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Fix segfault in Linux USB serial port auto-detection

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This commit is contained in:
Adam Honse 2020-04-06 14:42:03 -05:00
parent dda8e9470f
commit 1249814e93
1 changed files with 5 additions and 1 deletions
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6
serial_port/find_usb_serial_port_linux.cpp
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@ -50,7 +50,11 @@ std::string find_usb_serial_port(unsigned short vid, unsigned short pid)
strcpy(tty_path, "/sys/class/tty/");
strcat(tty_path, ent->d_name);
readlink(tty_path, symlink_path, 1024);
/*-----------------------------------------------------------------*\
| readlink() does not null-terminate, so manually terminate it |
\*-----------------------------------------------------------------*/
ssize_t link_path_size = readlink(tty_path, symlink_path, 1024);
symlink_path[link_path_size] = '\0';
char * usb_string = strstr(symlink_path, "usb");