diff options
| -rw-r--r-- | libc/unistd/Makefile | 2 | ||||
| -rw-r--r-- | libc/unistd/getsubopt.c | 72 |
2 files changed, 73 insertions, 1 deletions
diff --git a/libc/unistd/Makefile b/libc/unistd/Makefile index f9e090f19..11a33cecf 100644 --- a/libc/unistd/Makefile +++ b/libc/unistd/Makefile @@ -28,7 +28,7 @@ DIRS:= CSRC=execl.c execlp.c execv.c execvep.c execvp.c execle.c \ sleep.c usleep.c getpass.c sysconf_src.c getlogin.c \ fpathconf.c confstr.c pathconf.c swab.c usershell.c \ - getopt.c + getopt.c getsubopt.c ifeq ($(strip $(HAS_MMU)),true) CSRC+=daemon.c endif diff --git a/libc/unistd/getsubopt.c b/libc/unistd/getsubopt.c new file mode 100644 index 000000000..682eb4bc4 --- /dev/null +++ b/libc/unistd/getsubopt.c @@ -0,0 +1,72 @@ +/* Parse comma separate list into words. + Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <stdlib.h> +#include <string.h> + +extern char *__strchrnul(const char *s, int c); + +/* Parse comma separated suboption from *OPTIONP and match against + strings in TOKENS. If found return index and set *VALUEP to + optional value introduced by an equal sign. If the suboption is + not part of TOKENS return in *VALUEP beginning of unknown + suboption. On exit *OPTIONP is set to the beginning of the next + token or at the terminating NUL character. */ +int getsubopt(char **optionp, char *const *tokens, char **valuep) +{ + char *endp, *vstart; + int cnt; + + if (**optionp == '\0') + return -1; + + /* Find end of next token. */ + endp = __strchrnul (*optionp, ','); + + /* Find start of value. */ + vstart = memchr (*optionp, '=', endp - *optionp); + if (vstart == NULL) + vstart = endp; + + /* Try to match the characters between *OPTIONP and VSTART against + one of the TOKENS. */ + for (cnt = 0; tokens[cnt] != NULL; ++cnt) + if (memcmp (*optionp, tokens[cnt], vstart - *optionp) == 0 + && tokens[cnt][vstart - *optionp] == '\0') + { + /* We found the current option in TOKENS. */ + *valuep = vstart != endp ? vstart + 1 : NULL; + + if (*endp != '\0') + *endp++ = '\0'; + *optionp = endp; + + return cnt; + } + + /* The current suboption does not match any option. */ + *valuep = *optionp; + + if (*endp != '\0') + *endp++ = '\0'; + *optionp = endp; + + return -1; +} |