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NAMEexplain_getgrent - explain getgrent(3) errorsSYNOPSIS#include <libexplain/getgrent.h> const char *explain_getgrent(void);DESCRIPTIONThese functions may be used to obtain explanations for errors returned by the getgrent(3) system call.explain_getgrentconst char *explain_getgrent(void); The explain_getgrent function is used to obtain an explanation of an error returned by the getgrent(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail. The errno global variable will be used to obtain the error value to be decoded.
errno = 0;
The above code example is available pre-packaged as the
explain_getgrent_or_die(3) function.
struct group *result = getgrent(); { fprintf(stderr, "%s\n", explain_getgrent()); exit(EXIT_FAILURE); } explain_errno_getgrentconst char *explain_errno_getgrent(int errnum, void); The explain_errno_getgrent function is used to obtain an explanation of an error returned by the getgrent(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.
errno = 0;
The above code example is available pre-packaged as the
explain_getgrent_or_die(3) function.
struct group *result = getgrent(); { int err = errno; fprintf(stderr, "%s\n", explain_errno_getgrent(err, )); exit(EXIT_FAILURE); } explain_message_getgrentvoid explain_message_getgrent(char *message, int message_size, void); The explain_message_getgrent function is used to obtain an explanation of an error returned by the getgrent(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail. The errno global variable will be used to obtain the error value to be decoded.
errno = 0;
The above code example is available pre-packaged as the
explain_getgrent_or_die(3) function.
struct group *result = getgrent(); { char message[3000];explain_message_getgrent(message, sizeof(message), );
explain_message_errno_getgrentvoid explain_message_errno_getgrent(char *message, int message_size, int errnum, void); The explain_message_errno_getgrent function is used to obtain an explanation of an error returned by the getgrent(3) system call. The least the message will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail.
errno = 0;
The above code example is available pre-packaged as the
explain_getgrent_or_die(3) function.
struct group *result = getgrent(); { int err = errno; char message[3000];explain_message_errno_getgrent(message, sizeof(message), err, );
SEE ALSO
COPYRIGHTlibexplain version 1.3
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