shichao-an

#include <unistd.h>

int execl(const char *pathname, const char *arg0, ... /* (char *)0 */ );
int execv(const char *pathname, char *const argv[]);
int execle(const char *pathname, const char *arg0, ...
           /* (char *)0, char *const envp[] */ );
int execve(const char *pathname, char *const argv[], char *const envp[]);
int execlp(const char *filename, const char *arg0, ... /* (char *)0 */ );
int execvp(const char *filename, char *const argv[]);
int fexecve(int fd, char *const argv[], char *const envp[]);

shichao-an

#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>

pid_t wait3(int *statloc, int options, struct rusage *rusage);
pid_t wait4(pid_t pid, int *statloc, int options, struct rusage *rusage);

/* Both return: process ID if OK, 0, or −1 on error */

shichao-an

#include <sys/wait.h>

int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options);

/* Returns: 0 if OK, −1 on error */

shichao-an

#include <sys/wait.h>

pid_t wait(int *statloc);
pid_t waitpid(pid_t pid, int *statloc, int options);

/* Both return: process ID if OK, 0 (see later), or −1 on error */

shichao-an

#include "unp.h"

ssize_t readn(int filedes, void *buff, size_t nbytes);
ssize_t writen(int filedes, const void *buff, size_t nbytes);
ssize_t readline(int filedes, void *buff, size_t maxlen);

/* All return: number of bytes read or written, –1 on error */

shichao-an

#include "unp.h"

int sock_bind_wild(int sockfd, int family);
/* Returns: 0 if OK, -1 on error */

int sock_cmp_addr(const struct sockaddr *sockaddr1,
                  const struct sockaddr *sockaddr2, socklen_t addrlen);
/* Returns: 0 if addresses are of the same family and ports are equal, 
   else nonzero 
*/

shichao-an

#include "unp.h"

char *sock_ntop(const struct sockaddr *sockaddr, socklen_t addrlen);

/* Returns: non-null pointer if OK, NULL on error */

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#include <arpa/inet.h>

int inet_pton(int family, const char *strptr, void *addrptr);
/* Returns: 1 if OK, 0 if input not a valid presentation format, -1 on error */

const char *inet_ntop(int family, const void *addrptr, char *strptr, size_t len);
/* Returns: pointer to result if OK, NULL on error */

shichao-an

#include <arpa/inet.h>

int inet_aton(const char *strptr, struct in_addr *addrptr);
/* Returns: 1 if string was valid, 0 on error */

in_addr_t inet_addr(const char *strptr);
/* Returns: 32-bit binary network byte ordered IPv4 address; INADDR_NONE if error */

char *inet_ntoa(struct in_addr inaddr);
/* Returns: pointer to dotted-decimal string */

shichao-an

#include <string.h>

void *memset(void *dest, int c, size_t len);
void *memcpy(void *dest, const void *src, size_t nbytes);
int memcmp(const void *ptr1, const void *ptr2, size_t nbytes);

/* Returns: 0 if equal, <0 or >0 if unequal (see text) */