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kbuild: stop docproc segfaulting when SRCTREE isn't set. 

Prevent docproc from segfaulting when SRCTREE isn't set.

Signed-off-by: Rob Landley <rob@landley.net>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Rob Landley 2007-10-09 01:25:18 -05:00 committed by Sam Ravnborg
parent 4b21960f90
commit bb13be5145
1 changed files with 9 additions and 2 deletions
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11
scripts/basic/docproc.c
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@ -66,12 +66,15 @@ FILELINE * entity_system;
#define FUNCTION "-function"
#define NOFUNCTION "-nofunction"
char *srctree;
void usage (void)
{
fprintf(stderr, "Usage: docproc {doc|depend} file\n");
fprintf(stderr, "Input is read from file.tmpl. Output is sent to stdout\n");
fprintf(stderr, "doc: frontend when generating kernel documentation\n");
fprintf(stderr, "depend: generate list of files referenced within file\n");
fprintf(stderr, "Environment variable SRCTREE: absolute path to kernel source tree.\n");
}
/*
@ -90,7 +93,7 @@ void exec_kernel_doc(char **svec)
exit(1);
case 0:
memset(real_filename, 0, sizeof(real_filename));
strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
strncat(real_filename, srctree, PATH_MAX);
strncat(real_filename, KERNELDOCPATH KERNELDOC,
PATH_MAX - strlen(real_filename));
execvp(real_filename, svec);
@ -171,7 +174,7 @@ void find_export_symbols(char * filename)
if (filename_exist(filename) == NULL) {
char real_filename[PATH_MAX + 1];
memset(real_filename, 0, sizeof(real_filename));
strncat(real_filename, getenv("SRCTREE"), PATH_MAX);
strncat(real_filename, srctree, PATH_MAX);
strncat(real_filename, filename,
PATH_MAX - strlen(real_filename));
sym = add_new_file(filename);
@ -338,6 +341,10 @@ void parse_file(FILE *infile)
int main(int argc, char *argv[])
{
FILE * infile;
srctree = getenv("SRCTREE");
if (!srctree)
srctree = getcwd(NULL, 0);
if (argc != 3) {
usage();
exit(1);