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psignal(3) [bsd man page]

PSIGNAL(3)						     Library Functions Manual							PSIGNAL(3)

psignal, sys_siglist - system signal messages SYNOPSIS
psignal(sig, s) unsigned sig; char *s; char *sys_siglist[]; DESCRIPTION
Psignal produces a short message on the standard error file describing the indicated signal. First the argument string s is printed, then a colon, then the name of the signal and a new-line. Most usefully, the argument string is the name of the program which incurred the sig- nal. The signal number should be from among those found in <signal.h>. To simplify variant formatting of signal names, the vector of message strings sys_siglist is provided; the signal number can be used as an index in this table to get the signal name without the newline. The define NSIG defined in <signal.h> is the number of messages provided for in the table; it should be checked because new signals may be added to the system before they are added to the table. SEE ALSO
sigvec(2), perror(3) 4.2 Berkeley Distribution May 15, 1985 PSIGNAL(3)

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PSIGNAL(3)						   BSD Library Functions Manual 						PSIGNAL(3)

psignal, strsignal, sys_siglist, sys_signame -- system signal messages LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <signal.h> void psignal(unsigned sig, const char *s); extern const char * const sys_siglist[]; extern const char * const sys_signame[]; #include <string.h> char * strsignal(int sig); DESCRIPTION
The psignal() and strsignal() functions locate the descriptive message string for a signal number. The strsignal() function accepts a signal number argument sig and returns a pointer to the corresponding message string. The psignal() function accepts a signal number argument sig and writes it to the standard error. If the argument s is non-NULL and does not point to the null character, s is written to the standard error file descriptor prior to the message string, immediately followed by a colon and a space. If the signal number is not recognized (sigaction(2)), the string ``Unknown signal'' is produced. The message strings can be accessed directly through the external array sys_siglist, indexed by recognized signal numbers. The external array sys_signame is used similarly and contains short, lower-case abbreviations for signals which are useful for recognizing signal names in user input. The defined variable NSIG contains a count of the strings in sys_siglist and sys_signame. SEE ALSO
sigaction(2), perror(3), strerror(3) HISTORY
The psignal() function appeared in 4.2BSD. BSD
February 27, 1995 BSD
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