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const'ing in cygwin.c
[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>
a25ce5f3 13#include <mntent.h>
6d7e4387 14#include <alloca.h>
9fb265f7 15#include <dlfcn.h>
5db16f6a 16
b4bcd662
GS
17/*
18 * pp_system() implemented via spawn()
19 * - more efficient and useful when embedding Perl in non-Cygwin apps
20 * - code mostly borrowed from djgpp.c
21 */
22static int
23do_spawnvp (const char *path, const char * const *argv)
24{
acfe0abc 25 dTHX;
b4bcd662
GS
26 Sigsave_t ihand,qhand;
27 int childpid, result, status;
28
ec1aec95
YST
29 rsignal_save(SIGINT, (Sighandler_t) SIG_IGN, &ihand);
30 rsignal_save(SIGQUIT, (Sighandler_t) SIG_IGN, &qhand);
b4bcd662
GS
31 childpid = spawnvp(_P_NOWAIT,path,argv);
32 if (childpid < 0) {
33 status = -1;
411caa50 34 if(ckWARN(WARN_EXEC))
f98bc0c6 35 Perl_warner(aTHX_ packWARN(WARN_EXEC),"Can't spawn \"%s\": %s",
b4bcd662 36 path,Strerror (errno));
b4bcd662
GS
37 } else {
38 do {
39 result = wait4pid(childpid, &status, 0);
40 } while (result == -1 && errno == EINTR);
41 if(result < 0)
42 status = -1;
43 }
44 (void)rsignal_restore(SIGINT, &ihand);
45 (void)rsignal_restore(SIGQUIT, &qhand);
46 return status;
47}
48
49int
50do_aspawn (SV *really, void **mark, void **sp)
51{
acfe0abc 52 dTHX;
b4bcd662
GS
53 int rc;
54 char **a,*tmps,**argv;
55 STRLEN n_a;
56
57 if (sp<=mark)
58 return -1;
59 a=argv=(char**) alloca ((sp-mark+3)*sizeof (char*));
60
61 while (++mark <= sp)
62 if (*mark)
667e2948 63 *a++ = SvPVx((SV *)*mark, n_a);
b4bcd662
GS
64 else
65 *a++ = "";
66 *a = Nullch;
67
68 if (argv[0][0] != '/' && argv[0][0] != '\\'
69 && !(argv[0][0] && argv[0][1] == ':'
70 && (argv[0][2] == '/' || argv[0][2] != '\\'))
71 ) /* will swawnvp use PATH? */
72 TAINT_ENV(); /* testing IFS here is overkill, probably */
73
74 if (really && *(tmps = SvPV(really, n_a)))
75 rc=do_spawnvp (tmps,(const char * const *)argv);
76 else
77 rc=do_spawnvp (argv[0],(const char *const *)argv);
78
79 return rc;
80}
81
82int
83do_spawn (char *cmd)
84{
acfe0abc 85 dTHX;
3f5211dd
JH
86 char const **a;
87 char *s,*metachars = "$&*(){}[]'\";\\?>|<~`\n";
b4bcd662
GS
88 const char *command[4];
89
90 while (*cmd && isSPACE(*cmd))
91 cmd++;
92
93 if (strnEQ (cmd,"/bin/sh",7) && isSPACE (cmd[7]))
94 cmd+=5;
95
96 /* save an extra exec if possible */
97 /* see if there are shell metacharacters in it */
98 if (strstr (cmd,"..."))
99 goto doshell;
100 if (*cmd=='.' && isSPACE (cmd[1]))
101 goto doshell;
102 if (strnEQ (cmd,"exec",4) && isSPACE (cmd[4]))
103 goto doshell;
104 for (s=cmd; *s && isALPHA (*s); s++) ; /* catch VAR=val gizmo */
105 if (*s=='=')
106 goto doshell;
107
108 for (s=cmd; *s; s++)
109 if (strchr (metachars,*s))
110 {
111 if (*s=='\n' && s[1]=='\0')
112 {
113 *s='\0';
114 break;
115 }
116 doshell:
117 command[0] = "sh";
118 command[1] = "-c";
119 command[2] = cmd;
120 command[3] = NULL;
121
122 return do_spawnvp("sh",command);
123 }
124
3f5211dd 125 Newx (PL_Argv,(s-cmd)/2+2,const char*);
b4bcd662
GS
126 PL_Cmd=savepvn (cmd,s-cmd);
127 a=PL_Argv;
128 for (s=PL_Cmd; *s;) {
129 while (*s && isSPACE (*s)) s++;
130 if (*s)
131 *(a++)=s;
132 while (*s && !isSPACE (*s)) s++;
133 if (*s)
134 *s++='\0';
135 }
136 *a=Nullch;
137 if (!PL_Argv[0])
138 return -1;
139
140 return do_spawnvp(PL_Argv[0],(const char * const *)PL_Argv);
141}
5db16f6a
FE
142
143/* see also Cwd.pm */
5db16f6a
FE
144XS(Cygwin_cwd)
145{
146 dXSARGS;
147 char *cwd;
