The Android Open Source Project | 10e23ee | 2009-03-03 19:30:30 -0800 | [diff] [blame] | 1 | /** \ingroup popt |
| 2 | * \file popt/poptconfig.c |
| 3 | */ |
| 4 | |
| 5 | /* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING |
| 6 | file accompanying popt source distributions, available from |
| 7 | ftp://ftp.rpm.org/pub/rpm/dist. */ |
| 8 | |
| 9 | #include "system.h" |
| 10 | #include "poptint.h" |
| 11 | /*@access poptContext @*/ |
| 12 | |
| 13 | /*@-compmempass@*/ /* FIX: item->option.longName kept, not dependent. */ |
| 14 | static void configLine(poptContext con, char * line) |
| 15 | /*@modifies con @*/ |
| 16 | { |
| 17 | size_t nameLength; |
| 18 | const char * entryType; |
| 19 | const char * opt; |
| 20 | poptItem item = alloca(sizeof(*item)); |
| 21 | int i, j; |
| 22 | |
| 23 | if (con->appName == NULL) |
| 24 | return; |
| 25 | nameLength = strlen(con->appName); |
| 26 | |
| 27 | /*@-boundswrite@*/ |
| 28 | memset(item, 0, sizeof(*item)); |
| 29 | |
| 30 | if (strncmp(line, con->appName, nameLength)) return; |
| 31 | |
| 32 | line += nameLength; |
| 33 | if (*line == '\0' || !isspace(*line)) return; |
| 34 | |
| 35 | while (*line != '\0' && isspace(*line)) line++; |
| 36 | entryType = line; |
| 37 | while (*line == '\0' || !isspace(*line)) line++; |
| 38 | *line++ = '\0'; |
| 39 | |
| 40 | while (*line != '\0' && isspace(*line)) line++; |
| 41 | if (*line == '\0') return; |
| 42 | opt = line; |
| 43 | while (*line == '\0' || !isspace(*line)) line++; |
| 44 | *line++ = '\0'; |
| 45 | |
| 46 | while (*line != '\0' && isspace(*line)) line++; |
| 47 | if (*line == '\0') return; |
| 48 | |
| 49 | /*@-temptrans@*/ /* FIX: line alias is saved */ |
| 50 | if (opt[0] == '-' && opt[1] == '-') |
| 51 | item->option.longName = opt + 2; |
| 52 | else if (opt[0] == '-' && opt[2] == '\0') |
| 53 | item->option.shortName = opt[1]; |
| 54 | /*@=temptrans@*/ |
| 55 | |
| 56 | if (poptParseArgvString(line, &item->argc, &item->argv)) return; |
| 57 | |
| 58 | /*@-modobserver@*/ |
| 59 | item->option.argInfo = POPT_ARGFLAG_DOC_HIDDEN; |
| 60 | for (i = 0, j = 0; i < item->argc; i++, j++) { |
| 61 | const char * f; |
| 62 | if (!strncmp(item->argv[i], "--POPTdesc=", sizeof("--POPTdesc=")-1)) { |
| 63 | f = item->argv[i] + sizeof("--POPTdesc="); |
| 64 | if (f[0] == '$' && f[1] == '"') f++; |
| 65 | item->option.descrip = f; |
| 66 | item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN; |
| 67 | j--; |
| 68 | } else |
| 69 | if (!strncmp(item->argv[i], "--POPTargs=", sizeof("--POPTargs=")-1)) { |
| 70 | f = item->argv[i] + sizeof("--POPTargs="); |
| 71 | if (f[0] == '$' && f[1] == '"') f++; |
| 72 | item->option.argDescrip = f; |
| 73 | item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN; |
| 74 | item->option.argInfo |= POPT_ARG_STRING; |
| 75 | j--; |
| 76 | } else |
| 77 | if (j != i) |
| 78 | item->argv[j] = item->argv[i]; |
