Flashnux

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

Unix

Unix v6

perror(3)



perror, syserrlist, sysnerr, errno system error messages perror(s)
char *s; int sysnerr;
char *syserrlist[]; int errno;

produces a short error message describing the last error encountered during a call to the system from a C program. First the argument string is printed, then a colon, then the message and a new-line. Most usefully, the argument string is the name of the program which incurred the error. The error number is taken from the external variable which is set when errors occur but not cleared when non-erroneous calls are made. To simplify variant formatting of messages, the vector of message strings is provided; can be used as an index in this table to get the message string without the newline. is the largest message number provided for in the table; it should be checked because new error codes may be added to the system before they are added to the table. Introduction to System Calls



perror(3)