| 1 | /* |
| 2 | * Cygwin extras |
| 3 | */ |
| 4 | |
| 5 | #include "EXTERN.h" |
| 6 | #include "perl.h" |
| 7 | #undef USE_DYNAMIC_LOADING |
| 8 | #include "XSUB.h" |
| 9 | |
| 10 | #include <unistd.h> |
| 11 | #include <process.h> |
| 12 | #include <sys/cygwin.h> |
| 13 | |
| 14 | /* |
| 15 | * pp_system() implemented via spawn() |
| 16 | * - more efficient and useful when embedding Perl in non-Cygwin apps |
| 17 | * - code mostly borrowed from djgpp.c |
| 18 | */ |
| 19 | static int |
| 20 | do_spawnvp (const char *path, const char * const *argv) |
| 21 | { |
| 22 | dTHX; |
| 23 | Sigsave_t ihand,qhand; |
| 24 | int childpid, result, status; |
| 25 | |
| 26 | rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &ihand); |
| 27 | rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qhand); |
| 28 | childpid = spawnvp(_P_NOWAIT,path,argv); |
| 29 | if (childpid < 0) { |
| 30 | status = -1; |
| 31 | if(ckWARN(WARN_EXEC)) |
| 32 | Perl_warner(aTHX_ packWARN(WARN_EXEC),"Can't spawn \"%s\": %s", |
| 33 | path,Strerror (errno)); |
| 34 | } else { |
| 35 | do { |
| 36 | result = wait4pid(childpid, &status, 0); |
| 37 | } while (result == -1 && errno == EINTR); |
| 38 | if(result < 0) |
| 39 | status = -1; |
| 40 | } |
| 41 | (void)rsignal_restore(SIGINT, &ihand); |
| 42 | (void)rsignal_restore(SIGQUIT, &qhand); |
| 43 | return status; |
| 44 | } |
| 45 | |
| 46 | int |
| 47 | do_aspawn (SV *really, void **mark, void **sp) |
| 48 | { |
| 49 | dTHX; |
| 50 | int rc; |
| 51 | char **a,*tmps,**argv; |
| 52 | STRLEN n_a; |
| 53 | |
| 54 | if (sp<=mark) |
| 55 | return -1; |
| 56 | a=argv=(char**) alloca ((sp-mark+3)*sizeof (char*)); |
| 57 | |
| 58 | while (++mark <= sp) |
| 59 | if (*mark) |
| 60 | *a++ = SvPVx((SV *)*mark, n_a); |
| 61 | else |
| 62 | *a++ = ""; |
| 63 | *a = Nullch; |
| 64 | |
| 65 | if (argv[0][0] != '/' && argv[0][0] != '\\' |
| 66 | && !(argv[0][0] && argv[0][1] == ':' |
| 67 | && (argv[0][2] == '/' || argv[0][2] != '\\')) |
| 68 | ) /* will swawnvp use PATH? */ |
| 69 | TAINT_ENV(); /* testing IFS here is overkill, probably */ |
| 70 | |
| 71 | if (really && *(tmps = SvPV(really, n_a))) |
| 72 | rc=do_spawnvp (tmps,(const char * const *)argv); |
| 73 | else |
| 74 | rc=do_spawnvp (argv[0],(const char *const *)argv); |
| 75 | |
| 76 | return rc; |
| 77 | } |
| 78 | |
| 79 | int |
| 80 | do_spawn (char *cmd) |
| 81 | { |
| 82 | dTHX; |
| 83 | char **a,*s,*metachars = "$&*(){}[]'\";\\?>|<~`\n"; |
| 84 | const char *command[4]; |
| 85 | |
| 86 | while (*cmd && isSPACE(*cmd)) |
| 87 | cmd++; |
| 88 | |
| 89 | if (strnEQ (cmd,"/bin/sh",7) && isSPACE (cmd[7])) |
| 90 | cmd+=5; |
| 91 | |
| 92 | /* save an extra exec if possible */ |
| 93 | /* see if there are shell metacharacters in it */ |
| 94 | if (strstr (cmd,"...")) |
| 95 | goto doshell; |
| 96 | if (*cmd=='.' && isSPACE (cmd[1])) |
