asctime_r
char *asctime_r (
const struct tm*tm,
char *buf);
Convert the 'broken-down' time in the structure pointed to by tm into a string, which is stored in the buffer pointed to by buf. The buffer pointed to by buf must
contain at least 26 bytes. The function returns a pointer to the buffer on success, or NULL on failure.
References: 6.5.4 Headers: <time.h>
ctime_r
char *ctime_r (
const time_t *clock, char *buf);
Convert the calendar time pointed to by clock into a string representing the local time, which is stored in the buffer pointed to by buf. The buffer pointed to by buf must contain at least 26 bytes. The function returns a pointer to the buffer on success, or NULL on failure.
References: 6.5.4 Headers: <time.h>
gmtime_r
struct tm *gmtime_r (
const time_t *clock, struct tm *result);
Convert the calendar time pointed to by clock into a 'broken-down time' expressed as Coordinated Universal Time (UTC), which is stored in the structure pointed to by result. The function returns a pointer to the structure on success, or NULL on failure.
References: 6.5.4 Headers: <time.h>
localtime_r
struct tm *localtime_r (
const time_t *clock, struct tm *result);
Convert the calendar time pointed to by clock into a 'broken-down time' expressed as local time, which is stored in the structure pointed to by result. The function returns a pointer to the structure on success, or NULL on failure.
References: 6.5.4 Headers: <time.h>
rand_r
int rand_r (
unsigned int *seed);
Return the next value in a sequence of pseudorandom integers in the range of 0 to RAND_MAX. Whereas rand uses a static variable to maintain the context between a series of calls, rand_r uses the value pointed to by seed, which is supplied by the caller.
References: 6.5.5 Headers: <stdlib.h>
getgrgid_r
int getgrgid_r (
gid_t gid,
struct group *group,
char *buffer,
size_t bufsize,
struct group **result);
Locate an entry from the group database with a group id matching the gid argument. The group entry is stored in the memory pointed to by buffer, which contains bufsize bytes, and a pointer to the entry is stored at the address pointed to by result. The maximum buffer size required can be determined by calling sysconf with the _SC_GETGR_R_SIZE_MAX parameter.
References: 6.5.6
Headers: <sys/types.h>,<grp.h>
Errors: [ERANGE] the specified buffer is too small.
| getgrnam
r
int getgrnam_r (
const char *name,
struct group *group,
char *buffer,
size_t bufsize,
struct group **result);
Locate an entry from the group database with a group name matching the name argument. The group entry is stored in the memory pointed to by buffer, which contains bufsize bytes, and a pointer to the entry is stored at the address pointed to by result. The maximum buffer size required can be determined by calling sysconf with the _SC_GETGR_R_SIZE_MAX parameter.
References: 6.5.6 Headers: <sys/types.h>, <grp.h>
Errors: [ERANGE] the specified buffer is too small.
getpwuid_r
int getpwuid_r (
uid_t uid,
struct passwd *pwd,
char *buffer,
size_t bufsize,
struct passwd **result);
Locate an entry from the user database with a user id matching the uid argument. The user entry is stored in the memory pointed to by buffer, which contains bufsize bytes, and a pointer to the entry is stored at the address pointed to by result. The maximum buffer size required can be determined by calling sysconf with the _SC_GETPW_R_SIZE_MAX parameter.
References: 6.5.6
Headers: <sys/types.h>, <pwd.h>
Errors: [ERANGE ] the specified buffer is too small.
getpwnam_r
int getpwnam_r (
const char *name,
struct passwd *pwd,
char *buffer,
size_t bufsize,
struct passwd **result);
Locate an entry from the user database with a user name matching the name argument. The user entry is stored in the memory pointed to by buffer, which contains bufsize bytes, and a pointer to the entry is stored at the address pointed to by result. The maximum buffer size required can be determined by calling sysconf with the _SC_GETPW_R_SIZE_MAX parameter.
References: 6.5.6
Headers: <sys/types.h>, <pwd.h>
Errors: [ERANGE] the specified buffer is too small.
9.3.12 Signals
Pthreads provides functions that extend the POSIX signal model to support multithreaded processes. All threads in a process share the same signal actions. Each thread has its own pending and blocked signal masks. The
