},
- {"env", "Print all environment variables", builtin_env},
- {"eval", "Construct and run shell command", builtin_eval},
- {"exec", "Exec command, replacing this shell with the exec'd process",
- builtin_exec},
- {"exit", "Exit from shell()", builtin_exit},
- {"export", "Set environment variable", builtin_export},
- {"fg", "Bring job into the foreground", builtin_fg_bg},
- {"jobs", "Lists the active jobs", builtin_jobs},
- {"pwd", "Print current directory", builtin_pwd},
- {"read", "Input environment variable", builtin_read},
- {"return", "Return from a function", builtin_not_written},
- {"set", "Set/unset shell local variables", builtin_set},
- {"shift", "Shift positional parameters", builtin_shift},
- {"trap", "Trap signals", builtin_not_written},
- {"ulimit","Controls resource limits", builtin_not_written},
- {"umask","Sets file creation mask", builtin_umask},
- {"unset", "Unset environment variable", builtin_unset},
- {".", "Source-in and run commands in a file", builtin_source},
- {"help", "List shell built-in commands", builtin_help},
- {NULL, NULL, NULL}
+ { "bg", "Resume a job in the background", builtin_fg_bg },
+ { "break", "Exit for, while or until loop", builtin_not_written },
+ { "cd", "Change working directory", builtin_cd },
+ { "continue", "Continue for, while or until loop", builtin_not_written },
+ { "env", "Print all environment variables", builtin_env },
+ { "eval", "Construct and run shell command", builtin_eval },
+ { "exec", "Exec command, replacing this shell with the exec'd process",
+ builtin_exec },
+ { "exit", "Exit from shell()", builtin_exit },
+ { "export", "Set environment variable", builtin_export },
+ { "fg", "Bring job into the foreground", builtin_fg_bg },
+ { "jobs", "Lists the active jobs", builtin_jobs },
+ { "pwd", "Print current directory", builtin_pwd },
+ { "read", "Input environment variable", builtin_read },
+ { "return", "Return from a function", builtin_not_written },
+ { "set", "Set/unset shell local variables", builtin_set },
+ { "shift", "Shift positional parameters", builtin_shift },
+ { "trap", "Trap signals", builtin_not_written },
+ { "ulimit","Controls resource limits", builtin_not_written },
+ { "umask","Sets file creation mask", builtin_umask },
+ { "unset", "Unset environment variable", builtin_unset },
+ { ".", "Source-in and run commands in a file", builtin_source },
+ { "help", "List shell built-in commands", builtin_help },
+ { NULL, NULL, NULL }
};
static const char *set_cwd(void)
{
- if(cwd==bb_msg_unknown)
+ if (cwd == bb_msg_unknown)
cwd = NULL; /* xgetcwd(arg) called free(arg) */
cwd = xgetcwd((char *)cwd);
if (!cwd)
{
char **e = environ;
if (e == NULL) return EXIT_FAILURE;
- for (; *e; e++) {
- puts(*e);
+ for (*e) {
+ puts(*e++);
}
return EXIT_SUCCESS;
}
name = strdup(name);
- if(name) {
+ if (name) {
const char *value = strchr(name, '=');
if (!value) {
size_t ln = strlen(name);
tmp = realloc(name, ln+strlen(value)+2);
- if(tmp==NULL)
+ if (tmp == NULL)
res = -1;
else {
sprintf(tmp+ln, "=%s", value);
}
}
}
- if (res<0)
+ if (res < 0)
bb_perror_msg("export");
- else if(res==0)
+ else if (res == 0)
res = set_local_var(name, 1);
else
res = 0;
static int builtin_fg_bg(struct child_prog *child)
{
int i, jobnum;
- struct pipe *pi=NULL;
+ struct pipe *pi = NULL;
if (!interactive)
return EXIT_FAILURE;
printf("\nBuilt-in commands:\n");
printf("-------------------\n");
for (x = bltins; x->cmd; x++) {
- if (x->descr==NULL)
+ if (x->descr == NULL)
continue;
printf("%s\t%s\n", x->cmd, x->descr);
}
static int builtin_jobs(struct child_prog *child ATTRIBUTE_UNUSED)
{
struct pipe *job;
- char *status_string;
+ const char *status_string;
for (job = job_list; job; job = job->next) {
if (job->running_progs == job->stopped_progs)
if (child->argv[1]) {
char string[BUFSIZ];
- char *var = 0;
+ char *var = NULL;
- string[0] = 0; /* In case stdin has only EOF */
+ string[0] = '\0'; /* In case stdin has only EOF */
/* read string */
fgets(string, sizeof(string), stdin);
chomp(string);
- var = malloc(strlen(child->argv[1])+strlen(string)+2);
- if(var) {
+ var = malloc(strlen(child->argv[1]) + strlen(string) + 2);
+ if (var) {
sprintf(var, "%s=%s", child->argv[1], string);
res = set_local_var(var, 0);
} else
