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没有 string.h 的手动输入

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没有 string.h 的手动输入

我正在尝试查找“string.h”的手册条目，我已安装 GNU gcc。但是当我输入时man string.h，它显示no manual entry for string.h，我不确定出了什么问题？有人能帮我吗？谢谢！

答案1

使用man man，我们可以看到手册页分为以下部分：

   1   Executable programs or shell commands
   2   System calls (functions provided by the kernel)
   3   Library calls (functions within program libraries)
   4   Special files (usually found in /dev)
   5   File formats and conventions eg /etc/passwd
   6   Games
   7   Miscellaneous  (including  macro  packages  and  conventions), e.g.
       man(7), groff(7)
   8   System administration commands (usually only for root)
   9   Kernel routines [Non standard]

请注意，第 3 节是针对的functions within program libraries，即通常记录的是单个函数，而不是特定的头文件。例如man strncpy：

STRCPY(3)                  Linux Programmer's Manual                 STRCPY(3)

NAME
       strcpy, strncpy - copy a string

SYNOPSIS
       #include <string.h>

       char *strcpy(char *dest, const char *src);

       char *strncpy(char *dest, const char *src, size_t n);

DESCRIPTION
       The  strcpy()  function  copies the string pointed to by src, including
       the terminating null byte ('\0'), to the buffer  pointed  to  by  dest.
       The  strings  may  not overlap, and the destination string dest must be
       large enough to receive the copy.  Beware  of  buffer  overruns!   (See
       BUGS.)
etc.

在这种情况下，有一个概述man string（因为有stdio- 但显然没有stdlib）

STRING(3)                  Linux Programmer's Manual                 STRING(3)

NAME
       stpcpy,  strcasecmp,  strcat, strchr, strcmp, strcoll, strcpy, strcspn,
       strdup, strfry, strlen, strncat, strncmp, strncpy,  strncasecmp,  strp‐
       brk,  strrchr, strsep, strspn, strstr, strtok, strxfrm, index, rindex -
       string operations

SYNOPSIS
       #include <strings.h>
etc.

NB 不要与 man strings它记录了strings目录第 (1) 节中的命令行实用程序。

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