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
10

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.
28
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.
70
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.
85
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.
89
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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SEE ALSO

111       bstring(3),  index(3),  rindex(3), stpcpy(3), strcasecmp(3), strcat(3),
112       strchr(3), strcmp(3),  strcoll(3),  strcpy(3),  strcspn(3),  strdup(3),
113       strfry(3),    strlen(3),    strncasecmp(3),   strncat(3),   strncmp(3),
114       strncpy(3), strpbrk(3), strrchr(3),  strsep(3),  strspn(3),  strstr(3),
115       strtok(3), strxfrm(3)
116

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)
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