mirror of
https://github.com/adulau/ootp.git
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68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
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#include "fileio.h"
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#include "xerr.h"
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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/*
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* load file into memory.
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*/
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char *file_load(char *fname)
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{
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struct stat sb;
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char *buf;
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int fd, ret, len;
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ret = -1; /* fail */
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buf = (char*)0L;
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fd = -1; /* invalid */
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/* open file */
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if ((fd = open(fname, O_RDONLY, 0)) < 0) {
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xerr_warn("open(%s)", fname);
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goto file_load_out;
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}
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/* load metadata */
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if (fstat(fd, &sb) < 0) {
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xerr_warn("stat(%s)", fname);
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goto file_load_out;
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}
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/* allocate storage for file contents + null */
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if (!(buf = malloc(sb.st_size+1))) {
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xerr_warn("malloc(%d)", (int)sb.st_size+1);
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goto file_load_out;
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}
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/* read file contents */
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if ((len = read(fd, buf, sb.st_size)) < 0) {
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xerr_warn("read(%s)", fname);
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goto file_load_out;
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}
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/* null terminate */
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buf[sb.st_size] = 0;
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if (len != sb.st_size) {
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xerr_warnx("short read(%s)", fname);
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goto file_load_out;
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}
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ret = 0; /* success */
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file_load_out:
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if (fd != -1)
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close(fd);
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if ((ret == -1) && buf) {
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free(buf);
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buf = (char*)0L;
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}
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return buf;
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} /* file_load */
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