diff options
Diffstat (limited to '')
| -rw-r--r-- | src/input.c | 8 | ||||
| -rw-r--r-- | src/jobs.c | 14 | ||||
| -rw-r--r-- | src/redir.c | 65 | ||||
| -rw-r--r-- | src/redir.h | 2 |
4 files changed, 43 insertions, 46 deletions
diff --git a/src/input.c b/src/input.c index 49a2972..7f99d4a 100644 --- a/src/input.c +++ b/src/input.c @@ -428,7 +428,6 @@ int setinputfile(const char *fname, int flags) { int fd; - int fd2; INTOFF; if ((fd = open(fname, O_RDONLY)) < 0) { @@ -436,11 +435,8 @@ setinputfile(const char *fname, int flags) goto out; sh_error("Can't open %s", fname); } - if (fd < 10) { - fd2 = copyfd(fd, 10); - close(fd); - fd = fd2; - } + if (fd < 10) + fd = savefd(fd); setinputfd(fd, flags & INPUT_PUSH_FILE); out: INTON; diff --git a/src/jobs.c b/src/jobs.c index 9e28adb..7285d0d 100644 --- a/src/jobs.c +++ b/src/jobs.c @@ -188,18 +188,14 @@ setjobctl(int on) if (on == jobctl || rootshell == 0) return; if (on) { - int ofd; - ofd = fd = open(_PATH_TTY, O_RDWR); + fd = open(_PATH_TTY, O_RDWR); if (fd < 0) { fd += 3; - while (!isatty(fd) && --fd >= 0) - ; + while (!isatty(fd)) + if (--fd < 0) + goto out; } - fd = fcntl(fd, F_DUPFD, 10); - close(ofd); - if (fd < 0) - goto out; - fcntl(fd, F_SETFD, FD_CLOEXEC); + fd = savefd(fd); do { /* while we are in the background */ if ((pgrp = tcgetpgrp(fd)) < 0) { out: diff --git a/src/redir.c b/src/redir.c index aab1585..9e0fae5 100644 --- a/src/redir.c +++ b/src/redir.c @@ -138,21 +138,10 @@ redirect(union node *redir, int flags) if (fd == newfd) continue; if (sv && *(p = &sv->renamed[fd]) == EMPTY) { - int i = fcntl(fd, F_DUPFD, 10); - if (i == -1) { - i = errno; - if (i != EBADF) { - const char *m = strerror(i); - close(newfd); - sh_error("%d: %s", fd, m); - /* NOTREACHED */ - } - } else { + int i = savefd(fd); + + if (i >= 0) *p = i; - close(fd); - } - } else { - close(fd); } #ifdef notyet dupredirect(n, newfd, memory); @@ -244,6 +233,7 @@ dupredirect(redir, f) #endif { int fd = redir->nfile.fd; + int err = 0; #ifdef notyet memory[fd] = 0; @@ -255,16 +245,24 @@ dupredirect(redir, f) memory[fd] = 1; else #endif - copyfd(redir->ndup.dupfd, fd); + if (dup2(f, fd) < 0) { + err = errno; + goto err; + } + return; } - return; - } + f = fd; + } else if (dup2(f, fd) < 0) + err = errno; + + close(f); + if (err < 0) + goto err; - if (f != fd) { - copyfd(f, fd); - close(f); - } return; + +err: + sh_error("%d: %s", f, strerror(err)); } @@ -327,10 +325,8 @@ popredir(int drop) rp = redirlist; for (i = 0 ; i < 10 ; i++) { if (rp->renamed[i] != EMPTY) { - if (!drop) { - close(i); - copyfd(rp->renamed[i], i); - } + if (!drop) + dup2(rp->renamed[i], i); close(rp->renamed[i]); } } @@ -372,17 +368,26 @@ clearredir(int drop) /* - * Copy a file descriptor to be >= to. Invokes sh_error on error. + * Move a file descriptor to > 10. Invokes sh_error on error unless + * the original file dscriptor is not open. */ int -copyfd(int from, int to) +savefd(int from) { int newfd; + int err; + + newfd = fcntl(from, F_DUPFD, 10); + err = newfd < 0 ? errno : 0; + if (err != EBADF) { + close(from); + if (err) + sh_error("%d: %s", from, strerror(err)); + else + fcntl(newfd, F_SETFD, FD_CLOEXEC); + } - newfd = fcntl(from, F_DUPFD, to); - if (newfd < 0) - sh_error("%d: %s", from, strerror(errno)); return newfd; } diff --git a/src/redir.h b/src/redir.h index f4347ce..2c43511 100644 --- a/src/redir.h +++ b/src/redir.h @@ -45,6 +45,6 @@ union node; void redirect(union node *, int); void popredir(int); void clearredir(int); -int copyfd(int, int); +int savefd(int); int redirectsafe(union node *, int); |