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popt/poptconfig.c

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00001 
00005 /* (C) 1998-2000 Red Hat, Inc. -- Licensing details are in the COPYING
00006    file accompanying popt source distributions, available from 
00007    ftp://ftp.rpm.org/pub/rpm/dist. */
00008 
00009 #include "system.h"
00010 #include "poptint.h"
00011 
00012 /*@-compmempass@*/      /* FIX: item->option.longName kept, not dependent. */
00013 static void configLine(poptContext con, char * line)
00014         /*@modifies con @*/
00015 {
00016     int nameLength = strlen(con->appName);
00017     const char * entryType;
00018     const char * opt;
00019     poptItem item = alloca(sizeof(*item));
00020     int i, j;
00021     
00022     memset(item, 0, sizeof(*item));
00023 
00024     if (strncmp(line, con->appName, nameLength)) return;
00025     line += nameLength;
00026     if (*line == '\0' || !isspace(*line)) return;
00027 
00028     while (*line != '\0' && isspace(*line)) line++;
00029     entryType = line;
00030     while (*line == '\0' || !isspace(*line)) line++;
00031     *line++ = '\0';
00032 
00033     while (*line != '\0' && isspace(*line)) line++;
00034     if (*line == '\0') return;
00035     opt = line;
00036     while (*line == '\0' || !isspace(*line)) line++;
00037     *line++ = '\0';
00038 
00039     while (*line != '\0' && isspace(*line)) line++;
00040     if (*line == '\0') return;
00041 
00042     if (opt[0] == '-' && opt[1] == '-')
00043         item->option.longName = opt + 2;
00044     else if (opt[0] == '-' && opt[2] == '\0')
00045         item->option.shortName = opt[1];
00046 
00047     if (poptParseArgvString(line, &item->argc, &item->argv)) return;
00048 
00049     /*@-modobserver@*/
00050     item->option.argInfo = POPT_ARGFLAG_DOC_HIDDEN;
00051     for (i = 0, j = 0; i < item->argc; i++, j++) {
00052         const char * f;
00053         if (!strncmp(item->argv[i], "--POPTdesc=", sizeof("--POPTdesc=")-1)) {
00054             f = item->argv[i] + sizeof("--POPTdesc=");
00055             if (f[0] == '$' && f[1] == '"') f++;
00056             item->option.descrip = f;
00057             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
00058             j--;
00059         } else
00060         if (!strncmp(item->argv[i], "--POPTargs=", sizeof("--POPTargs=")-1)) {
00061             f = item->argv[i] + sizeof("--POPTargs=");
00062             if (f[0] == '$' && f[1] == '"') f++;
00063             item->option.argDescrip = f;
00064             item->option.argInfo &= ~POPT_ARGFLAG_DOC_HIDDEN;
00065             item->option.argInfo |= POPT_ARG_STRING;
00066             j--;
00067         } else
00068         if (j != i)
00069             item->argv[j] = item->argv[i];
00070     }
00071     if (j != i) {
00072         item->argv[j] = NULL;
00073         item->argc = j;
00074     }
00075     
00076     /*@=modobserver@*/
00077         
00078     if (!strcmp(entryType, "alias"))
00079         (void) poptAddItem(con, item, 0);
00080     else if (!strcmp(entryType, "exec"))
00081         (void) poptAddItem(con, item, 1);
00082 }
00083 /*@=compmempass@*/
00084 
00085 int poptReadConfigFile(poptContext con, const char * fn)
00086 {
00087     const char * file, * chptr, * end;
00088     char * buf;
00089 /*@dependent@*/ char * dst;
00090     int fd, rc;
00091     off_t fileLength;
00092 
00093     fd = open(fn, O_RDONLY);
00094     if (fd < 0)
00095         return (errno == ENOENT ? 0 : POPT_ERROR_ERRNO);
00096 
00097     fileLength = lseek(fd, 0, SEEK_END);
00098     if (fileLength == -1 || lseek(fd, 0, 0) == -1) {
00099         rc = errno;
00100         (void) close(fd);
00101         errno = rc;
00102         return POPT_ERROR_ERRNO;
00103     }
00104 
00105     file = alloca(fileLength + 1);
00106     if (read(fd, (char *)file, fileLength) != fileLength) {
00107         rc = errno;
00108         (void) close(fd);
00109         errno = rc;
00110         return POPT_ERROR_ERRNO;
00111     }
00112     if (close(fd) == -1)
00113         return POPT_ERROR_ERRNO;
00114 
00115     dst = buf = alloca(fileLength + 1);
00116 
00117     chptr = file;
00118     end = (file + fileLength);
00119     /*@-infloops@*/     /* LCL: can't detect chptr++ */
00120     while (chptr < end) {
00121         switch (*chptr) {
00122           case '\n':
00123             *dst = '\0';
00124             dst = buf;
00125             while (*dst && isspace(*dst)) dst++;
00126             if (*dst && *dst != '#')
00127                 configLine(con, dst);
00128             chptr++;
00129             break;
00130           case '\\':
00131             *dst++ = *chptr++;
00132             if (chptr < end) {
00133                 if (*chptr == '\n') 
00134                     dst--, chptr++;     
00135                     /* \ at the end of a line does not insert a \n */
00136                 else
00137                     *dst++ = *chptr++;
00138             }
00139             break;
00140           default:
00141             *dst++ = *chptr++;
00142             break;
00143         }
00144     }
00145     /*@=infloops@*/
00146 
00147     return 0;
00148 }
00149 
00150 int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv) {
00151     char * fn, * home;
00152     int rc;
00153 
00154     if (!con->appName) return 0;
00155 
00156     rc = poptReadConfigFile(con, "/etc/popt");
00157     if (rc) return rc;
00158     if (getuid() != geteuid()) return 0;
00159 
00160     if ((home = getenv("HOME"))) {
00161         fn = alloca(strlen(home) + 20);
00162         strcpy(fn, home);
00163         strcat(fn, "/.popt");
00164         rc = poptReadConfigFile(con, fn);
00165         if (rc) return rc;
00166     }
00167 
00168     return 0;
00169 }

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