bb_perror_msg("read");
free(var); /* So not move up to avoid breaking errno */
return res;
- } else {
- do res=getchar(); while(res!='\n' && res!=EOF);
- return 0;
}
+ do res = getchar(); while (res != '\n' && res != EOF);
+ return 0;
}
/* built-in 'set VAR=value' handler */
struct variables *e;
if (temp == NULL)
- for(e = top_vars; e; e=e->next)
+ for (e = top_vars; e; e = e->next)
printf("%s=%s\n", e->name, e->value);
else
set_local_var(temp, 0);
- return EXIT_SUCCESS;
+ return EXIT_SUCCESS;
}
/* Built-in 'shift' handler */
static int builtin_shift(struct child_prog *child)
{
- int n=1;
+ int n = 1;
if (child->argv[1]) {
- n=atoi(child->argv[1]);
+ n = atoi(child->argv[1]);
}
- if (n>=0 && n<global_argc) {
+ if (n >= 0 && n < global_argc) {
/* XXX This probably breaks $0 */
global_argc -= n;
global_argv += n;
const char *arg = child->argv[1];
char *end;
if (arg) {
- new_umask=strtoul(arg, &end, 8);
- if (*end!='\0' || end == arg) {
+ new_umask = strtoul(arg, &end, 8);
+ if (*end != '\0' || end == arg) {
return EXIT_FAILURE;
}
} else {
- printf("%.3o\n", (unsigned int) (new_umask=umask(0)));
+ new_umask = umask(0);
+ printf("%.3o\n", (unsigned) new_umask);
}
umask(new_umask);
return EXIT_SUCCESS;
static int builtin_not_written(struct child_prog *child)
{
- printf("builtin_%s not written\n",child->argv[0]);
+ printf("builtin_%s not written\n", child->argv[0]);
return EXIT_FAILURE;
}
static int b_addchr(o_string *o, int ch)
{
debug_printf("b_addchr: %c %d %p\n", ch, o->length, o);
- if (b_check_space(o, 1)) return B_NOSPAC;
+ if (b_check_space(o, 1))
+ return B_NOSPAC;
o->data[o->length] = ch;
o->length++;
o->data[o->length] = '\0';
{
o->length = 0;
o->nonnull = 0;
- if (o->data != NULL) *o->data = '\0';
+ if (o->data != NULL)
+ *o->data = '\0';
}
static void b_free(o_string *o)
if (quote && strchr("*?[\\",ch)) {
int rc;
rc = b_addchr(o, '\\');
- if (rc) return rc;
+ if (rc)
+ return rc;
}
return b_addchr(o, ch);
}
/* belongs in utility.c */
-static char *simple_itoa(unsigned int i)
+static char *simple_itoa(unsigned i)
{
- /* 21 digits plus null terminator, good for 64-bit or smaller ints */
- static char local[22];
- char *p = &local[21];
+ static char local[sizeof(int)*3 + 2];
+ char *p = &local[sizeof(int)*3 + 2 - 1];
*p-- = '\0';
do {
*p-- = '0' + i % 10;
return p + 1;
}
-static int b_adduint(o_string *o, unsigned int i)
+static int b_adduint(o_string *o, unsigned i)
{
int r;
char *p = simple_itoa(i);
/* no escape checking necessary */
- do r=b_addchr(o, *p++); while (r==0 && *p);
+ do r = b_addchr(o, *p++); while (r==0 && *p);
return r;
}
static int static_get(struct in_str *i)
{
- int ch=*i->p++;
- if (ch=='\0') return EOF;
+ int ch = *i->p++;
+ if (ch == '\0') return EOF;
return ch;
}
PS1 = NULL;
#else
PS1 = getenv("PS1");
- if(PS1==0)
+ if (PS1 == NULL)
PS1 = "\\w \\$ ";
#endif
}
/* Set up the prompt */
if (promptmode == 1) {
free(PS1);
- PS1=xmalloc(strlen(cwd)+4);
- sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# ");
+ PS1 = xmalloc(strlen(cwd)+4);
+ sprintf(PS1, "%s %s", cwd, (geteuid() != 0) ? "$ " : "# ");
*prompt_str = PS1;
} else {
*prompt_str = PS2;
}
#else
- *prompt_str = (promptmode==1)? PS1 : PS2;
+ *prompt_str = (promptmode == 1) ? PS1 : PS2;
#endif
- debug_printf("result %s\n",*prompt_str);
+ debug_printf("result %s\n", *prompt_str);
}
#if ENABLE_FEATURE_EDITING
#else
fputs(prompt_str, stdout);
fflush(stdout);
- the_command[0]=fgetc(i->file);
- the_command[1]='\0';
+ the_command[0] = fgetc(i->file);
+ the_command[1] = '\0';
#endif
fflush(stdout);
i->p = the_command;
ch = 0;
/* If there is data waiting, eat it up */
if (i->p && *i->p) {
- ch=*i->p++;
+ ch = *i->p++;
} else {
/* need to double check i->file because we might be doing something
* more complicated by now, like sourcing or substituting. */
if (i->__promptme && interactive && i->file == stdin) {
- while(! i->p || (interactive && strlen(i->p)==0) ) {
+ while (!i->p || !(interactive && strlen(i->p))) {
get_user_input(i);
}
- i->promptmode=2;
+ i->promptmode = 2;
i->__promptme = 0;
if (i->p && *i->p) {
- ch=*i->p++;
+ ch = *i->p++;
}
} else {
ch = fgetc(i->file);
debug_printf("b_getch: got a %d\n", ch);
}
- if (ch == '\n') i->__promptme=1;
+ if (ch == '\n')
+ i->__promptme = 1;
