/*
returns:
0 in case of succes
1 in ... (still not in use)
2 in syntax error
-1 in unexpected error
*/
int parse_cmd_line (cmd_line_t *cmd_line, const char *cmd) {
size_t prv_cmd_beg = 0, i, cmd_len;
/*used to get return of functions*/
int raux;
/*STDIN, STDOUT, STDERR*/
int io_redir_seen=-1;
/*return status*/
int ret = 0;
sysfail (cmd_line==NULL, -1);
cmd_len = strlen (cmd);
/*assuming that the last thing is io redirection or nonblocking indicator*/
for (i=0; i < cmd_len && !IS_IO_REDIR (cmd[i]) && !IS_NONBLOCK (cmd[i]); ++i) {
if (IS_PIPE (cmd[i])) {
raux = pipe_list_push_cmd (cmd_line, cmd + prv_cmd_beg, i-prv_cmd_beg);
sysfail (raux<0, -1);
prv_cmd_beg = i + 1;
}
}
/*last command (the one that comes after the last pipe)*/
if (prv_cmd_beg < cmd_len) {
raux = pipe_list_push_cmd (cmd_line, cmd + prv_cmd_beg, i-prv_cmd_beg);
sysfail (raux<0, -1);
if (IS_EMPTY_LINE (raux)) {
if (cmd_line->pipe_list_head != NULL)
ret |= SYNTAX_ERROR;
else ret |= EMPTY_LINE;
return ret;
}
prv_cmd_beg = i + 1;
}
for (;i < cmd_len && !IS_NONBLOCK(cmd[i]); ++i) {
/*todo: recognize output redir*/
if (IS_IO_REDIR (cmd[i])) {
if (io_redir_seen != -1)
cmd_line->io[io_redir_seen] = stringndup (cmd + prv_cmd_beg, i-prv_cmd_beg);
prv_cmd_beg = i + 1;
io_redir_seen = (IS_INPUT_REDIR (cmd[i])) ? 0 : 1;
}
else if (IS_PIPE (cmd[i]))
ret |= SYNTAX_ERROR;
}
if (prv_cmd_beg < cmd_len && io_redir_seen != -1)
cmd_line->io[io_redir_seen] = stringndup (cmd + prv_cmd_beg, i-prv_cmd_beg);
/*if it is non_block it must be the last thing*/
cmd_line->is_nonblock = i < cmd_len && IS_NONBLOCK (cmd[i]);
if (i < cmd_len-1)
ret |= SYNTAX_ERROR;
return ret;
}
/*int set_job_foreground(list_node_t *n)
{
int aux, status;
aux = tcsetpgrp(0, n->value->pgid);
sysfail (aux < 0, -1);
aux = kill(-n->value->pgid, SIGCONT);
sysfail (aux < 0, -1);
while(1)
{
aux = waitpid(-1, &status, WUNTRACED);
if(set_job_status(aux, status) < 0)
break;
}
sysfail (aux < 0, -1);
aux = tcsetpgrp(0, getpgrp());
sysfail (aux < 0, -1);
return 0;
}*/
int set_job_foreground(list_node_t *n)
{
int aux = kill(-n->value->pid, SIGCONT);
sysfail(aux < 0, -1);
tcsetpgrp(STDIN_FILENO, n->value->pgid);
aux = waitpid(n->value->pid, NULL, 0);
sysfail(aux < 0, -1);
tcsetpgrp(STDIN_FILENO, getpgid(0));
return aux;
}
/* Alocate memory for a command_t. */
buffer_t *new_command_line (void)
{
buffer_t *command_line;
command_line = malloc (sizeof(buffer_t));
sysfail (!command_line, NULL);
command_line->size = BUFFER_STEP;
command_line->buffer = malloc (BUFFER_STEP * sizeof(char));
if (command_line->buffer == NULL)
{
free (command_line);
sysfail (1, NULL);
}
return command_line;
}
sh_string *new_command_line (void)
{
sh_string *command_line;
command_line = malloc (sizeof(sh_string));
sysfail (!command_line, NULL);
command_line->size = STRING_SIZE;
command_line->buffer = malloc (STRING_SIZE *sizeof(char));
if (command_line->buffer == NULL)