148
482150a7
JH
149 /* See http://rt.perl.org/rt3/Ticket/Display.html?id=38628
150 There is Cwd->cwd() usage in the wild, and previous versions didn't die.
151 */
152 if(items > 1)
5db16f6a 153 Perl_croak(aTHX_ "Usage: Cwd::cwd()");
47dafe4d 154 if((cwd = getcwd(NULL, -1))) {
5db16f6a 155 ST(0) = sv_2mortal(newSVpv(cwd, 0));
a236cecb 156 free(cwd);
6be3b590
JH
157#ifndef INCOMPLETE_TAINTS
158 SvTAINTED_on(ST(0));
159#endif
5db16f6a
FE
160 XSRETURN(1);
161 }
162 XSRETURN_UNDEF;
163}
164
49fd6edc
YST
165XS(XS_Cygwin_pid_to_winpid)
166{
167 dXSARGS;
d2dc0126
YST
168 dXSTARG;
169 pid_t pid, RETVAL;
170
49fd6edc
YST
171 if (items != 1)
172 Perl_croak(aTHX_ "Usage: Cygwin::pid_to_winpid(pid)");
d2dc0126
YST
173
174 pid = (pid_t)SvIV(ST(0));
175
49fd6edc
YST
176 if ((RETVAL = cygwin_internal(CW_CYGWIN_PID_TO_WINPID, pid)) > 0) {
177 XSprePUSH; PUSHi((IV)RETVAL);
178 XSRETURN(1);
179 }
180 XSRETURN_UNDEF;
181}
182
49fd6edc
YST
183XS(XS_Cygwin_winpid_to_pid)
184{
185 dXSARGS;
d2dc0126
YST
186 dXSTARG;
187 pid_t pid, RETVAL;
188
49fd6edc
YST
189 if (items != 1)
190 Perl_croak(aTHX_ "Usage: Cygwin::winpid_to_pid(pid)");
d2dc0126
YST
191
192 pid = (pid_t)SvIV(ST(0));
193
49fd6edc
YST
194 if ((RETVAL = cygwin32_winpid_to_pid(pid)) > 0) {
195 XSprePUSH; PUSHi((IV)RETVAL);
196 XSRETURN(1);
197 }
198 XSRETURN_UNDEF;
199}
200
15414d2b
RU
201XS(XS_Cygwin_win_to_posix_path)
202{
203 dXSARGS;
204 int absolute_flag = 0;
205 STRLEN len;
206 int err;
207 char *pathname, *buf;
208
209 if (items < 1 || items > 2)
210 Perl_croak(aTHX_ "Usage: Cygwin::win_to_posix_path(pathname, [absolute])");
211
212 pathname = SvPV(ST(0), len);
213 if (items == 2)
214 absolute_flag = SvTRUE(ST(1));
215
216 if (!len)
217 Perl_croak(aTHX_ "can't convert empty path");
218 buf = (char *) safemalloc (len + 260 + 1001);
219
220 if (absolute_flag)
221 err = cygwin_conv_to_full_posix_path(pathname, buf);
222 else
223 err = cygwin_conv_to_posix_path(pathname, buf);
224 if (!err) {
225 ST(0) = sv_2mortal(newSVpv(buf, 0));
226 safefree(buf);
227 XSRETURN(1);
228 } else {
229 safefree(buf);
230 XSRETURN_UNDEF;
231 }
232}
233
234XS(XS_Cygwin_posix_to_win_path)
235{
236 dXSARGS;
237 int absolute_flag = 0;
238 STRLEN len;
239 int err;
240 char *pathname, *buf;
241
242 if (items < 1 || items > 2)
243 Perl_croak(aTHX_ "Usage: Cygwin::posix_to_win_path(pathname, [absolute])");
244
245 pathname = SvPV(ST(0), len);
246 if (items == 2)
247 absolute_flag = SvTRUE(ST(1));
248
249 if (!len)
250 Perl_croak(aTHX_ "can't convert empty path");
251 buf = (char *) safemalloc(len + 260 + 1001);
252
253 if (absolute_flag)
254 err = cygwin_conv_to_full_win32_path(pathname, buf);
255 else
256 err = cygwin_conv_to_win32_path(pathname, buf);
257 if (!err) {
258 ST(0) = sv_2mortal(newSVpv(buf, 0));
259 safefree(buf);
260 XSRETURN(1);
261 } else {
262 safefree(buf);
263 XSRETURN_UNDEF;
264 }
265}
266
a25ce5f3
RU
267XS(XS_Cygwin_mount_table)
268{
269 dXSARGS;
270 struct mntent *mnt;
271
272 if (items != 0)
273 Perl_croak(aTHX_ "Usage: Cygwin::mount_table");
274 /* => array of [mnt_dir mnt_fsname mnt_type mnt_opts] */
275
