1 | /*- |
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2 | * Copyright (c) 1990, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #if defined(LIBC_SCCS) && !defined(lint) |
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35 | static char sccsid[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93"; |
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36 | #endif /* LIBC_SCCS and not lint */ |
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37 | #include <sys/cdefs.h> |
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38 | |
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39 | #include <unistd.h> |
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40 | #include <stdlib.h> |
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41 | #include <string.h> |
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42 | |
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43 | /* |
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44 | * The SVID interface to getsubopt provides no way of figuring out which |
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45 | * part of the suboptions list wasn't matched. This makes error messages |
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46 | * tricky... The extern variable suboptarg is a pointer to the token |
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47 | * which didn't match. |
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48 | */ |
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49 | char *suboptarg; |
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50 | |
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51 | int |
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52 | getsubopt(optionp, tokens, valuep) |
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53 | char **optionp, **valuep; |
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54 | char * const *tokens; |
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55 | { |
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56 | int cnt; |
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57 | char *p; |
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58 | |
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59 | suboptarg = *valuep = NULL; |
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60 | |
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61 | if (!optionp || !*optionp) |
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62 | return(-1); |
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63 | |
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64 | /* skip leading white-space, commas */ |
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65 | for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); |
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66 | |
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67 | if (!*p) { |
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68 | *optionp = p; |
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69 | return(-1); |
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70 | } |
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71 | |
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72 | /* save the start of the token, and skip the rest of the token. */ |
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73 | for (suboptarg = p; |
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74 | *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';); |
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75 | |
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76 | if (*p) { |
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77 | /* |
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78 | * If there's an equals sign, set the value pointer, and |
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79 | * skip over the value part of the token. Terminate the |
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80 | * token. |
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81 | */ |
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82 | if (*p == '=') { |
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83 | *p = '\0'; |
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84 | for (*valuep = ++p; |
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85 | *p && *p != ',' && *p != ' ' && *p != '\t'; ++p); |
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86 | if (*p) |
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87 | *p++ = '\0'; |
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88 | } else |
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89 | *p++ = '\0'; |
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90 | /* Skip any whitespace or commas after this token. */ |
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91 | for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); |
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92 | } |
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93 | |
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94 | /* set optionp for next round. */ |
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95 | *optionp = p; |
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96 | |
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97 | for (cnt = 0; *tokens; ++tokens, ++cnt) |
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98 | if (!strcmp(suboptarg, *tokens)) |
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99 | return(cnt); |
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100 | return(-1); |
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101 | } |
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