return ch;
}
{
i->peek = file_peek;
i->get = file_get;
- i->__promptme=1;
- i->promptmode=1;
+ i->__promptme = 1;
+ i->promptmode = 1;
i->file = f;
i->p = NULL;
}
static void close_all(void)
{
struct close_me *c;
- for (c=close_me_head; c; c=c->next) {
+ for (c = close_me_head; c; c = c->next) {
close(c->fd);
}
close_me_head = NULL;
int openfd, mode;
struct redir_struct *redir;
- for (redir=prog->redirects; redir; redir=redir->next) {
+ for (redir = prog->redirects; redir; redir = redir->next) {
if (redir->dup == -1 && redir->word.gl_pathv == NULL) {
/* something went wrong in the parse. Pretend it didn't happen */
continue;
}
if (redir->dup == -1) {
- mode=redir_table[redir->type].mode;
+ mode = redir_table[redir->type].mode;
openfd = open(redir->word.gl_pathv[0], mode, 0666);
if (openfd < 0) {
/* this could get lost if stderr has been redirected, but
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
char *p;
const struct built_in_command *x;
if (child->argv) {
- for (i=0; is_assignment(child->argv[i]); i++) {
- debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
+ for (i = 0; is_assignment(child->argv[i]); i++) {
+ debug_printf("pid %d environment modification: %s\n",
+ getpid(), child->argv[i]);
p = insert_var_value(child->argv[i]);
putenv(strdup(p));
- if (p != child->argv[i]) free(p);
+ if (p != child->argv[i])
+ free(p);
}
- child->argv+=i; /* XXX this hack isn't so horrible, since we are about
+ child->argv += i; /* XXX this hack isn't so horrible, since we are about
to exit, and therefore don't need to keep data
structures consistent for free() use. */
/* If a variable is assigned in a forest, and nobody listens,
char *name = child->argv[0];
/* Count argc for use in a second... */
- for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
+ for (argc_l = 0; *argv_l; argv_l++, argc_l++)
+ /**/;
optind = 1;
debug_printf("running applet %s\n", name);
run_applet_by_name(name, argc_l, child->argv);
}
#endif
- debug_printf("exec of %s\n",child->argv[0]);
- execvp(child->argv[0],child->argv);
- bb_perror_msg("cannot exec: %s",child->argv[0]);
+ debug_printf("exec of %s\n", child->argv[0]);
+ execvp(child->argv[0], child->argv);
+ bb_perror_msg("cannot exec: %s", child->argv[0]);
_exit(1);
} else if (child->group) {
debug_printf("runtime nesting to group\n");
- interactive=0; /* crucial!!!! */
+ interactive = 0; /* crucial!!!! */
rcode = run_list_real(child->group);
/* OK to leak memory by not calling free_pipe_list,
* since this process is about to exit */
if (!job_list) {
thejob = job_list = xmalloc(sizeof(*thejob));
} else {
- for (thejob = job_list; thejob->next; thejob = thejob->next) /* nothing */;
+ for (thejob = job_list; thejob->next; thejob = thejob->next)
+ /* nothing */;
thejob->next = xmalloc(sizeof(*thejob));
thejob = thejob->next;
}
//if (pi->progs[0] && pi->progs[0].argv && pi->progs[0].argv[0])
{
- char *bar=thejob->text;
- char **foo=pi->progs[0].argv;
- while(foo && *foo) {
- bar += sprintf(bar, "%s ", *foo++);
- }
+ char *bar = thejob->text;
+ char **foo = pi->progs[0].argv;
+ if (foo)
+ while (*foo)
+ bar += sprintf(bar, "%s ", *foo++);
}
/* we don't wait for background thejobs to return -- append it
pid_t childpid;
attributes = WUNTRACED;
- if (fg_pipe==NULL) {
+ if (fg_pipe == NULL) {
attributes |= WNOHANG;
}
while ((childpid = waitpid(-1, &status, attributes)) > 0) {
if (fg_pipe) {
int i, rcode = 0;
- for (i=0; i < fg_pipe->num_progs; i++) {
+ for (i = 0; i < fg_pipe->num_progs; i++) {
if (fg_pipe->progs[i].pid == childpid) {
- if (i==fg_pipe->num_progs-1)
- rcode=WEXITSTATUS(status);
- (fg_pipe->num_progs)--;
+ if (i == fg_pipe->num_progs-1)
+ rcode = WEXITSTATUS(status);
+ fg_pipe->num_progs--;
return rcode;
}
}
break;
}
- if(pi==NULL) {
- debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
+ if (pi == NULL) {
+ debug_printf("checkjobs: pid %d was not in our list!\n",
+ childpid);
continue;
}
pi->progs[prognum].pid = 0;
if (!pi->running_progs) {
- printf(JOB_STATUS_FORMAT, pi->jobid, "Done", pi->text);
+ printf(JOB_STATUS_FORMAT, pi->jobid,
+ "Done", pi->text);
remove_bg_job(pi);
}
} else {
* Builtins within pipes have to fork anyway, and are handled in
* pseudo_exec. "echo foo | read bar" doesn't work on bash, either.
