Linux cli command strchr

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command strchr and provides detailed information about the command strchr, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the strchr.

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NAME 🖥️ strchr 🖥️

locate character in string

LIBRARY

Standard C library (libc, -lc)

SYNOPSIS

#include <string.h>
char *strchr(const char *s, int c);
char *strrchr(const char *s, int c);
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <string.h>
char *strchrnul(const char *s, int c);

DESCRIPTION

The strchr() function returns a pointer to the first occurrence of the character c in the string s.

The strrchr() function returns a pointer to the last occurrence of the character c in the string s.

The strchrnul() function is like strchr() except that if c is not found in s, then it returns a pointer to the null byte at the end of s, rather than NULL.

Here “character” means “byte”; these functions do not work with wide or multibyte characters.

RETURN VALUE

The strchr() and strrchr() functions return a pointer to the matched character or NULL if the character is not found. The terminating null byte is considered part of the string, so that if c is specified as ‘�’, these functions return a pointer to the terminator.

The strchrnul() function returns a pointer to the matched character, or a pointer to the null byte at the end of s (i.e., s+strlen(s)) if the character is not found.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue

strchr(), strrchr(), strchrnul()

Thread safetyMT-Safe

STANDARDS

strchr()
strrchr()
C11, POSIX.1-2008.

strchrnul()
GNU.

HISTORY

strchr()
strrchr()
POSIX.1-2001, C89, SVr4, 4.3BSD.

strchrnul()
glibc 2.1.1, FreeBSD 10, NetBSD 8.

SEE ALSO

memchr(3), string(3), strlen(3), strpbrk(3), strsep(3), strspn(3), strstr(3), strtok(3), wcschr(3), wcsrchr(3)

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