{
free (command_line);
sysfail (1, NULL);
}
return command_line;
}
static void read_stdin(void)
{
int anydone, r;
char *newline, *space;
anydone= 0;
while (!anydone || used)
{
while (!(newline= memchr(buf,'\n',used)))
{
if (used == avail)
{
avail += 20;
avail <<= 1;
buf= realloc(buf,avail);
if (!buf) sysfail("realloc stdin buffer",errno);
}
do
{
r= read(0,buf+used,avail-used);
}
while (r < 0 && errno == EINTR);
if (r == 0)
{
if (used)
{
/* fake up final newline */
buf[used++]= '\n';
r= 1;
}
else
{
ov_pipe= 0;
return;
}
}
if (r < 0) sysfail("read stdin",errno);
used += r;
}
*newline++= 0;
space= strchr(buf,' ');
if (space) *space++= 0;
process_optarg(buf,0,space);
used -= (newline-buf);
memmove(buf,newline,used);
anydone= 1;
}
}
void *xmalloc(size_t sz) {
void *p;
p= malloc(sz);
if (!p) sysfail("malloc",sz);
return p;
}
/*cmd_str -> start of the command
n -> number of bytes which is in the command
*/
struct qelem *new_qelem (const char *cmd_str, size_t n) {
struct qelem *rqelem = malloc (sizeof (struct qelem));
sysfail (rqelem==NULL, NULL);
rqelem->q_forw = NULL;
rqelem->q_back = NULL;
rqelem->q_data = (char *)stringndup (cmd_str, n);
return rqelem;
}
cmd_line_t* new_cmd_line (void) {
cmd_line_t *cmd = malloc (sizeof (cmd_line_t));
sysfail (cmd==NULL, NULL);
cmd->io[0] = cmd->io[1] = cmd->io[2] = NULL;
cmd->pipe_list_head = NULL;
cmd->pipe_list_tail = NULL;
cmd->is_nonblock = 0;
return cmd;
}
int main(int argc, const char *const *argv)
{
struct timeval *tv, tvbuf;
adns_query qu;
void *qun_v;
adns_answer *answer;
int r, maxfd;
fd_set readfds, writefds, exceptfds;
const char *arg;
ensure_adns_init();
while ((arg= *++argv)) process_optarg(arg,&argv,0);
if (!ov_pipe && !ads) usageerr("no domains given, and -f/--pipe not used; try --help");
for (;;)
{
for (;;)
{
qu= ov_asynch ? 0 : outstanding.head ? outstanding.head->qu : 0;
r= adns_check(ads,&qu,&answer,&qun_v);
if ((r == EAGAIN) || (r == EWOULDBLOCK)) break;
if (r == ESRCH)
{
if (!ov_pipe) goto x_quit;
else break;
}
assert(!r);
query_done(qun_v,answer);
}
maxfd= 0;
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
if (ov_pipe)
{
maxfd= 1;
FD_SET(0,&readfds);
}
tv= 0;
adns_beforeselect(ads, &maxfd, &readfds,&writefds,&exceptfds, &tv,&tvbuf,0);
ADNS_CLEAR_ERRNO;
r= select(maxfd, &readfds,&writefds,&exceptfds, tv);
ADNS_CAPTURE_ERRNO;
if (r == -1)
{
if (errno == EINTR) continue;
sysfail("select",errno);
}
adns_afterselect(ads, maxfd, &readfds,&writefds,&exceptfds, 0);
if (ov_pipe && FD_ISSET(0,&readfds)) read_stdin();
}
x_quit:
if (fclose(stdout)) outerr();
quitnow(rcode);
}
char *stringdup (const char *str)
{
char *p;
int n;
n = strlen (str) + 1;
p = malloc (n * sizeof(char));
sysfail (!p, NULL);
strcpy (p, str);
return p;
}
/* Read a line from standard input and store it in command_line->buffer.
The buffer size is enlarged if needed in steps of size BUFFER_STEP.
