c - how to Find the Mount Path of Pendrive in better way? -

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I have a requirement that my embedded system is included in the program which is initially a pendrive in pendrive and specific directory Looks for If the directory is considered as a bootable device. Consider

below code: 

  uint8 Chek_ BB_rootfs_Availability () {uint8 b_flag = 0x00; Dw_PkgAvailFlag | = BB_PKG_AVAIL_MASK; If (! (System ( "ls / media1 / sda / UPGRADE_FILES / BB /"))) {path_argv [0] = "/media1/sda/UPGRADE_FILES/BB/rootfs.ubifs"; } And if (! (System ("ls / media1 / sda1 / UPGRADE_FILES / bb /"))) {path_argv [0] = "/media1/sda/UPGRADE_FILES/BB/rootfs.ubifs"; } Else if (! (System ( "ls / media2 / sda / UPGRADE_FILES / BB /"))) {path_argv [0] = "/media2/sda/UPGRADE_FILES/BB/rootfs.ubifs"; } And if (! (System ("ls / media2 / sda1 / UPGRADE_FILES / bb /"))) {path_argv [0] = "/media2/sda1/UPGRADE_FILES/BB/rootfs.ubifs"; } And if (! (System ("ls / media / sda / UPGRADE_FILES / bb /"))} {path_argv [0] = "/ media / sda / urpidihii / bb / roff.a.f.} and if (! (System ("ls / media / sda1 / UPGRADE_FILES / bb /"))) {path_argv [0] = "/ media / sda / urpdaiii / bb / roffaff.f.f } Other {/ * Normal Boot * / dw_PkgAvailFlag & amp; = ~ (BB_PKG_AVAIL_MASK); B_flag = 0x01; } Return b_flag; }   
 If the root is available I call a script which upgrades.  
 Is this ... if there is a better condition than using any condition and system code.  
 In addition to this, I am facing another problem when I am using the  system  call then I have an argument for the  system  call Can not pass  char * path_argv [0]  as. Again I have to do this  
  system ("/ media / sda1 / UPGRADE_FILES / BB / UPGRADEBB_File.sh '/media/sda1/UPGRADE_FILES/BB/rootfs.ubifs'");   
 Any way I can pass the pointer without using the  execv  call because I do not have to make any new process.   
 
 
 You can view the system call. This allows you to test for the existence of a certain file or directory.  
 
 You can use "print" in "string".  
  Four CMDs [1024] = ""; / * Ensure that this buffer is large enough * / sprint (CMD, "/ media / sda1 / urpardaaiiIls / bb / uparab file.sh '% s'', path_ARGR [0]); Int Results = System (CMD);

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