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We no longer default to creating a new SV for GvSV.
[perl5.git] / cygwin / cygwin.c
CommitLineData
5db16f6a
FE
1/*
2 * Cygwin extras
3 */
4
5#include "EXTERN.h"
6#include "perl.h"
7#undef USE_DYNAMIC_LOADING
8#include "XSUB.h"
9
6b49d266 10#include <unistd.h>
b4bcd662 11#include <process.h>
49fd6edc 12#include <sys/cygwin.h>
5db16f6a 13
b4bcd662
GS
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 */
19static int
20do_spawnvp (const char *path, const char * const *argv)
21{
acfe0abc 22 dTHX;
b4bcd662
GS
23 Sigsave_t ihand,qhand;
24 int childpid, result, status;
25
26 rsignal_save(SIGINT, SIG_IGN, &ihand);
27 rsignal_save(SIGQUIT, SIG_IGN, &qhand);
28 childpid = spawnvp(_P_NOWAIT,path,argv);
29 if (childpid < 0) {
30 status = -1;
411caa50 31 if(ckWARN(WARN_EXEC))
f98bc0c6 32 Perl_warner(aTHX_ packWARN(WARN_EXEC),"Can't spawn \"%s\": %s",
b4bcd662 33 path,Strerror (errno));
b4bcd662
GS
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
46int
47do_aspawn (SV *really, void **mark, void **sp)
48{
acfe0abc 49 dTHX;
b4bcd662
GS
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(*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
79int
80do_spawn (char *cmd)
81{
acfe0abc 82 dTHX;
b4bcd662
GS
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 New (1303,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}
5db16f6a
FE
138
139/* see also Cwd.pm */
140static
141XS(Cygwin_cwd)
142{
143 dXSARGS;
144 char *cwd;
145
146 if(items != 0)
147 Perl_croak(aTHX_ "Usage: Cwd::cwd()");
47dafe4d 148 if((cwd = getcwd(NULL, -1))) {
5db16f6a
FE
149 ST(0) = sv_2mortal(newSVpv(cwd, 0));
150 safesysfree(cwd);
6be3b590
JH
151#ifndef INCOMPLETE_TAINTS
152 SvTAINTED_on(ST(0));
153#endif
5db16f6a
FE
154 XSRETURN(1);
155 }
156 XSRETURN_UNDEF;
157}
158
49fd6edc
YST
159static
160XS(XS_Cygwin_pid_to_winpid)
161{
162 dXSARGS;
d2dc0126
YST
163 dXSTARG;
164 pid_t pid, RETVAL;
165
49fd6edc
YST
166 if (items != 1)
167 Perl_croak(aTHX_ "Usage: Cygwin::pid_to_winpid(pid)");
d2dc0126
YST
168
169 pid = (pid_t)SvIV(ST(0));
170
49fd6edc
YST
171 if ((RETVAL = cygwin_internal(CW_CYGWIN_PID_TO_WINPID, pid)) > 0) {
172 XSprePUSH; PUSHi((IV)RETVAL);
173 XSRETURN(1);
174 }
175 XSRETURN_UNDEF;
176}
177
178static
179XS(XS_Cygwin_winpid_to_pid)
180{
181 dXSARGS;
d2dc0126
YST
182 dXSTARG;
183 pid_t pid, RETVAL;
184
49fd6edc
YST
185 if (items != 1)
186 Perl_croak(aTHX_ "Usage: Cygwin::winpid_to_pid(pid)");
d2dc0126
YST
187
188 pid = (pid_t)SvIV(ST(0));
189
49fd6edc
YST
190 if ((RETVAL = cygwin32_winpid_to_pid(pid)) > 0) {
191 XSprePUSH; PUSHi((IV)RETVAL);
192 XSRETURN(1);
193 }
194 XSRETURN_UNDEF;
195}
196
197
5db16f6a
FE
198void
199init_os_extras(void)
200{
201 char *file = __FILE__;
202 dTHX;
203
204 newXS("Cwd::cwd", Cygwin_cwd, file);
49fd6edc
YST
205 newXS("Cygwin::winpid_to_pid", XS_Cygwin_winpid_to_pid, file);
206 newXS("Cygwin::pid_to_winpid", XS_Cygwin_pid_to_winpid, file);
5db16f6a 207}