Return the number of bytes read or -1 on error. */
int read_command_line (buffer_t *command_line)
{
int read_bytes, count, temp;
int read_more = 1;
char *offset, *p;
int howmany;
count = 0;
offset = command_line->buffer;
howmany = command_line->size;
while (read_more)
{
/* Read howmany bytes. */
read_bytes = read(1, offset, howmany);
count += read_bytes;
/* This happens also if the previous read left
a trailing newline. */
if (offset[0] == '\n')
{
offset[0] = '\0';
command_line->length = 0;
return --count;
}
read_more = 0;
if (read_bytes < howmany)
offset[read_bytes - 1] = '\0'; /* We read less than howmany; done. */
else if (offset[read_bytes - 1] == '\n')
offset[read_bytes - 1] = '\0'; /* We read exactly howmany; done. */
else /* There is more to read. */
{
/* Enlarge buffer. */
temp = command_line->size;
p = realloc (command_line->buffer, (temp + BUFFER_STEP) * sizeof(char));
sysfail (!p, -1);
/* Offest is the end of the buffer. */
offset = command_line->buffer + count;
command_line->size += BUFFER_STEP;
howmany = BUFFER_STEP;
read_more = 1;
}
}
command_line->length = count;
return count;
}
void
open_video(void)
{
struct v4l2_format v;
dev_fd = open(device, O_RDWR);
if (dev_fd == -1) sysfail(device);
v.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
vidioc(G_FMT, &v);
v.fmt.pix.width = frame_width;
v.fmt.pix.height = frame_height;
v.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
v.fmt.pix.sizeimage = rgb_frame_bytes;
vidioc(S_FMT, &v);
}
/*
returns -1 in case of error
*/
int pipe_list_push_cmd (cmd_line_t *cmd_line, const char *cmd_str, size_t n) {
struct qelem *nelem = new_qelem (cmd_str, n);
sysfail (nelem==NULL, -1);
if (strlen (nelem->q_data) == 0) {
free (nelem->q_data);
free (nelem);
return EMPTY_LINE;
}
insque (nelem, cmd_line->pipe_list_tail);
cmd_line->pipe_list_tail = nelem;
if (cmd_line->pipe_list_head == NULL)
cmd_line->pipe_list_head = cmd_line->pipe_list_tail;
return EXIT_SUCCESS;
}
void
copy_frames(void)
{
char *frame;
frame = malloc(rgb_frame_bytes);
if (frame == NULL) fail("cannot malloc frame");
//int correctFrame = 0;
//int corruptFrame = 0;
while (1)
{
int size_c = fread(frame, 1, rgb_frame_bytes, stdin);
//printf("%d\n",size_c);
//if(size_c == rgb_frame_bytes)
//{
// correctFrame++;
// printf("%d corrupt frame\n Correct Frame: %d\n",corruptFrame, correctFrame);
// corruptFrame = 0;
//}
//else
//if(size_c != 0)
//{
// printf("%d correct frame\n size = %d\n",correctFrame,size_c);
// correctFrame = 0;
// corruptFrame++;
//}
if ( size_c != rgb_frame_bytes) {
free(frame);
fail("malformed frame");
}
else
{
//TODO: convert yuv frame to rgb -> conversion done in BebopDroneDecodeStream, now reading RGB24 frames from fifo
//if(size_c != 0)
if (write(dev_fd, frame, rgb_frame_bytes) != rgb_frame_bytes) {
free(frame);
sysfail("write");
}
}
//usleep(300);
}
free(frame);
}
/*
copies the first n bytes of a string
also puts a \0 at the end
also trims the string
*/
char *stringndup(const char *str, size_t n) {
char *rstr;
int poff=0; /*offset, how many bytes are blank at the begining*/
/*triming*/
while (str[poff] != '\0' && (iscntrl (str[poff]) || isblank (str[poff])))
poff++;
n -= poff;
while (n>0 && (iscntrl (str[poff + n-1]) || isblank (str[poff + n - 1])))
--n;
/*end triming*/
rstr = malloc (sizeof (char) * (n+1));
