/* Open a gcov file. NAME is the name of the file to open and MODE
indicates whether a new file should be created, or an existing file
- opened for modification. If MODE is >= 0 an existing file will be
- opened, if possible, and if MODE is <= 0, a new file will be
- created. Use MODE=0 to attempt to reopen an existing file and then
- fall back on creating a new one. Return zero on failure, >0 on
- opening an existing file and <0 on creating a new one. */
+ opened. If MODE is >= 0 an existing file will be opened, if
+ possible, and if MODE is <= 0, a new file will be created. Use
+ MODE=0 to attempt to reopen an existing file and then fall back on
+ creating a new one. If MODE < 0, the file will be opened in
+ read-only mode. Otherwise it will be opened for modification.
+ Return zero on failure, >0 on opening an existing file and <0 on
+ creating a new one. */
GCOV_LINKAGE int
#if IN_LIBGCOV
struct flock s_flock;
int fd;
- s_flock.l_type = F_WRLCK;
s_flock.l_whence = SEEK_SET;
s_flock.l_start = 0;
s_flock.l_len = 0; /* Until EOF. */
#endif
#if GCOV_LOCKED
if (mode > 0)
- fd = open (name, O_RDWR);
+ {
+ /* Read-only mode - acquire a read-lock. */
+ s_flock.l_type = F_RDLCK;
+ fd = open (name, O_RDONLY);
+ }
else
- fd = open (name, O_RDWR | O_CREAT, 0666);
+ {
+ /* Write mode - acquire a write-lock. */
+ s_flock.l_type = F_WRLCK;
+ fd = open (name, O_RDWR | O_CREAT, 0666);
+ }
if (fd < 0)
return 0;
while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR)
continue;
- gcov_var.file = fdopen (fd, "r+b");
+ gcov_var.file = fdopen (fd, (mode > 0) ? "rb" : "r+b");
+
if (!gcov_var.file)
{
close (fd);
gcov_var.mode = mode * 2 + 1;
#else
if (mode >= 0)
- gcov_var.file = fopen (name, "r+b");
+ gcov_var.file = fopen (name, (mode > 0) ? "rb" : "r+b");
+
if (gcov_var.file)
gcov_var.mode = 1;
else if (mode <= 0)
new_size *= 2;
gcov_var.alloc = new_size;
- gcov_var.buffer = xrealloc (gcov_var.buffer, new_size << 2);
+ gcov_var.buffer = XRESIZEVAR (gcov_unsigned_t, gcov_var.buffer, new_size << 2);
}
#endif