*/
- child = & (pi->progs[0]);
+ child = &(pi->progs[0]);
if (pi->num_progs == 1 && child->group && child->subshell == 0) {
- int squirrel[] = {-1, -1, -1};
+ int squirrel[] = { -1, -1, -1 };
int rcode;
debug_printf("non-subshell grouping\n");
setup_redirects(child, squirrel);
restore_redirects(squirrel);
return rcode;
} else if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
- for (i=0; is_assignment(child->argv[i]); i++) { /* nothing */ }
- if (i!=0 && child->argv[i]==NULL) {
+ for (i = 0; is_assignment(child->argv[i]); i++)
+ /* nothing */;
+ if (i != 0 && child->argv[i] == NULL) {
/* assignments, but no command: set the local environment */
- for (i=0; child->argv[i]!=NULL; i++) {
-
+ for (i = 0; child->argv[i] != NULL; i++) {
/* Ok, this case is tricky. We have to decide if this is a
* local variable, or an already exported variable. If it is
* already exported, we have to export the new value. If it is
* not exported, we need only set this as a local variable.
* This junk is all to decide whether or not to export this
* variable. */
- int export_me=0;
+ int export_me = 0;
char *name, *value;
name = xstrdup(child->argv[i]);
debug_printf("Local environment set: %s\n", name);
value = strchr(name, '=');
if (value)
- *value=0;
- if ( get_local_var(name)) {
- export_me=1;
+ *value = 0;
+ if (get_local_var(name)) {
+ export_me = 1;
}
free(name);
p = insert_var_value(child->argv[i]);
set_local_var(p, export_me);
- if (p != child->argv[i]) free(p);
+ if (p != child->argv[i])
+ free(p);
}
return EXIT_SUCCESS; /* don't worry about errors in set_local_var() yet */
}
}
}
if (child->sp) {
- char * str = NULL;
+ char *str = NULL;
str = make_string((child->argv + i));
parse_string_outer(str, FLAG_EXIT_FROM_LOOP | FLAG_REPARSING);
}
for (x = bltins; x->cmd; x++) {
if (strcmp(child->argv[i], x->cmd) == 0 ) {
- int squirrel[] = {-1, -1, -1};
+ int squirrel[] = { -1, -1, -1 };
int rcode;
- if (x->function == builtin_exec && child->argv[i+1]==NULL) {
+ if (x->function == builtin_exec && child->argv[i+1] == NULL) {
debug_printf("magic exec\n");
setup_redirects(child,NULL);
return EXIT_SUCCESS;
* Is it really safe for inline use? Experimentally,
* things seem to work with glibc. */
setup_redirects(child, squirrel);
- child->argv+=i; /* XXX horrible hack */
+ child->argv += i; /* XXX horrible hack */
rcode = x->function(child);
- child->argv-=i; /* XXX restore hack so free() can work right */
+ child->argv -= i; /* XXX restore hack so free() can work right */
restore_redirects(squirrel);
return rcode;
}
}
for (i = 0; i < pi->num_progs; i++) {
- child = & (pi->progs[i]);
+ child = &(pi->progs[i]);
/* pipes are inserted between pairs of commands */
if ((i + 1) < pi->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 {
- nextout=1;
+ nextout = 1;
pipefds[0] = -1;
}
/* XXX test for failed fork()? */
#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
- if (!(child->pid = fork()))
+ child->pid = fork();
#else
- if (!(child->pid = vfork()))
+ child->pid = vfork();
#endif
- {
+ if (!child->pid) {
/* Set the handling for job control signals back to the default. */
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
pseudo_exec(child);
}
-
/* put our child in the process group whose leader is the
first process in this pipe */
if (pi->pgrp < 0) {
struct pipe *rpipe;
int flag_rep = 0;
int save_num_progs;
- int rcode=0, flag_skip=1;
+ int rcode = 0, flag_skip = 1;
int flag_restore = 0;
- int if_code=0, next_if_code=0; /* need double-buffer to handle elif */
- reserved_style rmode, skip_more_in_this_rmode=RES_XXXX;
+ int if_code = 0, next_if_code = 0; /* need double-buffer to handle elif */
+ reserved_style rmode, skip_more_in_this_rmode = RES_XXXX;
/* check syntax for "for" */