| 79 | } |
| 80 | if (j != i) { |
| 81 | item->argv[j] = NULL; |
| 82 | item->argc = j; |
| 83 | } |
| 84 | /*@=modobserver@*/ |
| 85 | /*@=boundswrite@*/ |
| 86 | |
| 87 | /*@-nullstate@*/ /* FIX: item->argv[] may be NULL */ |
| 88 | if (!strcmp(entryType, "alias")) |
| 89 | (void) poptAddItem(con, item, 0); |
| 90 | else if (!strcmp(entryType, "exec")) |
| 91 | (void) poptAddItem(con, item, 1); |
| 92 | /*@=nullstate@*/ |
| 93 | } |
| 94 | /*@=compmempass@*/ |
| 95 | |
| 96 | int poptReadConfigFile(poptContext con, const char * fn) |
| 97 | { |
| 98 | const char * file, * chptr, * end; |
| 99 | char * buf; |
| 100 | /*@dependent@*/ char * dst; |
| 101 | int fd, rc; |
| 102 | off_t fileLength; |
| 103 | |
| 104 | fd = open(fn, O_RDONLY); |
| 105 | if (fd < 0) |
| 106 | return (errno == ENOENT ? 0 : POPT_ERROR_ERRNO); |
| 107 | |
| 108 | fileLength = lseek(fd, 0, SEEK_END); |
| 109 | if (fileLength == -1 || lseek(fd, 0, 0) == -1) { |
| 110 | rc = errno; |
| 111 | (void) close(fd); |
| 112 | errno = rc; |
| 113 | return POPT_ERROR_ERRNO; |
| 114 | } |
| 115 | |
| 116 | file = alloca(fileLength + 1); |
| 117 | if (read(fd, (char *)file, fileLength) != fileLength) { |
| 118 | rc = errno; |
| 119 | (void) close(fd); |
| 120 | errno = rc; |
| 121 | return POPT_ERROR_ERRNO; |
| 122 | } |
| 123 | if (close(fd) == -1) |
| 124 | return POPT_ERROR_ERRNO; |
| 125 | |
| 126 | /*@-boundswrite@*/ |
| 127 | dst = buf = alloca(fileLength + 1); |
| 128 | |
| 129 | chptr = file; |
| 130 | end = (file + fileLength); |
| 131 | /*@-infloops@*/ /* LCL: can't detect chptr++ */ |
| 132 | while (chptr < end) { |
| 133 | switch (*chptr) { |
| 134 | case '\n': |
| 135 | *dst = '\0'; |
| 136 | dst = buf; |
| 137 | while (*dst && isspace(*dst)) dst++; |
| 138 | if (*dst && *dst != '#') |
| 139 | configLine(con, dst); |
| 140 | chptr++; |
| 141 | /*@switchbreak@*/ break; |
| 142 | case '\\': |
| 143 | *dst++ = *chptr++; |
| 144 | if (chptr < end) { |
| 145 | if (*chptr == '\n') |
| 146 | dst--, chptr++; |
| 147 | /* \ at the end of a line does not insert a \n */ |
| 148 | else |
| 149 | *dst++ = *chptr++; |
| 150 | } |
| 151 | /*@switchbreak@*/ break; |
| 152 | default: |
| 153 | *dst++ = *chptr++; |
| 154 | /*@switchbreak@*/ break; |
| 155 | } |
| 156 | } |
| 157 | /*@=infloops@*/ |
| 158 | /*@=boundswrite@*/ |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv) |
| 164 | { |
| 165 | char * fn, * home; |
| 166 | int rc; |
| 167 | |
| 168 | if (con->appName == NULL) return 0; |
| 169 | |
| 170 | rc = poptReadConfigFile(con, "/etc/popt"); |
| 171 | if (rc) return rc; |
| 172 | |
| 173 | if ((home = getenv("HOME"))) { |
| 174 | fn = alloca(strlen(home) + 20); |
| 175 | strcpy(fn, home); |
| 176 | strcat(fn, "/.popt"); |
| 177 | rc = poptReadConfigFile(con, fn); |
| 178 | if (rc) return rc; |
| 179 | } |
| 180 | |
| 181 | return 0; |
| 182 | } |