276 setmntent (0, 0);
277 while ((mnt = getmntent (0))) {
278 AV* av = newAV();
279 av_push(av, newSVpvn(mnt->mnt_dir, strlen(mnt->mnt_dir)));
280 av_push(av, newSVpvn(mnt->mnt_fsname, strlen(mnt->mnt_fsname)));
281 av_push(av, newSVpvn(mnt->mnt_type, strlen(mnt->mnt_type)));
282 av_push(av, newSVpvn(mnt->mnt_opts, strlen(mnt->mnt_opts)));
283 XPUSHs(sv_2mortal(newRV_noinc((SV*)av)));
284 }
285 endmntent (0);
286 PUTBACK;
287}
288
289XS(XS_Cygwin_mount_flags)
290{
291 dXSARGS;
292 char *pathname;
293 char flags[260];
294
295 if (items != 1)
74dc058d 296 Perl_croak(aTHX_ "Usage: Cygwin::mount_flags(mnt_dir|'/cygwin')");
a25ce5f3
RU
297
298 pathname = SvPV_nolen(ST(0));
74dc058d
JH
299
300 /* TODO: Check for cygdrive registry setting,
301 * and then use CW_GET_CYGDRIVE_INFO
a25ce5f3
RU
302 */
303 if (!strcmp(pathname, "/cygdrive")) {
304 char user[260];
305 char system[260];
306 char user_flags[260];
307 char system_flags[260];
74dc058d 308
a25ce5f3
RU
309 cygwin_internal (CW_GET_CYGDRIVE_INFO, user, system, user_flags,
310 system_flags);
74dc058d
JH
311
312 if (strlen(user) > 0) {
313 sprintf(flags, "%s,cygdrive,%s", user_flags, user);
314 } else {
315 sprintf(flags, "%s,cygdrive,%s", system_flags, system);
316 }
317
a25ce5f3
RU
318 ST(0) = sv_2mortal(newSVpv(flags, 0));
319 XSRETURN(1);
74dc058d 320
a25ce5f3
RU
321 } else {
322 struct mntent *mnt;
323 setmntent (0, 0);
324 while ((mnt = getmntent (0))) {
325 if (!strcmp(pathname, mnt->mnt_dir)) {
326 strcpy(flags, mnt->mnt_type);
327 if (strlen(mnt->mnt_opts) > 0) {
328 strcat(flags, ",");
329 strcat(flags, mnt->mnt_opts);
330 }
331 break;
332 }
333 }
334 endmntent (0);
335 ST(0) = sv_2mortal(newSVpv(flags, 0));
336 XSRETURN(1);
337 }
338}
339
15414d2b
RU
340XS(XS_Cygwin_is_binmount)
341{
342 dXSARGS;
343 char *pathname;
344
345 if (items != 1)
346 Perl_croak(aTHX_ "Usage: Cygwin::is_binmount(pathname)");
347
348 pathname = SvPV_nolen(ST(0));
349
350 ST(0) = boolSV(cygwin_internal(CW_GET_BINMODE, pathname));
351 XSRETURN(1);
352}
353
5db16f6a
FE
354void
355init_os_extras(void)
356{
5db16f6a 357 dTHX;
9fb265f7
JD
358 char *file = __FILE__;
359 void *handle;
5db16f6a
FE
360
361 newXS("Cwd::cwd", Cygwin_cwd, file);
15414d2b
RU
362 newXSproto("Cygwin::winpid_to_pid", XS_Cygwin_winpid_to_pid, file, "$");
363 newXSproto("Cygwin::pid_to_winpid", XS_Cygwin_pid_to_winpid, file, "$");
364 newXSproto("Cygwin::win_to_posix_path", XS_Cygwin_win_to_posix_path, file, "$;$");
365 newXSproto("Cygwin::posix_to_win_path", XS_Cygwin_posix_to_win_path, file, "$;$");
a25ce5f3
RU
366 newXSproto("Cygwin::mount_table", XS_Cygwin_mount_table, file, "");
367 newXSproto("Cygwin::mount_flags", XS_Cygwin_mount_flags, file, "$");
15414d2b 368 newXSproto("Cygwin::is_binmount", XS_Cygwin_is_binmount, file, "$");
78ff2d7b 369
9fb265f7
JD
370 /* Initialize Win32CORE if it has been statically linked. */
371 handle = dlopen(NULL, RTLD_LAZY);
372 if (handle) {
373 void (*pfn_init)(pTHX);
374 pfn_init = (void (*)(pTHX))dlsym(handle, "init_Win32CORE");
375 if (pfn_init)
376 pfn_init(aTHX);
377 dlclose(handle);
78ff2d7b 378 }
5db16f6a 379}