pmflush(3) [centos man page]
PMPRINTF(3) Library Functions Manual PMPRINTF(3) NAME
pmprintf, pmflush - print formatted output in a window or to standard error C SYNOPSIS
#include <pcp/pmapi.h> int pmprintf(const char *fmt, ... /*args*/); int pmflush(void); cc ... -lpcp DESCRIPTION
The combination of pmprintf and pmflush produces output in either an xconfirm(1) window, on the standard error stream, or to a file in a manner similar to fprintf(3). The fmt argument is used to control the conversion, formatting, and printing of the variable length args list. The output technique is controlled via an environment variable. pmprintf appends the formatted message string to an internal buffer shared by the two routines, without actually producing any output. pmflush causes the internal buffer to be either displayed in a window, printed on standard error, or flushed to a file and the internal buffer to be cleared. ENVIRONMENT
The environment variable PCP_STDERR controls the output technique used by pmflush: If PCP_STDERR is unset, the text is written onto the stderr stream of the caller. If PCP_STDERR is set to the literal reserved word DISPLAY then the text will be displayed as a GUI dialog using xconfirm(1). If PCP_STDERR is set to any other value then pmflush interprets the value as a file name and appends the text to that file. The file is created if it doesn't already exist, and in this case if the file creation fails, then stderr is used instead). FILES
pmprintf uses the mkstemp(3) function to create a temporary file. This temporary file is deleted when pmflush is called. DIAGNOSTICS
On successful completion, pmprintf returns the number of characters transmitted, while pmflush returns a value of zero on successful com- pletion. For either routine, a negative value is returned if an error was encountered, and this can be passed to pmErrStr(3) to obtain the associ- ated error message. SEE ALSO
pmdbg(1), fprintf(3), mkstemp(3), pmErrStr(3) and PMAPI(3). Performance Co-Pilot PCP PMPRINTF(3)
Check Out this Related Man Page
explain_mkstemp(3) Library Functions Manual explain_mkstemp(3) NAME
explain_mkstemp - explain mkstemp(3) errors SYNOPSIS
#include <libexplain/mkstemp.h> const char *explain_mkstemp(char *templat); const char *explain_errno_mkstemp(int errnum, char *templat); void explain_message_mkstemp(char *message, int message_size, char *templat); void explain_message_errno_mkstemp(char *message, int message_size, int errnum, char *templat); DESCRIPTION
These functions may be used to obtain explanations for errors returned by the mkstemp(3) system call. explain_mkstemp const char *explain_mkstemp(char *templat); The explain_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(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. templat The original template, exactly as passed to the mkstemp(3) system call. Returns: The message explaining the error. This message buffer is shared by all libexplain functions which do not supply a buffer in their argument list. This will be overwritten by the next call to any libexplain function which shares this buffer, including other threads. Note: This function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library. Example: This function is intended to be used in a fashion similar to the following example: int result = mkstemp(templat); if (result < 0) { fprintf(stderr, "%s ", explain_mkstemp(templat)); exit(EXIT_FAILURE); } The above code example is available pre-packaged as the explain_mkstemp_or_die(3) function. explain_errno_mkstemp const char *explain_errno_mkstemp(int errnum, char *templat); The explain_errno_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(3) system call. The least the mes- sage will contain is the value of strerror(errno), but usually it will do much better, and indicate the underlying cause in more detail. errnum The error value to be decoded, usually obtained from the errno global variable just before this function is called. This is neces- sary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno. templat The original template, exactly as passed to the mkstemp(3) system call. Returns: The message explaining the error. This message buffer is shared by all libexplain functions which do not supply a buffer in their argument list. This will be overwritten by the next call to any libexplain function which shares this buffer, including other threads. Note: This function is not thread safe, because it shares a return buffer across all threads, and many other functions in this library. Example: This function is intended to be used in a fashion similar to the following example: int result = mkstemp(templat); if (result < 0) { int err = errno; fprintf(stderr, "%s ", explain_errno_mkstemp(err, templat)); exit(EXIT_FAILURE); } The above code example is available pre-packaged as the explain_mkstemp_or_die(3) function. explain_message_mkstemp void explain_message_mkstemp(char *message, int message_size, char *templat); The explain_message_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(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. message The location in which to store the returned message. If a suitable message return buffer is supplied, this function is thread safe. message_size The size in bytes of the location in which to store the returned message. templat The original template, exactly as passed to the mkstemp(3) system call. Example: This function is intended to be used in a fashion similar to the following example: int result = mkstemp(templat); if (result < 0) { char message[3000]; explain_message_mkstemp(message, sizeof(message), templat); fprintf(stderr, "%s ", message); exit(EXIT_FAILURE); } The above code example is available pre-packaged as the explain_mkstemp_or_die(3) function. explain_message_errno_mkstemp void explain_message_errno_mkstemp(char *message, int message_size, int errnum, char *templat); The explain_message_errno_mkstemp function is used to obtain an explanation of an error returned by the mkstemp(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. message The location in which to store the returned message. If a suitable message return buffer is supplied, this function is thread safe. message_size The size in bytes of the location in which to store the returned message. errnum The error value to be decoded, usually obtained from the errno global variable just before this function is called. This is neces- sary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno. templat The original template, exactly as passed to the mkstemp(3) system call. Example: This function is intended to be used in a fashion similar to the following example: int result = mkstemp(templat); if (result < 0) { int err = errno; char message[3000]; explain_message_errno_mkstemp(message, sizeof(message), err, templat); fprintf(stderr, "%s ", message); exit(EXIT_FAILURE); } The above code example is available pre-packaged as the explain_mkstemp_or_die(3) function. SEE ALSO
mkstemp(3) create a unique temporary file explain_mkstemp_or_die(3) create a unique temporary file and report errors COPYRIGHT
libexplain version 0.52 Copyright (C) 2009 Peter Miller explain_mkstemp(3)