| 1 | /* |
| 2 | * This file contains the ini and command liner parser main. |
| 3 | */ |
| 4 | #include <stdio.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <unistd.h> |
| 7 | #include <ctype.h> |
| 8 | #include <string.h> |
| 9 | #include <errno.h> |
| 10 | #include <limits.h> |
| 11 | |
| 12 | #include "parse.h" |
| 13 | |
| 14 | static unsigned long get_mult_time(char c) |
| 15 | { |
| 16 | switch (c) { |
| 17 | case 'm': |
| 18 | case 'M': |
| 19 | return 60; |
| 20 | case 'h': |
| 21 | case 'H': |
| 22 | return 60 * 60; |
| 23 | case 'd': |
| 24 | case 'D': |
| 25 | return 24 * 60 * 60; |
| 26 | default: |
| 27 | return 1; |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | static unsigned long get_mult_bytes(char c) |
| 32 | { |
| 33 | switch (c) { |
| 34 | case 'k': |
| 35 | case 'K': |
| 36 | return 1024; |
| 37 | case 'm': |
| 38 | case 'M': |
| 39 | return 1024 * 1024; |
| 40 | case 'g': |
| 41 | case 'G': |
| 42 | return 1024 * 1024 * 1024; |
| 43 | default: |
| 44 | return 1; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * convert string after '=' into decimal value, noting any size suffix |
| 50 | */ |
| 51 | static int str_to_decimal(char *p, unsigned long long *val, int kilo) |
| 52 | { |
| 53 | char *str; |
| 54 | int len; |
| 55 | |
| 56 | str = strchr(p, '='); |
| 57 | if (!str) |
| 58 | return 1; |
| 59 | |
| 60 | str++; |
| 61 | len = strlen(str); |
| 62 | |
| 63 | *val = strtoul(str, NULL, 10); |
| 64 | if (*val == ULONG_MAX && errno == ERANGE) |
| 65 | return 1; |
| 66 | |
| 67 | if (kilo) |
| 68 | *val *= get_mult_bytes(str[len - 1]); |
| 69 | else |
| 70 | *val *= get_mult_time(str[len - 1]); |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | int check_str_bytes(char *p, char *name, unsigned long long *val) |
| 75 | { |
| 76 | if (strncmp(p, name, strlen(name) - 1)) |
| 77 | return 1; |
| 78 | |
| 79 | return str_to_decimal(p, val, 1); |
| 80 | } |
| 81 | |
| 82 | int check_str_time(char *p, char *name, unsigned long long *val) |
| 83 | { |
| 84 | if (strncmp(p, name, strlen(name) - 1)) |
| 85 | return 1; |
| 86 | |
| 87 | return str_to_decimal(p, val, 0); |
| 88 | } |
| 89 | |
| 90 | void strip_blank_front(char **p) |
| 91 | { |
| 92 | char *s = *p; |
| 93 | |
| 94 | while (isspace(*s)) |
| 95 | s++; |
| 96 | } |
| 97 | |
| 98 | void strip_blank_end(char *p) |
| 99 | { |
| 100 | char *s = p + strlen(p) - 1; |
| 101 | |
| 102 | while (isspace(*s) || iscntrl(*s)) |
| 103 | s--; |
| 104 | |
| 105 | *(s + 1) = '\0'; |
| 106 | } |
| 107 | |
| 108 | int check_str(char *p, char *name, str_cb_fn *cb, void *data) |
| 109 | { |
| 110 | char *s; |
| 111 | |
| 112 | if (strncmp(p, name, strlen(name))) |
| 113 | return 1; |
| 114 | |
| 115 | s = strstr(p, name); |
| 116 | if (!s) |
| 117 | return 1; |
| 118 | |
| 119 | s = strchr(s, '='); |
| 120 | if (!s) |
| 121 | return 1; |
| 122 | |
| 123 | s++; |
| 124 | strip_blank_front(&s); |
| 125 | return cb(data, s); |
| 126 | } |
| 127 | |
| 128 | int check_strstore(char *p, char *name, char *dest) |
| 129 | { |
| 130 | char *s; |
| 131 | |
| 132 | if (strncmp(p, name, strlen(name))) |
| 133 | return 1; |
| 134 | |
| 135 | s = strstr(p, name); |
| 136 | if (!s) |
| 137 | return 1; |
| 138 | |
| 139 | s = strchr(p, '='); |
| 140 | if (!s) |
| 141 | return 1; |
| 142 | |
| 143 | s++; |
| 144 | strip_blank_front(&s); |
| 145 | |
| 146 | strcpy(dest, s); |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | static int __check_range_bytes(char *str, unsigned long *val) |
| 151 | { |
| 152 | char suffix; |
| 153 | |
| 154 | if (sscanf(str, "%lu%c", val, &suffix) == 2) { |
| 155 | *val *= get_mult_bytes(suffix); |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | if (sscanf(str, "%lu", val) == 1) |
| 160 | return 0; |
| 161 | |
| 162 | return 1; |
| 163 | } |
| 164 | |
| 165 | int check_range_bytes(char *p, char *name, unsigned long *s, unsigned long *e) |
| 166 | { |
| 167 | char option[128]; |
| 168 | char *str, *p1, *p2; |
| 169 | |
| 170 | if (strncmp(p, name, strlen(name))) |
| 171 | return 1; |
| 172 | |
| 173 | strcpy(option, p); |
| 174 | p = option; |
| 175 | |
| 176 | str = strstr(p, name); |
| 177 | if (!str) |
| 178 | return 1; |
| 179 | |
| 180 | p += strlen(name); |
| 181 | |
| 182 | str = strchr(p, '='); |
| 183 | if (!str) |
| 184 | return 1; |
| 185 | |
| 186 | /* |
| 187 | * 'p' now holds whatever is after the '=' sign |
| 188 | */ |
| 189 | p1 = str + 1; |
| 190 | |
| 191 | /* |
| 192 | * terminate p1 at the '-' sign |
| 193 | */ |
| 194 | p = strchr(p1, '-'); |
| 195 | if (!p) |
| 196 | return 1; |
| 197 | |
| 198 | p2 = p + 1; |
| 199 | *p = '\0'; |
| 200 | |
| 201 | if (!__check_range_bytes(p1, s) && !__check_range_bytes(p2, e)) |
| 202 | return 0; |
| 203 | |
| 204 | return 1; |
| 205 | } |
| 206 | |
| 207 | int check_int(char *p, char *name, unsigned int *val) |
| 208 | { |
| 209 | char *str; |
| 210 | |
| 211 | if (strncmp(p, name, strlen(name))) |
| 212 | return 1; |
| 213 | |
| 214 | str = strstr(p, name); |
| 215 | if (!str) |
| 216 | return 1; |
| 217 | |
| 218 | str = strchr(p, '='); |
| 219 | if (!str) |
| 220 | return 1; |
| 221 | |
| 222 | str++; |
| 223 | |
| 224 | if (sscanf(str, "%u", val) == 1) |
| 225 | return 0; |
| 226 | |
| 227 | return 1; |
| 228 | } |
| 229 | |
| 230 | int check_strset(char *p, char *name) |
| 231 | { |
| 232 | return strncmp(p, name, strlen(name)); |
| 233 | } |
| 234 | |