Advanced Programming in the UNIX® Environment

ptg10805159

890 Function Prototypes Appendix A

int truncate(const char *path,off_tlength);

<unistd.h> p. 112

Returns: 0 if OK,−1 on error

char *ttyname(intfd);

<unistd.h> p. 695

Returns: pointer to pathname of terminal,NULLon error

mode_t umask(mode_tcmask);

<sys/stat.h> p. 104

Returns: previous file mode creation mask

int uname(struct utsname *name);

<sys/utsname.h> p. 187

Returns: non-negative value if OK,−1 on error

int ungetc(intc,FILE *fp);

<stdio.h> p. 151

Returns:cif OK,EOFon error

int unlink(const char *path);

<unistd.h> p. 117

Returns: 0 if OK,−1 on error

int unlinkat(intfd,const char *path,intflag);

<unistd.h> p. 117

flag:AT_REMOVEDIR

Returns: 0 if OK,−1 on error

int unlockpt(intfd);

<stdlib.h> p. 723

Returns: 0 on success,−1 on error

int unsetenv(const char *name);

<stdlib.h> p. 212

Returns: 0 if OK,−1 on error

int utimensat(intfd,const char *path,

const struct timespectimes[2], intflag);

<sys/stat.h> p. 126

flag:AT_SYMLINK_NOFOLLOW

Returns: 0 if OK,−1 on error

int utimes(const char *path,const struct timevaltimes[2]);

<sys/time.h> p. 127

Returns: 0 if OK,−1 on error