sysfail (rstr==NULL, NULL);
rstr[n] = '\0';
strncpy (rstr, str + poff, n);
return rstr;
}
/* Allocate memory for a new pipeline. */
pipeline_t *new_pipeline (void)
{
pipeline_t *pipeline;
int i, j;
pipeline = malloc (1 * sizeof(pipeline_t));
sysfail (!pipeline, NULL);
/* Allocate a pipeline structure. */
pipeline->command = malloc ((MAX_COMMANDS + 1) * sizeof(char **));
if (!pipeline->command)
{
sysdebug (1);
free (pipeline);
return NULL;
}
/* Allocate memory for commands. */
for (i = 0; i < MAX_COMMANDS + 1; i++)
{
pipeline->command[i] = malloc ((MAX_ARGUMENTS + 1) * sizeof (char *));
if (!pipeline->command[i])
{
sysdebug(1);
for (j = 0; j < i; j++)
free (pipeline->command[j]);
free(pipeline->command);
free (pipeline);
return NULL;
}
}
pipeline->ground = FOREGROUND;
pipeline->file_in[0] = '\0';
pipeline->file_out[0] = '\0';
return pipeline;
}
int runcmd (const char *command, int *result, int *io) /* ToDO: const char* */
{
int pid, status;
int aux, i, tmp_result;
char *args[RCMD_MAXARGS], *p, *cmd;
FILE *fp=NULL;
tmp_result = 0;
/* Parse arguments to obtain an argv vector. */
cmd = malloc ((strlen (command)+1) * sizeof(char));
sysfail (!cmd, -1);
p = strcpy (cmd, command);
i=0;
args[i++] = strtok (cmd, RCMD_DELIM);
while ((i<RCMD_MAXARGS) && (args[i++] = strtok (NULL, RCMD_DELIM)));
i--;
/* Create a subprocess. */
pid = fork();
sysfail (pid<0, -1);
if (pid>0) /* Caller process (parent). */
{
aux = wait (&status);
sysfail (aux<0, -1);
/* Collect termination mode. */
if (WIFEXITED(status)){
tmp_result |= NORMTERM;
fp = fopen("check.txt","r");
if(fp == NULL){
tmp_result |= WEXITSTATUS(status);
tmp_result |= EXECOK;
}
else{
tmp_result |= EXECFAILSTATUS & RETSTATUS;
fclose(fp);
remove("check.txt");
}
}
}
else /* Subprocess (child) */
{
aux = execvp (args[0], args);
if(aux <= -1){
fp = fopen("check.txt","w");
fclose(fp);
}
exit (EXECFAILSTATUS);
}
if (result)
*result = tmp_result;
free (p);
return pid; /* Only parent reaches this point. */
}
void outerr(void)
{
sysfail("write to stdout",errno);
}
static void printusage(void) {
static const struct optioninfo *const all_optiontables[]= {
global_options, perquery_options, 0
};
const struct optioninfo *const *oiap, *oip=0;
int maxsopt, maxlopt, l;
maxsopt= maxlopt= 0;
for (oiap=all_optiontables; *oiap; oiap++) {
for (oip=*oiap; oip->type != ot_end; oip++) {
if (oip->type == ot_funcarg) continue;
if (oip->sopt) { l= strlen(oip->sopt); if (l>maxsopt) maxsopt= l; }
if (oip->lopt) {
l= strlen(oip->lopt);
if (oip->type == ot_flag && !oip->value) l+= 3;
if (l>maxlopt) maxlopt= l;
}
}
}
fputs("usage: adnshost [global-opts] [query-opts] query-domain\n"
" [[query-opts] query-domain ...]\n"
" adnshost [global-opts] [query-opts] -f|--pipe\n",
stdout);
for (oiap=all_optiontables; *oiap; oiap++) {
putchar('\n');
for (oip=*oiap; oip->type != ot_end; oip++) {
switch (oip->type) {
case ot_flag:
if (!oip->value) {
if (oip->sopt) {
printf(" +%-*s --no-%-*s %s\n",
maxsopt, oip->sopt,
maxlopt-2, oip->lopt,
oip->desc);
} else {
printf(" --no-%-*s %s\n",
maxlopt+maxsopt+1, oip->lopt,
oip->desc);
}
break;
}
case ot_value: case ot_func: /* fall through */
if (oip->sopt) {
printf(" -%-*s --%-*s %s\n",
maxsopt, oip->sopt,
maxlopt+1, oip->lopt,
oip->desc);
} else {
printf(" --%-*s %s\n",
maxlopt+maxsopt+3, oip->lopt,