for (rpipe = pi; rpipe; rpipe = rpipe->next) {
- if ((rpipe->r_mode == RES_IN ||
- rpipe->r_mode == RES_FOR) &&
- (rpipe->next == NULL)) {
- syntax();
- return 1;
+ if ((rpipe->r_mode == RES_IN || rpipe->r_mode == RES_FOR)
+ && (rpipe->next == NULL)
+ ) {
+ syntax();
+ return 1;
}
- if ((rpipe->r_mode == RES_IN &&
- (rpipe->next->r_mode == RES_IN &&
- rpipe->next->progs->argv != NULL))||
- (rpipe->r_mode == RES_FOR &&
- rpipe->next->r_mode != RES_IN)) {
- syntax();
- return 1;
+ if ((rpipe->r_mode == RES_IN && rpipe->next->r_mode == RES_IN && rpipe->next->progs->argv != NULL)
+ || (rpipe->r_mode == RES_FOR && rpipe->next->r_mode != RES_IN)
+ ) {
+ syntax();
+ return 1;
}
}
for (; pi; pi = (flag_restore != 0) ? rpipe : pi->next) {
- if (pi->r_mode == RES_WHILE || pi->r_mode == RES_UNTIL ||
- pi->r_mode == RES_FOR) {
- flag_restore = 0;
- if (!rpipe) {
- flag_rep = 0;
- rpipe = pi;
- }
+ if (pi->r_mode == RES_WHILE || pi->r_mode == RES_UNTIL
+ || pi->r_mode == RES_FOR
+ ) {
+ flag_restore = 0;
+ if (!rpipe) {
+ flag_rep = 0;
+ rpipe = pi;
+ }
}
rmode = pi->r_mode;
- debug_printf("rmode=%d if_code=%d next_if_code=%d skip_more=%d\n", rmode, if_code, next_if_code, skip_more_in_this_rmode);
+ debug_printf("rmode=%d if_code=%d next_if_code=%d skip_more=%d\n",
+ rmode, if_code, next_if_code, skip_more_in_this_rmode);
if (rmode == skip_more_in_this_rmode && flag_skip) {
- if (pi->followup == PIPE_SEQ) flag_skip=0;
+ if (pi->followup == PIPE_SEQ)
+ flag_skip = 0;
continue;
}
flag_skip = 1;
skip_more_in_this_rmode = RES_XXXX;
- if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code;
- if (rmode == RES_THEN && if_code) continue;
- if (rmode == RES_ELSE && !if_code) continue;
- if (rmode == RES_ELIF && !if_code) break;
+ if (rmode == RES_THEN || rmode == RES_ELSE)
+ if_code = next_if_code;
+ if (rmode == RES_THEN && if_code)
+ continue;
+ if (rmode == RES_ELSE && !if_code)
+ continue;
+ if (rmode == RES_ELIF && !if_code)
+ break;
if (rmode == RES_FOR && pi->num_progs) {
if (!list) {
/* if no variable values after "in" we skip "for" */
- if (!pi->next->progs->argv) continue;
+ if (!pi->next->progs->argv)
+ continue;
/* create list of variable values */
list = make_list_in(pi->next->progs->argv,
- pi->progs->argv[0]);
+ pi->progs->argv[0]);
save_list = list;
save_name = pi->progs->argv[0];
pi->progs->argv[0] = NULL;
flag_rep = 1;
}
- if (!(*list)) {
+ if (!*list) {
free(pi->progs->argv[0]);
free(save_list);
list = NULL;
flag_rep = 0;
pi->progs->argv[0] = save_name;
- pi->progs->glob_result.gl_pathv[0] =
- pi->progs->argv[0];
+ pi->progs->glob_result.gl_pathv[0] = pi->progs->argv[0];
continue;
} else {
/* insert new value from list for variable */
if (pi->progs->argv[0])
free(pi->progs->argv[0]);
pi->progs->argv[0] = *list++;
- pi->progs->glob_result.gl_pathv[0] =
- pi->progs->argv[0];
+ pi->progs->glob_result.gl_pathv[0] = pi->progs->argv[0];
}
}
- if (rmode == RES_IN) continue;
+ if (rmode == RES_IN)
+ continue;
if (rmode == RES_DO) {
- if (!flag_rep) continue;
+ if (!flag_rep)
+ continue;
}
if ((rmode == RES_DONE)) {
if (flag_rep) {
rpipe = NULL;
}
}
- if (pi->num_progs == 0) continue;
+ if (pi->num_progs == 0)
+ continue;
save_num_progs = pi->num_progs; /* save number of programs */
rcode = run_pipe_real(pi);
debug_printf("run_pipe_real returned %d\n",rcode);
- if (rcode!=-1) {
+ if (rcode != -1) {
/* We only ran a builtin: rcode was set by the return value
* of run_pipe_real(), and we don't need to wait for anything. */
- } else if (pi->followup==PIPE_BG) {
+ } else if (pi->followup == PIPE_BG) {
/* XXX check bash's behavior with nontrivial pipes */
/* XXX compute jobid */
/* XXX what does bash do with attempts to background builtins? */
}
