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Annotation of 42BSD/usr.bin/uucp/gnsys.c, revision 1.1.1.1

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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