函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\smack\smack_lsm.c Create Date:2022-07-27 20:49:12
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：smack_sb_eat_lsm_opts

函数原型：static int smack_sb_eat_lsm_opts(char *options, void **mnt_opts)

返回类型：int

参数：

类型参数名称
char *options
void **mnt_opts
722  from等于options, to等于options
723  bool first = true
725  当1循环
726  next等于strchr - Find the first occurrence of the character c in the string s.*@s: the string to be searched*@c: the character to search for
728  char * arg = NULL
730  如果next则len等于next减from
732  否则len等于strlen - Find the length of a string*@s: The string to be sized
735  token等于match_opt_prefix(from, len, & arg)
736  如果token不等于Opt_error则
737  arg等于kmemdup_nul - Create a NUL-terminated string from unterminated data*@s: The data to stringify*@len: The size of the data*@gfp: the GFP mask used in the kmalloc() call when allocating memory* Return: newly allocated copy of @s with NUL-termination or %NULL
738  rc等于smack_add_opt(token, arg, mnt_opts)
739  如果此条件成立可能性小(为编译器优化)(rc)则
740  释放内存
741  如果mnt_opts则smack_free_mnt_opts( * mnt_opts)
743  * mnt_opts = NULL
744  返回:rc
746  否则
747  如果非first则
748  from自减
749  len自加
751  如果to不等于from则memmove(to, from, len)
753  to加等于len
754  first = false
756  如果非from[len]则退出
758  from加等于len加1
760  to等于'\0'
761  返回:0