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Annotation of 42BSD/usr.bin/uucp/gnsys.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char sccsid[] = "@(#)gnsys.c    5.2 (Berkeley) 7/2/83";
        !             3: #endif
        !             4: 
        !             5: /*
        !             6:  * Mods:
        !             7:  * The "retry" code below prevents uucico from calling
        !             8:  * a site which it has called earlier.
        !             9:  * Also, uucico does callok() only once for each system.
        !            10:  * Done by unc!smb
        !            11:  */
        !            12: 
        !            13: #include "uucp.h"
        !            14: #include <sys/types.h>
        !            15: #ifdef NDIR
        !            16: #include "ndir.h"
        !            17: #else
        !            18: #include <sys/dir.h>
        !            19: #endif
        !            20: 
        !            21: 
        !            22: #define LSIZE 100      /* number of systems to store */
        !            23: #define WSUFSIZE 6     /* work file name suffix size */
        !            24: 
        !            25: /*******
        !            26:  *     gnsys(sname, dir, pre)
        !            27:  *     char *sname, *dir, pre;
        !            28:  *
        !            29:  *     gnsys  -  this routine will return the next
        !            30:  *     system name which has work to be done.
        !            31:  *     "pre" is the prefix for work files.
        !            32:  *     "dir" is the directory to search.
        !            33:  *     "sname" is a string of size DIRSIZ - WSUFSIZE.
        !            34:  *
        !            35:  *     return codes:
        !            36:  *             0  -  no more names
        !            37:  *             1  -  name returned in sname
        !            38:  *             FAIL  -  bad directory
        !            39:  */
        !            40: 
        !            41: gnsys(sname, dir, pre)
        !            42: char *sname, *dir, pre;
        !            43: {
        !            44:        register char *s, *p1, *p2;
        !            45:        char px[3];
        !            46:        static char *list[LSIZE];
        !            47:        static int nitem=0, n=0, base=0;
        !            48:        char systname[NAMESIZE], filename[NAMESIZE];
        !            49:        DIR *dirp;
        !            50: 
        !            51: retry:
        !            52:        px[0] = pre;
        !            53:        px[1] = '.';
        !            54:        px[2] = '\0';
        !            55:        if (nitem == base) {
        !            56:                /* get list of systems with work */
        !            57:                int i;
        !            58:                dirp = opendir(subdir(dir,pre), "r");
        !            59:                ASSERT(dirp != NULL, "BAD DIRECTORY", dir, 0);
        !            60:                for (i = base; i < LSIZE; i++)
        !            61:                        list[i] = NULL;
        !            62:                while (gnamef(dirp, filename) != 0) {
        !            63:                        if (!prefix(px, filename))
        !            64:                                continue;
        !            65:                        p2 = filename + strlen(filename)
        !            66:                                - WSUFSIZE;
        !            67:                        p1 = filename + strlen(px);
        !            68:                        for(s = systname; p1 <= p2; p1++)
        !            69:                                *s++ = *p1;
        !            70:                        *s = '\0';
        !            71:                        if (systname[0] == '\0')
        !            72:                                continue;
        !            73:                        nitem = srchst(systname, list, nitem);
        !            74:                        if (LSIZE <= nitem) break;
        !            75:                }
        !            76: 
        !            77:                closedir(dirp);
        !            78:        }
        !            79: 
        !            80:        if (nitem == base) {
        !            81:                for (n = 0; n < nitem; n++)
        !            82:                        if (list[n] != NULL)
        !            83:                                free(list[n]);
        !            84:                return(0);
        !            85:        }
        !            86:        while(nitem > n) {
        !            87:                strcpy(sname, list[n++]);
        !            88:                if (callok(sname) == 0)
        !            89:                        return(1);
        !            90:        }
        !            91:        base = n = nitem;
        !            92:        goto retry;
        !            93: }
        !            94: 
        !            95: /***
        !            96:  *     srchst(name, list, n)
        !            97:  *     char *name, **list;
        !            98:  *     int n;
        !            99:  *
        !           100:  *     srchst  -  this routine will do a linear search
        !           101:  *     of list (list) to find name (name).
        !           102:  *     If the name is not found, it is added to the
        !           103:  *     list.
        !           104:  *     The number of items in the list (n) is
        !           105:  *     returned (incremented if a name is added).
        !           106:  *
        !           107:  *     return codes:
        !           108:  *             n - the number of items in the list
        !           109:  */
        !           110: 
        !           111: srchst(name, list, n)
        !           112: char *name;
        !           113: register char **list;
        !           114: int n;
        !           115: {
        !           116:        register int i;
        !           117:        register char *p;
        !           118: 
        !           119:        for (i = 0; i < n; i++)
        !           120:                if (strcmp(name, list[i]) == 0)
        !           121:                        break;
        !           122:        if (i >= n) {
        !           123:                if ((p = calloc((unsigned)strlen(name) + 1, sizeof (char)))
        !           124:                        == NULL)
        !           125:                        return(n);
        !           126:                strcpy(p, name);
        !           127:                list[n++] = p;
        !           128:        }
        !           129:        return(n);
        !           130: }

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