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author | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-12 20:21:34 +0200 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-12 20:21:34 +0200 |
commit | 352ddd3d216131757ac278e97a09ce2f4d7f53f0 (patch) | |
tree | 6ed924aee0419bc872809811dd7462941ca21c50 | |
parent | 835ad3a984c5590ae4f6c94f2f0781ea049d1ae8 (diff) | |
download | busybox-w32-352ddd3d216131757ac278e97a09ce2f4d7f53f0.tar.gz busybox-w32-352ddd3d216131757ac278e97a09ce2f4d7f53f0.tar.bz2 busybox-w32-352ddd3d216131757ac278e97a09ce2f4d7f53f0.zip |
Tweak GETOPT_RESET comment
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r-- | include/libbb.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/include/libbb.h b/include/libbb.h index 11d022fb5..777a4a884 100644 --- a/include/libbb.h +++ b/include/libbb.h | |||
@@ -1176,19 +1176,17 @@ extern const char *applet_long_options; | |||
1176 | #endif | 1176 | #endif |
1177 | extern uint32_t option_mask32; | 1177 | extern uint32_t option_mask32; |
1178 | extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC; | 1178 | extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC; |
1179 | |||
1180 | |||
1181 | /* BSD-derived getopt() functions require that optind be set to 1 in | 1179 | /* BSD-derived getopt() functions require that optind be set to 1 in |
1182 | * order to reset getopt() state. This used to be generally accepted | 1180 | * order to reset getopt() state. This used to be generally accepted |
1183 | * way of resetting getopt(). However, glibc's getopt() | 1181 | * way of resetting getopt(). However, glibc's getopt() |
1184 | * has additional getopt() state beyond optind (specifically, glibc | 1182 | * has additional getopt() state beyond optind (specifically, glibc |
1185 | * extensions ('+' and '-' at the start of the string), and requires | 1183 | * extensions such as '+' and '-' at the start of the string), and requires |
1186 | * that optind be set to zero to reset its state. BSD-derived versions | 1184 | * that optind be set to zero to reset its state. BSD-derived versions |
1187 | * of getopt() misbehaved if optind is set to 0 in order to reset getopt(), | 1185 | * of getopt() misbehaved if optind is set to 0 in order to reset getopt(), |
1188 | * and glibc's getopt() used to coredump if optind is set 1 in order | 1186 | * and glibc's getopt() used to coredump if optind is set 1 in order |
1189 | * to reset getopt(). | 1187 | * to reset getopt(). |
1190 | * Then BSD introduced additional variable "optreset" which | 1188 | * Then BSD introduced additional variable "optreset" which should be |
1191 | * be set to 1 in order to reset getopt(). Sigh. Standards, anyone? | 1189 | * set to 1 in order to reset getopt(). Sigh. Standards, anyone? |
1192 | * | 1190 | * |
1193 | * By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0 | 1191 | * By ~2008, OpenBSD 3.4 was changed to survive glibc-like optind = 0 |
1194 | * (to interpret it as if optreset was set). | 1192 | * (to interpret it as if optreset was set). |