debug_printf("checkjobs returned %d\n",rcode);
}
- last_return_code=rcode;
+ last_return_code = rcode;
pi->num_progs = save_num_progs; /* restore number of programs */
if ( rmode == RES_IF || rmode == RES_ELIF )
- next_if_code=rcode; /* can be overwritten a number of times */
+ next_if_code = rcode; /* can be overwritten a number of times */
if (rmode == RES_WHILE)
flag_rep = !last_return_code;
if (rmode == RES_UNTIL)
flag_rep = last_return_code;
- if ( (rcode==EXIT_SUCCESS && pi->followup==PIPE_OR) ||
- (rcode!=EXIT_SUCCESS && pi->followup==PIPE_AND) )
- skip_more_in_this_rmode=rmode;
+ if ((rcode == EXIT_SUCCESS && pi->followup == PIPE_OR)
+ || (rcode != EXIT_SUCCESS && pi->followup == PIPE_AND)
+ ) {
+ skip_more_in_this_rmode = rmode;
+ }
checkjobs(NULL);
}
return rcode;
char **p;
struct child_prog *child;
struct redir_struct *r, *rnext;
- int a, i, ret_code=0;
+ int a, i, ret_code = 0;
if (pi->stopped_progs > 0)
return ret_code;
- final_printf("%s run pipe: (pid %d)\n",indenter(indent),getpid());
- for (i=0; i<pi->num_progs; i++) {
+ 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",indenter(indent),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",indenter(indent),a,*p);
+ for (a = 0, p = child->argv; *p; a++, p++) {
+ final_printf("%s argv[%d] = %s\n", indenter(indent), a, *p);
}
globfree(&child->glob_result);
- child->argv=NULL;
+ child->argv = NULL;
} else if (child->group) {
- 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",indenter(indent));
+ 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", indenter(indent));
} else {
- final_printf("%s (nil)\n",indenter(indent));
+ final_printf("%s (nil)\n", indenter(indent));
}
- for (r=child->redirects; r; r=rnext) {
+ for (r = child->redirects; r; r = rnext) {
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 */
} else {
final_printf("&%d\n", r->dup);
}
- rnext=r->next;
+ rnext = r->next;
free(r);
}
- child->redirects=NULL;
+ child->redirects = NULL;
}
free(pi->progs); /* children are an array, they get freed all at once */
- pi->progs=NULL;
+ pi->progs = NULL;
return ret_code;
}
static int free_pipe_list(struct pipe *head, int indent)
{
- int rcode=0; /* if list has no members */
+ int rcode = 0; /* if list has no members */
struct pipe *pi, *next;
- for (pi=head; pi; pi=next) {
+ for (pi = head; pi; pi = next) {
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", indenter(indent), pi->followup);
- next=pi->next;
- pi->next=NULL;
+ next = pi->next;
+ pi->next = NULL;
free(pi);
}
return rcode;
/* Select which version we will use */
static int run_list(struct pipe *pi)
{
- int rcode=0;
- if (fake_mode==0) {
+ int rcode = 0;
+ if (fake_mode == 0) {
rcode = run_list_real(pi);
}
/* free_pipe_list has the side effect of clearing memory
*/
static int globhack(const char *src, int flags, glob_t *pglob)
{
- int cnt=0, pathc;
+ int cnt = 0, pathc;
const char *s;
char *dest;
- for (cnt=1, s=src; s && *s; s++) {
+ for (cnt = 1, s = src; s && *s; s++) {
if (*s == '\\') s++;
cnt++;
}
dest = malloc(cnt);
if (!dest) return GLOB_NOSPACE;
if (!(flags & GLOB_APPEND)) {
- pglob->gl_pathv=NULL;
- pglob->gl_pathc=0;
- pglob->gl_offs=0;
- pglob->gl_offs=0;
+ pglob->gl_pathv = NULL;
+ pglob->gl_pathc = 0;
+ pglob->gl_offs = 0;
+ pglob->gl_offs = 0;
}
pathc = ++pglob->gl_pathc;
pglob->gl_pathv = realloc(pglob->gl_pathv, (pathc+1)*sizeof(*pglob->gl_pathv));
if (pglob->gl_pathv == NULL) return GLOB_NOSPACE;
- pglob->gl_pathv[pathc-1]=dest;
- pglob->gl_pathv[pathc]=NULL;
- for (s=src; s && *s; s++, dest++) {
+ pglob->gl_pathv[pathc-1] = dest;
+ pglob->gl_pathv[pathc] = NULL;
+ for (s = src; s && *s; s++, dest++) {
if (*s == '\\') s++;
*dest = *s;
}
- *dest='\0';
+ *dest = '\0';
return 0;
}
{
for (; *s; s++) {
if (*s == '\\') s++;
