Attachment 639611 Details for Bug 873862 – SGI FAM chapter 8 monitor.c example

SGI FAM chapter 8 monitor.c example

monitor.c (text/plain), 2.47 KB, created by Corey Ashford on 2012-11-06 20:56:39 UTC

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Creator: Corey Ashford

Created: 2012-11-06 20:56:39 UTC

Size: 2.47 KB

patch

obsolete

>/*
> *   monitor.c -- monitor arbitrary file or directory
> *                using fam
> */
> 
>#include <fam.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <sys/stat.h>
>#include <sys/select.h>
> 
>/* event_name() - return printable name of fam event code */
> 
>const char *event_name(int code)
>{
>    static const char *famevent[] = {
>        "",
>        "FAMChanged",
>        "FAMDeleted",
>        "FAMStartExecuting",
>        "FAMStopExecuting",
>        "FAMCreated",
>        "FAMMoved",
>        "FAMAcknowledge",
>        "FAMExists",
>        "FAMEndExist"
>    };
>    static char unknown_event[10];
> 
>    if (code < FAMChanged || code > FAMEndExist)
>    {
>        sprintf(unknown_event, "unknown (%d)", code);
>        return unknown_event;
>    }
>    return famevent[code];
>}
> 
>void main(int argc, char *argv[])
>{
>    int i, nmon, rc, fam_fd;
>    FAMConnection fc;
>    FAMRequest *frp;
>    struct stat status;
>    FAMEvent fe;
>    fd_set readfds;
> 
>    /* Allocate storage for requests */
> 
>    frp = malloc(argc * sizeof *frp);
>    if (!frp)
>    {
>        perror("malloc");
>        exit(1);
>    }
> 
>    /* Open fam connection */
> 
>    if ((FAMOpen(&fc)) < 0) 
>    {
>        perror("fam");
>        exit(1);
>    }
> 
>    /* Request monitoring for each program argument */
> 
>    for (nmon = 0, i = 1; i < argc; i++)
>    {
>        if (stat(argv[i], &status) < 0)
>        {
>            perror(argv[i]);
>            status.st_mode = 0;
>        }
>        if ((status.st_mode & S_IFMT) == S_IFDIR)
>            rc = FAMMonitorDirectory(&fc, argv[i], frp + i,
>                                     NULL);
>        else
>            rc = FAMMonitorFile(&fc, argv[i], frp + i, NULL);
>        if (rc < 0)
>        {
>            perror("FAMMonitor failed");
>            continue;
>        }
>        nmon++;
>    }
>    if (!nmon)
>    {
>        fprintf(stderr, "Nothing monitored.\n");
>        exit(1);
>    }
> 
>    /* Initialize select data structure */
> 
>    fam_fd = FAMCONNECTION_GETFD(&fc);
>    FD_ZERO(&readfds);
>    FD_SET(fam_fd, &readfds);
> 
>    /* Loop forever. */
> 
>    while(1)
>    {
>        if (select(fam_fd + 1, &readfds,
>                   NULL, NULL, NULL) < 0)
>        {
>             perror("select failed");
>             exit(1);
>        }
>        if (FD_ISSET(fam_fd, &readfds))
>        {
>            if (FAMNextEvent(&fc, &fe) < 0)
>            {
>                perror("FAMNextEvent");
>                exit(1);
>            }
>            printf("%-24s %s\n", fe.filename,
>                   event_name(fe.code));
>        }
>    }
>}

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Attachments on bug 873862: 639611