| 97 | goto doshell; |
| 98 | if (strnEQ (cmd,"exec",4) && isSPACE (cmd[4])) |
| 99 | goto doshell; |
| 100 | for (s=cmd; *s && isALPHA (*s); s++) ; /* catch VAR=val gizmo */ |
| 101 | if (*s=='=') |
| 102 | goto doshell; |
| 103 | |
| 104 | for (s=cmd; *s; s++) |
| 105 | if (strchr (metachars,*s)) |
| 106 | { |
| 107 | if (*s=='\n' && s[1]=='\0') |
| 108 | { |
| 109 | *s='\0'; |
| 110 | break; |
| 111 | } |
| 112 | doshell: |
| 113 | command[0] = "sh"; |
| 114 | command[1] = "-c"; |
| 115 | command[2] = cmd; |
| 116 | command[3] = NULL; |
| 117 | |
| 118 | return do_spawnvp("sh",command); |
| 119 | } |
| 120 | |
| 121 | Newx (PL_Argv,(s-cmd)/2+2,char*); |
| 122 | PL_Cmd=savepvn (cmd,s-cmd); |
| 123 | a=PL_Argv; |
| 124 | for (s=PL_Cmd; *s;) { |
| 125 | while (*s && isSPACE (*s)) s++; |
| 126 | if (*s) |
| 127 | *(a++)=s; |
| 128 | while (*s && !isSPACE (*s)) s++; |
| 129 | if (*s) |
| 130 | *s++='\0'; |
| 131 | } |
| 132 | *a=Nullch; |
| 133 | if (!PL_Argv[0]) |
| 134 | return -1; |
| 135 | |
| 136 | return do_spawnvp(PL_Argv[0],(const char * const *)PL_Argv); |
| 137 | } |
| 138 | |
| 139 | /* see also Cwd.pm */ |
| 140 | XS(Cygwin_cwd) |
| 141 | { |
| 142 | dXSARGS; |
| 143 | char *cwd; |
| 144 | |
| 145 | if(items != 0) |
| 146 | Perl_croak(aTHX_ "Usage: Cwd::cwd()"); |
| 147 | if((cwd = getcwd(NULL, -1))) { |
| 148 | ST(0) = sv_2mortal(newSVpv(cwd, 0)); |
| 149 | free(cwd); |
| 150 | #ifndef INCOMPLETE_TAINTS |
| 151 | SvTAINTED_on(ST(0)); |
| 152 | #endif |
| 153 | XSRETURN(1); |
| 154 | } |
| 155 | XSRETURN_UNDEF; |
| 156 | } |
| 157 | |
| 158 | XS(XS_Cygwin_pid_to_winpid) |
| 159 | { |
| 160 | dXSARGS; |
| 161 | dXSTARG; |
| 162 | pid_t pid, RETVAL; |
| 163 | |
| 164 | if (items != 1) |
| 165 | Perl_croak(aTHX_ "Usage: Cygwin::pid_to_winpid(pid)"); |
| 166 | |
| 167 | pid = (pid_t)SvIV(ST(0)); |
| 168 | |
| 169 | if ((RETVAL = cygwin_internal(CW_CYGWIN_PID_TO_WINPID, pid)) > 0) { |
| 170 | XSprePUSH; PUSHi((IV)RETVAL); |
| 171 | XSRETURN(1); |
| 172 | } |
| 173 | XSRETURN_UNDEF; |
| 174 | } |
| 175 | |
| 176 | XS(XS_Cygwin_winpid_to_pid) |
| 177 | { |
| 178 | dXSARGS; |
| 179 | dXSTARG; |
| 180 | pid_t pid, RETVAL; |
| 181 | |
| 182 | if (items != 1) |
| 183 | Perl_croak(aTHX_ "Usage: Cygwin::winpid_to_pid(pid)"); |
| 184 | |
| 185 | pid = (pid_t)SvIV(ST(0)); |
| 186 | |
| 187 | if ((RETVAL = cygwin32_winpid_to_pid(pid)) > 0) { |
| 188 | XSprePUSH; PUSHi((IV)RETVAL); |
| 189 | XSRETURN(1); |
| 190 | } |
| 191 | XSRETURN_UNDEF; |
| 192 | } |
| 193 | |
| 194 | |
| 195 | void |
| 196 | init_os_extras(void) |
| 197 | { |
| 198 | char *file = __FILE__; |
| 199 | dTHX; |
| 200 | |
| 201 | newXS("Cwd::cwd", Cygwin_cwd, file); |
| 202 | newXS("Cygwin::winpid_to_pid", XS_Cygwin_winpid_to_pid, file); |
| 203 | newXS("Cygwin::pid_to_winpid", XS_Cygwin_pid_to_winpid, file); |
| 204 | } |