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  • Committer: William Grant
  • Date: 2009-05-31 01:36:47 UTC
  • mto: (1281.1.8 aufsless)
  • mto: This revision was merged to the branch mainline in revision 1300.
  • Revision ID: grantw@unimelb.edu.au-20090531013647-ar21mrde7k394ilv
Make trampoline mount jails new-style (without AUFS).

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Lines of Context:
bin/trampoline/trampoline.c
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    return ptr;
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}
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int checked_mount(const char *source, const char *target,
 
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                  const char *filesystemtype, unsigned long mountflags,
 
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                  const void *data)
 
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{
 
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    int result = mount(source, target, filesystemtype, mountflags, data);
 
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    if (result)
 
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    {
 
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        syslog(LOG_ERR, "could not mount %s on %s\n", source, target);
 
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        perror("could not mount");
 
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        exit(1);
 
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    }
 
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    return result;
 
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}
 
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/* Find the path of the user components of a jail, given a mountpoint. */
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char *jail_src(const char *jail_src_base, const char *jail_base,
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               const char *jailpath)
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    srclen = strlen(jail_src_base);
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    dstlen = strlen(jail_base);
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    src = die_if_null(malloc(strlen(jailpath) + (srclen - dstlen) + 1));
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    strcpy(src, jail_src_base);
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    strcat(src, jailpath+dstlen);
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{
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    char *jailsrc;
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    char *jaillib;
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    char *mountdata;
 
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    char *source_bits;
 
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    char *target_bits;
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    /* Check if there is something useful in the jail. If not, it's probably
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     * not mounted. */
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             }
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             syslog(LOG_NOTICE, "created mountpoint %s\n", jailpath);
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        }
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        jailsrc = jail_src(jail_src_base, jail_base, jailpath);
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        mountdata = die_if_null(malloc(3 + strlen(jailsrc) + 4 + strlen(jail_system) + 3 + 1));
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        sprintf(mountdata, "br:%s=rw:%s=ro", jailsrc, jail_system);
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        if (mount("none", jailpath, "aufs", 0, mountdata))
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        {
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            syslog(LOG_ERR, "could not mount %s\n", jailpath);
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            perror("could not mount");
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            exit(1);
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        } 
 
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        checked_mount(jail_system, jailpath, NULL, MS_BIND | MS_RDONLY, NULL);
 
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        source_bits = die_if_null(malloc(strlen(jailsrc) + 5 + 1));
 
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        target_bits = die_if_null(malloc(strlen(jailpath) + 5 + 1));
 
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        sprintf(source_bits, "%s/home", jailsrc);
 
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        sprintf(target_bits, "%s/home", jailpath);
 
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        checked_mount(source_bits, target_bits, NULL, MS_BIND, NULL);
 
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        sprintf(source_bits, "%s/tmp", jailsrc);
 
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        sprintf(target_bits, "%s/tmp", jailpath);
 
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        checked_mount(source_bits, target_bits, NULL, MS_BIND, NULL);
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        syslog(LOG_INFO, "mounted %s\n", jailpath);
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        free(jailsrc);
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        free(mountdata);
 
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        free(source_bits);
 
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        free(target_bits);
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    }
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    free(jaillib);