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Merge remote-tracking branch 'mdroth/qga-pull-2013-05-13' into staging

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* mdroth/qga-pull-2013-05-13:
  qga: unlink just created guest-file if fchmod() or fdopen() fails on it
  qga: distinguish binary modes in "guest_file_open_modes" map

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2013-05-17 10:00:30 -05:00
parent 77417f1070 2b72001806
commit ce4cc31695
1 changed files with 19 additions and 6 deletions
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25
qga/commands-posix.c
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@ -242,17 +242,27 @@ static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err)
typedef const char * const ccpc;
#ifndef O_BINARY
#define O_BINARY 0
#endif
/* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
static const struct {
ccpc *forms;
int oflag_base;
} guest_file_open_modes[] = {
{ (ccpc[]){ "r", "rb", NULL }, O_RDONLY },
{ (ccpc[]){ "w", "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
{ (ccpc[]){ "a", "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND },
{ (ccpc[]){ "r+", "rb+", "r+b", NULL }, O_RDWR },
{ (ccpc[]){ "w+", "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC },
{ (ccpc[]){ "a+", "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND }
{ (ccpc[]){ "r", NULL }, O_RDONLY },
{ (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
{ (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
{ (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
{ (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
{ (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
{ (ccpc[]){ "r+", NULL }, O_RDWR },
{ (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
{ (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
{ (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
{ (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
{ (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
};
static int
@ -345,6 +355,9 @@ safe_open_or_create(const char *path, const char *mode, Error **err)
}
close(fd);
if (oflag & O_CREAT) {
unlink(path);
}
}
}