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LD_ISCSI add pwite

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This commit is contained in:
Peter Lieven
2012-11-03 18:12:39 +01:00
parent 0639c7e9ab
commit e1bb8e1ed1
1 changed files with 20 additions and 0 deletions
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20
src/ld_iscsi.c
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@@ -488,6 +488,26 @@ ssize_t write(int fd, const void *buf, size_t count)
return real_write(fd, buf, count);
}
ssize_t (*real_pwrite)(int fd, const void *buf, size_t count, off_t offset);
ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset) {
if ((iscsi_fd_list[fd].is_iscsi == 1 && iscsi_fd_list[fd].in_flight == 0)) {
off_t old_offset;
if ((old_offset = lseek(fd, 0, SEEK_CUR)) < 0) {
errno = EIO;
return -1;
}
if (lseek(fd, offset, SEEK_SET) < 0) {
return -1;
}
if (write(fd, buf, count) < 0) {
lseek(fd, old_offset, SEEK_SET);
return -1;
}
lseek(fd, old_offset, SEEK_SET);
return count;
}
return real_pwrite(fd, buf, count, offset);
}
int (*real_dup2)(int oldfd, int newfd);