+/* mymount.c
+ *
+ * Copyright (C) 2012 Simone Piccardi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*****************************************************************************
+ *
+ * File mymount.c: An example for mount function
+ *
+ * Author: S. Piccardi Aug. 2011
+ *
+ *****************************************************************************/
+#include <sys/types.h> /* primitive system data types */
+#include <sys/stat.h> /* file characteristics constants and functions */
+#include <stdlib.h> /* C standard library */
+#include <stdio.h> /* standard I/O library */
+#include <unistd.h> /* unix standard library */
+#include <string.h>
+#include <sys/mount.h>
+
+#ifdef DEBUG /* done only on debugging */
+#define debug printf
+#else
+#define debug(fmt, arg...)
+#endif /* DEBUG */
+
+
+/* Adding undefined flags in glibc headers */
+
+#ifndef MS_DIRSYNC
+#define MS_DIRSYNC 128
+#endif
+#ifndef MS_BIND
+#define MS_BIND 4096
+#endif
+#ifndef MS_MOVE
+#define MS_MOVE 8192
+#endif
+#ifndef MS_REC
+#define MS_REC 16384
+#endif
+#ifndef MS_SILENT
+#define MS_SILENT 32768
+#endif
+#ifndef MS_UNBINDABLE
+#define MS_UNBINDABLE (1<<17)
+#endif
+#ifndef MS_PRIVATE
+#define MS_PRIVATE (1<<18)
+#endif
+#ifndef MS_SLAVE
+#define MS_SLAVE (1<<19)
+#endif
+#ifndef MS_SHARED
+#define MS_SHARED (1<<20)
+#endif
+#ifndef MS_RELATIME
+#define MS_RELATIME (1<<21)
+#endif
+#ifndef MS_STRICTATIME
+#define MS_STRICTATIME (1<<24)
+#endif
+
+
+/*
+ * Program mymount
+ */
+/* Help printing routine */
+void usage(void);
+
+struct ms_flag {
+ const char *name;
+ int flag;
+};
+
+/* compare funtion */
+int ms_flag_cmp(const void *c1, const void *c2)
+{
+ struct ms_flag *v1 = (struct ms_flag *) c1;
+ struct ms_flag *v2 = (struct ms_flag *) c2;
+ return strcmp(v1->name, v2->name);
+}
+
+
+
+int main(int argc, char *argv[])
+{
+/*
+ * Variables definition
+ */
+ int i, flags=0;
+ char * mountflags=NULL, *data=NULL, *filesystemtype=NULL;
+ char *token;
+ struct ms_flag ms_values[]=
+ {
+ {"bind", MS_BIND},
+ {"dirsync",MS_DIRSYNC},
+ {"mandlock",MS_MANDLOCK},
+ {"move",MS_MOVE},
+ {"noatime",MS_NOATIME},
+ {"nodev",MS_NODEV},
+ {"nodiratime",MS_NODIRATIME},
+ {"noexec",MS_NOEXEC},
+ {"nosuid",MS_NOSUID},
+ {"private",MS_PRIVATE},
+ {"rdonly",MS_RDONLY},
+ {"rec",MS_REC},
+ {"relatime",MS_RELATIME},
+ {"remount",MS_REMOUNT},
+ {"share",MS_SHARED},
+ {"silent",MS_SILENT},
+ {"slave",MS_SLAVE},
+ {"strictatime",MS_STRICTATIME},
+ {"synchronous",MS_SYNCHRONOUS},
+ {"unbindable",MS_UNBINDABLE}
+ };
+ struct ms_flag key, *result;
+ int ms_count = sizeof(ms_values)/sizeof(struct ms_flag);
+
+ /*
+ * Input section: decode command line parameters
+ * Use getopt function
+ */
+ opterr = 0; /* don't want writing to stderr */
+ while ( (i = getopt(argc, argv, "d:f:t:h")) != -1) {
+ switch (i) {
+ /*
+ * Handling options
+ */
+ case 'h': /* help option */
+ printf("Wrong -h option use\n");
+ usage();
+ return -1;
+ break;
+ case 'd': /* options data */
+ data = optarg;
+ debug("passed option data: %s\n", data);
+ break;
+ case 't': /* options data */
+ filesystemtype = optarg;
+ debug("passed filesystem type: %s\n", filesystemtype);
+ break;
+ case 'f': /* options data */
+ mountflags = optarg;
+ debug("passed mount flags: %s\n", mountflags);
+ break;
+ case '?': /* unrecognized options */
+ printf("Unrecognized options -%c\n",optopt);
+ usage();
+ default: /* should not reached */
+ usage();
+ }
+ }
+ /* ***********************************************************
+ *
+ * Options processing completed
+ *
+ * Main code beginning
+ *
+ * ***********************************************************/
+ if ((argc - optind) != 2) { /* There must be 0 remaing arguments */
+ printf("Wrong number of arguments %d\n", argc - optind);
+ usage();
+ }
+ debug("source %s, target %s\n",argv[optind], argv[optind+1]);
+
+// printf("\n",);
+
+ if ( token = strtok(mountflags, ",") ) {
+ do {
+ key.name = token;
+ result = bsearch(&key, ms_values, ms_count, sizeof(struct ms_flag),
+ ms_flag_cmp);
+ if (result) {
+ debug("found option: %s\n",result->name);
+ flags |= result->flag;
+ } else {
+ printf("unknown flag: %s\n", key.name);
+ exit(EXIT_FAILURE);
+ }
+ } while (token=strtok(NULL,","));
+ }
+ debug("flags value %X\n", flags);
+ if (mount(argv[optind], argv[optind + 1], filesystemtype, flags, data) == -1) {
+ perror("Mount call failed");
+ exit(EXIT_FAILURE);
+ }
+ exit(EXIT_SUCCESS);
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+ printf("Program mymount: \n");
+ printf("Usage:\n");
+ printf("mymount [-h] [-d opt1[,...]] [-t type] [-f fl1[,...]] source target\n");
+ printf(" -h print this help\n");
+ printf(" -d options comma separated options data string\n");
+ printf(" -t fstype filesystemtype string\n");
+ printf(" -f flags comma separated mount flags string\n");
+ exit(1);
+}
projects / gapil.git / commitdiff