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/*
* Cygwin extras
*/
#include "EXTERN.h"
#include "perl.h"
#undef USE_DYNAMIC_LOADING
#include "XSUB.h"
#include <unistd.h>
#include <process.h>
/*
* pp_system() implemented via spawn()
* - more efficient and useful when embedding Perl in non-Cygwin apps
* - code mostly borrowed from djgpp.c
*/
static int
do_spawnvp (const char *path, const char * const *argv)
{
dTHXo;
Sigsave_t ihand,qhand;
int childpid, result, status;
rsignal_save(SIGINT, SIG_IGN, &ihand);
rsignal_save(SIGQUIT, SIG_IGN, &qhand);
childpid = spawnvp(_P_NOWAIT,path,argv);
if (childpid < 0) {
status = -1;
if(ckWARN(WARN_EXEC)) {
dTHR;
Perl_warner(aTHX_ WARN_EXEC,"Can't spawn \"%s\": %s",
path,Strerror (errno));
}
} else {
do {
result = wait4pid(childpid, &status, 0);
} while (result == -1 && errno == EINTR);
if(result < 0)
status = -1;
}
(void)rsignal_restore(SIGINT, &ihand);
(void)rsignal_restore(SIGQUIT, &qhand);
return status;
}
int
do_aspawn (SV *really, void **mark, void **sp)
{
dTHXo;
int rc;
char **a,*tmps,**argv;
STRLEN n_a;
if (sp<=mark)
return -1;
a=argv=(char**) alloca ((sp-mark+3)*sizeof (char*));
while (++mark <= sp)
if (*mark)
*a++ = SvPVx(*mark, n_a);
else
*a++ = "";
*a = Nullch;
if (argv[0][0] != '/' && argv[0][0] != '\\'
&& !(argv[0][0] && argv[0][1] == ':'
&& (argv[0][2] == '/' || argv[0][2] != '\\'))
) /* will swawnvp use PATH? */
TAINT_ENV(); /* testing IFS here is overkill, probably */
if (really && *(tmps = SvPV(really, n_a)))
rc=do_spawnvp (tmps,(const char * const *)argv);
else
rc=do_spawnvp (argv[0],(const char *const *)argv);
return rc;
}
int
do_spawn (char *cmd)
{
dTHXo;
char **a,*s,*metachars = "$&*(){}[]'\";\\?>|<~`\n";
const char *command[4];
while (*cmd && isSPACE(*cmd))
cmd++;
if (strnEQ (cmd,"/bin/sh",7) && isSPACE (cmd[7]))
cmd+=5;
/* save an extra exec if possible */
/* see if there are shell metacharacters in it */
if (strstr (cmd,"..."))
goto doshell;
if (*cmd=='.' && isSPACE (cmd[1]))
goto doshell;
if (strnEQ (cmd,"exec",4) && isSPACE (cmd[4]))
goto doshell;
for (s=cmd; *s && isALPHA (*s); s++) ; /* catch VAR=val gizmo */
if (*s=='=')
goto doshell;
for (s=cmd; *s; s++)
if (strchr (metachars,*s))
{
if (*s=='\n' && s[1]=='\0')
{
*s='\0';
break;
}
doshell:
command[0] = "sh";
command[1] = "-c";
command[2] = cmd;
command[3] = NULL;
return do_spawnvp("sh",command);
}
New (1303,PL_Argv,(s-cmd)/2+2,char*);
PL_Cmd=savepvn (cmd,s-cmd);
a=PL_Argv;
for (s=PL_Cmd; *s;) {
while (*s && isSPACE (*s)) s++;
if (*s)
*(a++)=s;
while (*s && !isSPACE (*s)) s++;
if (*s)
*s++='\0';
}
*a=Nullch;
if (!PL_Argv[0])
return -1;
return do_spawnvp(PL_Argv[0],(const char * const *)PL_Argv);
}
/* see also Cwd.pm */
static
XS(Cygwin_cwd)
{
dXSARGS;
char *cwd;
if(items != 0)
Perl_croak(aTHX_ "Usage: Cwd::cwd()");
if((cwd = getcwd(NULL, -1))) {
ST(0) = sv_2mortal(newSVpv(cwd, 0));
safesysfree(cwd);
XSRETURN(1);
}
XSRETURN_UNDEF;
}
void
init_os_extras(void)
{
char *file = __FILE__;
dTHX;
newXS("Cwd::cwd", Cygwin_cwd, file);
}
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