popt/poptconfig.c

   1 /** \ingroup popt
   2  * \file popt/poptconfig.c
   3  */
   4
   5 /* (C) 1998-2000 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, unsigned 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 = (poptItem) alloca(sizeof(*item));
  22     int i, j;
  23
  24     memset(item, 0, sizeof(*item));
  25
  26     /*@-type@*/
  27     if (strncmp(line, con->appName, nameLength)) return;
  28     /*@=type@*/
  29
  30     line += nameLength;
  31     if (*line == '\0' || !isspace(*line)) return;
  32
  33     while (*line != '\0' && isspace(*line)) line++;
  34     entryType = line;
  35     while (*line == '\0' || !isspace(*line)) line++;
  36     *line++ = '\0';
  37
  38     while (*line != '\0' && isspace(*line)) line++;
  39     if (*line == '\0') return;
  40     opt = line;
  41     while (*line == '\0' || !isspace(*line)) line++;
  42     *line++ = '\0';
  43
  44     while (*line != '\0' && isspace(*line)) line++;
  45     if (*line == '\0') return;
  46
  47     /*@-temptrans@*/ /* FIX: line alias is saved */
  48     if (opt[0] == '-' && opt[1] == '-')
  49         item->option.longName = opt + 2;
  50     else if (opt[0] == '-' && opt[2] == '\0')
  51         item->option.shortName = opt[1];
  52     /*@=temptrans@*/
  53
  54     if (poptParseArgvString(line, &item->argc, &item->argv)) return;
  55
  56     /*@-modobserver@*/
  57     item->option.argInfo = POPT_ARGFLAG_DOC_HIDDEN;
  58     for (i = 0, j = 0; i < item->argc; i++, j++) {
  59         const char * f;
  60         if (!strncmp(item->argv[i], "--POPTdesc=", sizeof("--POPTdesc=")-1)) {
  61             f = item->argv[i] + sizeof("--POPTdesc=");
  62             if (f[0] == '$' && f[1] == '"') f++;
  63             item->option.descrip = f;
  64             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
  65             j--;
  66         } else
  67         if (!strncmp(item->argv[i], "--POPTargs=", sizeof("--POPTargs=")-1)) {
  68             f = item->argv[i] + sizeof("--POPTargs=");
  69             if (f[0] == '$' && f[1] == '"') f++;
  70             item->option.argDescrip = f;
  71             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
  72             item->option.argInfo |= POPT_ARG_STRING;
  73             j--;
  74         } else
  75         if (j != i)
  76             item->argv[j] = item->argv[i];
  77     }
  78     if (j != i) {
  79         item->argv[j] = NULL;
  80         item->argc = j;
  81     }
  82     /*@=modobserver@*/
  83
  84     /*@-nullstate@*/ /* FIX: item->argv[] may be NULL */
  85     if (!strcmp(entryType, "alias"))
  86         (void) poptAddItem(con, item, 0);
  87     else if (!strcmp(entryType, "exec"))
  88         (void) poptAddItem(con, item, 1);
  89     /*@=nullstate@*/
  90 }
  91 /*@=compmempass@*/
  92
  93 int poptReadConfigFile(poptContext con, const char * fn)
  94 {
  95     const unsigned char * file, * chptr, * end;
  96     unsigned char * buf;
  97 /*@dependent@*/ unsigned char * dst;
  98     int fd, rc;
  99     off_t fileLength;
 100
 101     fd = open(fn, O_RDONLY);
 102     if (fd < 0)
 103         return (errno == ENOENT ? 0 : POPT_ERROR_ERRNO);
 104
 105     fileLength = lseek(fd, 0, SEEK_END);
 106     if (fileLength == -1 || lseek(fd, 0, 0) == -1) {
 107         rc = errno;
 108         (void) close(fd);
 109         /*@-mods@*/
 110         errno = rc;
 111         /*@=mods@*/
 112         return POPT_ERROR_ERRNO;
 113     }
 114
 115     file = alloca(fileLength + 1);
 116     if (read(fd, (char *)file, fileLength) != fileLength) {
 117         rc = errno;
 118         (void) close(fd);
 119         /*@-mods@*/
 120         errno = rc;
 121         /*@=mods@*/
 122         return POPT_ERROR_ERRNO;
 123     }
 124     if (close(fd) == -1)
 125         return POPT_ERROR_ERRNO;
 126
 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
 159     return 0;
 160 }
 161
 162 int poptReadDefaultConfig(poptContext con, /*@unused@*/ UNUSED(int useEnv))
 163 {
 164     char * fn, * home;
 165     int rc;
 166
 167     /*@-type@*/
 168     if (!con->appName) return 0;
 169     /*@=type@*/
 170
 171     rc = poptReadConfigFile(con, "/etc/popt");
 172     if (rc) return rc;
 173     if (getuid() != geteuid()) return 0;
 174
 175     if ((home = getenv("HOME"))) {
 176         fn = alloca(strlen(home) + 20);
 177         strcpy(fn, home);
 178         strcat(fn, "/.popt");
 179         rc = poptReadConfigFile(con, fn);
 180         if (rc) return rc;
 181     }
 182
 183     return 0;
 184 }