OS UE

man 3 getopt

man 3 string

• string functions overview

  copy from src to dst:
  char *strdup(const char *s);
  char *stpcpy(char *dest, const char *src);
  char *strcpy(char *dest, const char *src);
  char *strncpy(char *dest, const char *src, size_t n);
  size_t strxfrm(char *dest, const char *src, size_t n);
  int asprintf(char **strp, const char *fmt, ...);append with string:
  char *strncat(char *dest, const char *src, size_t n);shuffle:
  char *strfry(char *string);get length:
  size_t strlen(const char *s);compare 2 strings:
  int strncmp(const char *s1, const char *s2, size_t n);
  int strcasecmp(const char *s1, const char *s2);
  int strncasecmp(const char *s1, const char *s2, size_t n);
  char *strcat(char *dest, const char *src);
  int strcmp(const char *s1, const char *s2);
  int strcoll(const char *s1, const char *s2);---first / last index of char:
  char *index(const char *s, int c);
  char *strchr(const char *s, int c);
  char *rindex(const char *s, int c);
  char *strrchr(const char *s, int c);first index of substring:
  char *strstr(const char *haystack, const char *needle);first index of one of chars:
  char *strpbrk(const char *s, const char *chars);count until first illegal char:
  size_t strspn(const char *s, const char *chars);
  size_t strcspn(const char *s, const char *chars);split string:
  char *strsep(char **stringp, const char *delim);
  char *strtok(char *s, const char *delim);

man 3 shm_open

man 7 sem_overview

man 7 shm_overview

man 7 shm_overview

man 2 pipe- fork, pipe, write

man 2 dup2

man 2 wait

man 3 system

man 2 select_tut- also has sigaction

man 7 unix- has overview

man 3 getaddrinfo- fallback, if no ipv4 given