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Fix "file" so that it prints the program names from core files

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correctly.
This commit is contained in:
jdp 1998-10-03 04:38:58 +00:00
parent 263a0986b4
commit 590984c836
1 changed files with 16 additions and 12 deletions
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28
usr.bin/file/readelf.c
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@ -1,7 +1,7 @@
#ifndef lint
static const char rcsid[] =
"$Id: readelf.c,v 1.3 1998/01/28 07:36:25 charnier Exp $";
"$Id: readelf.c,v 1.4 1998/02/20 04:54:00 jb Exp $";
#endif /* not lint */
#ifdef BUILTIN_ELF
@ -85,6 +85,7 @@ dophn_exec(fd, off, num, size, buf)
}
size_t prpsoffsets[] = {
8, /* FreeBSD */
100, /* SunOS 5.x */
32, /* Linux */
};
@ -93,14 +94,15 @@ size_t prpsoffsets[] = {
/*
* Look through the program headers of an executable image, searching
* for a PT_NOTE section of type NT_PRPSINFO, with a name "CORE"; if one
* is found, try looking in various places in its contents for a 16-character
* string containing only printable characters - if found, that string
* should be the name of the program that dropped core.
* Note: right after that 16-character string is, at least in SunOS 5.x
* (and possibly other SVR4-flavored systems) and Linux, a longer string
* (80 characters, in 5.x, probably other SVR4-flavored systems, and Linux)
* containing the start of the command line for that program.
* for a PT_NOTE section of type NT_PRPSINFO, with a name "CORE" or
* "FreeBSD"; if one is found, try looking in various places in its
* contents for a 16-character string containing only printable
* characters - if found, that string should be the name of the program
* that dropped core. Note: right after that 16-character string is,
* at least in SunOS 5.x (and possibly other SVR4-flavored systems) and
* Linux, a longer string (80 characters, in 5.x, probably other
* SVR4-flavored systems, and Linux) containing the start of the
* command line for that program.
*/
static void
dophn_core(fd, off, num, size, buf)
@ -159,7 +161,8 @@ dophn_core(fd, off, num, size, buf)
}
/*
* Make sure this note has the name "CORE".
* Make sure this note has the name "CORE" or
* "FreeBSD".
*/
if (offset + nh->n_namesz >= bufsize) {
/*
@ -167,8 +170,9 @@ dophn_core(fd, off, num, size, buf)
*/
break;
}
if (nh->n_namesz != 5
|| strcmp(&nbuf[offset], "CORE") != 0)
if (nbuf[offset + nh->n_namesz - 1] != '\0' ||
(strcmp(&nbuf[offset], "CORE") != 0 &&
strcmp(&nbuf[offset], "FreeBSD") != 0))
continue;
offset += nh->n_namesz;
offset = ((offset + 3)/4)*4;