glusterfs

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#include <stdio.h>
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#include <stdlib.h>
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#include <glusterfs/api/glfs.h>
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#include <glusterfs/api/glfs-handles.h>
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int
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main(int argc, char *argv[])
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{
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    int ret = 0;
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    off_t off = 0;
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    size_t len = 0;
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    glfs_t *fs = NULL;
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    glfs_fd_t *fd = NULL;
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    if (argc != 7) {
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        fprintf(
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            stderr,
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            "Syntax: %s <host> <volname> <file-path> <off> <len> <log-file>\n",
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            argv[0]);
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        return 1;
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    }
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    fs = glfs_new(argv[2]);
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    if (!fs) {
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        fprintf(stderr, "glfs_new: returned NULL\n");
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        return 1;
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    }
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    ret = glfs_set_volfile_server(fs, "tcp", argv[1], 24007);
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    if (ret != 0) {
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        fprintf(stderr, "glfs_set_volfile_server: returned %d\n", ret);
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        goto out;
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    }
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    ret = glfs_set_logging(fs, argv[6], 7);
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    if (ret != 0) {
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        fprintf(stderr, "glfs_set_logging: returned %d\n", ret);
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        goto out;
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    }
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    ret = glfs_init(fs);
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    if (ret != 0) {
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        fprintf(stderr, "glfs_init: returned %d\n", ret);
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        goto out;
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    }
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    fd = glfs_open(fs, argv[3], O_RDWR);
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    if (fd == NULL) {
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        fprintf(stderr, "glfs_open: returned NULL\n");
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        goto out;
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    }
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    /* Note that off_t is signed but size_t isn't. */
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    off = strtol(argv[4], NULL, 10);
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    len = strtoul(argv[5], NULL, 10);
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    ret = glfs_discard(fd, off, len);
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    if (ret <= 0) {
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        fprintf(stderr, "glfs_discard: returned %d\n", ret);
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        goto out;
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    }
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    ret = 0;
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out:
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    if (fd)
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        glfs_close(fd);
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    glfs_fini(fs);
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    return ret;
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}
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