source3/popt/poptconfig.c

   1 /* (C) 1998 Red Hat Software, Inc. -- Licensing details are in the COPYING
   2    file accompanying popt source distributions, available from
   3    ftp://ftp.redhat.com/pub/code/popt */
   4
   5 #include "system.h"
   6 #include "poptint.h"
   7
   8 static void configLine(poptContext con, char * line) {
   9     int nameLength = strlen(con->appName);
  10     char * opt;
  11     struct poptAlias alias;
  12     char * entryType;
  13     char * longName = NULL;
  14     char shortName = '\0';
  15
  16     if (strncmp(line, con->appName, nameLength)) return;
  17     line += nameLength;
  18     if (!*line || !isspace(*line)) return;
  19     while (*line && isspace(*line)) line++;
  20     entryType = line;
  21
  22     while (!*line || !isspace(*line)) line++;
  23     *line++ = '\0';
  24     while (*line && isspace(*line)) line++;
  25     if (!*line) return;
  26     opt = line;
  27
  28     while (!*line || !isspace(*line)) line++;
  29     *line++ = '\0';
  30     while (*line && isspace(*line)) line++;
  31     if (!*line) return;
  32
  33     if (opt[0] == '-' && opt[1] == '-')
  34         longName = opt + 2;
  35     else if (opt[0] == '-' && !opt[2])
  36         shortName = opt[1];
  37
  38     if (!strcmp(entryType, "alias")) {
  39         if (poptParseArgvString(line, &alias.argc, &alias.argv)) return;
  40         alias.longName = longName, alias.shortName = shortName;
  41         poptAddAlias(con, alias, 0);
  42     } else if (!strcmp(entryType, "exec")) {
  43         con->execs = realloc(con->execs,
  44                                 sizeof(*con->execs) * (con->numExecs + 1));
  45         if (longName)
  46             con->execs[con->numExecs].longName = xstrdup(longName);
  47         else
  48             con->execs[con->numExecs].longName = NULL;
  49
  50         con->execs[con->numExecs].shortName = shortName;
  51         con->execs[con->numExecs].script = xstrdup(line);
  52
  53         con->numExecs++;
  54     }
  55 }
  56
  57 int poptReadConfigFile(poptContext con, const char * fn) {
  58     char * file=NULL, * chptr, * end;
  59     char * buf=NULL, * dst;
  60     int fd, rc;
  61     int fileLength;
  62
  63     fd = open(fn, O_RDONLY);
  64     if (fd < 0) {
  65         if (errno == ENOENT)
  66             return 0;
  67         else
  68             return POPT_ERROR_ERRNO;
  69     }
  70
  71     fileLength = lseek(fd, 0, SEEK_END);
  72     (void) lseek(fd, 0, 0);
  73
  74     file = malloc(fileLength + 1);
  75     if (read(fd, file, fileLength) != fileLength) {
  76         rc = errno;
  77         close(fd);
  78         errno = rc;
  79         if (file) free(file);
  80         return POPT_ERROR_ERRNO;
  81     }
  82     close(fd);
  83
  84     dst = buf = malloc(fileLength + 1);
  85
  86     chptr = file;
  87     end = (file + fileLength);
  88     while (chptr < end) {
  89         switch (*chptr) {
  90           case '\n':
  91             *dst = '\0';
  92             dst = buf;
  93             while (*dst && isspace(*dst)) dst++;
  94             if (*dst && *dst != '#') {
  95                 configLine(con, dst);
  96             }
  97             chptr++;
  98             break;
  99           case '\\':
 100             *dst++ = *chptr++;
 101             if (chptr < end) {
 102                 if (*chptr == '\n')
 103                     dst--, chptr++;
 104                     /* \ at the end of a line does not insert a \n */
 105                 else
 106                     *dst++ = *chptr++;
 107             }
 108             break;
 109           default:
 110             *dst++ = *chptr++;
 111             break;
 112         }
 113     }
 114
 115     free(file);
 116     free(buf);
 117
 118     return 0;
 119 }
 120
 121 int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv) {
 122     char * fn, * home;
 123     int rc;
 124
 125     if (!con->appName) return 0;
 126
 127     rc = poptReadConfigFile(con, "/etc/popt");
 128     if (rc) return rc;
 129     if (getuid() != geteuid()) return 0;
 130
 131     if ((home = getenv("HOME"))) {
 132         fn = malloc(strlen(home) + 20);
 133         strcpy(fn, home);
 134         strcat(fn, "/.popt");
 135         rc = poptReadConfigFile(con, fn);
 136         free(fn);
 137         if (rc) return rc;
 138     }
 139
 140     return 0;
 141 }
 142