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Viewing changes to src/lxc/freezer.c

  • Committer: Bazaar Package Importer
  • Author(s): Guido Trotter
  • Date: 2010-08-04 13:23:42 UTC
  • mfrom: (1.2.5 upstream)
  • mto: (3.1.15 sid)
  • mto: This revision was merged to the branch mainline in revision 8.
  • Revision ID: james.westby@ubuntu.com-20100804132342-m9ok3c7o5bhzab2k
Tags: upstream-0.7.2
Import upstream version 0.7.2

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Lines of Context:
src/lxc/freezer.c
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{
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        char *nsgroup;
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        char freezer[MAXPATHLEN], *f;
 
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        char tmpf[32];
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        int fd, ret;
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        ret = lxc_cgroup_path_get(&nsgroup, name);
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        snprintf(freezer, MAXPATHLEN, "%s/freezer.state", nsgroup);
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        fd = open(freezer, O_WRONLY);
 
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        fd = open(freezer, O_RDWR);
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        if (fd < 0) {
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                SYSERROR("failed to open freezer for '%s'", name);
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                return -1;
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        if (freeze) {
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                f = "FROZEN";
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                ret = write(fd, f, strlen(f) + 1) < 0;
 
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                ret = write(fd, f, strlen(f) + 1);
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        } else {
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                f = "THAWED";
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                ret = write(fd, f, strlen(f) + 1) < 0;
 
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                ret = write(fd, f, strlen(f) + 1);
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                /* compatibility code with old freezer interface */
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                if (ret) {
 
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                if (ret < 0) {
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                        f = "RUNNING";
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                        ret = write(fd, f, strlen(f) + 1) < 0;
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                }
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        }
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        if (ret < 0) {
 
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                SYSERROR("failed to write '%s' to '%s'", f, freezer);
 
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                goto out;
 
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        }
 
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        while (1) {
 
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                ret = lseek(fd, 0L, SEEK_SET);
 
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                if (ret < 0) {
 
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                        SYSERROR("failed to lseek on file '%s'", freezer);
 
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                        goto out;
 
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                }
 
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                ret = read(fd, tmpf, sizeof(tmpf));
 
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                if (ret < 0) {
 
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                        SYSERROR("failed to read to '%s'", freezer);
 
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                        goto out;
 
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                }
 
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                ret = strncmp(f, tmpf, strlen(f));
 
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                if (!ret)
 
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                        break;          /* Success */
 
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                sleep(1);
 
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                ret = lseek(fd, 0L, SEEK_SET);
 
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                if (ret < 0) {
 
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                        SYSERROR("failed to lseek on file '%s'", freezer);
 
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                        goto out;
 
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                }
 
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                ret = write(fd, f, strlen(f) + 1);
 
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                if (ret < 0) {
 
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                        SYSERROR("failed to write '%s' to '%s'", f, freezer);
 
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                        goto out;
 
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                }
 
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        }
 
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out:
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        close(fd);
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        if (ret) 
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                SYSERROR("failed to write to '%s'", freezer);
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        return ret;
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}
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