diff options
| author | Brandon Maier <brandon.maier@collins.com> | 2022-11-02 17:47:52 -0500 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-11-07 08:24:33 +0100 |
| commit | a28c5307d6c32a819521542903e678c3c544fa6c (patch) | |
| tree | dd4ddecebd83536df73153601d97dfdb5b30eddb /misc-utils | |
| parent | ccff5611fb1da96bc4aa805bc9a2f92ae6ce2255 (diff) | |
misc-utils: flashcp: check for lseek errors
Add a safe_lseek wrapper to check for lseek errors.
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'misc-utils')
| -rw-r--r-- | misc-utils/flashcp.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/misc-utils/flashcp.c b/misc-utils/flashcp.c index 061eea1..89d3386 100644 --- a/misc-utils/flashcp.c +++ b/misc-utils/flashcp.c @@ -170,13 +170,23 @@ static void safe_write (int fd,const void *buf,size_t count,size_t written,unsig } } -static void safe_rewind (int fd,const char *filename) +static off_t safe_lseek (int fd,off_t offset,int whence,const char *filename) { - if (lseek (fd,0L,SEEK_SET) < 0) + off_t off; + + off = lseek (fd,offset,whence); + if (off < 0) { - log_printf (LOG_ERROR,"While seeking to start of %s: %m\n",filename); + log_printf (LOG_ERROR,"While seeking on %s: %m\n",filename); exit (EXIT_FAILURE); } + + return off; +} + +static void safe_rewind (int fd,const char *filename) +{ + safe_lseek(fd,0L,SEEK_SET,filename); } /******************************************************************************/ @@ -455,7 +465,7 @@ DIFF_BLOCKS: safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE); /* read from device */ - current_dev_block = lseek(dev_fd, 0, SEEK_CUR); + current_dev_block = safe_lseek(dev_fd, 0, SEEK_CUR, device); safe_read (dev_fd,device,dest,i,flags & FLAG_VERBOSE); /* compare buffers, if not the same, erase and write the block */ @@ -463,7 +473,7 @@ DIFF_BLOCKS: { diffBlock++; /* erase block */ - lseek(dev_fd, current_dev_block, SEEK_SET); + safe_lseek(dev_fd, current_dev_block, SEEK_SET, device); if (ioctl (dev_fd,MEMERASE,&erase) < 0) { log_printf (LOG_NORMAL,"\n"); @@ -474,7 +484,7 @@ DIFF_BLOCKS: } /* write to device */ - lseek(dev_fd, current_dev_block, SEEK_SET); + safe_lseek(dev_fd, current_dev_block, SEEK_SET, device); safe_write(dev_fd,src,i,written,(unsigned long long)filestat.st_size,device,flags & FLAG_VERBOSE); } |