oip->desc);
}
break;
case ot_funcarg:
if (oip->sopt) {
l= (maxlopt + maxsopt - 9 -
(strlen(oip->sopt) + strlen(oip->lopt) + 2*strlen(oip->argdesc)));
printf(" -%s<%s> / --%s <%s>%*s%s\n",
oip->sopt, oip->argdesc, oip->lopt, oip->argdesc,
l>2 ? l : 2, "",
oip->desc);
} else {
l= (maxlopt + maxsopt + 1 -
(strlen(oip->lopt) + strlen(oip->argdesc)));
printf(" --%s <%s>%*s%s\n",
oip->lopt, oip->argdesc,
l>2 ? l : 2, "",
oip->desc);
}
break;
case ot_funcarg2:
assert(!oip->sopt);
l= (maxlopt + maxsopt - 2 -
(strlen(oip->lopt) + strlen(oip->argdesc) + strlen(oip->argdesc2)));
printf(" --%s <%s> <%s>%*s%s\n",
oip->lopt, oip->argdesc, oip->argdesc2,
l>2 ? l : 2, "",
oip->desc);
break;
case ot_desconly:
printf("%s\n", oip->desc);
break;
default:
abort();
}
}
}
printf("\nEscaping domains which might start with `-':\n"
" - %-*s Next argument is a domain, but more options may follow\n",
maxlopt+maxsopt+3, "<domain>");
fputs("\n"
"Query domains should always be quoted according to master file format.\n"
"\n"
"For binary options, --FOO and --no-FOO are opposites, as are\n"
"-X and +X. In each case the default is the one not listed.\n"
"Per query options stay set a particular way until they are reset,\n"
"whether they appear on the command line or on stdin.\n"
"All global options must preceed the first query domain.\n"
"\n"
"With -f, the input should be lines with either an option, possibly\n"
"with a value argument (separated from the option by a space if it's a long\n"
"option), or a domain (possibly preceded by a hyphen and a space to\n"
"distinguish it from an option).\n"
"\n"
"Output format is master file format without class or TTL by default:\n"
" [<owner>] [<ttl>] [<type>] <data>\n"
"or if the <owner> domain refers to a CNAME and --show-cname is on\n"
" [<owner>] [<ttl>] CNAME <cname>\n"
" [<cname>] [<ttl>] <type> <data>\n"
"When a query fails you get an error message to stderr (with --fmt-simple).\n"
"Specify --fmt-inline for lines like this (broken here for readability):\n"
" ; failed <statustype> <statusnum> <statusabbrev> \\\n"
" [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
"If you use --fmt-asynch, which is the default for --asynch,\n"
"each answer (success or failure) is preceded by a line\n"
" <id> <nrrs> <statustype> <statusnum> <statusabbrev> \\\n"
" [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
"where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n"
"the CNAME target; the CNAME indirection and error formats above are not used.\n"
"\n"
"Exit status:\n"
" 0 all went well\n"
" 1-6 at least one query failed with statustype:\n"
" 1 localfail )\n"
" 2 remotefail ) temporary errors\n"
" 3 tempfail __)_________________\n"
" 4 misconfig )\n"
" 5 misquery ) permanent errors\n"
" 6 permfail )\n"
" 10 system trouble\n"
" 11 usage problems\n"
"\n"
"Query types (see adns.h; default is addr):\n"
" ns soa ptr mx rp addr - enhanced versions\n"
" cname hinfo txt - types with only one version\n"
" a ns- soa- ptr- mx- rp- - _raw versions\n"
"Default is addr, or ptr for -i/--ptr queries\n",
stdout);
if (ferror(stdout)) sysfail("write usage message",errno);
}
void of_help(const struct optioninfo *oi, const char *arg, const char *arg2) {
printusage();
if (fclose(stdout)) sysfail("finish writing output",errno);
quitnow(0);
}
