ctdb/lib/popt/poptconfig.c

   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
  12 /*@-compmempass@*/      /* FIX: item->option.longName kept, not dependent. */
  13 static void configLine(poptContext con, char * line)
  14         /*@modifies con @*/
  15 {
  16     /*@-type@*/
  17     int nameLength = strlen(con->appName);
  18     /*@=type@*/
  19     const char * entryType;
  20     const char * opt;
  21     poptItem item = alloca(sizeof(*item));
  22     int i, j;
  23
  24 /*@-boundswrite@*/
  25     memset(item, 0, sizeof(*item));
  26
  27     /*@-type@*/
  28     if (strncmp(line, con->appName, nameLength)) return;
  29     /*@=type@*/
  30
  31     line += nameLength;
  32     if (*line == '\0' || !isspace(*line)) return;
  33
  34     while (*line != '\0' && isspace(*line)) line++;
  35     entryType = line;
  36     while (*line == '\0' || !isspace(*line)) line++;
  37     *line++ = '\0';
  38
  39     while (*line != '\0' && isspace(*line)) line++;
  40     if (*line == '\0') return;
  41     opt = line;
  42     while (*line == '\0' || !isspace(*line)) line++;
  43     *line++ = '\0';
  44
  45     while (*line != '\0' && isspace(*line)) line++;
  46     if (*line == '\0') return;
  47
  48     /*@-temptrans@*/ /* FIX: line alias is saved */
  49     if (opt[0] == '-' && opt[1] == '-')
  50         item->option.longName = opt + 2;
  51     else if (opt[0] == '-' && opt[2] == '\0')
  52         item->option.shortName = opt[1];
  53     /*@=temptrans@*/
  54
  55     if (poptParseArgvString(line, &item->argc, &item->argv)) return;
  56
  57     /*@-modobserver@*/
  58     item->option.argInfo = POPT_ARGFLAG_DOC_HIDDEN;
  59     for (i = 0, j = 0; i < item->argc; i++, j++) {
  60         const char * f;
  61         if (!strncmp(item->argv[i], "--POPTdesc=", sizeof("--POPTdesc=")-1)) {
  62             f = item->argv[i] + sizeof("--POPTdesc=");
  63             if (f[0] == '$' && f[1] == '"') f++;
  64             item->option.descrip = f;
  65             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
  66             j--;
  67         } else
  68         if (!strncmp(item->argv[i], "--POPTargs=", sizeof("--POPTargs=")-1)) {
  69             f = item->argv[i] + sizeof("--POPTargs=");
  70             if (f[0] == '$' && f[1] == '"') f++;
  71             item->option.argDescrip = f;
  72             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
  73             item->option.argInfo |= POPT_ARG_STRING;
  74             j--;
  75         } else
  76         if (j != i)
  77             item->argv[j] = item->argv[i];
  78     }
  79     if (j != i) {
  80         item->argv[j] = NULL;
  81         item->argc = j;
  82     }
  83     /*@=modobserver@*/
  84 /*@=boundswrite@*/
  85
  86     /*@-nullstate@*/ /* FIX: item->argv[] may be NULL */
  87     if (!strcmp(entryType, "alias"))
  88         (void) poptAddItem(con, item, 0);
  89     else if (!strcmp(entryType, "exec"))
  90         (void) poptAddItem(con, item, 1);
  91     /*@=nullstate@*/
  92 }
  93 /*@=compmempass@*/
  94
  95 int poptReadConfigFile(poptContext con, const char * fn)
  96 {
  97     char * file;
  98     const char * 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         /*@-mods@*/
 113         errno = rc;
 114         /*@=mods@*/
 115         return POPT_ERROR_ERRNO;
 116     }
 117
 118     file = alloca(fileLength + 1);
 119     if (read(fd, (char *)file, fileLength) != fileLength) {
 120         rc = errno;
 121         (void) close(fd);
 122         /*@-mods@*/
 123         errno = rc;
 124         /*@=mods@*/
 125         return POPT_ERROR_ERRNO;
 126     }
 127     if (close(fd) == -1)
 128         return POPT_ERROR_ERRNO;
 129
 130 /*@-boundswrite@*/
 131     dst = buf = alloca(fileLength + 1);
 132
 133     chptr = file;
 134     end = (file + fileLength);
 135     /*@-infloops@*/     /* LCL: can't detect chptr++ */
 136     while (chptr < end) {
 137         switch (*chptr) {
 138           case '\n':
 139             *dst = '\0';
 140             dst = buf;
 141             while (*dst && isspace(*dst)) dst++;
 142             if (*dst && *dst != '#')
 143                 configLine(con, dst);
 144             chptr++;
 145             /*@switchbreak@*/ break;
 146           case '\\':
 147             *dst++ = *chptr++;
 148             if (chptr < end) {
 149                 if (*chptr == '\n')
 150                     dst--, chptr++;
 151                     /* \ at the end of a line does not insert a \n */
 152                 else
 153                     *dst++ = *chptr++;
 154             }
 155             /*@switchbreak@*/ break;
 156           default:
 157             *dst++ = *chptr++;
 158             /*@switchbreak@*/ break;
 159         }
 160     }
 161     /*@=infloops@*/
 162 /*@=boundswrite@*/
 163
 164     return 0;
 165 }
 166
 167 int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv)
 168 {
 169     char * fn, * home;
 170     int rc;
 171
 172     /*@-type@*/
 173     if (!con->appName) return 0;
 174     /*@=type@*/
 175
 176     rc = poptReadConfigFile(con, "/etc/popt");
 177     if (rc) return rc;
 178 #if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
 179     if (getuid() != geteuid()) return 0;
 180 #endif
 181
 182     if ((home = getenv("HOME"))) {
 183         fn = alloca(strlen(home) + 20);
 184         strcpy(fn, home);
 185         strcat(fn, "/.popt");
 186         rc = poptReadConfigFile(con, fn);
 187         if (rc) return rc;
 188     }
 189
 190     return 0;
 191 }