我正在编写为我编写 LaTeX 文件的 C 代码。然后我尝试在非交互模式下使用 pdflatex 编译文件（因为我正在自动化一些过程并且不想等待用户输入致命错误）。LaTeX 文件在 处输出，./data/output_date.tex我尝试使用命令对其进行编译
system("./pdflatex --interaction=nonstopmode --output-directory=data ./data/output_date.tex");
但是，我收到错误消息：
This is pdfTeX, Version 3.1415926-1.40.10 (TeX Live 2009/Debian)
entering extended mode
(./data/output_date.tex
LaTeX2e <2009/09/24>
Babel <v3.8l> and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, loaded.
(/usr/share/texmf-texlive/tex/latex/base/article.cls
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
(/usr/share/texmf-texlive/tex/latex/base/size10.clo))
(/usr/share/texmf-texlive/tex/latex/pbox/pbox.sty
(/usr/share/texmf-texlive/tex/latex/tools/calc.sty)
(/usr/share/texmf-texlive/tex/latex/base/ifthen.sty))
(data/output_2013_date.aux))
! Emergency stop.
<*> ./data/output_date.tex
! ==> Fatal error occurred, no output PDF file produced!
Transcript written on data/output_date.log.
我似乎无法解释为什么我会紧急停止，特别是因为当我从终端运行相同的命令（与 C 可执行文件相同的文件夹）时，LaTeX 可以很好地编译为 pdf。
因为我将编译器作为 C 代码中的命令调用，所以我必须做一些特别的事情吗？
编辑：这是相应 .log 文件的文本。它似乎唯一说的是“找不到合法的 \end”，这让我感到困惑，因为我检查了源文件以确保我的 \begin 和 \end 匹配。
This is pdfTeX, Version 3.1415926-1.40.10 (TeX Live 2009/Debian) (format=pdflatex 2013.5.23) 15 JUL 2013 09:50
entering extended mode
%&-line parsing enabled.
**./data/output_date.tex
(./data/output_date.tex
LaTeX2e <2009/09/24>
Babel <v3.8l> and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, loaded.
(/usr/share/texmf-texlive/tex/latex/base/article.cls
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
(/usr/share/texmf-texlive/tex/latex/base/size10.clo
File: size10.clo 2007/10/19 v1.4h Standard LaTeX file (size option)
)
\c@part=\count79
\c@section=\count80
\c@subsection=\count81
\c@subsubsection=\count82
\c@paragraph=\count83
\c@subparagraph=\count84
\c@figure=\count85
\c@table=\count86
\abovecaptionskip=\skip41
\belowcaptionskip=\skip42
\bibindent=\dimen102
)
(/usr/share/texmf-texlive/tex/latex/pbox/pbox.sty
Package: pbox 2003/04/06 v1.0 Dynamic parboxes
(/usr/share/texmf-texlive/tex/latex/tools/calc.sty
Package: calc 2007/08/22 v4.3 Infix arithmetic (KKT,FJ)
\calc@Acount=\count87
\calc@Bcount=\count88
\calc@Adimen=\dimen103
\calc@Bdimen=\dimen104
\calc@Askip=\skip43
\calc@Bskip=\skip44
LaTeX Info: Redefining \setlength on input line 76.
LaTeX Info: Redefining \addtolength on input line 77.
\calc@Ccount=\count89
\calc@Cskip=\skip45
)
(/usr/share/texmf-texlive/tex/latex/base/ifthen.sty
Package: ifthen 2001/05/26 v1.1c Standard LaTeX ifthen package (DPC)
)
\pb@xlen=\skip46
)
(data/output_date.aux)
\openout1 = `output_date.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 8.
LaTeX Font Info: ... okay on input line 8.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <12> on input line 9.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <8> on input line 9.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <6> on input line 9.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <7> on input line 15.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <5> on input line 15.
)
! Emergency stop.
<*> ./data/output_date.tex
*** (job aborted, no legal \end found)
Here is how much of TeX's memory you used:
375 strings out of 495061
4422 string characters out of 1182621
56939 words of memory out of 3000000
3619 multiletter control sequences out of 15000+50000
6675 words of font info for 24 fonts, out of 3000000 for 9000
28 hyphenation exceptions out of 8191
23i,14n,19p,304b,189s stack positions out of 5000i,500n,10000p,200000b,50000s
! ==> Fatal error occurred, no output PDF file produced!