From: I1269U Newsgroups: comp.os.msdos.djgpp Subject: DJGPP specific strcpy() error Date: Sat, 26 Jun 1999 21:36:34 GMT Organization: Deja.com - Share what you know. Learn what you don't. Lines: 74 Message-ID: <7l3h51$7vv$1@nnrp1.deja.com> NNTP-Posting-Host: 206.107.126.39 X-Article-Creation-Date: Sat Jun 26 21:36:34 1999 GMT X-Http-User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt) X-Http-Proxy: 1.1 x36.deja.com:80 (Squid/1.1.22) for client 206.107.126.39 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com I wrote some code the other day at school that works fine for all three different compilers that I use (MS Quick C, cc on VAX/VMS, and gcc on UNIX). Essentially, I defined a structure with four strings, and a pointer to a similar structure (ala linked list). Now, after gathering the information to put into the four strings, I'd try to use strcpy() to transfer the strings out of the local variables and into the structure members. The code that I used looks something like this: #include #include struct record { char ssn[10]; /* Social security # */ char lname[21]; /* Last name */ char fname[21]; /* First name */ char dob[9]; /* Date of birth */ struct record *next; /* Point to next item in list */ }; typedef struct record RECORD; main() { RECORD *testing; /* Structured this way for readability */ /* Simulated input from user */ char ssn[10] = "123456789"; char lname[21] = "Smith"; char fname[21] = "John"; char dob[9] = "01/01/99"; strcpy(testing->ssn, ssn); strcpy(testing->lname, lname); strcpy(testing->fname, fname); strcpy(testing->dob, dob); } /* End of code */ I would normally print this info or something, but it's useless at this point, since I get kicked out of the program (at run time) when trying to strcpy(). This only happens with DJGPP, and not with any other compilers. Just so you know, it compiles and links just fine. Anyway, I get an exit code of 255 (or 0x00ff for you hex freeks out there, heh heh). After clicking okay, a brief message pops up, then dissappears that says: Exiting due to signal SIGSEGV General Protection Fault at eip=000043c6 ...(more register contents follow)... One thing I notice, which may have nothing to do with it, is some of the register listings look something like this: cs: sel=043f base=83b4f000 limit=0009ffff Looks like I may have something in the register that is greater than the "limit" (or are those segment specifiers?...need to learn assembly, eh)? There are about four registers (segments?) that display the same kind of thing. Probably nothing, eh? Anyway, when that disappears, it is replaced by the following: Call frame traceback: in function strcpy+14 prog1.c(26) in function main in function __crt1_startup+174 I hope some of this made sense to someone. Anyway, is it something with DJGPP, or perhaps RHIDE? Or is it just somehow non-portable code which only DJGPP finds to be so? Thanks in advance. Sent via Deja.com http://www.deja.com/ Share what you know. Learn what you don't.