string(3)

1STRING(3)                  Linux Programmer's Manual                 STRING(3)
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NAME

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

12       #include <strings.h>
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14       int strcasecmp(const char *s1, const char *s2);
15              Compare the strings s1 and s2 ignoring case.
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17       int strncasecmp(const char *s1, const char *s2, size_t n);
18              Compare the first n bytes of the  strings  s1  and  s2  ignoring
19              case.
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21       char *index(const char *s, int c);
22              Return  a  pointer to the first occurrence of the character c in
23              the string s.
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25       char *rindex(const char *s, int c);
26              Return a pointer to the last occurrence of the  character  c  in
27              the string s.
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29       #include <string.h>
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31       char *stpcpy(char *restrict dest, const char *restrict src);
32              Copy  a  string from src to dest, returning a pointer to the end
33              of the resulting string at dest.
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35       char *strcat(char *restrict dest, const char *restrict src);
36              Append the string src to the string dest,  returning  a  pointer
37              dest.
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39       char *strchr(const char *s, int c);
40              Return  a  pointer to the first occurrence of the character c in
41              the string s.
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43       int strcmp(const char *s1, const char *s2);
44              Compare the strings s1 with s2.
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46       int strcoll(const char *s1, const char *s2);
47              Compare the strings s1 with s2 using the current locale.
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49       char *strcpy(char *restrict dest, const char *restrict src);
50              Copy the string src to dest, returning a pointer to the start of
51              dest.
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53       size_t strcspn(const char *s, const char *reject);
54              Calculate  the  length  of  the  initial segment of the string s
55              which does not contain any of bytes in the string reject,
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57       char *strdup(const char *s);
58              Return a duplicate of the string s  in  memory  allocated  using
59              malloc(3).
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61       char *strfry(char *string);
62              Randomly swap the characters in string.
63
64       size_t strlen(const char *s);
65              Return the length of the string s.
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67       char *strncat(char *restrict dest, const char *restrict src, size_t n);
68              Append  at  most n bytes from the string src to the string dest,
69              returning a pointer to dest.
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71       int strncmp(const char *s1, const char *s2, size_t n);
72              Compare at most n bytes of the strings s1 and s2.
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74       char *strncpy(char *restrict dest, const char *restrict src, size_t n);
75              Copy at most n bytes  from  string  src  to  dest,  returning  a
76              pointer to the start of dest.
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78       char *strpbrk(const char *s, const char *accept);
79              Return  a pointer to the first occurrence in the string s of one
80              of the bytes in the string accept.
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82       char *strrchr(const char *s, int c);
83              Return a pointer to the last occurrence of the  character  c  in
84              the string s.
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86       char *strsep(char **restrict stringp, const char *restrict delim);
87              Extract the initial token in stringp that is delimited by one of
88              the bytes in delim.
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90       size_t strspn(const char *s, const char *accept);
91              Calculate the length of the starting segment  in  the  string  s
92              that consists entirely of bytes in accept.
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94       char *strstr(const char *haystack, const char *needle);
95              Find  the first occurrence of the substring needle in the string
96              haystack, returning a pointer to the found substring.
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98       char *strtok(char *restrict s, const char *restrict delim);
99              Extract tokens from the string s that are delimited  by  one  of
100              the bytes in delim.
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102       size_t strxfrm(char *restrict dst, const char *restrict src, size_t n);
103              Transforms  src  to  the  current  locale and copies the first n
104              bytes to dst.
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DESCRIPTION

107       The string functions perform  operations  on  null-terminated  strings.
108       See the individual man pages for descriptions of each function.
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COLOPHON

118       This  page  is  part of release 5.13 of the Linux man-pages project.  A
119       description of the project, information about reporting bugs,  and  the
120       latest     version     of     this    page,    can    be    found    at
121       https://www.kernel.org/doc/man-pages/.
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125                                  2021-03-22                         STRING(3)

NAME

SYNOPSIS

DESCRIPTION

SEE ALSO

COLOPHON