- if (strchr("*[?",*s)) return 1;
+ if (strchr("*[?", *s)) return 1;
}
return 0;
}
if (dest->nonnull) {
/* bash man page calls this an "explicit" null */
gr = globhack(dest->data, flags, pglob);
- debug_printf("globhack returned %d\n",gr);
+ debug_printf("globhack returned %d\n", gr);
} else {
return 0;
}
} else if (glob_needed(dest->data)) {
gr = glob(dest->data, flags, NULL, pglob);
- debug_printf("glob returned %d\n",gr);
+ debug_printf("glob returned %d\n", gr);
if (gr == GLOB_NOMATCH) {
/* quote removal, or more accurately, backslash removal */
gr = globhack(dest->data, flags, pglob);
- debug_printf("globhack returned %d\n",gr);
+ debug_printf("globhack returned %d\n", gr);
}
} else {
gr = globhack(dest->data, flags, pglob);
- debug_printf("globhack returned %d\n",gr);
+ debug_printf("globhack returned %d\n", gr);
}
if (gr == GLOB_NOSPACE)
bb_error_msg_and_die("out of memory during glob");
if (gr != 0) { /* GLOB_ABORTED ? */
- bb_error_msg("glob(3) error %d",gr);
+ bb_error_msg("glob(3) error %d", gr);
}
/* globprint(glob_target); */
return gr;
if (!s)
return NULL;
- for (cur = top_vars; cur; cur=cur->next)
- if(strcmp(cur->name, s)==0)
+ for (cur = top_vars; cur; cur = cur->next)
+ if (strcmp(cur->name, s) == 0)
return cur->value;
return NULL;
}
static int set_local_var(const char *s, int flg_export)
{
char *name, *value;
- int result=0;
+ int result = 0;
struct variables *cur;
- name=strdup(s);
+ name = strdup(s);
/* Assume when we enter this function that we are already in
* NAME=VALUE format. So the first order of business is to
* split 's' on the '=' into 'name' and 'value' */
value = strchr(name, '=');
- if (value==0 && ++value==0) {
+ if (value == 0 && ++value == 0) {
free(name);
return -1;
}
*value++ = 0;
- for(cur = top_vars; cur; cur = cur->next) {
- if(strcmp(cur->name, name)==0)
+ for (cur = top_vars; cur; cur = cur->next) {
+ if (strcmp(cur->name, name) == 0)
break;
}
- if(cur) {
- if(strcmp(cur->value, value)==0) {
- if(flg_export>0 && cur->flg_export==0)
+ if (cur) {
+ if (strcmp(cur->value, value) == 0) {
+ if (flg_export>0 && cur->flg_export == 0)
cur->flg_export = flg_export;
else
result++;
} else {
- if(cur->flg_read_only) {
+ if (cur->flg_read_only) {
bb_error_msg("%s: readonly variable", name);
result = -1;
} else {
- if(flg_export>0 || cur->flg_export>1)
- cur->flg_export=1;
+ if (flg_export > 0 || cur->flg_export>1)
+ cur->flg_export = 1;
free((char*)cur->value);
cur->value = strdup(value);
}
} else {
cur = malloc(sizeof(struct variables));
- if(!cur) {
+ if (!cur) {
result = -1;
} else {
cur->name = strdup(name);
- if(cur->name == 0) {
+ if (cur->name) {
free(cur);
result = -1;
} else {
cur->next = 0;
cur->flg_export = flg_export;
cur->flg_read_only = 0;
- while(bottom->next) bottom=bottom->next;
+ while (bottom->next)
+ bottom = bottom->next;
bottom->next = cur;
}
}
}
- if(result==0 && cur->flg_export==1) {
+ if (result == 0 && cur->flg_export == 1) {
*(value-1) = '=';
result = putenv(name);
} else {
free(name);
- if(result>0) /* equivalent to previous set */
+ if (result > 0) /* equivalent to previous set */
result = 0;
}
return result;
struct variables *cur;
if (name) {
- for (cur = top_vars; cur; cur=cur->next) {
- if(strcmp(cur->name, name)==0)
+ for (cur = top_vars; cur; cur = cur->next) {
+ if (strcmp(cur->name, name) == 0)
break;
}
- if(cur!=0) {
+ if (cur != 0) {
struct variables *next = top_vars;
- if(cur->flg_read_only) {
+ if (cur->flg_read_only) {
bb_error_msg("%s: readonly variable", name);
return;
- } else {
- if(cur->flg_export)
- unsetenv(cur->name);
- free((char*)cur->name);
- free((char*)cur->value);
- while (next->next != cur)
- next = next->next;
- next->next = cur->next;
}
+ if (cur->flg_export)
