diff options
Diffstat (limited to 'gdb/inf-child.c')
| -rw-r--r-- | gdb/inf-child.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/gdb/inf-child.c b/gdb/inf-child.c index 0dda331..2271824 100644 --- a/gdb/inf-child.c +++ b/gdb/inf-child.c @@ -29,6 +29,9 @@ #include "inf-child.h" #include "gdb/fileio.h" +#ifdef HAVE_SYS_PARAM_H +#include <sys/param.h> /* for MAXPATHLEN */ +#endif #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> @@ -299,6 +302,36 @@ inf_child_fileio_unlink (const char *filename, int *target_errno) return ret; } +/* Read value of symbolic link FILENAME on the target. Return a + null-terminated string allocated via xmalloc, or NULL if an error + occurs (and set *TARGET_ERRNO). */ +static char * +inf_child_fileio_readlink (const char *filename, int *target_errno) +{ + /* We support readlink only on systems that also provide a compile-time + maximum path length (MAXPATHLEN), at least for now. */ +#if defined (HAVE_READLINK) && defined (MAXPATHLEN) + char buf[MAXPATHLEN]; + int len; + char *ret; + + len = readlink (filename, buf, sizeof buf); + if (len < 0) + { + *target_errno = inf_child_errno_to_fileio_error (errno); + return NULL; + } + + ret = xmalloc (len + 1); + memcpy (ret, buf, len); + ret[len] = '\0'; + return ret; +#else + *target_errno = FILEIO_ENOSYS; + return NULL; +#endif +} + struct target_ops * inf_child_target (void) @@ -336,6 +369,7 @@ inf_child_target (void) t->to_fileio_pread = inf_child_fileio_pread; t->to_fileio_close = inf_child_fileio_close; t->to_fileio_unlink = inf_child_fileio_unlink; + t->to_fileio_readlink = inf_child_fileio_readlink; t->to_magic = OPS_MAGIC; return t; } |