57 |
#include "error.h" |
#include "error.h" |
58 |
|
|
59 |
|
|
60 |
|
#define REALLY_CLOSED -3 /* fd that was closed and still is */ |
61 |
#define EMPTY -2 /* marks an unused slot in redirtab */ |
#define EMPTY -2 /* marks an unused slot in redirtab */ |
62 |
|
#define CLOSED -1 /* fd opened for redir needs to be closed */ |
63 |
|
|
64 |
#ifndef PIPE_BUF |
#ifndef PIPE_BUF |
65 |
# define PIPESIZE 4096 /* amount of buffering in a pipe */ |
# define PIPESIZE 4096 /* amount of buffering in a pipe */ |
66 |
#else |
#else |
119 |
} |
} |
120 |
sv = NULL; |
sv = NULL; |
121 |
INTOFF; |
INTOFF; |
122 |
if (flags & REDIR_PUSH) { |
if (likely(flags & REDIR_PUSH)) { |
123 |
struct redirtab *q; |
struct redirtab *q; |
124 |
q = ckmalloc(sizeof (struct redirtab)); |
q = ckmalloc(sizeof (struct redirtab)); |
125 |
q->next = redirlist; |
q->next = redirlist; |
132 |
} |
} |
133 |
n = redir; |
n = redir; |
134 |
do { |
do { |
|
fd = n->nfile.fd; |
|
|
if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) && |
|
|
n->ndup.dupfd == fd) |
|
|
continue; /* redirect from/to same file descriptor */ |
|
|
|
|
135 |
newfd = openredirect(n); |
newfd = openredirect(n); |
136 |
if (fd == newfd) |
if (newfd < -1) |
137 |
continue; |
continue; |
138 |
if (sv && *(p = &sv->renamed[fd]) == EMPTY) { |
|
139 |
int i = fcntl(fd, F_DUPFD, 10); |
fd = n->nfile.fd; |
140 |
if (i == -1) { |
|
141 |
i = errno; |
if (sv) { |
142 |
if (i != EBADF) { |
p = &sv->renamed[fd]; |
143 |
const char *m = strerror(i); |
i = *p; |
144 |
close(newfd); |
|
145 |
sh_error("%d: %s", fd, m); |
if (likely(i == EMPTY)) { |
146 |
/* NOTREACHED */ |
i = CLOSED; |
147 |
|
if (fd != newfd) { |
148 |
|
i = savefd(fd); |
149 |
|
fd = -1; |
150 |
} |
} |
|
} else { |
|
|
*p = i; |
|
|
close(fd); |
|
151 |
} |
} |
152 |
} else { |
|
153 |
close(fd); |
if (i == newfd) |
154 |
|
/* Can only happen if i == newfd == CLOSED */ |
155 |
|
i = REALLY_CLOSED; |
156 |
|
|
157 |
|
*p = i; |
158 |
} |
} |
159 |
|
|
160 |
|
if (fd == newfd) |
161 |
|
continue; |
162 |
|
|
163 |
#ifdef notyet |
#ifdef notyet |
164 |
dupredirect(n, newfd, memory); |
dupredirect(n, newfd, memory); |
165 |
#else |
#else |
173 |
if (memory[2]) |
if (memory[2]) |
174 |
out2 = &memout; |
out2 = &memout; |
175 |
#endif |
#endif |
176 |
if (flags & REDIR_SAVEFD2 && sv && sv->renamed[2] >= 0) |
if (flags & REDIR_SAVEFD2 && sv->renamed[2] >= 0) |
177 |
preverrout.fd = sv->renamed[2]; |
preverrout.fd = sv->renamed[2]; |
178 |
} |
} |
179 |
|
|
214 |
if ((f = open64(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0) |
if ((f = open64(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0) |
215 |
goto ecreate; |
goto ecreate; |
216 |
break; |
break; |
217 |
|
case NTOFD: |
218 |
|
case NFROMFD: |
219 |
|
f = redir->ndup.dupfd; |
220 |
|
if (f == redir->nfile.fd) |
221 |
|
f = -2; |
222 |
|
break; |
223 |
default: |
default: |
224 |
#ifdef DEBUG |
#ifdef DEBUG |
225 |
abort(); |
abort(); |
226 |
#endif |
#endif |
227 |
/* Fall through to eliminate warning. */ |
/* Fall through to eliminate warning. */ |
|
case NTOFD: |
|
|
case NFROMFD: |
|
|
f = -1; |
|
|
break; |
|
228 |
case NHERE: |
case NHERE: |
229 |
case NXHERE: |
case NXHERE: |
230 |
f = openhere(redir); |
f = openhere(redir); |
252 |
#endif |
#endif |
253 |
{ |
{ |
254 |