+ unsetenv(cur->name);
+ free((char*)cur->name);
+ free((char*)cur->value);
+ while (next->next != cur)
+ next = next->next;
+ next->next = cur->next;
free(cur);
}
}
static int is_assignment(const char *s)
{
- if (s==NULL || !isalpha(*s)) return 0;
- ++s;
- while(isalnum(*s) || *s=='_') ++s;
- return *s=='=';
+ if (!s || !isalpha(*s))
+ return 0;
+ s++;
+ while (isalnum(*s) || *s == '_')
+ s++;
+ return *s == '=';
}
/* the src parameter allows us to peek forward to a possible &n syntax
static int setup_redirect(struct p_context *ctx, int fd, redir_type style,
struct in_str *input)
{
- struct child_prog *child=ctx->child;
+ struct child_prog *child = ctx->child;
struct redir_struct *redir = child->redirects;
- struct redir_struct *last_redir=NULL;
+ struct redir_struct *last_redir = NULL;
/* Create a new redir_struct and drop it onto the end of the linked list */
- while(redir) {
- last_redir=redir;
- redir=redir->next;
+ while (redir) {
+ last_redir = redir;
+ redir = redir->next;
}
redir = xmalloc(sizeof(struct redir_struct));
- redir->next=NULL;
- redir->word.gl_pathv=NULL;
+ redir->next = NULL;
+ redir->word.gl_pathv = NULL;
if (last_redir) {
- last_redir->next=redir;
+ last_redir->next = redir;
} else {
- child->redirects=redir;
+ child->redirects = redir;
}
- redir->type=style;
- redir->fd= (fd==-1) ? redir_table[style].default_fd : fd ;
+ redir->type = style;
+ redir->fd = (fd == -1) ? redir_table[style].default_fd : fd;
debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip);
static void initialize_context(struct p_context *ctx)
{
- ctx->pipe=NULL;
- ctx->pending_redirect=NULL;
- ctx->child=NULL;
- ctx->list_head=new_pipe();
- ctx->pipe=ctx->list_head;
- ctx->w=RES_NONE;
- ctx->stack=NULL;
- ctx->old_flag=0;
+ ctx->pipe = NULL;
+ ctx->pending_redirect = NULL;
+ ctx->child = NULL;
+ ctx->list_head = new_pipe();
+ ctx->pipe = ctx->list_head;
+ ctx->w = RES_NONE;
+ ctx->stack = NULL;
+ ctx->old_flag = 0;
done_command(ctx); /* creates the memory for working child */
}
{ "done", RES_DONE, FLAG_END }
};
struct reserved_combo *r;
- for (r=reserved_list;
#define NRES sizeof(reserved_list)/sizeof(struct reserved_combo)
- r<reserved_list+NRES; r++) {
+ for (r = reserved_list; r < reserved_list+NRES; r++) {
if (strcmp(dest->data, r->literal) == 0) {
debug_printf("found reserved word %s, code %d\n",r->literal,r->code);
if (r->flag & FLAG_START) {
int num;
if (o->length==0) return -1;
- for(num=0; num<o->length; num++) {
+ for (num=0; num<o->length; num++) {
if (!isdigit(*(o->data+num))) {
return -1;
}
if (isalpha(ch)) {
b_addchr(dest, SPECIAL_VAR_SYMBOL);
ctx->child->sp++;
- while(ch=b_peek(input),isalnum(ch) || ch=='_') {
+ while (ch=b_peek(input),isalnum(ch) || ch=='_') {
b_getch(input);
b_addchr(dest,ch);
}
ctx->child->sp++;
b_getch(input);
/* XXX maybe someone will try to escape the '}' */
- while(ch=b_getch(input),ch!=EOF && ch!='}') {
+ while (ch=b_getch(input),ch!=EOF && ch!='}') {
b_addchr(dest,ch);
}
if (ch != '}') {
if (m!=2) switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
- while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
+ while (1) {
+ ch = b_peek(input);
+ if (ch == EOF || ch == '\n')
+ break;
+ b_getch(input);
+ }
} else {
b_addqchr(dest, ch, dest->quote);
}
break;
case '\'':
dest->nonnull = 1;
- while(ch=b_getch(input),ch!=EOF && ch!='\'') {
+ while (1) {
+ ch = b_getch(input);
+ if (ch == EOF || ch == '\'')
+ break;
b_addchr(dest,ch);
}
- if (ch==EOF) {
+ if (ch == EOF) {
syntax();
return 1;
}
free((char*)cwd);
{
struct variables *cur, *tmp;
- for(cur = top_vars; cur; cur = tmp) {
+ for (cur = top_vars; cur; cur = tmp) {
tmp = cur->next;
if (!cur->flg_read_only) {
free(cur->name);
projects / oweals / busybox.git / commitdiff