Bug Summary

File:dump.c
Warning:line 28, column 12
The 1st argument to 'fdopen' is < 0 but should be >= 0

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name dump.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/scan-build-libnsfb -fcoverage-compilation-dir=/var/lib/jenkins/workspace/scan-build-libnsfb -resource-dir /usr/lib/llvm-19/lib/clang/19 -D _BSD_SOURCE -D _DEFAULT_SOURCE -D _POSIX_C_SOURCE=200112L -I /var/lib/jenkins/workspace/scan-build-libnsfb/include/ -I /var/lib/jenkins/workspace/scan-build-libnsfb/src -D _ALIGNED=__attribute__((aligned)) -D STMTEXPR=1 -D DEBUG -internal-isystem /usr/lib/llvm-19/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -Og -Wwrite-strings -Wno-error -std=c99 -fconst-strings -ferror-limit 19 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -analyzer-display-progress -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /var/lib/jenkins/workspace/scan-build-libnsfb/clangScanBuildReports/2025-10-23-232730-2752870-1 -x c src/dump.c
1/*
2 * Copyright 2009 Vincent Sanders <vince@simtec.co.uk>
3 *
4 * This file is part of libnsfb, http://www.netsurf-browser.org/
5 * Licenced under the MIT License,
6 * http://www.opensource.org/licenses/mit-license.php
7 */
8
9#include <stdbool.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <unistd.h>
13
14#include "libnsfb.h"
15#include "libnsfb_plot.h"
16#include "libnsfb_event.h"
17#include "nsfb.h"
18#include "surface.h"
19
20/* exported interface documented in libnsfb.h */
21bool_Bool
22nsfb_dump(nsfb_t *nsfb, int fd)
1
[debug] analyzing from nsfb_dump
23{
24 FILE *outf;
25 int x;
26 int y;
27
28 outf = fdopen(dup(fd), "w");
2
Assuming that 'dup' fails
3
The 1st argument to 'fdopen' is < 0 but should be >= 0
29 if (outf == NULL((void*)0)) {
30 return false0;
31 }
32
33 fprintf(outf,"P3\n#libnsfb buffer dump\n%d %d\n255\n",
34 nsfb->width, nsfb->height);
35 for (y=0; y < nsfb->height; y++) {
36 for (x=0; x < nsfb->width; x++) {
37 fprintf(outf,"%d %d %d ",
38 *(nsfb->ptr + (((nsfb->width * y) + x) * 4) + 2),
39 *(nsfb->ptr + (((nsfb->width * y) + x) * 4) + 1),
40 *(nsfb->ptr + (((nsfb->width * y) + x) * 4) + 0));
41
42 }
43 fprintf(outf,"\n");
44 }
45
46 fclose(outf);
47
48 return true1;
49}
50
51/*
52 * Local variables:
53 * c-basic-offset: 4
54 * tab-width: 8
55 * End:
56 */