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Annotation of src/usr.bin/mg/autoexec.c, Revision 1.7

1.7     ! otto        1: /* $OpenBSD: autoexec.c,v 1.6 2005/04/03 02:09:28 db Exp $ */
1.1       vincent     2: /* this file is in the public domain */
                      3: /* Author: Vincent Labrecque <vincent@openbsd.org>     April 2002 */
                      4:
                      5: #include "def.h"
                      6: #include "funmap.h"
                      7:
                      8: #include <fnmatch.h>
                      9:
                     10: struct autoexec {
                     11:        SLIST_ENTRY(autoexec) next;     /* link in the linked list */
                     12:        const char      *pattern;       /* Pattern to match to filenames */
                     13:        PF               fp;
                     14: };
                     15:
                     16: static SLIST_HEAD(, autoexec)   autos;
                     17: static int                      ready;
                     18:
                     19: /*
                     20:  * Return a NULL terminated array of function pointers to be called
                     21:  * when we open a file that matches <fname>.  The list must be free(ed)
                     22:  * after use.
                     23:  */
                     24: PF *
                     25: find_autoexec(const char *fname)
                     26: {
1.6       db         27:        PF              *pfl, *npfl;
                     28:        int              have, used;
1.1       vincent    29:        struct autoexec *ae;
                     30:
                     31:        if (!ready)
                     32:                return (NULL);
                     33:
                     34:        pfl = NULL;
                     35:        have = 0;
                     36:        used = 0;
                     37:        SLIST_FOREACH(ae, &autos, next) {
                     38:                if (fnmatch(ae->pattern, fname, 0) == 0) {
                     39:                        if (used >= have) {
1.3       vincent    40:                                npfl = realloc(pfl, (have + 8 + 1) * sizeof(PF));
                     41:                                if (npfl == NULL)
1.1       vincent    42:                                        panic("out of memory");
1.3       vincent    43:                                pfl = npfl;
                     44:                                have += 8;
1.1       vincent    45:                        }
                     46:                        pfl[used++] = ae->fp;
                     47:                }
                     48:        }
                     49:        if (used) {
                     50:                pfl[used] = NULL;
                     51:                pfl = realloc(pfl, (used + 1) * sizeof(PF));
                     52:        }
                     53:        return (pfl);
                     54: }
                     55:
                     56: int
                     57: add_autoexec(const char *pattern, const char *func)
                     58: {
1.6       db         59:        PF               fp;
1.1       vincent    60:        struct autoexec *ae;
                     61:
                     62:        if (!ready) {
                     63:                SLIST_INIT(&autos);
                     64:                ready = 1;
                     65:        }
                     66:        fp = name_function(func);
                     67:        if (fp == NULL)
                     68:                return (FALSE);
1.6       db         69:        ae = malloc(sizeof(*ae));
1.1       vincent    70:        if (ae == NULL)
                     71:                return (FALSE);
                     72:        ae->fp = fp;
                     73:        ae->pattern = strdup(pattern);
                     74:        if (ae->pattern == NULL) {
                     75:                free(ae);
                     76:                return (FALSE);
                     77:        }
                     78:        SLIST_INSERT_HEAD(&autos, ae, next);
                     79:
                     80:        return (TRUE);
                     81: }
                     82:
                     83: int
                     84: auto_execute(int f, int n)
                     85: {
1.6       db         86:        char    patbuf[128], funcbuf[128], *patp, *funcp;
                     87:        int     s;
1.2       deraadt    88:
1.6       db         89:        if ((patp = ereply("Filename pattern: ", patbuf, sizeof(patbuf))) == NULL)
                     90:                return (ABORT);
1.4       vincent    91:        else if (patp[0] == '\0')
1.6       db         92:                return (FALSE);
                     93:        if ((funcp = ereply("Execute: ", funcbuf, sizeof(funcbuf))) == NULL)
                     94:                return (ABORT);
1.4       vincent    95:        else if (funcp[0] == '\0')
1.6       db         96:                return (FALSE);
1.4       vincent    97:        if ((s = add_autoexec(patp, funcp)) != TRUE)
1.1       vincent    98:                return (s);
                     99:        return (TRUE);
                    100: }