int fd = redir->nfile.fd; |
int fd = redir->nfile.fd; |
255 |
|
int err = 0; |
256 |
|
|
257 |
#ifdef notyet |
#ifdef notyet |
258 |
memory[fd] = 0; |
memory[fd] = 0; |
259 |
#endif |
#endif |
260 |
if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) { |
if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) { |
261 |
if (redir->ndup.dupfd >= 0) { /* if not ">&-" */ |
/* if not ">&-" */ |
262 |
|
if (f >= 0) { |
263 |
#ifdef notyet |
#ifdef notyet |
264 |
if (memory[redir->ndup.dupfd]) |
if (memory[f]) |
265 |
memory[fd] = 1; |
memory[fd] = 1; |
266 |
else |
else |
267 |
#endif |
#endif |
268 |
copyfd(redir->ndup.dupfd, fd); |
if (dup2(f, fd) < 0) { |
269 |
|
err = errno; |
270 |
|
goto err; |
271 |
|
} |
272 |
|
return; |
273 |
} |
} |
274 |
return; |
f = fd; |
275 |
} |
} else if (dup2(f, fd) < 0) |
276 |
|
err = errno; |
277 |
|
|
278 |
|
close(f); |
279 |
|
if (err < 0) |
280 |
|
goto err; |
281 |
|
|
|
if (f != fd) { |
|
|
copyfd(f, fd); |
|
|
close(f); |
|
|
} |
|
282 |
return; |
return; |
283 |
|
|
284 |
|
err: |
285 |
|
sh_error("%d: %s", f, strerror(err)); |
286 |
} |
} |
287 |
|
|
288 |
|
|
344 |
INTOFF; |
INTOFF; |
345 |
rp = redirlist; |
rp = redirlist; |
346 |
for (i = 0 ; i < 10 ; i++) { |
for (i = 0 ; i < 10 ; i++) { |
347 |
if (rp->renamed[i] != EMPTY) { |
switch (rp->renamed[i]) { |
348 |
if (!drop) { |
case CLOSED: |
349 |
|
if (!drop) |
350 |
close(i); |
close(i); |
351 |
copyfd(rp->renamed[i], i); |
break; |
352 |
} |
case EMPTY: |
353 |
|
case REALLY_CLOSED: |
354 |
|
break; |
355 |
|
default: |
356 |
|
if (!drop) |
357 |
|
dup2(rp->renamed[i], i); |
358 |
close(rp->renamed[i]); |
close(rp->renamed[i]); |
359 |
|
break; |
360 |
} |
} |
361 |
} |
} |
362 |
redirlist = rp->next; |
redirlist = rp->next; |
374 |
INCLUDE "redir.h" |
INCLUDE "redir.h" |
375 |
|
|
376 |
RESET { |
RESET { |
377 |
clearredir(0); |
/* |
378 |
} |
* Discard all saved file descriptors. |
379 |
|
*/ |
|
#endif |
|
|
|
|
|
/* |
|
|
* Discard all saved file descriptors. |
|
|
*/ |
|
|
|
|
|
void |
|
|
clearredir(int drop) |
|
|
{ |
|
380 |
for (;;) { |
for (;;) { |
381 |
nullredirs = 0; |
nullredirs = 0; |
382 |
if (!redirlist) |
if (!redirlist) |
383 |
break; |
break; |
384 |
popredir(drop); |
popredir(0); |
385 |
} |
} |
386 |
} |
} |
387 |
|
|
388 |
|
#endif |
389 |
|
|
390 |
|
|
391 |
|
|
392 |
/* |
/* |
393 |
* Copy a file descriptor to be >= to. Returns -1 |
* Move a file descriptor to > 10. Invokes sh_error on error unless |
394 |
* if the source file descriptor is closed, EMPTY if there are no unused |
* the original file dscriptor is not open. |
|
* file descriptors left. |
|
395 |
*/ |
*/ |
396 |
|
|
397 |
int |
int |
398 |
copyfd(int from, int to) |
savefd(int from) |
399 |
{ |
{ |
400 |
int newfd; |
int newfd; |
401 |
|
int err; |
402 |
|
|
403 |
newfd = fcntl(from, F_DUPFD, to); |
newfd = fcntl(from, F_DUPFD, 10); |
404 |
if (newfd < 0) { |
err = newfd < 0 ? errno : 0; |
405 |
int errno2 = errno; |
if (err != EBADF) { |
406 |
if (errno2 == EMFILE) |
close(from); |
407 |
return EMPTY; |
if (err) |
408 |
|
sh_error("%d: %s", from, strerror(err)); |
409 |
else |
else |
410 |
sh_error("%d: %s", from, strerror(errno2)); |
fcntl(newfd, F_SETFD, FD_CLOEXEC); |
411 |
} |
} |
412 |
|
|
413 |
return newfd; |
return newfd; |
414 |
} |
} |
415 |
|
|