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Tweak GETOPT_RESET comment

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-04-12 20:21:34 +02:00
parent 835ad3a984
commit 352ddd3d21
1 changed files with 3 additions and 5 deletions
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8
include/libbb.h
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@@ -1176,19 +1176,17 @@ extern const char *applet_long_options;
#endif #endif
extern uint32_t option_mask32; extern uint32_t option_mask32;
extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC; extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
/* BSD-derived getopt() functions require that optind be set to 1 in /* BSD-derived getopt() functions require that optind be set to 1 in
* order to reset getopt() state. This used to be generally accepted * order to reset getopt() state. This used to be generally accepted
* way of resetting getopt(). However, glibc's getopt() * way of resetting getopt(). However, glibc's getopt()
* has additional getopt() state beyond optind (specifically, glibc * has additional getopt() state beyond optind (specifically, glibc
* extensions ('+' and '-' at the start of the string), and requires * extensions such as '+' and '-' at the start of the string), and requires
* that optind be set to zero to reset its state. BSD-derived versions * that optind be set to zero to reset its state. BSD-derived versions
* of getopt() misbehaved if optind is set to 0 in order to reset getopt(), * of getopt() misbehaved if optind is set to 0 in order to reset getopt(),
* and glibc's getopt() used to coredump if optind is set 1 in order * and glibc's getopt() used to coredump if optind is set 1 in order
* to reset getopt(). * to reset getopt().
* Then BSD introduced additional variable "optreset" which * Then BSD introduced additional variable "optreset" which should be
* be set to 1 in order to reset getopt(). Sigh. Standards, anyone? * set to 1 in order to reset getopt(). Sigh. Standards, anyone?
* *
* By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0 * By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0
* (to interpret it as if optreset was set). * (to interpret it as if optreset was set).