diff options
Diffstat (limited to 'lib/libc/stdlib')
| -rw-r--r-- | lib/libc/stdlib/Makefile.inc | 12 | ||||
| -rw-r--r-- | lib/libc/stdlib/getsubopt.3 | 147 | ||||
| -rw-r--r-- | lib/libc/stdlib/getsubopt.c | 106 |
3 files changed, 259 insertions, 6 deletions
diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc index fe343587f90..e75fc0d8bf1 100644 --- a/lib/libc/stdlib/Makefile.inc +++ b/lib/libc/stdlib/Makefile.inc @@ -4,10 +4,10 @@ .PATH: ${.CURDIR}/arch/${MACHINE_ARCH}/stdlib ${.CURDIR}/stdlib SRCS+= a64l.c abort.c atexit.c atoi.c atof.c atol.c bsearch.c calloc.c \ - cfree.c exit.c getenv.c getopt.c heapsort.c l64a.c malloc.c merge.c \ - multibyte.c putenv.c qsort.c radixsort.c rand.c random.c realpath.c \ - setenv.c strtod.c strtol.c strtoq.c strtoul.c strtouq.c system.c \ - tfind.c tsearch.c \ + cfree.c exit.c getenv.c getopt.c getsubopt.c heapsort.c l64a.c \ + malloc.c merge.c multibyte.c putenv.c qsort.c radixsort.c rand.c \ + random.c realpath.c setenv.c strtod.c strtol.c strtoq.c strtoul.c \ + strtouq.c system.c tfind.c tsearch.c \ _rand48.c drand48.c erand48.c jrand48.c lcong48.c lrand48.c \ mrand48.c nrand48.c seed48.c srand48.c qabs.c qdiv.c @@ -33,8 +33,8 @@ SRCS+= abs.c div.c labs.c ldiv.c .endif MAN+= a64l.3 abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 bsearch.3 \ - calloc.3 div.3 exit.3 getenv.3 getopt.3 labs.3 ldiv.3 malloc.3 \ - memory.3 qabs.3 qdiv.3 qsort.3 radixsort.3 rand48.3 rand.3 \ + calloc.3 div.3 exit.3 getenv.3 getopt.3 getsubopt.3 labs.3 ldiv.3 \ + malloc.3 memory.3 qabs.3 qdiv.3 qsort.3 radixsort.3 rand48.3 rand.3 \ random.3 realpath.3 strtod.3 strtol.3 strtoul.3 system.3 tsearch.3 MLINKS+=getenv.3 setenv.3 getenv.3 unsetenv.3 getenv.3 putenv.3 diff --git a/lib/libc/stdlib/getsubopt.3 b/lib/libc/stdlib/getsubopt.3 new file mode 100644 index 00000000000..06e089203f1 --- /dev/null +++ b/lib/libc/stdlib/getsubopt.3 @@ -0,0 +1,147 @@ +.\" $OpenBSD: getsubopt.3,v 1.1 1997/08/20 04:02:17 millert Exp $ +.\" +.\" Copyright (c) 1990, 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)getsubopt.3 8.1 (Berkeley) 6/9/93 +.\" +.Dd June 9, 1993 +.Dt GETSUBOPT 3 +.Os +.Sh NAME +.Nm getsubopt +.Nd get sub options from an argument +.Sh SYNOPSIS +.Fd #include <stdlib.h> +.Vt extern char *suboptarg +.Ft int +.Fn getsubopt "char **optionp" "char * const *tokens" "char **valuep" +.Sh DESCRIPTION +The +.Fn getsubopt +function +parses a string containing tokens delimited by one or more tab, space or +comma +.Pq Ql \&, +characters. +It is intended for use in parsing groups of option arguments provided +as part of a utility command line. +.Pp +The argument +.Fa optionp +is a pointer to a pointer to the string. +The argument +.Fa tokens +is a pointer to a +.Dv NULL Ns -terminated +array of pointers to strings. +.Pp +The +.Fn getsubopt +function +returns the zero-based offset of the pointer in the +.Fa tokens +array referencing a string which matches the first token +in the string, or, \-1 if the string contains no tokens or +.Fa tokens +does not contain a matching string. +.Pp +If the token is of the form ``name=value'', the location referenced by +.Fa valuep +will be set to point to the start of the ``value'' portion of the token. +.Pp +On return from +.Fn getsubopt , +.Fa optionp +will be set to point to the start of the next token in the string, +or the null at the end of the string if no more tokens are present. +The external variable +.Fa suboptarg +will be set to point to the start of the current token, or +.Dv NULL +if no +tokens were present. +The argument +.Fa valuep +will be set to point to the ``value'' portion of the token, or +.Dv NULL +if no ``value'' portion was present. +.Sh EXAMPLE +.Bd -literal -compact +char *tokens[] = { + #define ONE 0 + "one", + #define TWO 1 + "two", + NULL +}; + +\&... + +extern char *optarg, *suboptarg; +char *options, *value; + +while ((ch = getopt(argc, argv, "ab:")) != \-1) { + switch(ch) { + case 'a': + /* process ``a'' option */ + break; + case 'b': + options = optarg; + while (*options) { + switch(getsubopt(&options, tokens, &value)) { + case ONE: + /* process ``one'' sub option */ + break; + case TWO: + /* process ``two'' sub option */ + if (!value) + error("no value for two"); + i = atoi(value); + break; + case \-1: + if (suboptarg) + error("illegal sub option %s", + suboptarg); + else + error("missing sub option"); + break; + } + break; + } +.Ed +.Sh SEE ALSO +.Xr getopt 3 , +.Xr strsep 3 +.Sh HISTORY +The +.Fn getsubopt +function first appeared in 4.4BSD. diff --git a/lib/libc/stdlib/getsubopt.c b/lib/libc/stdlib/getsubopt.c new file mode 100644 index 00000000000..1667a31d7da --- /dev/null +++ b/lib/libc/stdlib/getsubopt.c @@ -0,0 +1,106 @@ +/* $OpenBSD: getsubopt.c,v 1.1 1997/08/20 04:02:17 millert Exp $ */ + +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93"; +#else +static char rcsid[] = "$OpenBSD: getsubopt.c,v 1.1 1997/08/20 04:02:17 millert Exp $"; +#endif +#endif /* not lint */ + +#include <unistd.h> +#include <stdlib.h> +#include <string.h> + +/* + * The SVID interface to getsubopt provides no way of figuring out which + * part of the suboptions list wasn't matched. This makes error messages + * tricky... The extern variable suboptarg is a pointer to the token + * which didn't match. + */ +char *suboptarg; + +int +getsubopt(optionp, tokens, valuep) + register char **optionp, **valuep; + register char * const *tokens; +{ + register int cnt; + register char *p; + + suboptarg = *valuep = NULL; + + if (!optionp || !*optionp) + return(-1); + + /* skip leading white-space, commas */ + for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); + + if (!*p) { + *optionp = p; + return(-1); + } + + /* save the start of the token, and skip the rest of the token. */ + for (suboptarg = p; + *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';); + + if (*p) { + /* + * If there's an equals sign, set the value pointer, and + * skip over the value part of the token. Terminate the + * token. + */ + if (*p == '=') { + *p = '\0'; + for (*valuep = ++p; + *p && *p != ',' && *p != ' ' && *p != '\t'; ++p); + if (*p) + *p++ = '\0'; + } else + *p++ = '\0'; + /* Skip any whitespace or commas after this token. */ + for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); + } + + /* set optionp for next round. */ + *optionp = p; + + for (cnt = 0; *tokens; ++tokens, ++cnt) + if (!strcmp(suboptarg, *tokens)) + return(cnt); + return(-1); +} |