8. Language-Specific Services for the C Programming Language Manager¶

8.1. Introduction¶

The language-specific services for the C programming language manager is …

The directives provided by the language-specific services for the C programming language manager are:

setlocale - Set the Current Locale
fileno - Obtain File Descriptor Number for this File
fdopen - Associate Stream with File Descriptor
flockfile - Acquire Ownership of File Stream
ftrylockfile - Poll to Acquire Ownership of File Stream
funlockfile - Release Ownership of File Stream
getc_unlocked - Get Character without Locking
getchar_unlocked - Get Character from stdin without Locking
putc_unlocked - Put Character without Locking
putchar_unlocked - Put Character to stdin without Locking
setjmp - Save Context for Non-Local Goto
longjmp - Non-Local Jump to a Saved Context
sigsetjmp - Save Context with Signal Status for Non-Local Goto
siglongjmp - Non-Local Jump with Signal Status to a Saved Context
tzset - Initialize Time Conversion Information
strtok_r - Reentrant Extract Token from String
asctime_r - Reentrant struct tm to ASCII Time Conversion
ctime_r - Reentrant time_t to ASCII Time Conversion
gmtime_r - Reentrant UTC Time Conversion
localtime_r - Reentrant Local Time Conversion
rand_r - Reentrant Random Number Generation

8.2. Background¶

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8.3. Operations¶

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8.4. Directives¶

This section details the language-specific services for the C programming language manager’s directives. A subsection is dedicated to each of this manager’s directives and describes the calling sequence, related constants, usage, and status codes.

8.4.1. setlocale - Set the Current Locale¶

CALLING SEQUENCE:

#include <locale.h>
char *setlocale(int category, const char *locale);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.2. fileno - Obtain File Descriptor Number for this File¶

CALLING SEQUENCE:

#include <stdio.h>
int fileno(FILE *stream);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.3. fdopen - Associate Stream with File Descriptor¶

CALLING SEQUENCE:

#include <stdio.h>
FILE *fdopen(int fildes, const char *mode);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.4. flockfile - Acquire Ownership of File Stream¶

CALLING SEQUENCE:

#include <stdio.h>
void flockfile(FILE *file);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.5. ftrylockfile - Poll to Acquire Ownership of File Stream¶

CALLING SEQUENCE:

#include <stdio.h>
int ftrylockfile(FILE *file);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.6. funlockfile - Release Ownership of File Stream¶

CALLING SEQUENCE:

#include <stdio.h>
void funlockfile(FILE *file);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.7. getc_unlocked - Get Character without Locking¶

CALLING SEQUENCE:

#include <stdio.h>
int getc_unlocked(FILE *stream);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.8. getchar_unlocked - Get Character from stdin without Locking¶

CALLING SEQUENCE:

#include <stdio.h>
int getchar_unlocked(void);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.9. putc_unlocked - Put Character without Locking¶

CALLING SEQUENCE:

#include <stdio.h>
int putc_unlocked(int c, FILE *stream);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.10. putchar_unlocked - Put Character to stdin without Locking¶

CALLING SEQUENCE:

#include <stdio.h>
int putchar_unlocked(int c);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.11. setjmp - Save Context for Non-Local Goto¶

CALLING SEQUENCE:

#include <setjmp.h>
int setjmp(jmp_buf env);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.12. longjmp - Non-Local Jump to a Saved Context¶

CALLING SEQUENCE:

#include <setjmp.h>
void longjmp(jmp_buf env, int val);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.13. sigsetjmp - Save Context with Signal Status for Non-Local Goto¶

CALLING SEQUENCE:

#include <setjmp.h>
int sigsetjmp(sigjmp_buf env, int savemask);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.14. siglongjmp - Non-Local Jump with Signal Status to a Saved Context¶

CALLING SEQUENCE:

#include <setjmp.h>
void siglongjmp(sigjmp_buf env, int val);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.15. tzset - Initialize Time Conversion Information¶

CALLING SEQUENCE:

#include <time.h>
extern int daylight;
extern long timezone;
extern char *tzname[2];
void tzset(void);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.16. strtok_r - Reentrant Extract Token from String¶

CALLING SEQUENCE:

#include <string.h>
char *strtok_r(char *restrict s, const char *restrict sep,
char **restrict state);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.17. asctime_r - Reentrant struct tm to ASCII Time Conversion¶

CALLING SEQUENCE:

#include <time.h>
char *asctime_r(const struct tm *restrict tm, char *restrict buf);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.18. ctime_r - Reentrant time_t to ASCII Time Conversion¶

CALLING SEQUENCE:

#include <time.h>
char *ctime_r(const time_t *clock, char *buf);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.19. gmtime_r - Reentrant UTC Time Conversion¶

CALLING SEQUENCE:

#include <time.h>
struct tm *gmtime_r(const time_t *restrict timer,
struct tm *restrict result);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.20. localtime_r - Reentrant Local Time Conversion¶

CALLING SEQUENCE:

#include <time.h>
struct tm *localtime_r(const time_t *restrict timer,
struct tm *restrict result);

STATUS CODES:

E

The

DESCRIPTION:

NOTES:

8.4.21. rand_r - Reentrant Random Number Generation¶

CALLING SEQUENCE:

#include <stdlib.h>
int rand_r(unsigned *seed);

STATUS CODES:

E

The

DESCRIPTION:

NOTES: