diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/getopt.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/include/getopt.h b/src/include/getopt.h index 8bf0d3317..2505223ed 100644 --- a/src/include/getopt.h +++ b/src/include/getopt.h @@ -49,9 +49,9 @@ struct option { extern char *optarg; extern int optind; +extern int nextchar; extern int optopt; -extern void reset_getopt(); extern int getopt_long ( int argc, char * const argv[], const char *optstring, const struct option *longopts, int *longindex ); @@ -73,4 +73,20 @@ static inline int getopt ( int argc, char * const argv[], return getopt_long ( argc, argv, optstring, no_options, NULL ); } +/** + * Reset getopt() internal state + * + * Due to a limitation of the POSIX getopt() API, it is necessary to + * add a call to reset_getopt() before each set of calls to getopt() + * or getopt_long(). This arises because POSIX assumes that each + * process will parse command line arguments no more than once; this + * assumption is not valid within Etherboot. We work around the + * limitation by arranging for execv() to call reset_getopt() before + * executing the command. + */ +static inline void reset_getopt ( void ) { + optind = 1; + nextchar = 0; +} + #endif /* _GETOPT_H */ |