ref: 3579757291db68f8e17a376476454996b7961bd7
dir: /sys/src/ape/cmd/pax/warn.c/
/* $Source: /u/mark/src/pax/RCS/warn.c,v $ * * $Revision: 1.2 $ * * warn.c - miscellaneous user warning routines * * DESCRIPTION * * These routines provide the user with various forms of warning * and informational messages. * * AUTHOR * * Mark H. Colburn, NAPS International ([email protected]) * * Sponsored by The USENIX Association for public distribution. * * Copyright (c) 1989 Mark H. Colburn. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice is duplicated in all such * forms and that any documentation, advertising materials, and other * materials related to such distribution and use acknowledge that the * software was developed * by Mark H. Colburn and sponsored by The * USENIX Association. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * $Log: warn.c,v $ * Revision 1.2 89/02/12 10:06:15 mark * 1.2 release fixes * * Revision 1.1 88/12/23 18:02:40 mark * Initial revision * */ #ifndef lint static char *ident = "$Id: warn.c,v 1.2 89/02/12 10:06:15 mark Exp $"; static char *copyright = "Copyright (c) 1989 Mark H. Colburn.\nAll rights reserved.\n"; #endif /* ! lint */ /* Headers */ #include "pax.h" /* Function Prototypes */ #ifdef __STDC__ static void prsize(FILE *, OFFSET); #else /* !__STDC__ */ static void prsize(); #endif /* __STDC__ */ /* warnarch - print an archive-related warning message and offset * * DESCRIPTION * * Present the user with an error message and an archive offset at * which the error occured. This can be useful for diagnosing or * fixing damaged archives. * * PARAMETERS * * char *msg - A message string to be printed for the user. * OFFSET adjust - An adjustment which is added to the current * archive position to tell the user exactly where * the error occurred. */ #ifdef __STDC__ void warnarch(char *msg, OFFSET adjust) #else void warnarch(msg, adjust) char *msg; OFFSET adjust; #endif { fprintf(stderr, "%s: [offset ", myname); prsize(stderr, total - adjust); fprintf(stderr, "]: %s\n", msg); } /* strerror - return pointer to appropriate system error message * * DESCRIPTION * * Get an error message string which is appropriate for the setting * of the errno variable. * * RETURNS * * Returns a pointer to a string which has an appropriate error * message for the present value of errno. The error message * strings are taken from sys_errlist[] where appropriate. If an * appropriate message is not available in sys_errlist, then a * pointer to the string "Unknown error (errno <errvalue>)" is * returned instead. */ #ifdef __STDC__ char *strerror(void) #else char *strerror() #endif { #ifdef _POSIX_SOURCE #undef strerror return (strerror(errno)); #else static char msg[40]; /* used for "Unknown error" messages */ if (errno > 0 && errno < sys_nerr) { return (sys_errlist[errno]); } sprintf(msg, "Unknown error (errno %d)", errno); return (msg); #endif } /* prsize - print a file offset on a file stream * * DESCRIPTION * * Prints a file offset to a specific file stream. The file offset is * of the form "%dm+%dk+%d", where the number preceeding the "m" and * the "k" stand for the number of Megabytes and the number of * Kilobytes, respectivley, which have been processed so far. * * PARAMETERS * * FILE *stream - Stream which is to be used for output * OFFSET size - Current archive position to be printed on the output * stream in the form: "%dm+%dk+%d". * */ #ifdef __STDC__ static void prsize(FILE *stream, OFFSET size) #else static void prsize(stream, size) FILE *stream; /* stream which is used for output */ OFFSET size; /* current archive position to be printed */ #endif { OFFSET n; if (n = (size / (1024L * 1024L))) { fprintf(stream, "%ldm+", n); size -= n * 1024L * 1024L; } if (n = (size / 1024L)) { fprintf(stream, "%ldk+", n); size -= n * 1024L; } fprintf(stream, "%ld", size); } /* fatal - print fatal message and exit * * DESCRIPTION * * Fatal prints the program's name along with an error message, then * exits the program with a non-zero return code. * * PARAMETERS * * char *why - description of reason for termination * * RETURNS * * Returns an exit code of 1 to the parent process. */ #ifdef __STDC__ void fatal(char *why) #else void fatal(why) char *why; /* description of reason for termination */ #endif { fprintf(stderr, "%s: %s\n", myname, why); exit(1); } /* warn - print a warning message * * DESCRIPTION * * Print an error message listing the program name, the actual error * which occurred and an informational message as to why the error * occurred on the standard error device. The standard error is * flushed after the error is printed to assure that the user gets * the message in a timely fasion. * * PARAMETERS * * char *what - Pointer to string describing what failed. * char *why - Pointer to string describing why did it failed. */ #ifdef __STDC__ void warn(char *what, char *why) #else void warn(what, why) char *what; /* message as to what the error was */ char *why; /* explanation why the error occurred */ #endif { fprintf(stderr, "%s: %s : %s\n", myname, what, why); fflush(stderr); }