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Stricter error checking in the I/O functions.

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This commit is contained in:
Dag-Erling Smørgrav 2000-10-29 15:52:05 +00:00
parent 5aeeaeba90
commit 23109751fd
1 changed files with 25 additions and 1 deletions
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26
lib/libfetch/ftp.c
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@ -82,6 +82,7 @@
#define FTP_OK 200
#define FTP_FILE_STATUS 213
#define FTP_SERVICE_READY 220
#define FTP_TRANSFER_COMPLETE 226
#define FTP_PASSIVE_MODE 227
#define FTP_LPASSIVE_MODE 228
#define FTP_EPASSIVE_MODE 229
@ -327,6 +328,10 @@ _ftp_readfn(void *v, char *buf, int len)
int r;
io = (struct ftpio *)v;
if (io == NULL) {
errno = EBADF;
return -1;
}
if (io->csd == -1 || io->dsd == -1 || io->dir == O_WRONLY) {
errno = EBADF;
return -1;
@ -355,6 +360,10 @@ _ftp_writefn(void *v, const char *buf, int len)
int w;
io = (struct ftpio *)v;
if (io == NULL) {
errno = EBADF;
return -1;
}
if (io->csd == -1 || io->dsd == -1 || io->dir == O_RDONLY) {
errno = EBADF;
return -1;
@ -373,6 +382,13 @@ _ftp_writefn(void *v, const char *buf, int len)
static fpos_t
_ftp_seekfn(void *v, fpos_t pos, int whence)
{
struct ftpio *io;
io = (struct ftpio *)v;
if (io == NULL) {
errno = EBADF;
return -1;
}
errno = ESPIPE;
return -1;
}
@ -381,8 +397,13 @@ static int
_ftp_closefn(void *v)
{
struct ftpio *io;
int r;
io = (struct ftpio *)v;
if (io == NULL) {
errno = EBADF;
return -1;
}
if (io->dir == -1)
return 0;
if (io->csd == -1 || io->dsd == -1) {
@ -393,7 +414,10 @@ _ftp_closefn(void *v)
io->dir = -1;
io->dsd = -1;
DEBUG(fprintf(stderr, "Waiting for final status\n"));
io->err = _ftp_chkerr(io->csd);
if ((r = _ftp_chkerr(io->csd)) != FTP_TRANSFER_COMPLETE)
io->err = r;
else
io->err = 0;
close(io->csd);
io->csd = -1;
return io->err ? -1 : 0;